2545 lines
93 KiB
C
2545 lines
93 KiB
C
/*
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* i386 signal handling routines
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*
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* Copyright 1999 Alexandre Julliard
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
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*/
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#if 0
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#pragma makedep unix
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#endif
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#ifdef __i386__
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#include "config.h"
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#include "wine/port.h"
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#include <errno.h>
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#include <signal.h>
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#include <stdlib.h>
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#include <stdarg.h>
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#include <stdio.h>
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#include <sys/types.h>
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#include <assert.h>
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#ifdef HAVE_UNISTD_H
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# include <unistd.h>
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#endif
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#ifdef HAVE_SYS_PARAM_H
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# include <sys/param.h>
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#endif
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#ifdef HAVE_SYSCALL_H
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# include <syscall.h>
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#else
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# ifdef HAVE_SYS_SYSCALL_H
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# include <sys/syscall.h>
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# endif
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#endif
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#ifdef HAVE_SYS_SIGNAL_H
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# include <sys/signal.h>
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#endif
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#ifdef HAVE_SYS_UCONTEXT_H
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# include <sys/ucontext.h>
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#endif
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#include "ntstatus.h"
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#define WIN32_NO_STATUS
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#include "windef.h"
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#include "winternl.h"
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#include "ddk/wdm.h"
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#include "wine/asm.h"
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#include "wine/exception.h"
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#include "unix_private.h"
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#include "wine/debug.h"
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WINE_DEFAULT_DEBUG_CHANNEL(seh);
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#undef ERR /* Solaris needs to define this */
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/***********************************************************************
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* signal context platform-specific definitions
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*/
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#ifdef __linux__
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#ifndef HAVE_SYS_UCONTEXT_H
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enum
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{
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REG_GS, REG_FS, REG_ES, REG_DS, REG_EDI, REG_ESI, REG_EBP, REG_ESP,
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REG_EBX, REG_EDX, REG_ECX, REG_EAX, REG_TRAPNO, REG_ERR, REG_EIP,
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REG_CS, REG_EFL, REG_UESP, REG_SS, NGREG
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};
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typedef int greg_t;
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typedef greg_t gregset_t[NGREG];
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struct _libc_fpreg
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{
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unsigned short significand[4];
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unsigned short exponent;
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};
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struct _libc_fpstate
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{
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unsigned long cw;
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unsigned long sw;
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unsigned long tag;
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unsigned long ipoff;
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unsigned long cssel;
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unsigned long dataoff;
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unsigned long datasel;
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struct _libc_fpreg _st[8];
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unsigned long status;
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};
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typedef struct _libc_fpstate* fpregset_t;
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typedef struct
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{
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gregset_t gregs;
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fpregset_t fpregs;
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unsigned long oldmask;
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unsigned long cr2;
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} mcontext_t;
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typedef struct ucontext
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{
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unsigned long uc_flags;
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struct ucontext *uc_link;
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stack_t uc_stack;
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mcontext_t uc_mcontext;
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sigset_t uc_sigmask;
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} ucontext_t;
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#endif /* HAVE_SYS_UCONTEXT_H */
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#ifndef FP_XSTATE_MAGIC1
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#define FP_XSTATE_MAGIC1 0x46505853
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#endif
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#define EAX_sig(context) ((context)->uc_mcontext.gregs[REG_EAX])
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#define EBX_sig(context) ((context)->uc_mcontext.gregs[REG_EBX])
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#define ECX_sig(context) ((context)->uc_mcontext.gregs[REG_ECX])
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#define EDX_sig(context) ((context)->uc_mcontext.gregs[REG_EDX])
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#define ESI_sig(context) ((context)->uc_mcontext.gregs[REG_ESI])
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#define EDI_sig(context) ((context)->uc_mcontext.gregs[REG_EDI])
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#define EBP_sig(context) ((context)->uc_mcontext.gregs[REG_EBP])
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#define ESP_sig(context) ((context)->uc_mcontext.gregs[REG_ESP])
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#define CS_sig(context) ((context)->uc_mcontext.gregs[REG_CS])
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#define DS_sig(context) ((context)->uc_mcontext.gregs[REG_DS])
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#define ES_sig(context) ((context)->uc_mcontext.gregs[REG_ES])
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#define SS_sig(context) ((context)->uc_mcontext.gregs[REG_SS])
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#define FS_sig(context) ((context)->uc_mcontext.gregs[REG_FS])
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#define GS_sig(context) ((context)->uc_mcontext.gregs[REG_GS])
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#define EFL_sig(context) ((context)->uc_mcontext.gregs[REG_EFL])
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#define EIP_sig(context) ((context)->uc_mcontext.gregs[REG_EIP])
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#define TRAP_sig(context) ((context)->uc_mcontext.gregs[REG_TRAPNO])
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#define ERROR_sig(context) ((context)->uc_mcontext.gregs[REG_ERR])
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#define FPU_sig(context) ((FLOATING_SAVE_AREA*)((context)->uc_mcontext.fpregs))
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#define FPUX_sig(context) (FPU_sig(context) && !((context)->uc_mcontext.fpregs->status >> 16) ? (XSAVE_FORMAT *)(FPU_sig(context) + 1) : NULL)
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#define XState_sig(fpu) (((unsigned int *)fpu->Reserved4)[12] == FP_XSTATE_MAGIC1 ? (XSTATE *)(fpu + 1) : NULL)
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#ifdef __ANDROID__
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/* custom signal restorer since we may have unmapped the one in vdso, and bionic doesn't check for that */
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void rt_sigreturn(void);
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__ASM_GLOBAL_FUNC( rt_sigreturn,
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"movl $173,%eax\n\t" /* NR_rt_sigreturn */
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"int $0x80" );
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#endif
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struct modify_ldt_s
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{
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unsigned int entry_number;
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void *base_addr;
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unsigned int limit;
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unsigned int seg_32bit : 1;
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unsigned int contents : 2;
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unsigned int read_exec_only : 1;
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unsigned int limit_in_pages : 1;
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unsigned int seg_not_present : 1;
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unsigned int usable : 1;
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unsigned int garbage : 25;
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};
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static inline int modify_ldt( int func, struct modify_ldt_s *ptr, unsigned long count )
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{
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return syscall( 123 /* SYS_modify_ldt */, func, ptr, count );
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}
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static inline int set_thread_area( struct modify_ldt_s *ptr )
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{
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return syscall( 243 /* SYS_set_thread_area */, ptr );
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}
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#elif defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__DragonFly__)
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#include <machine/trap.h>
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#include <machine/segments.h>
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#include <machine/sysarch.h>
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#define EAX_sig(context) ((context)->uc_mcontext.mc_eax)
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#define EBX_sig(context) ((context)->uc_mcontext.mc_ebx)
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#define ECX_sig(context) ((context)->uc_mcontext.mc_ecx)
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#define EDX_sig(context) ((context)->uc_mcontext.mc_edx)
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#define ESI_sig(context) ((context)->uc_mcontext.mc_esi)
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#define EDI_sig(context) ((context)->uc_mcontext.mc_edi)
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#define EBP_sig(context) ((context)->uc_mcontext.mc_ebp)
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#define CS_sig(context) ((context)->uc_mcontext.mc_cs)
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#define DS_sig(context) ((context)->uc_mcontext.mc_ds)
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#define ES_sig(context) ((context)->uc_mcontext.mc_es)
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#define FS_sig(context) ((context)->uc_mcontext.mc_fs)
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#define GS_sig(context) ((context)->uc_mcontext.mc_gs)
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#define SS_sig(context) ((context)->uc_mcontext.mc_ss)
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#define TRAP_sig(context) ((context)->uc_mcontext.mc_trapno)
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#define ERROR_sig(context) ((context)->uc_mcontext.mc_err)
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#define EFL_sig(context) ((context)->uc_mcontext.mc_eflags)
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#define EIP_sig(context) ((context)->uc_mcontext.mc_eip)
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#define ESP_sig(context) ((context)->uc_mcontext.mc_esp)
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#define FPU_sig(context) NULL /* FIXME */
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#define FPUX_sig(context) NULL /* FIXME */
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#define XState_sig(context) NULL /* FIXME */
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#elif defined (__OpenBSD__)
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#include <machine/segments.h>
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#include <machine/sysarch.h>
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#define EAX_sig(context) ((context)->sc_eax)
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#define EBX_sig(context) ((context)->sc_ebx)
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#define ECX_sig(context) ((context)->sc_ecx)
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#define EDX_sig(context) ((context)->sc_edx)
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#define ESI_sig(context) ((context)->sc_esi)
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#define EDI_sig(context) ((context)->sc_edi)
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#define EBP_sig(context) ((context)->sc_ebp)
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#define CS_sig(context) ((context)->sc_cs)
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#define DS_sig(context) ((context)->sc_ds)
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#define ES_sig(context) ((context)->sc_es)
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#define FS_sig(context) ((context)->sc_fs)
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#define GS_sig(context) ((context)->sc_gs)
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#define SS_sig(context) ((context)->sc_ss)
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#define TRAP_sig(context) ((context)->sc_trapno)
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#define ERROR_sig(context) ((context)->sc_err)
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#define EFL_sig(context) ((context)->sc_eflags)
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#define EIP_sig(context) ((context)->sc_eip)
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#define ESP_sig(context) ((context)->sc_esp)
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#define FPU_sig(context) NULL /* FIXME */
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#define FPUX_sig(context) NULL /* FIXME */
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#define XState_sig(context) NULL /* FIXME */
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#define T_MCHK T_MACHK
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#define T_XMMFLT T_XFTRAP
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#elif defined(__svr4__) || defined(_SCO_DS) || defined(__sun)
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#if defined(_SCO_DS) || defined(__sun)
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#include <sys/regset.h>
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#endif
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#ifdef _SCO_DS
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#define gregs regs
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#endif
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#define EAX_sig(context) ((context)->uc_mcontext.gregs[EAX])
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#define EBX_sig(context) ((context)->uc_mcontext.gregs[EBX])
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#define ECX_sig(context) ((context)->uc_mcontext.gregs[ECX])
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#define EDX_sig(context) ((context)->uc_mcontext.gregs[EDX])
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#define ESI_sig(context) ((context)->uc_mcontext.gregs[ESI])
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#define EDI_sig(context) ((context)->uc_mcontext.gregs[EDI])
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#define EBP_sig(context) ((context)->uc_mcontext.gregs[EBP])
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#define CS_sig(context) ((context)->uc_mcontext.gregs[CS])
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#define DS_sig(context) ((context)->uc_mcontext.gregs[DS])
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#define ES_sig(context) ((context)->uc_mcontext.gregs[ES])
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#define SS_sig(context) ((context)->uc_mcontext.gregs[SS])
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#define FS_sig(context) ((context)->uc_mcontext.gregs[FS])
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#define GS_sig(context) ((context)->uc_mcontext.gregs[GS])
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#define EFL_sig(context) ((context)->uc_mcontext.gregs[EFL])
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#define EIP_sig(context) ((context)->uc_mcontext.gregs[EIP])
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#ifdef UESP
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#define ESP_sig(context) ((context)->uc_mcontext.gregs[UESP])
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#elif defined(R_ESP)
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#define ESP_sig(context) ((context)->uc_mcontext.gregs[R_ESP])
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#else
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#define ESP_sig(context) ((context)->uc_mcontext.gregs[ESP])
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#endif
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#define ERROR_sig(context) ((context)->uc_mcontext.gregs[ERR])
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#define TRAP_sig(context) ((context)->uc_mcontext.gregs[TRAPNO])
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#define FPU_sig(context) NULL /* FIXME */
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#define FPUX_sig(context) NULL /* FIXME */
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#define XState_sig(context) NULL /* FIXME */
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#elif defined (__APPLE__)
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#include <i386/user_ldt.h>
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/* work around silly renaming of struct members in OS X 10.5 */
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#if __DARWIN_UNIX03 && defined(_STRUCT_X86_EXCEPTION_STATE32)
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#define EAX_sig(context) ((context)->uc_mcontext->__ss.__eax)
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#define EBX_sig(context) ((context)->uc_mcontext->__ss.__ebx)
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#define ECX_sig(context) ((context)->uc_mcontext->__ss.__ecx)
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#define EDX_sig(context) ((context)->uc_mcontext->__ss.__edx)
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#define ESI_sig(context) ((context)->uc_mcontext->__ss.__esi)
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#define EDI_sig(context) ((context)->uc_mcontext->__ss.__edi)
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#define EBP_sig(context) ((context)->uc_mcontext->__ss.__ebp)
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#define CS_sig(context) ((context)->uc_mcontext->__ss.__cs)
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#define DS_sig(context) ((context)->uc_mcontext->__ss.__ds)
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#define ES_sig(context) ((context)->uc_mcontext->__ss.__es)
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#define FS_sig(context) ((context)->uc_mcontext->__ss.__fs)
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#define GS_sig(context) ((context)->uc_mcontext->__ss.__gs)
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#define SS_sig(context) ((context)->uc_mcontext->__ss.__ss)
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#define EFL_sig(context) ((context)->uc_mcontext->__ss.__eflags)
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#define EIP_sig(context) (*((unsigned long*)&(context)->uc_mcontext->__ss.__eip))
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#define ESP_sig(context) (*((unsigned long*)&(context)->uc_mcontext->__ss.__esp))
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#define TRAP_sig(context) ((context)->uc_mcontext->__es.__trapno)
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#define ERROR_sig(context) ((context)->uc_mcontext->__es.__err)
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#define FPU_sig(context) NULL
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#define FPUX_sig(context) ((XSAVE_FORMAT *)&(context)->uc_mcontext->__fs.__fpu_fcw)
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#define XState_sig(context) NULL /* FIXME */
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#else
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#define EAX_sig(context) ((context)->uc_mcontext->ss.eax)
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#define EBX_sig(context) ((context)->uc_mcontext->ss.ebx)
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#define ECX_sig(context) ((context)->uc_mcontext->ss.ecx)
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#define EDX_sig(context) ((context)->uc_mcontext->ss.edx)
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#define ESI_sig(context) ((context)->uc_mcontext->ss.esi)
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#define EDI_sig(context) ((context)->uc_mcontext->ss.edi)
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#define EBP_sig(context) ((context)->uc_mcontext->ss.ebp)
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#define CS_sig(context) ((context)->uc_mcontext->ss.cs)
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#define DS_sig(context) ((context)->uc_mcontext->ss.ds)
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#define ES_sig(context) ((context)->uc_mcontext->ss.es)
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#define FS_sig(context) ((context)->uc_mcontext->ss.fs)
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#define GS_sig(context) ((context)->uc_mcontext->ss.gs)
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#define SS_sig(context) ((context)->uc_mcontext->ss.ss)
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#define EFL_sig(context) ((context)->uc_mcontext->ss.eflags)
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#define EIP_sig(context) (*((unsigned long*)&(context)->uc_mcontext->ss.eip))
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#define ESP_sig(context) (*((unsigned long*)&(context)->uc_mcontext->ss.esp))
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#define TRAP_sig(context) ((context)->uc_mcontext->es.trapno)
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#define ERROR_sig(context) ((context)->uc_mcontext->es.err)
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#define FPU_sig(context) NULL
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#define FPUX_sig(context) ((XSAVE_FORMAT *)&(context)->uc_mcontext->fs.fpu_fcw)
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#define XState_sig(context) NULL /* FIXME */
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#endif
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#elif defined(__NetBSD__)
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#include <machine/segments.h>
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#include <machine/sysarch.h>
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#define EAX_sig(context) ((context)->uc_mcontext.__gregs[_REG_EAX])
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#define EBX_sig(context) ((context)->uc_mcontext.__gregs[_REG_EBX])
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#define ECX_sig(context) ((context)->uc_mcontext.__gregs[_REG_ECX])
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#define EDX_sig(context) ((context)->uc_mcontext.__gregs[_REG_EDX])
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#define ESI_sig(context) ((context)->uc_mcontext.__gregs[_REG_ESI])
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#define EDI_sig(context) ((context)->uc_mcontext.__gregs[_REG_EDI])
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#define EBP_sig(context) ((context)->uc_mcontext.__gregs[_REG_EBP])
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#define ESP_sig(context) _UC_MACHINE_SP(context)
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#define CS_sig(context) ((context)->uc_mcontext.__gregs[_REG_CS])
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#define DS_sig(context) ((context)->uc_mcontext.__gregs[_REG_DS])
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#define ES_sig(context) ((context)->uc_mcontext.__gregs[_REG_ES])
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#define SS_sig(context) ((context)->uc_mcontext.__gregs[_REG_SS])
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#define FS_sig(context) ((context)->uc_mcontext.__gregs[_REG_FS])
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#define GS_sig(context) ((context)->uc_mcontext.__gregs[_REG_GS])
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#define EFL_sig(context) ((context)->uc_mcontext.__gregs[_REG_EFL])
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#define EIP_sig(context) _UC_MACHINE_PC(context)
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#define TRAP_sig(context) ((context)->uc_mcontext.__gregs[_REG_TRAPNO])
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#define ERROR_sig(context) ((context)->uc_mcontext.__gregs[_REG_ERR])
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#define FPU_sig(context) NULL
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#define FPUX_sig(context) ((XSAVE_FORMAT *)&((context)->uc_mcontext.__fpregs))
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#define XState_sig(context) NULL /* FIXME */
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#define T_MCHK T_MCA
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#define T_XMMFLT T_XMM
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#elif defined(__GNU__)
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#include <mach/i386/mach_i386.h>
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#include <mach/mach_traps.h>
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#define EAX_sig(context) ((context)->uc_mcontext.gregs[REG_EAX])
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#define EBX_sig(context) ((context)->uc_mcontext.gregs[REG_EBX])
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#define ECX_sig(context) ((context)->uc_mcontext.gregs[REG_ECX])
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#define EDX_sig(context) ((context)->uc_mcontext.gregs[REG_EDX])
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#define ESI_sig(context) ((context)->uc_mcontext.gregs[REG_ESI])
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#define EDI_sig(context) ((context)->uc_mcontext.gregs[REG_EDI])
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#define EBP_sig(context) ((context)->uc_mcontext.gregs[REG_EBP])
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#define ESP_sig(context) ((context)->uc_mcontext.gregs[REG_ESP])
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#define CS_sig(context) ((context)->uc_mcontext.gregs[REG_CS])
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#define DS_sig(context) ((context)->uc_mcontext.gregs[REG_DS])
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#define ES_sig(context) ((context)->uc_mcontext.gregs[REG_ES])
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#define SS_sig(context) ((context)->uc_mcontext.gregs[REG_SS])
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#define FS_sig(context) ((context)->uc_mcontext.gregs[REG_FS])
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#define GS_sig(context) ((context)->uc_mcontext.gregs[REG_GS])
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#define EFL_sig(context) ((context)->uc_mcontext.gregs[REG_EFL])
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#define EIP_sig(context) ((context)->uc_mcontext.gregs[REG_EIP])
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#define TRAP_sig(context) ((context)->uc_mcontext.gregs[REG_TRAPNO])
|
|
#define ERROR_sig(context) ((context)->uc_mcontext.gregs[REG_ERR])
|
|
|
|
#define FPU_sig(context) ((FLOATING_SAVE_AREA *)&(context)->uc_mcontext.fpregs.fp_reg_set.fpchip_state)
|
|
#define FPUX_sig(context) NULL
|
|
#define XState_sig(context) NULL /* FIXME */
|
|
|
|
#else
|
|
#error You must define the signal context functions for your platform
|
|
#endif /* linux */
|
|
|
|
static ULONG first_ldt_entry = 32;
|
|
|
|
enum i386_trap_code
|
|
{
|
|
#if defined(__FreeBSD__) || defined (__FreeBSD_kernel__) || defined(__NetBSD__) || defined(__OpenBSD__) || defined(__DragonFly__)
|
|
TRAP_x86_DIVIDE = T_DIVIDE, /* Division by zero exception */
|
|
TRAP_x86_TRCTRAP = T_TRCTRAP, /* Single-step exception */
|
|
TRAP_x86_NMI = T_NMI, /* NMI interrupt */
|
|
TRAP_x86_BPTFLT = T_BPTFLT, /* Breakpoint exception */
|
|
TRAP_x86_OFLOW = T_OFLOW, /* Overflow exception */
|
|
TRAP_x86_BOUND = T_BOUND, /* Bound range exception */
|
|
TRAP_x86_PRIVINFLT = T_PRIVINFLT, /* Invalid opcode exception */
|
|
TRAP_x86_DNA = T_DNA, /* Device not available exception */
|
|
TRAP_x86_DOUBLEFLT = T_DOUBLEFLT, /* Double fault exception */
|
|
TRAP_x86_FPOPFLT = T_FPOPFLT, /* Coprocessor segment overrun */
|
|
TRAP_x86_TSSFLT = T_TSSFLT, /* Invalid TSS exception */
|
|
TRAP_x86_SEGNPFLT = T_SEGNPFLT, /* Segment not present exception */
|
|
TRAP_x86_STKFLT = T_STKFLT, /* Stack fault */
|
|
TRAP_x86_PROTFLT = T_PROTFLT, /* General protection fault */
|
|
TRAP_x86_PAGEFLT = T_PAGEFLT, /* Page fault */
|
|
TRAP_x86_ARITHTRAP = T_ARITHTRAP, /* Floating point exception */
|
|
TRAP_x86_ALIGNFLT = T_ALIGNFLT, /* Alignment check exception */
|
|
TRAP_x86_MCHK = T_MCHK, /* Machine check exception */
|
|
TRAP_x86_CACHEFLT = T_XMMFLT /* Cache flush exception */
|
|
#else
|
|
TRAP_x86_DIVIDE = 0, /* Division by zero exception */
|
|
TRAP_x86_TRCTRAP = 1, /* Single-step exception */
|
|
TRAP_x86_NMI = 2, /* NMI interrupt */
|
|
TRAP_x86_BPTFLT = 3, /* Breakpoint exception */
|
|
TRAP_x86_OFLOW = 4, /* Overflow exception */
|
|
TRAP_x86_BOUND = 5, /* Bound range exception */
|
|
TRAP_x86_PRIVINFLT = 6, /* Invalid opcode exception */
|
|
TRAP_x86_DNA = 7, /* Device not available exception */
|
|
TRAP_x86_DOUBLEFLT = 8, /* Double fault exception */
|
|
TRAP_x86_FPOPFLT = 9, /* Coprocessor segment overrun */
|
|
TRAP_x86_TSSFLT = 10, /* Invalid TSS exception */
|
|
TRAP_x86_SEGNPFLT = 11, /* Segment not present exception */
|
|
TRAP_x86_STKFLT = 12, /* Stack fault */
|
|
TRAP_x86_PROTFLT = 13, /* General protection fault */
|
|
TRAP_x86_PAGEFLT = 14, /* Page fault */
|
|
TRAP_x86_ARITHTRAP = 16, /* Floating point exception */
|
|
TRAP_x86_ALIGNFLT = 17, /* Alignment check exception */
|
|
TRAP_x86_MCHK = 18, /* Machine check exception */
|
|
TRAP_x86_CACHEFLT = 19 /* SIMD exception (via SIGFPE) if CPU is SSE capable
|
|
otherwise Cache flush exception (via SIGSEV) */
|
|
#endif
|
|
};
|
|
|
|
struct syscall_frame
|
|
{
|
|
DWORD edi;
|
|
DWORD esi;
|
|
DWORD ebx;
|
|
DWORD ebp;
|
|
DWORD thunk_addr;
|
|
DWORD ret_addr;
|
|
};
|
|
|
|
struct x86_thread_data
|
|
{
|
|
DWORD fs; /* 1d4 TEB selector */
|
|
DWORD gs; /* 1d8 libc selector; update winebuild if you move this! */
|
|
DWORD dr0; /* 1dc debug registers */
|
|
DWORD dr1; /* 1e0 */
|
|
DWORD dr2; /* 1e4 */
|
|
DWORD dr3; /* 1e8 */
|
|
DWORD dr6; /* 1ec */
|
|
DWORD dr7; /* 1f0 */
|
|
void *exit_frame; /* 1f4 exit frame pointer */
|
|
struct syscall_frame *syscall_frame; /* 1f8 frame pointer on syscall entry */
|
|
};
|
|
|
|
C_ASSERT( sizeof(struct x86_thread_data) <= sizeof(((struct ntdll_thread_data *)0)->cpu_data) );
|
|
C_ASSERT( offsetof( TEB, GdiTebBatch ) + offsetof( struct x86_thread_data, gs ) == 0x1d8 );
|
|
C_ASSERT( offsetof( TEB, GdiTebBatch ) + offsetof( struct x86_thread_data, exit_frame ) == 0x1f4 );
|
|
C_ASSERT( offsetof( TEB, GdiTebBatch ) + offsetof( struct x86_thread_data, syscall_frame ) == 0x1f8 );
|
|
|
|
static inline struct x86_thread_data *x86_thread_data(void)
|
|
{
|
|
return (struct x86_thread_data *)ntdll_get_thread_data()->cpu_data;
|
|
}
|
|
|
|
static inline WORD get_cs(void) { WORD res; __asm__( "movw %%cs,%0" : "=r" (res) ); return res; }
|
|
static inline WORD get_ds(void) { WORD res; __asm__( "movw %%ds,%0" : "=r" (res) ); return res; }
|
|
static inline WORD get_fs(void) { WORD res; __asm__( "movw %%fs,%0" : "=r" (res) ); return res; }
|
|
static inline WORD get_gs(void) { WORD res; __asm__( "movw %%gs,%0" : "=r" (res) ); return res; }
|
|
static inline void set_fs( WORD val ) { __asm__( "mov %0,%%fs" :: "r" (val)); }
|
|
static inline void set_gs( WORD val ) { __asm__( "mov %0,%%gs" :: "r" (val)); }
|
|
|
|
|
|
/***********************************************************************
|
|
* unwind_builtin_dll
|
|
*/
|
|
NTSTATUS CDECL unwind_builtin_dll( ULONG type, struct _DISPATCHER_CONTEXT *dispatch, CONTEXT *context )
|
|
{
|
|
return STATUS_UNSUCCESSFUL;
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* is_gdt_sel
|
|
*/
|
|
static inline int is_gdt_sel( WORD sel )
|
|
{
|
|
return !(sel & 4);
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* ldt_is_system
|
|
*/
|
|
static inline int ldt_is_system( WORD sel )
|
|
{
|
|
return is_gdt_sel( sel ) || ((sel >> 3) < first_ldt_entry);
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* get_current_teb
|
|
*
|
|
* Get the current teb based on the stack pointer.
|
|
*/
|
|
static inline TEB *get_current_teb(void)
|
|
{
|
|
unsigned long esp;
|
|
__asm__("movl %%esp,%0" : "=g" (esp) );
|
|
return (TEB *)((esp & ~signal_stack_mask) + teb_offset);
|
|
}
|
|
|
|
|
|
#ifdef __sun
|
|
|
|
/* We have to workaround two Solaris breakages:
|
|
* - Solaris doesn't restore %ds and %es before calling the signal handler so exceptions in 16-bit
|
|
* code crash badly.
|
|
* - Solaris inserts a libc trampoline to call our handler, but the trampoline expects that registers
|
|
* are setup correctly. So we need to insert our own trampoline below the libc trampoline to set %gs.
|
|
*/
|
|
|
|
extern int sigaction_syscall( int sig, const struct sigaction *new, struct sigaction *old );
|
|
__ASM_GLOBAL_FUNC( sigaction_syscall,
|
|
"movl $0x62,%eax\n\t"
|
|
"int $0x91\n\t"
|
|
"ret" )
|
|
|
|
/* assume the same libc handler is used for all signals */
|
|
static void (*libc_sigacthandler)( int signal, siginfo_t *siginfo, void *context );
|
|
|
|
static void wine_sigacthandler( int signal, siginfo_t *siginfo, void *sigcontext )
|
|
{
|
|
struct x86_thread_data *thread_data;
|
|
|
|
__asm__ __volatile__("mov %ss,%ax; mov %ax,%ds; mov %ax,%es");
|
|
|
|
thread_data = (struct x86_thread_data *)get_current_teb()->GdiTebBatch;
|
|
set_fs( thread_data->fs );
|
|
set_gs( thread_data->gs );
|
|
|
|
libc_sigacthandler( signal, siginfo, sigcontext );
|
|
}
|
|
|
|
static int solaris_sigaction( int sig, const struct sigaction *new, struct sigaction *old )
|
|
{
|
|
struct sigaction real_act;
|
|
|
|
if (sigaction( sig, new, old ) == -1) return -1;
|
|
|
|
/* retrieve the real handler and flags with a direct syscall */
|
|
sigaction_syscall( sig, NULL, &real_act );
|
|
libc_sigacthandler = real_act.sa_sigaction;
|
|
real_act.sa_sigaction = wine_sigacthandler;
|
|
sigaction_syscall( sig, &real_act, NULL );
|
|
return 0;
|
|
}
|
|
#define sigaction(sig,new,old) solaris_sigaction(sig,new,old)
|
|
|
|
#endif
|
|
|
|
extern void clear_alignment_flag(void);
|
|
__ASM_GLOBAL_FUNC( clear_alignment_flag,
|
|
"pushfl\n\t"
|
|
__ASM_CFI(".cfi_adjust_cfa_offset 4\n\t")
|
|
"andl $~0x40000,(%esp)\n\t"
|
|
"popfl\n\t"
|
|
__ASM_CFI(".cfi_adjust_cfa_offset -4\n\t")
|
|
"ret" )
|
|
|
|
|
|
/***********************************************************************
|
|
* init_handler
|
|
*
|
|
* Handler initialization when the full context is not needed.
|
|
* Return the stack pointer to use for pushing the exception data.
|
|
*/
|
|
static inline void *init_handler( const ucontext_t *sigcontext )
|
|
{
|
|
TEB *teb = get_current_teb();
|
|
|
|
clear_alignment_flag();
|
|
|
|
#ifndef __sun /* see above for Solaris handling */
|
|
{
|
|
struct x86_thread_data *thread_data = (struct x86_thread_data *)&teb->GdiTebBatch;
|
|
set_fs( thread_data->fs );
|
|
set_gs( thread_data->gs );
|
|
}
|
|
#endif
|
|
|
|
if (!ldt_is_system(CS_sig(sigcontext)) || !ldt_is_system(SS_sig(sigcontext))) /* 16-bit mode */
|
|
{
|
|
/*
|
|
* Win16 or DOS protected mode. Note that during switch
|
|
* from 16-bit mode to linear mode, CS may be set to system
|
|
* segment before FS is restored. Fortunately, in this case
|
|
* SS is still non-system segment. This is why both CS and SS
|
|
* are checked.
|
|
*/
|
|
return teb->WOW32Reserved;
|
|
}
|
|
return (void *)(ESP_sig(sigcontext) & ~3);
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* save_fpu
|
|
*
|
|
* Save the thread FPU context.
|
|
*/
|
|
static inline void save_fpu( CONTEXT *context )
|
|
{
|
|
struct
|
|
{
|
|
DWORD ControlWord;
|
|
DWORD StatusWord;
|
|
DWORD TagWord;
|
|
DWORD ErrorOffset;
|
|
DWORD ErrorSelector;
|
|
DWORD DataOffset;
|
|
DWORD DataSelector;
|
|
}
|
|
float_status;
|
|
|
|
context->ContextFlags |= CONTEXT_FLOATING_POINT;
|
|
__asm__ __volatile__( "fnsave %0; fwait" : "=m" (context->FloatSave) );
|
|
|
|
/* Reset unmasked exceptions status to avoid firing an exception. */
|
|
memcpy(&float_status, &context->FloatSave, sizeof(float_status));
|
|
float_status.StatusWord &= float_status.ControlWord | 0xffffff80;
|
|
|
|
__asm__ __volatile__( "fldenv %0" : : "m" (float_status) );
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* save_fpux
|
|
*
|
|
* Save the thread FPU extended context.
|
|
*/
|
|
static inline void save_fpux( CONTEXT *context )
|
|
{
|
|
/* we have to enforce alignment by hand */
|
|
char buffer[sizeof(XSAVE_FORMAT) + 16];
|
|
XSAVE_FORMAT *state = (XSAVE_FORMAT *)(((ULONG_PTR)buffer + 15) & ~15);
|
|
|
|
context->ContextFlags |= CONTEXT_EXTENDED_REGISTERS;
|
|
__asm__ __volatile__( "fxsave %0" : "=m" (*state) );
|
|
memcpy( context->ExtendedRegisters, state, sizeof(*state) );
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* save_xstate
|
|
*
|
|
* Save the XState context
|
|
*/
|
|
static inline NTSTATUS save_xstate( CONTEXT *context )
|
|
{
|
|
CONTEXT_EX *context_ex = (CONTEXT_EX *)(context + 1);
|
|
DECLSPEC_ALIGN(64) struct
|
|
{
|
|
XSAVE_FORMAT xsave;
|
|
XSTATE xstate;
|
|
}
|
|
xsave_area;
|
|
XSTATE *xs;
|
|
|
|
if (!(user_shared_data->XState.EnabledFeatures && (xs = xstate_from_context( context ))))
|
|
return STATUS_SUCCESS;
|
|
|
|
if (context_ex->XState.Length < offsetof(XSTATE, YmmContext)
|
|
|| context_ex->XState.Length > sizeof(XSTATE))
|
|
return STATUS_INVALID_PARAMETER;
|
|
|
|
if (user_shared_data->XState.CompactionEnabled)
|
|
{
|
|
/* xsavec doesn't use anything from the save area. */
|
|
__asm__ volatile( "xsavec %0" : "=m"(xsave_area)
|
|
: "a" ((unsigned int)(xs->CompactionMask & (1 << XSTATE_AVX))), "d" (0) );
|
|
}
|
|
else
|
|
{
|
|
/* xsave preserves those bits in the mask which are not in EDX:EAX, so zero it. */
|
|
xsave_area.xstate.Mask = xsave_area.xstate.CompactionMask = 0;
|
|
__asm__ volatile( "xsave %0" : "=m"(xsave_area)
|
|
: "a" ((unsigned int)(xs->Mask & (1 << XSTATE_AVX))), "d" (0) );
|
|
}
|
|
|
|
memcpy(xs, &xsave_area.xstate, offsetof(XSTATE, YmmContext));
|
|
if (xs->Mask & (1 << XSTATE_AVX))
|
|
{
|
|
if (context_ex->XState.Length < sizeof(XSTATE))
|
|
return STATUS_BUFFER_OVERFLOW;
|
|
|
|
memcpy(&xs->YmmContext, &xsave_area.xstate.YmmContext, sizeof(xs->YmmContext));
|
|
}
|
|
|
|
return STATUS_SUCCESS;
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* restore_fpu
|
|
*
|
|
* Restore the x87 FPU context
|
|
*/
|
|
static inline void restore_fpu( const CONTEXT *context )
|
|
{
|
|
FLOATING_SAVE_AREA float_status = context->FloatSave;
|
|
/* reset the current interrupt status */
|
|
float_status.StatusWord &= float_status.ControlWord | 0xffffff80;
|
|
__asm__ __volatile__( "frstor %0; fwait" : : "m" (float_status) );
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* restore_fpux
|
|
*
|
|
* Restore the FPU extended context
|
|
*/
|
|
static inline void restore_fpux( const CONTEXT *context )
|
|
{
|
|
/* we have to enforce alignment by hand */
|
|
char buffer[sizeof(XSAVE_FORMAT) + 16];
|
|
XSAVE_FORMAT *state = (XSAVE_FORMAT *)(((ULONG_PTR)buffer + 15) & ~15);
|
|
|
|
memcpy( state, context->ExtendedRegisters, sizeof(*state) );
|
|
/* reset the current interrupt status */
|
|
state->StatusWord &= state->ControlWord | 0xff80;
|
|
__asm__ __volatile__( "fxrstor %0" : : "m" (*state) );
|
|
}
|
|
|
|
/***********************************************************************
|
|
* restore_xstate
|
|
*
|
|
* Restore the XState context
|
|
*/
|
|
static inline void restore_xstate( const CONTEXT *context )
|
|
{
|
|
XSAVE_FORMAT *xrstor_base;
|
|
XSTATE *xs;
|
|
|
|
if (!(xs = xstate_from_context( context )))
|
|
return;
|
|
|
|
xrstor_base = (XSAVE_FORMAT *)xs - 1;
|
|
|
|
if (!(xs->CompactionMask & ((ULONG64)1 << 63)))
|
|
{
|
|
/* Non-compacted xrstor will load Mxcsr regardless of the specified mask. Loading garbage there
|
|
* may lead to fault. FPUX state should be restored by now, so we can reuse some space in
|
|
* ExtendedRegisters. */
|
|
XSAVE_FORMAT *fpux = (XSAVE_FORMAT *)context->ExtendedRegisters;
|
|
DWORD mxcsr, mxcsr_mask;
|
|
|
|
mxcsr = fpux->MxCsr;
|
|
mxcsr_mask = fpux->MxCsr_Mask;
|
|
|
|
assert( (void *)&xrstor_base->MxCsr > (void *)context->ExtendedRegisters );
|
|
xrstor_base->MxCsr = mxcsr;
|
|
xrstor_base->MxCsr_Mask = mxcsr_mask;
|
|
}
|
|
__asm__ volatile( "xrstor %0" : : "m"(*xrstor_base), "a" (4), "d" (0) );
|
|
}
|
|
|
|
/***********************************************************************
|
|
* fpux_to_fpu
|
|
*
|
|
* Build a standard FPU context from an extended one.
|
|
*/
|
|
static void fpux_to_fpu( FLOATING_SAVE_AREA *fpu, const XSAVE_FORMAT *fpux )
|
|
{
|
|
unsigned int i, tag, stack_top;
|
|
|
|
fpu->ControlWord = fpux->ControlWord | 0xffff0000;
|
|
fpu->StatusWord = fpux->StatusWord | 0xffff0000;
|
|
fpu->ErrorOffset = fpux->ErrorOffset;
|
|
fpu->ErrorSelector = fpux->ErrorSelector | (fpux->ErrorOpcode << 16);
|
|
fpu->DataOffset = fpux->DataOffset;
|
|
fpu->DataSelector = fpux->DataSelector;
|
|
fpu->Cr0NpxState = fpux->StatusWord | 0xffff0000;
|
|
|
|
stack_top = (fpux->StatusWord >> 11) & 7;
|
|
fpu->TagWord = 0xffff0000;
|
|
for (i = 0; i < 8; i++)
|
|
{
|
|
memcpy( &fpu->RegisterArea[10 * i], &fpux->FloatRegisters[i], 10 );
|
|
if (!(fpux->TagWord & (1 << i))) tag = 3; /* empty */
|
|
else
|
|
{
|
|
const M128A *reg = &fpux->FloatRegisters[(i - stack_top) & 7];
|
|
if ((reg->High & 0x7fff) == 0x7fff) /* exponent all ones */
|
|
{
|
|
tag = 2; /* special */
|
|
}
|
|
else if (!(reg->High & 0x7fff)) /* exponent all zeroes */
|
|
{
|
|
if (reg->Low) tag = 2; /* special */
|
|
else tag = 1; /* zero */
|
|
}
|
|
else
|
|
{
|
|
if (reg->Low >> 63) tag = 0; /* valid */
|
|
else tag = 2; /* special */
|
|
}
|
|
}
|
|
fpu->TagWord |= tag << (2 * i);
|
|
}
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* save_context
|
|
*
|
|
* Build a context structure from the signal info.
|
|
*/
|
|
static inline void save_context( struct xcontext *xcontext, const ucontext_t *sigcontext )
|
|
{
|
|
FLOATING_SAVE_AREA *fpu = FPU_sig(sigcontext);
|
|
XSAVE_FORMAT *fpux = FPUX_sig(sigcontext);
|
|
CONTEXT *context = &xcontext->c;
|
|
|
|
memset(context, 0, sizeof(*context));
|
|
context->ContextFlags = CONTEXT_FULL | CONTEXT_DEBUG_REGISTERS;
|
|
context->Eax = EAX_sig(sigcontext);
|
|
context->Ebx = EBX_sig(sigcontext);
|
|
context->Ecx = ECX_sig(sigcontext);
|
|
context->Edx = EDX_sig(sigcontext);
|
|
context->Esi = ESI_sig(sigcontext);
|
|
context->Edi = EDI_sig(sigcontext);
|
|
context->Ebp = EBP_sig(sigcontext);
|
|
context->EFlags = EFL_sig(sigcontext);
|
|
context->Eip = EIP_sig(sigcontext);
|
|
context->Esp = ESP_sig(sigcontext);
|
|
context->SegCs = LOWORD(CS_sig(sigcontext));
|
|
context->SegDs = LOWORD(DS_sig(sigcontext));
|
|
context->SegEs = LOWORD(ES_sig(sigcontext));
|
|
context->SegFs = LOWORD(FS_sig(sigcontext));
|
|
context->SegGs = LOWORD(GS_sig(sigcontext));
|
|
context->SegSs = LOWORD(SS_sig(sigcontext));
|
|
context->Dr0 = x86_thread_data()->dr0;
|
|
context->Dr1 = x86_thread_data()->dr1;
|
|
context->Dr2 = x86_thread_data()->dr2;
|
|
context->Dr3 = x86_thread_data()->dr3;
|
|
context->Dr6 = x86_thread_data()->dr6;
|
|
context->Dr7 = x86_thread_data()->dr7;
|
|
|
|
if (fpu)
|
|
{
|
|
context->ContextFlags |= CONTEXT_FLOATING_POINT;
|
|
context->FloatSave = *fpu;
|
|
}
|
|
if (fpux)
|
|
{
|
|
XSTATE *xs;
|
|
|
|
context->ContextFlags |= CONTEXT_FLOATING_POINT | CONTEXT_EXTENDED_REGISTERS;
|
|
memcpy( context->ExtendedRegisters, fpux, sizeof(*fpux) );
|
|
if (!fpu) fpux_to_fpu( &context->FloatSave, fpux );
|
|
if ((xs = XState_sig(fpux)))
|
|
{
|
|
context_init_xstate( context, xs );
|
|
xcontext->host_compaction_mask = xs->CompactionMask;
|
|
}
|
|
}
|
|
if (!fpu && !fpux) save_fpu( context );
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* restore_context
|
|
*
|
|
* Restore the signal info from the context.
|
|
*/
|
|
static inline void restore_context( const struct xcontext *xcontext, ucontext_t *sigcontext )
|
|
{
|
|
FLOATING_SAVE_AREA *fpu = FPU_sig(sigcontext);
|
|
XSAVE_FORMAT *fpux = FPUX_sig(sigcontext);
|
|
const CONTEXT *context = &xcontext->c;
|
|
|
|
x86_thread_data()->dr0 = context->Dr0;
|
|
x86_thread_data()->dr1 = context->Dr1;
|
|
x86_thread_data()->dr2 = context->Dr2;
|
|
x86_thread_data()->dr3 = context->Dr3;
|
|
x86_thread_data()->dr6 = context->Dr6;
|
|
x86_thread_data()->dr7 = context->Dr7;
|
|
EAX_sig(sigcontext) = context->Eax;
|
|
EBX_sig(sigcontext) = context->Ebx;
|
|
ECX_sig(sigcontext) = context->Ecx;
|
|
EDX_sig(sigcontext) = context->Edx;
|
|
ESI_sig(sigcontext) = context->Esi;
|
|
EDI_sig(sigcontext) = context->Edi;
|
|
EBP_sig(sigcontext) = context->Ebp;
|
|
EFL_sig(sigcontext) = context->EFlags;
|
|
EIP_sig(sigcontext) = context->Eip;
|
|
ESP_sig(sigcontext) = context->Esp;
|
|
CS_sig(sigcontext) = context->SegCs;
|
|
DS_sig(sigcontext) = context->SegDs;
|
|
ES_sig(sigcontext) = context->SegEs;
|
|
FS_sig(sigcontext) = context->SegFs;
|
|
GS_sig(sigcontext) = context->SegGs;
|
|
SS_sig(sigcontext) = context->SegSs;
|
|
|
|
if (fpu) *fpu = context->FloatSave;
|
|
if (fpux)
|
|
{
|
|
XSTATE *src_xs, *dst_xs;
|
|
|
|
memcpy( fpux, context->ExtendedRegisters, sizeof(*fpux) );
|
|
|
|
if ((dst_xs = XState_sig(fpux)) && (src_xs = xstate_from_context( context )))
|
|
{
|
|
memcpy( &dst_xs->YmmContext, &src_xs->YmmContext, sizeof(dst_xs->YmmContext) );
|
|
dst_xs->Mask |= src_xs->Mask;
|
|
dst_xs->CompactionMask = xcontext->host_compaction_mask;
|
|
}
|
|
}
|
|
if (!fpu && !fpux) restore_fpu( context );
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* set_full_cpu_context
|
|
*
|
|
* Set the new CPU context.
|
|
*/
|
|
extern void set_full_cpu_context( const CONTEXT *context );
|
|
__ASM_GLOBAL_FUNC( set_full_cpu_context,
|
|
"movl $0,%fs:0x1f8\n\t" /* x86_thread_data()->syscall_frame = NULL */
|
|
"movl 4(%esp),%ecx\n\t"
|
|
"movw 0x8c(%ecx),%gs\n\t" /* SegGs */
|
|
"movw 0x90(%ecx),%fs\n\t" /* SegFs */
|
|
"movw 0x94(%ecx),%es\n\t" /* SegEs */
|
|
"movl 0x9c(%ecx),%edi\n\t" /* Edi */
|
|
"movl 0xa0(%ecx),%esi\n\t" /* Esi */
|
|
"movl 0xa4(%ecx),%ebx\n\t" /* Ebx */
|
|
"movl 0xb4(%ecx),%ebp\n\t" /* Ebp */
|
|
"movw %ss,%ax\n\t"
|
|
"cmpw 0xc8(%ecx),%ax\n\t" /* SegSs */
|
|
"jne 1f\n\t"
|
|
/* As soon as we have switched stacks the context structure could
|
|
* be invalid (when signal handlers are executed for example). Copy
|
|
* values on the target stack before changing ESP. */
|
|
"movl 0xc4(%ecx),%eax\n\t" /* Esp */
|
|
"leal -4*4(%eax),%eax\n\t"
|
|
"movl 0xc0(%ecx),%edx\n\t" /* EFlags */
|
|
"movl %edx,3*4(%eax)\n\t"
|
|
"movl 0xbc(%ecx),%edx\n\t" /* SegCs */
|
|
"movl %edx,2*4(%eax)\n\t"
|
|
"movl 0xb8(%ecx),%edx\n\t" /* Eip */
|
|
"movl %edx,1*4(%eax)\n\t"
|
|
"movl 0xb0(%ecx),%edx\n\t" /* Eax */
|
|
"movl %edx,0*4(%eax)\n\t"
|
|
"pushl 0x98(%ecx)\n\t" /* SegDs */
|
|
"movl 0xa8(%ecx),%edx\n\t" /* Edx */
|
|
"movl 0xac(%ecx),%ecx\n\t" /* Ecx */
|
|
"popl %ds\n\t"
|
|
"movl %eax,%esp\n\t"
|
|
"popl %eax\n\t"
|
|
"iret\n"
|
|
/* Restore the context when the stack segment changes. We can't use
|
|
* the same code as above because we do not know if the stack segment
|
|
* is 16 or 32 bit, and 'movl' will throw an exception when we try to
|
|
* access memory above the limit. */
|
|
"1:\n\t"
|
|
"movl 0xa8(%ecx),%edx\n\t" /* Edx */
|
|
"movl 0xb0(%ecx),%eax\n\t" /* Eax */
|
|
"movw 0xc8(%ecx),%ss\n\t" /* SegSs */
|
|
"movl 0xc4(%ecx),%esp\n\t" /* Esp */
|
|
"pushl 0xc0(%ecx)\n\t" /* EFlags */
|
|
"pushl 0xbc(%ecx)\n\t" /* SegCs */
|
|
"pushl 0xb8(%ecx)\n\t" /* Eip */
|
|
"pushl 0x98(%ecx)\n\t" /* SegDs */
|
|
"movl 0xac(%ecx),%ecx\n\t" /* Ecx */
|
|
"popl %ds\n\t"
|
|
"iret" )
|
|
|
|
|
|
/***********************************************************************
|
|
* get_server_context_flags
|
|
*
|
|
* Convert CPU-specific flags to generic server flags
|
|
*/
|
|
static unsigned int get_server_context_flags( DWORD flags )
|
|
{
|
|
unsigned int ret = 0;
|
|
|
|
flags &= ~CONTEXT_i386; /* get rid of CPU id */
|
|
if (flags & CONTEXT_CONTROL) ret |= SERVER_CTX_CONTROL;
|
|
if (flags & CONTEXT_INTEGER) ret |= SERVER_CTX_INTEGER;
|
|
if (flags & CONTEXT_SEGMENTS) ret |= SERVER_CTX_SEGMENTS;
|
|
if (flags & CONTEXT_FLOATING_POINT) ret |= SERVER_CTX_FLOATING_POINT;
|
|
if (flags & CONTEXT_DEBUG_REGISTERS) ret |= SERVER_CTX_DEBUG_REGISTERS;
|
|
if (flags & CONTEXT_EXTENDED_REGISTERS) ret |= SERVER_CTX_EXTENDED_REGISTERS;
|
|
if (flags & CONTEXT_XSTATE) ret |= SERVER_CTX_YMM_REGISTERS;
|
|
return ret;
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* context_to_server
|
|
*
|
|
* Convert a register context to the server format.
|
|
*/
|
|
NTSTATUS context_to_server( context_t *to, const CONTEXT *from )
|
|
{
|
|
DWORD flags = from->ContextFlags & ~CONTEXT_i386; /* get rid of CPU id */
|
|
|
|
memset( to, 0, sizeof(*to) );
|
|
to->cpu = CPU_x86;
|
|
|
|
if (flags & CONTEXT_CONTROL)
|
|
{
|
|
to->flags |= SERVER_CTX_CONTROL;
|
|
to->ctl.i386_regs.ebp = from->Ebp;
|
|
to->ctl.i386_regs.esp = from->Esp;
|
|
to->ctl.i386_regs.eip = from->Eip;
|
|
to->ctl.i386_regs.cs = from->SegCs;
|
|
to->ctl.i386_regs.ss = from->SegSs;
|
|
to->ctl.i386_regs.eflags = from->EFlags;
|
|
}
|
|
if (flags & CONTEXT_INTEGER)
|
|
{
|
|
to->flags |= SERVER_CTX_INTEGER;
|
|
to->integer.i386_regs.eax = from->Eax;
|
|
to->integer.i386_regs.ebx = from->Ebx;
|
|
to->integer.i386_regs.ecx = from->Ecx;
|
|
to->integer.i386_regs.edx = from->Edx;
|
|
to->integer.i386_regs.esi = from->Esi;
|
|
to->integer.i386_regs.edi = from->Edi;
|
|
}
|
|
if (flags & CONTEXT_SEGMENTS)
|
|
{
|
|
to->flags |= SERVER_CTX_SEGMENTS;
|
|
to->seg.i386_regs.ds = from->SegDs;
|
|
to->seg.i386_regs.es = from->SegEs;
|
|
to->seg.i386_regs.fs = from->SegFs;
|
|
to->seg.i386_regs.gs = from->SegGs;
|
|
}
|
|
if (flags & CONTEXT_FLOATING_POINT)
|
|
{
|
|
to->flags |= SERVER_CTX_FLOATING_POINT;
|
|
to->fp.i386_regs.ctrl = from->FloatSave.ControlWord;
|
|
to->fp.i386_regs.status = from->FloatSave.StatusWord;
|
|
to->fp.i386_regs.tag = from->FloatSave.TagWord;
|
|
to->fp.i386_regs.err_off = from->FloatSave.ErrorOffset;
|
|
to->fp.i386_regs.err_sel = from->FloatSave.ErrorSelector;
|
|
to->fp.i386_regs.data_off = from->FloatSave.DataOffset;
|
|
to->fp.i386_regs.data_sel = from->FloatSave.DataSelector;
|
|
to->fp.i386_regs.cr0npx = from->FloatSave.Cr0NpxState;
|
|
memcpy( to->fp.i386_regs.regs, from->FloatSave.RegisterArea, sizeof(to->fp.i386_regs.regs) );
|
|
}
|
|
if (flags & CONTEXT_DEBUG_REGISTERS)
|
|
{
|
|
to->flags |= SERVER_CTX_DEBUG_REGISTERS;
|
|
to->debug.i386_regs.dr0 = from->Dr0;
|
|
to->debug.i386_regs.dr1 = from->Dr1;
|
|
to->debug.i386_regs.dr2 = from->Dr2;
|
|
to->debug.i386_regs.dr3 = from->Dr3;
|
|
to->debug.i386_regs.dr6 = from->Dr6;
|
|
to->debug.i386_regs.dr7 = from->Dr7;
|
|
}
|
|
if (flags & CONTEXT_EXTENDED_REGISTERS)
|
|
{
|
|
to->flags |= SERVER_CTX_EXTENDED_REGISTERS;
|
|
memcpy( to->ext.i386_regs, from->ExtendedRegisters, sizeof(to->ext.i386_regs) );
|
|
}
|
|
xstate_to_server( to, xstate_from_context( from ) );
|
|
return STATUS_SUCCESS;
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* context_from_server
|
|
*
|
|
* Convert a register context from the server format.
|
|
*/
|
|
NTSTATUS context_from_server( CONTEXT *to, const context_t *from )
|
|
{
|
|
if (from->cpu != CPU_x86) return STATUS_INVALID_PARAMETER;
|
|
|
|
to->ContextFlags = CONTEXT_i386 | (to->ContextFlags & 0x40);
|
|
if (from->flags & SERVER_CTX_CONTROL)
|
|
{
|
|
to->ContextFlags |= CONTEXT_CONTROL;
|
|
to->Ebp = from->ctl.i386_regs.ebp;
|
|
to->Esp = from->ctl.i386_regs.esp;
|
|
to->Eip = from->ctl.i386_regs.eip;
|
|
to->SegCs = from->ctl.i386_regs.cs;
|
|
to->SegSs = from->ctl.i386_regs.ss;
|
|
to->EFlags = from->ctl.i386_regs.eflags;
|
|
}
|
|
if (from->flags & SERVER_CTX_INTEGER)
|
|
{
|
|
to->ContextFlags |= CONTEXT_INTEGER;
|
|
to->Eax = from->integer.i386_regs.eax;
|
|
to->Ebx = from->integer.i386_regs.ebx;
|
|
to->Ecx = from->integer.i386_regs.ecx;
|
|
to->Edx = from->integer.i386_regs.edx;
|
|
to->Esi = from->integer.i386_regs.esi;
|
|
to->Edi = from->integer.i386_regs.edi;
|
|
}
|
|
if (from->flags & SERVER_CTX_SEGMENTS)
|
|
{
|
|
to->ContextFlags |= CONTEXT_SEGMENTS;
|
|
to->SegDs = from->seg.i386_regs.ds;
|
|
to->SegEs = from->seg.i386_regs.es;
|
|
to->SegFs = from->seg.i386_regs.fs;
|
|
to->SegGs = from->seg.i386_regs.gs;
|
|
}
|
|
if (from->flags & SERVER_CTX_FLOATING_POINT)
|
|
{
|
|
to->ContextFlags |= CONTEXT_FLOATING_POINT;
|
|
to->FloatSave.ControlWord = from->fp.i386_regs.ctrl;
|
|
to->FloatSave.StatusWord = from->fp.i386_regs.status;
|
|
to->FloatSave.TagWord = from->fp.i386_regs.tag;
|
|
to->FloatSave.ErrorOffset = from->fp.i386_regs.err_off;
|
|
to->FloatSave.ErrorSelector = from->fp.i386_regs.err_sel;
|
|
to->FloatSave.DataOffset = from->fp.i386_regs.data_off;
|
|
to->FloatSave.DataSelector = from->fp.i386_regs.data_sel;
|
|
to->FloatSave.Cr0NpxState = from->fp.i386_regs.cr0npx;
|
|
memcpy( to->FloatSave.RegisterArea, from->fp.i386_regs.regs, sizeof(to->FloatSave.RegisterArea) );
|
|
}
|
|
if (from->flags & SERVER_CTX_DEBUG_REGISTERS)
|
|
{
|
|
to->ContextFlags |= CONTEXT_DEBUG_REGISTERS;
|
|
to->Dr0 = from->debug.i386_regs.dr0;
|
|
to->Dr1 = from->debug.i386_regs.dr1;
|
|
to->Dr2 = from->debug.i386_regs.dr2;
|
|
to->Dr3 = from->debug.i386_regs.dr3;
|
|
to->Dr6 = from->debug.i386_regs.dr6;
|
|
to->Dr7 = from->debug.i386_regs.dr7;
|
|
}
|
|
if (from->flags & SERVER_CTX_EXTENDED_REGISTERS)
|
|
{
|
|
to->ContextFlags |= CONTEXT_EXTENDED_REGISTERS;
|
|
memcpy( to->ExtendedRegisters, from->ext.i386_regs, sizeof(to->ExtendedRegisters) );
|
|
}
|
|
xstate_from_server( xstate_from_context( to ), from );
|
|
return STATUS_SUCCESS;
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* NtSetContextThread (NTDLL.@)
|
|
* ZwSetContextThread (NTDLL.@)
|
|
*/
|
|
NTSTATUS WINAPI NtSetContextThread( HANDLE handle, const CONTEXT *context )
|
|
{
|
|
NTSTATUS ret = STATUS_SUCCESS;
|
|
DWORD flags = context->ContextFlags & ~CONTEXT_i386;
|
|
BOOL self = (handle == GetCurrentThread());
|
|
|
|
/* debug registers require a server call */
|
|
if (self && (flags & CONTEXT_DEBUG_REGISTERS))
|
|
self = (x86_thread_data()->dr0 == context->Dr0 &&
|
|
x86_thread_data()->dr1 == context->Dr1 &&
|
|
x86_thread_data()->dr2 == context->Dr2 &&
|
|
x86_thread_data()->dr3 == context->Dr3 &&
|
|
x86_thread_data()->dr6 == context->Dr6 &&
|
|
x86_thread_data()->dr7 == context->Dr7);
|
|
|
|
if (!self)
|
|
{
|
|
context_t server_context;
|
|
context_to_server( &server_context, context );
|
|
ret = set_thread_context( handle, &server_context, &self );
|
|
if (ret || !self) return ret;
|
|
if (flags & CONTEXT_DEBUG_REGISTERS)
|
|
{
|
|
x86_thread_data()->dr0 = context->Dr0;
|
|
x86_thread_data()->dr1 = context->Dr1;
|
|
x86_thread_data()->dr2 = context->Dr2;
|
|
x86_thread_data()->dr3 = context->Dr3;
|
|
x86_thread_data()->dr6 = context->Dr6;
|
|
x86_thread_data()->dr7 = context->Dr7;
|
|
}
|
|
}
|
|
|
|
if (flags & CONTEXT_EXTENDED_REGISTERS) restore_fpux( context );
|
|
else if (flags & CONTEXT_FLOATING_POINT) restore_fpu( context );
|
|
|
|
restore_xstate( context );
|
|
|
|
if (flags & CONTEXT_FULL)
|
|
{
|
|
if (!(flags & CONTEXT_CONTROL))
|
|
FIXME( "setting partial context (%x) not supported\n", flags );
|
|
else if (flags & CONTEXT_SEGMENTS)
|
|
set_full_cpu_context( context );
|
|
else
|
|
{
|
|
CONTEXT newcontext = *context;
|
|
newcontext.SegDs = get_ds();
|
|
newcontext.SegEs = get_ds();
|
|
newcontext.SegFs = get_fs();
|
|
newcontext.SegGs = get_gs();
|
|
set_full_cpu_context( &newcontext );
|
|
}
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* NtGetContextThread (NTDLL.@)
|
|
* ZwGetContextThread (NTDLL.@)
|
|
*
|
|
* Note: we use a small assembly wrapper to save the necessary registers
|
|
* in case we are fetching the context of the current thread.
|
|
*/
|
|
NTSTATUS WINAPI NtGetContextThread( HANDLE handle, CONTEXT *context )
|
|
{
|
|
NTSTATUS ret, xsave_status;
|
|
struct syscall_frame *frame = x86_thread_data()->syscall_frame;
|
|
DWORD needed_flags = context->ContextFlags & ~CONTEXT_i386;
|
|
BOOL self = (handle == GetCurrentThread());
|
|
|
|
/* Save xstate before any calls which can potentially change volatile ymm registers.
|
|
* E. g., debug output will clobber ymm registers. */
|
|
xsave_status = self ? save_xstate( context ) : STATUS_SUCCESS;
|
|
|
|
/* debug registers require a server call */
|
|
if (needed_flags & CONTEXT_DEBUG_REGISTERS) self = FALSE;
|
|
|
|
if (!self)
|
|
{
|
|
context_t server_context;
|
|
unsigned int server_flags = get_server_context_flags( context->ContextFlags );
|
|
|
|
if ((ret = get_thread_context( handle, &server_context, server_flags, &self ))) return ret;
|
|
if ((ret = context_from_server( context, &server_context ))) return ret;
|
|
needed_flags &= ~context->ContextFlags;
|
|
}
|
|
|
|
if (self)
|
|
{
|
|
if (needed_flags & CONTEXT_INTEGER)
|
|
{
|
|
context->Eax = 0;
|
|
context->Ebx = frame->ebx;
|
|
context->Ecx = 0;
|
|
context->Edx = 0;
|
|
context->Esi = frame->esi;
|
|
context->Edi = frame->edi;
|
|
context->ContextFlags |= CONTEXT_INTEGER;
|
|
}
|
|
if (needed_flags & CONTEXT_CONTROL)
|
|
{
|
|
context->Esp = (DWORD)&frame->ret_addr;
|
|
context->Ebp = frame->ebp;
|
|
context->Eip = frame->thunk_addr;
|
|
context->EFlags = 0x202;
|
|
context->SegCs = get_cs();
|
|
context->SegSs = get_ds();
|
|
context->ContextFlags |= CONTEXT_CONTROL;
|
|
}
|
|
if (needed_flags & CONTEXT_SEGMENTS)
|
|
{
|
|
context->SegDs = get_ds();
|
|
context->SegEs = get_ds();
|
|
context->SegFs = get_fs();
|
|
context->SegGs = get_gs();
|
|
context->ContextFlags |= CONTEXT_SEGMENTS;
|
|
}
|
|
if (needed_flags & CONTEXT_FLOATING_POINT) save_fpu( context );
|
|
if (needed_flags & CONTEXT_EXTENDED_REGISTERS) save_fpux( context );
|
|
/* update the cached version of the debug registers */
|
|
if (context->ContextFlags & (CONTEXT_DEBUG_REGISTERS & ~CONTEXT_i386))
|
|
{
|
|
x86_thread_data()->dr0 = context->Dr0;
|
|
x86_thread_data()->dr1 = context->Dr1;
|
|
x86_thread_data()->dr2 = context->Dr2;
|
|
x86_thread_data()->dr3 = context->Dr3;
|
|
x86_thread_data()->dr6 = context->Dr6;
|
|
x86_thread_data()->dr7 = context->Dr7;
|
|
}
|
|
}
|
|
|
|
if (context->ContextFlags & (CONTEXT_INTEGER & ~CONTEXT_i386))
|
|
TRACE( "%p: eax=%08x ebx=%08x ecx=%08x edx=%08x esi=%08x edi=%08x\n", handle,
|
|
context->Eax, context->Ebx, context->Ecx, context->Edx, context->Esi, context->Edi );
|
|
if (context->ContextFlags & (CONTEXT_CONTROL & ~CONTEXT_i386))
|
|
TRACE( "%p: ebp=%08x esp=%08x eip=%08x cs=%04x ss=%04x flags=%08x\n", handle,
|
|
context->Ebp, context->Esp, context->Eip, context->SegCs, context->SegSs, context->EFlags );
|
|
if (context->ContextFlags & (CONTEXT_SEGMENTS & ~CONTEXT_i386))
|
|
TRACE( "%p: ds=%04x es=%04x fs=%04x gs=%04x\n", handle,
|
|
context->SegDs, context->SegEs, context->SegFs, context->SegGs );
|
|
if (context->ContextFlags & (CONTEXT_DEBUG_REGISTERS & ~CONTEXT_i386))
|
|
TRACE( "%p: dr0=%08x dr1=%08x dr2=%08x dr3=%08x dr6=%08x dr7=%08x\n", handle,
|
|
context->Dr0, context->Dr1, context->Dr2, context->Dr3, context->Dr6, context->Dr7 );
|
|
|
|
return xsave_status;
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* is_privileged_instr
|
|
*
|
|
* Check if the fault location is a privileged instruction.
|
|
* Based on the instruction emulation code in dlls/kernel/instr.c.
|
|
*/
|
|
static inline DWORD is_privileged_instr( CONTEXT *context )
|
|
{
|
|
BYTE instr[16];
|
|
unsigned int i, len, prefix_count = 0;
|
|
|
|
if (!ldt_is_system( context->SegCs )) return 0;
|
|
len = virtual_uninterrupted_read_memory( (BYTE *)context->Eip, instr, sizeof(instr) );
|
|
|
|
for (i = 0; i < len; i++) switch (instr[i])
|
|
{
|
|
/* instruction prefixes */
|
|
case 0x2e: /* %cs: */
|
|
case 0x36: /* %ss: */
|
|
case 0x3e: /* %ds: */
|
|
case 0x26: /* %es: */
|
|
case 0x64: /* %fs: */
|
|
case 0x65: /* %gs: */
|
|
case 0x66: /* opcode size */
|
|
case 0x67: /* addr size */
|
|
case 0xf0: /* lock */
|
|
case 0xf2: /* repne */
|
|
case 0xf3: /* repe */
|
|
if (++prefix_count >= 15) return EXCEPTION_ILLEGAL_INSTRUCTION;
|
|
continue;
|
|
|
|
case 0x0f: /* extended instruction */
|
|
if (i == len - 1) return 0;
|
|
switch(instr[i + 1])
|
|
{
|
|
case 0x20: /* mov crX, reg */
|
|
case 0x21: /* mov drX, reg */
|
|
case 0x22: /* mov reg, crX */
|
|
case 0x23: /* mov reg drX */
|
|
return EXCEPTION_PRIV_INSTRUCTION;
|
|
}
|
|
return 0;
|
|
case 0x6c: /* insb (%dx) */
|
|
case 0x6d: /* insl (%dx) */
|
|
case 0x6e: /* outsb (%dx) */
|
|
case 0x6f: /* outsl (%dx) */
|
|
case 0xcd: /* int $xx */
|
|
case 0xe4: /* inb al,XX */
|
|
case 0xe5: /* in (e)ax,XX */
|
|
case 0xe6: /* outb XX,al */
|
|
case 0xe7: /* out XX,(e)ax */
|
|
case 0xec: /* inb (%dx),%al */
|
|
case 0xed: /* inl (%dx),%eax */
|
|
case 0xee: /* outb %al,(%dx) */
|
|
case 0xef: /* outl %eax,(%dx) */
|
|
case 0xf4: /* hlt */
|
|
case 0xfa: /* cli */
|
|
case 0xfb: /* sti */
|
|
return EXCEPTION_PRIV_INSTRUCTION;
|
|
default:
|
|
return 0;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* check_invalid_gs
|
|
*
|
|
* Check for fault caused by invalid %gs value (some copy protection schemes mess with it).
|
|
*/
|
|
static inline BOOL check_invalid_gs( ucontext_t *sigcontext, CONTEXT *context )
|
|
{
|
|
unsigned int prefix_count = 0;
|
|
const BYTE *instr = (BYTE *)context->Eip;
|
|
WORD system_gs = x86_thread_data()->gs;
|
|
|
|
if (context->SegGs == system_gs) return FALSE;
|
|
if (!ldt_is_system( context->SegCs )) return FALSE;
|
|
/* only handle faults in system libraries */
|
|
if (virtual_is_valid_code_address( instr, 1 )) return FALSE;
|
|
|
|
for (;;) switch(*instr)
|
|
{
|
|
/* instruction prefixes */
|
|
case 0x2e: /* %cs: */
|
|
case 0x36: /* %ss: */
|
|
case 0x3e: /* %ds: */
|
|
case 0x26: /* %es: */
|
|
case 0x64: /* %fs: */
|
|
case 0x66: /* opcode size */
|
|
case 0x67: /* addr size */
|
|
case 0xf0: /* lock */
|
|
case 0xf2: /* repne */
|
|
case 0xf3: /* repe */
|
|
if (++prefix_count >= 15) return FALSE;
|
|
instr++;
|
|
continue;
|
|
case 0x65: /* %gs: */
|
|
TRACE( "%04x/%04x at %p, fixing up\n", context->SegGs, system_gs, instr );
|
|
GS_sig(sigcontext) = system_gs;
|
|
return TRUE;
|
|
default:
|
|
return FALSE;
|
|
}
|
|
}
|
|
|
|
|
|
#include "pshpack1.h"
|
|
union atl_thunk
|
|
{
|
|
struct
|
|
{
|
|
DWORD movl; /* movl this,4(%esp) */
|
|
DWORD this;
|
|
BYTE jmp; /* jmp func */
|
|
int func;
|
|
} t1;
|
|
struct
|
|
{
|
|
BYTE movl; /* movl this,ecx */
|
|
DWORD this;
|
|
BYTE jmp; /* jmp func */
|
|
int func;
|
|
} t2;
|
|
struct
|
|
{
|
|
BYTE movl1; /* movl this,edx */
|
|
DWORD this;
|
|
BYTE movl2; /* movl func,ecx */
|
|
DWORD func;
|
|
WORD jmp; /* jmp ecx */
|
|
} t3;
|
|
struct
|
|
{
|
|
BYTE movl1; /* movl this,ecx */
|
|
DWORD this;
|
|
BYTE movl2; /* movl func,eax */
|
|
DWORD func;
|
|
WORD jmp; /* jmp eax */
|
|
} t4;
|
|
struct
|
|
{
|
|
DWORD inst1; /* pop ecx
|
|
* pop eax
|
|
* push ecx
|
|
* jmp 4(%eax) */
|
|
WORD inst2;
|
|
} t5;
|
|
};
|
|
#include "poppack.h"
|
|
|
|
/**********************************************************************
|
|
* check_atl_thunk
|
|
*
|
|
* Check if code destination is an ATL thunk, and emulate it if so.
|
|
*/
|
|
static BOOL check_atl_thunk( ucontext_t *sigcontext, EXCEPTION_RECORD *rec, CONTEXT *context )
|
|
{
|
|
const union atl_thunk *thunk = (const union atl_thunk *)rec->ExceptionInformation[1];
|
|
union atl_thunk thunk_copy;
|
|
SIZE_T thunk_len;
|
|
|
|
thunk_len = virtual_uninterrupted_read_memory( thunk, &thunk_copy, sizeof(*thunk) );
|
|
if (!thunk_len) return FALSE;
|
|
|
|
if (thunk_len >= sizeof(thunk_copy.t1) && thunk_copy.t1.movl == 0x042444c7 &&
|
|
thunk_copy.t1.jmp == 0xe9)
|
|
{
|
|
if (!virtual_uninterrupted_write_memory( (DWORD *)context->Esp + 1,
|
|
&thunk_copy.t1.this, sizeof(DWORD) ))
|
|
{
|
|
EIP_sig(sigcontext) = (DWORD_PTR)(&thunk->t1.func + 1) + thunk_copy.t1.func;
|
|
TRACE( "emulating ATL thunk type 1 at %p, func=%08x arg=%08x\n",
|
|
thunk, EIP_sig(sigcontext), thunk_copy.t1.this );
|
|
return TRUE;
|
|
}
|
|
}
|
|
else if (thunk_len >= sizeof(thunk_copy.t2) && thunk_copy.t2.movl == 0xb9 &&
|
|
thunk_copy.t2.jmp == 0xe9)
|
|
{
|
|
ECX_sig(sigcontext) = thunk_copy.t2.this;
|
|
EIP_sig(sigcontext) = (DWORD_PTR)(&thunk->t2.func + 1) + thunk_copy.t2.func;
|
|
TRACE( "emulating ATL thunk type 2 at %p, func=%08x ecx=%08x\n",
|
|
thunk, EIP_sig(sigcontext), ECX_sig(sigcontext) );
|
|
return TRUE;
|
|
}
|
|
else if (thunk_len >= sizeof(thunk_copy.t3) && thunk_copy.t3.movl1 == 0xba &&
|
|
thunk_copy.t3.movl2 == 0xb9 &&
|
|
thunk_copy.t3.jmp == 0xe1ff)
|
|
{
|
|
EDX_sig(sigcontext) = thunk_copy.t3.this;
|
|
ECX_sig(sigcontext) = thunk_copy.t3.func;
|
|
EIP_sig(sigcontext) = thunk_copy.t3.func;
|
|
TRACE( "emulating ATL thunk type 3 at %p, func=%08x ecx=%08x edx=%08x\n",
|
|
thunk, EIP_sig(sigcontext), ECX_sig(sigcontext), EDX_sig(sigcontext) );
|
|
return TRUE;
|
|
}
|
|
else if (thunk_len >= sizeof(thunk_copy.t4) && thunk_copy.t4.movl1 == 0xb9 &&
|
|
thunk_copy.t4.movl2 == 0xb8 &&
|
|
thunk_copy.t4.jmp == 0xe0ff)
|
|
{
|
|
ECX_sig(sigcontext) = thunk_copy.t4.this;
|
|
EAX_sig(sigcontext) = thunk_copy.t4.func;
|
|
EIP_sig(sigcontext) = thunk_copy.t4.func;
|
|
TRACE( "emulating ATL thunk type 4 at %p, func=%08x eax=%08x ecx=%08x\n",
|
|
thunk, EIP_sig(sigcontext), EAX_sig(sigcontext), ECX_sig(sigcontext) );
|
|
return TRUE;
|
|
}
|
|
else if (thunk_len >= sizeof(thunk_copy.t5) && thunk_copy.t5.inst1 == 0xff515859 &&
|
|
thunk_copy.t5.inst2 == 0x0460)
|
|
{
|
|
DWORD func, sp[2];
|
|
if (virtual_uninterrupted_read_memory( (DWORD *)context->Esp, sp, sizeof(sp) ) == sizeof(sp) &&
|
|
virtual_uninterrupted_read_memory( (DWORD *)sp[1] + 1, &func, sizeof(DWORD) ) == sizeof(DWORD) &&
|
|
!virtual_uninterrupted_write_memory( (DWORD *)context->Esp + 1, &sp[0], sizeof(sp[0]) ))
|
|
{
|
|
ECX_sig(sigcontext) = sp[0];
|
|
EAX_sig(sigcontext) = sp[1];
|
|
ESP_sig(sigcontext) += sizeof(DWORD);
|
|
EIP_sig(sigcontext) = func;
|
|
TRACE( "emulating ATL thunk type 5 at %p, func=%08x eax=%08x ecx=%08x esp=%08x\n",
|
|
thunk, EIP_sig(sigcontext), EAX_sig(sigcontext),
|
|
ECX_sig(sigcontext), ESP_sig(sigcontext) );
|
|
return TRUE;
|
|
}
|
|
}
|
|
|
|
return FALSE;
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* setup_exception_record
|
|
*
|
|
* Setup the exception record and context on the thread stack.
|
|
*/
|
|
static void *setup_exception_record( ucontext_t *sigcontext, EXCEPTION_RECORD *rec, struct xcontext *xcontext )
|
|
{
|
|
void *stack = init_handler( sigcontext );
|
|
|
|
rec->ExceptionAddress = (void *)EIP_sig( sigcontext );
|
|
save_context( xcontext, sigcontext );
|
|
return stack;
|
|
}
|
|
|
|
/***********************************************************************
|
|
* setup_raise_exception
|
|
*
|
|
* Change context to setup a call to a raise exception function.
|
|
*/
|
|
static void setup_raise_exception( ucontext_t *sigcontext, void *stack_ptr,
|
|
EXCEPTION_RECORD *rec, struct xcontext *xcontext )
|
|
{
|
|
CONTEXT *context = &xcontext->c;
|
|
size_t stack_size;
|
|
XSTATE *src_xs;
|
|
|
|
struct stack_layout
|
|
{
|
|
EXCEPTION_RECORD *rec_ptr; /* first arg for KiUserExceptionDispatcher */
|
|
CONTEXT *context_ptr; /* second arg for KiUserExceptionDispatcher */
|
|
CONTEXT context;
|
|
CONTEXT_EX context_ex;
|
|
EXCEPTION_RECORD rec;
|
|
DWORD ebp;
|
|
DWORD eip;
|
|
char xstate[0];
|
|
} *stack;
|
|
|
|
C_ASSERT( (offsetof(struct stack_layout, xstate) == sizeof(struct stack_layout)) );
|
|
|
|
NTSTATUS status = send_debug_event( rec, context, TRUE );
|
|
|
|
if (status == DBG_CONTINUE || status == DBG_EXCEPTION_HANDLED)
|
|
{
|
|
restore_context( xcontext, sigcontext );
|
|
return;
|
|
}
|
|
|
|
/* fix up instruction pointer in context for EXCEPTION_BREAKPOINT */
|
|
if (rec->ExceptionCode == EXCEPTION_BREAKPOINT) context->Eip--;
|
|
|
|
stack_size = sizeof(*stack);
|
|
if ((src_xs = xstate_from_context( context )))
|
|
{
|
|
stack_size += (ULONG_PTR)stack_ptr - (((ULONG_PTR)stack_ptr
|
|
- sizeof(XSTATE)) & ~(ULONG_PTR)63);
|
|
}
|
|
|
|
stack = virtual_setup_exception( stack_ptr, stack_size, rec );
|
|
stack->rec = *rec;
|
|
stack->context = *context;
|
|
|
|
if (src_xs)
|
|
{
|
|
XSTATE *dst_xs = (XSTATE *)stack->xstate;
|
|
|
|
assert(!((ULONG_PTR)dst_xs & 63));
|
|
context_init_xstate( &stack->context, stack->xstate );
|
|
memset( dst_xs, 0, offsetof(XSTATE, YmmContext) );
|
|
dst_xs->CompactionMask = user_shared_data->XState.CompactionEnabled ? 0x8000000000000004 : 0;
|
|
if (src_xs->Mask & 4)
|
|
{
|
|
dst_xs->Mask = 4;
|
|
memcpy( &dst_xs->YmmContext, &src_xs->YmmContext, sizeof(dst_xs->YmmContext) );
|
|
}
|
|
}
|
|
|
|
stack->rec_ptr = &stack->rec;
|
|
stack->context_ptr = &stack->context;
|
|
ESP_sig(sigcontext) = (DWORD)stack;
|
|
EIP_sig(sigcontext) = (DWORD)pKiUserExceptionDispatcher;
|
|
/* clear single-step, direction, and align check flag */
|
|
EFL_sig(sigcontext) &= ~(0x100|0x400|0x40000);
|
|
CS_sig(sigcontext) = get_cs();
|
|
DS_sig(sigcontext) = get_ds();
|
|
ES_sig(sigcontext) = get_ds();
|
|
FS_sig(sigcontext) = get_fs();
|
|
GS_sig(sigcontext) = get_gs();
|
|
SS_sig(sigcontext) = get_ds();
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* setup_exception
|
|
*
|
|
* Do the full setup to raise an exception from an exception record.
|
|
*/
|
|
static void setup_exception( ucontext_t *sigcontext, EXCEPTION_RECORD *rec )
|
|
{
|
|
struct xcontext xcontext;
|
|
void *stack = setup_exception_record( sigcontext, rec, &xcontext );
|
|
|
|
setup_raise_exception( sigcontext, stack, rec, &xcontext );
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* call_user_apc_dispatcher
|
|
*/
|
|
__ASM_GLOBAL_FUNC( call_user_apc_dispatcher,
|
|
"movl 4(%esp),%esi\n\t" /* context_ptr */
|
|
"movl 24(%esp),%edi\n\t" /* dispatcher */
|
|
"test %esi,%esi\n\t"
|
|
"jz 1f\n\t"
|
|
"movl 0xc4(%esi),%eax\n\t" /* context_ptr->Rsp */
|
|
"leal -0x2f8(%eax),%eax\n\t" /* sizeof(CONTEXT) + offsetof(frame,ret_addr) + params */
|
|
"movl 20(%esp),%ecx\n\t" /* func */
|
|
"movl %ecx,20(%eax)\n\t"
|
|
"movl 8(%esp),%ebx\n\t" /* ctx */
|
|
"movl 12(%esp),%edx\n\t" /* arg1 */
|
|
"movl 16(%esp),%ecx\n\t" /* arg2 */
|
|
"leal 4(%eax),%esp\n\t"
|
|
"jmp 2f\n"
|
|
"1:\tmovl %fs:0x1f8,%eax\n\t" /* x86_thread_data()->syscall_frame */
|
|
"leal -0x2cc(%eax),%esi\n\t"
|
|
"movl %esp,%ebx\n\t"
|
|
"cmpl %esp,%esi\n\t"
|
|
"cmovbl %esi,%esp\n\t"
|
|
"movl $0x00010007,(%esi)\n\t" /* context.ContextFlags = CONTEXT_FULL */
|
|
"pushl %esi\n\t" /* context */
|
|
"pushl $0xfffffffe\n\t"
|
|
"call " __ASM_STDCALL("NtGetContextThread",8) "\n\t"
|
|
"movl $0xc0,0xb0(%esi)\n" /* context.Eax = STATUS_USER_APC */
|
|
"movl 20(%ebx),%eax\n\t" /* func */
|
|
"movl 16(%ebx),%ecx\n\t" /* arg2 */
|
|
"movl 12(%ebx),%edx\n\t" /* arg1 */
|
|
"movl 8(%ebx),%ebx\n\t" /* ctx */
|
|
"leal -20(%esi),%esp\n\t"
|
|
"movl %eax,16(%esp)\n" /* func */
|
|
"2:\tmovl %ecx,12(%esp)\n\t" /* arg2 */
|
|
"movl %edx,8(%esp)\n\t" /* arg1 */
|
|
"movl %ebx,4(%esp)\n\t" /* ctx */
|
|
"movl %esi,(%esp)\n\t" /* context */
|
|
"movl $0,%fs:0x1f8\n\t" /* x86_thread_data()->syscall_frame = NULL */
|
|
"movl 0xb4(%esi),%ebp\n\t" /* context.Ebp */
|
|
"pushl 0xb8(%esi)\n\t" /* context.Eip */
|
|
"jmp *%edi\n" )
|
|
|
|
|
|
/***********************************************************************
|
|
* call_raise_user_exception_dispatcher
|
|
*/
|
|
__ASM_GLOBAL_FUNC( call_raise_user_exception_dispatcher,
|
|
"movl %fs:0x1f8,%eax\n\t" /* x86_thread_data()->syscall_frame */
|
|
"movl 0(%eax),%edi\n\t" /* frame->edi */
|
|
"movl 4(%eax),%esi\n\t" /* frame->esi */
|
|
"movl 8(%eax),%ebx\n\t" /* frame->ebx */
|
|
"movl 12(%eax),%ebp\n\t" /* frame->ebp */
|
|
"movl 4(%esp),%edx\n\t" /* dispatcher */
|
|
"movl $0,%fs:0x1f8\n\t"
|
|
"leal 20(%eax),%esp\n\t"
|
|
"jmp *%edx" )
|
|
|
|
|
|
/***********************************************************************
|
|
* call_user_exception_dispatcher
|
|
*/
|
|
__ASM_GLOBAL_FUNC( call_user_exception_dispatcher,
|
|
"movl 4(%esp),%edx\n\t" /* rec */
|
|
"movl 8(%esp),%ecx\n\t" /* context */
|
|
"cmpl $0x80000003,(%edx)\n\t" /* rec->ExceptionCode */
|
|
"jne 1f\n\t"
|
|
"decl 0xb8(%ecx)\n" /* context->Eip */
|
|
"1:\tmovl %fs:0x1f8,%eax\n\t" /* x86_thread_data()->syscall_frame */
|
|
"movl 0(%eax),%edi\n\t" /* frame->edi */
|
|
"movl 4(%eax),%esi\n\t" /* frame->esi */
|
|
"movl 8(%eax),%ebx\n\t" /* frame->ebx */
|
|
"movl 12(%eax),%ebp\n\t" /* frame->ebp */
|
|
"movl %edx,12(%eax)\n\t"
|
|
"movl %ecx,16(%eax)\n\t"
|
|
"movl 12(%esp),%edx\n\t" /* dispatcher */
|
|
"movl $0,%fs:0x1f8\n\t"
|
|
"leal 12(%eax),%esp\n\t"
|
|
"jmp *%edx" )
|
|
|
|
/**********************************************************************
|
|
* get_fpu_code
|
|
*
|
|
* Get the FPU exception code from the FPU status.
|
|
*/
|
|
static inline DWORD get_fpu_code( const CONTEXT *context )
|
|
{
|
|
DWORD status = context->FloatSave.StatusWord & ~(context->FloatSave.ControlWord & 0x3f);
|
|
|
|
if (status & 0x01) /* IE */
|
|
{
|
|
if (status & 0x40) /* SF */
|
|
return EXCEPTION_FLT_STACK_CHECK;
|
|
else
|
|
return EXCEPTION_FLT_INVALID_OPERATION;
|
|
}
|
|
if (status & 0x02) return EXCEPTION_FLT_DENORMAL_OPERAND; /* DE flag */
|
|
if (status & 0x04) return EXCEPTION_FLT_DIVIDE_BY_ZERO; /* ZE flag */
|
|
if (status & 0x08) return EXCEPTION_FLT_OVERFLOW; /* OE flag */
|
|
if (status & 0x10) return EXCEPTION_FLT_UNDERFLOW; /* UE flag */
|
|
if (status & 0x20) return EXCEPTION_FLT_INEXACT_RESULT; /* PE flag */
|
|
return EXCEPTION_FLT_INVALID_OPERATION; /* generic error */
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* handle_interrupt
|
|
*
|
|
* Handle an interrupt.
|
|
*/
|
|
static BOOL handle_interrupt( unsigned int interrupt, ucontext_t *sigcontext, void *stack,
|
|
EXCEPTION_RECORD *rec, struct xcontext *xcontext )
|
|
{
|
|
CONTEXT *context = &xcontext->c;
|
|
|
|
switch(interrupt)
|
|
{
|
|
case 0x2d:
|
|
if (!is_wow64)
|
|
{
|
|
/* On Wow64, the upper DWORD of Rax contains garbage, and the debug
|
|
* service is usually not recognized when called from usermode. */
|
|
switch (context->Eax)
|
|
{
|
|
case 1: /* BREAKPOINT_PRINT */
|
|
case 3: /* BREAKPOINT_LOAD_SYMBOLS */
|
|
case 4: /* BREAKPOINT_UNLOAD_SYMBOLS */
|
|
case 5: /* BREAKPOINT_COMMAND_STRING (>= Win2003) */
|
|
EIP_sig(sigcontext) += 3;
|
|
return TRUE;
|
|
}
|
|
}
|
|
context->Eip += 3;
|
|
rec->ExceptionCode = EXCEPTION_BREAKPOINT;
|
|
rec->ExceptionAddress = (void *)context->Eip;
|
|
rec->NumberParameters = is_wow64 ? 1 : 3;
|
|
rec->ExceptionInformation[0] = context->Eax;
|
|
rec->ExceptionInformation[1] = context->Ecx;
|
|
rec->ExceptionInformation[2] = context->Edx;
|
|
setup_raise_exception( sigcontext, stack, rec, xcontext );
|
|
return TRUE;
|
|
default:
|
|
return FALSE;
|
|
}
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* handle_syscall_fault
|
|
*
|
|
* Handle a page fault happening during a system call.
|
|
*/
|
|
static BOOL handle_syscall_fault( ucontext_t *sigcontext, void *stack_ptr,
|
|
EXCEPTION_RECORD *rec, CONTEXT *context )
|
|
{
|
|
struct syscall_frame *frame = x86_thread_data()->syscall_frame;
|
|
__WINE_FRAME *wine_frame = (__WINE_FRAME *)NtCurrentTeb()->Tib.ExceptionList;
|
|
DWORD i;
|
|
|
|
if (!frame) return FALSE;
|
|
|
|
TRACE( "code=%x flags=%x addr=%p ip=%08x tid=%04x\n",
|
|
rec->ExceptionCode, rec->ExceptionFlags, rec->ExceptionAddress,
|
|
context->Eip, GetCurrentThreadId() );
|
|
for (i = 0; i < rec->NumberParameters; i++)
|
|
TRACE( " info[%d]=%08lx\n", i, rec->ExceptionInformation[i] );
|
|
TRACE(" eax=%08x ebx=%08x ecx=%08x edx=%08x esi=%08x edi=%08x\n",
|
|
context->Eax, context->Ebx, context->Ecx,
|
|
context->Edx, context->Esi, context->Edi );
|
|
TRACE(" ebp=%08x esp=%08x cs=%04x ds=%04x es=%04x fs=%04x gs=%04x flags=%08x\n",
|
|
context->Ebp, context->Esp, context->SegCs, context->SegDs,
|
|
context->SegEs, context->SegFs, context->SegGs, context->EFlags );
|
|
|
|
if ((char *)wine_frame < (char *)frame)
|
|
{
|
|
/* stack frame for calling __wine_longjmp */
|
|
struct
|
|
{
|
|
int retval;
|
|
__wine_jmp_buf *jmp;
|
|
void *retaddr;
|
|
} *stack;
|
|
|
|
TRACE( "returning to handler\n" );
|
|
stack = virtual_setup_exception( stack_ptr, sizeof(*stack), rec );
|
|
stack->retval = 1;
|
|
stack->jmp = &wine_frame->jmp;
|
|
stack->retaddr = (void *)0xdeadbabe;
|
|
ESP_sig(sigcontext) = (DWORD)stack;
|
|
EIP_sig(sigcontext) = (DWORD)__wine_longjmp;
|
|
}
|
|
else
|
|
{
|
|
TRACE( "returning to user mode ip=%08x ret=%08x\n", frame->ret_addr, rec->ExceptionCode );
|
|
EAX_sig(sigcontext) = rec->ExceptionCode;
|
|
EBX_sig(sigcontext) = frame->ebx;
|
|
ESI_sig(sigcontext) = frame->esi;
|
|
EDI_sig(sigcontext) = frame->edi;
|
|
EBP_sig(sigcontext) = frame->ebp;
|
|
ESP_sig(sigcontext) = (DWORD)&frame->ret_addr;
|
|
EIP_sig(sigcontext) = frame->thunk_addr;
|
|
x86_thread_data()->syscall_frame = NULL;
|
|
}
|
|
return TRUE;
|
|
}
|
|
|
|
|
|
/**********************************************************************
|
|
* segv_handler
|
|
*
|
|
* Handler for SIGSEGV and related errors.
|
|
*/
|
|
static void segv_handler( int signal, siginfo_t *siginfo, void *sigcontext )
|
|
{
|
|
EXCEPTION_RECORD rec = { 0 };
|
|
struct xcontext xcontext;
|
|
ucontext_t *ucontext = sigcontext;
|
|
void *stack = setup_exception_record( sigcontext, &rec, &xcontext );
|
|
|
|
switch (TRAP_sig(ucontext))
|
|
{
|
|
case TRAP_x86_OFLOW: /* Overflow exception */
|
|
rec.ExceptionCode = EXCEPTION_INT_OVERFLOW;
|
|
break;
|
|
case TRAP_x86_BOUND: /* Bound range exception */
|
|
rec.ExceptionCode = EXCEPTION_ARRAY_BOUNDS_EXCEEDED;
|
|
break;
|
|
case TRAP_x86_PRIVINFLT: /* Invalid opcode exception */
|
|
rec.ExceptionCode = EXCEPTION_ILLEGAL_INSTRUCTION;
|
|
break;
|
|
case TRAP_x86_STKFLT: /* Stack fault */
|
|
rec.ExceptionCode = EXCEPTION_STACK_OVERFLOW;
|
|
break;
|
|
case TRAP_x86_SEGNPFLT: /* Segment not present exception */
|
|
case TRAP_x86_PROTFLT: /* General protection fault */
|
|
{
|
|
WORD err = ERROR_sig(ucontext);
|
|
if (!err && (rec.ExceptionCode = is_privileged_instr( &xcontext.c ))) break;
|
|
if ((err & 7) == 2 && handle_interrupt( err >> 3, ucontext, stack, &rec, &xcontext )) return;
|
|
rec.ExceptionCode = EXCEPTION_ACCESS_VIOLATION;
|
|
rec.NumberParameters = 2;
|
|
rec.ExceptionInformation[0] = 0;
|
|
/* if error contains a LDT selector, use that as fault address */
|
|
if ((err & 7) == 4 && !ldt_is_system( err | 7 )) rec.ExceptionInformation[1] = err & ~7;
|
|
else
|
|
{
|
|
rec.ExceptionInformation[1] = 0xffffffff;
|
|
if (check_invalid_gs( ucontext, &xcontext.c )) return;
|
|
}
|
|
}
|
|
break;
|
|
case TRAP_x86_PAGEFLT: /* Page fault */
|
|
rec.NumberParameters = 2;
|
|
rec.ExceptionInformation[0] = (ERROR_sig(ucontext) >> 1) & 0x09;
|
|
rec.ExceptionInformation[1] = (ULONG_PTR)siginfo->si_addr;
|
|
rec.ExceptionCode = virtual_handle_fault( siginfo->si_addr, rec.ExceptionInformation[0], stack );
|
|
if (!rec.ExceptionCode) return;
|
|
if (rec.ExceptionCode == EXCEPTION_ACCESS_VIOLATION &&
|
|
rec.ExceptionInformation[0] == EXCEPTION_EXECUTE_FAULT)
|
|
{
|
|
ULONG flags;
|
|
NtQueryInformationProcess( GetCurrentProcess(), ProcessExecuteFlags,
|
|
&flags, sizeof(flags), NULL );
|
|
if (!(flags & MEM_EXECUTE_OPTION_DISABLE_THUNK_EMULATION) &&
|
|
check_atl_thunk( ucontext, &rec, &xcontext.c ))
|
|
return;
|
|
|
|
/* send EXCEPTION_EXECUTE_FAULT only if data execution prevention is enabled */
|
|
if (!(flags & MEM_EXECUTE_OPTION_DISABLE)) rec.ExceptionInformation[0] = EXCEPTION_READ_FAULT;
|
|
}
|
|
break;
|
|
case TRAP_x86_ALIGNFLT: /* Alignment check exception */
|
|
/* FIXME: pass through exception handler first? */
|
|
if (xcontext.c.EFlags & 0x00040000)
|
|
{
|
|
EFL_sig(ucontext) &= ~0x00040000; /* disable AC flag */
|
|
return;
|
|
}
|
|
rec.ExceptionCode = EXCEPTION_DATATYPE_MISALIGNMENT;
|
|
break;
|
|
default:
|
|
WINE_ERR( "Got unexpected trap %d\n", TRAP_sig(ucontext) );
|
|
/* fall through */
|
|
case TRAP_x86_NMI: /* NMI interrupt */
|
|
case TRAP_x86_DNA: /* Device not available exception */
|
|
case TRAP_x86_DOUBLEFLT: /* Double fault exception */
|
|
case TRAP_x86_TSSFLT: /* Invalid TSS exception */
|
|
case TRAP_x86_MCHK: /* Machine check exception */
|
|
case TRAP_x86_CACHEFLT: /* Cache flush exception */
|
|
rec.ExceptionCode = EXCEPTION_ILLEGAL_INSTRUCTION;
|
|
break;
|
|
}
|
|
if (handle_syscall_fault( ucontext, stack, &rec, &xcontext.c )) return;
|
|
setup_raise_exception( ucontext, stack, &rec, &xcontext );
|
|
}
|
|
|
|
|
|
/**********************************************************************
|
|
* trap_handler
|
|
*
|
|
* Handler for SIGTRAP.
|
|
*/
|
|
static void trap_handler( int signal, siginfo_t *siginfo, void *sigcontext )
|
|
{
|
|
EXCEPTION_RECORD rec = { 0 };
|
|
struct xcontext xcontext;
|
|
ucontext_t *ucontext = sigcontext;
|
|
void *stack = setup_exception_record( sigcontext, &rec, &xcontext );
|
|
|
|
switch (TRAP_sig(ucontext))
|
|
{
|
|
case TRAP_x86_TRCTRAP: /* Single-step exception */
|
|
rec.ExceptionCode = EXCEPTION_SINGLE_STEP;
|
|
/* when single stepping can't tell whether this is a hw bp or a
|
|
* single step interrupt. try to avoid as much overhead as possible
|
|
* and only do a server call if there is any hw bp enabled. */
|
|
if (!(xcontext.c.EFlags & 0x100) || (xcontext.c.Dr7 & 0xff))
|
|
{
|
|
/* (possible) hardware breakpoint, fetch the debug registers */
|
|
DWORD saved_flags = xcontext.c.ContextFlags;
|
|
xcontext.c.ContextFlags = CONTEXT_DEBUG_REGISTERS;
|
|
NtGetContextThread( GetCurrentThread(), &xcontext.c );
|
|
xcontext.c.ContextFlags |= saved_flags; /* restore flags */
|
|
}
|
|
xcontext.c.EFlags &= ~0x100; /* clear single-step flag */
|
|
break;
|
|
case TRAP_x86_BPTFLT: /* Breakpoint exception */
|
|
rec.ExceptionAddress = (char *)rec.ExceptionAddress - 1; /* back up over the int3 instruction */
|
|
/* fall through */
|
|
default:
|
|
rec.ExceptionCode = EXCEPTION_BREAKPOINT;
|
|
rec.NumberParameters = is_wow64 ? 1 : 3;
|
|
rec.ExceptionInformation[0] = 0;
|
|
rec.ExceptionInformation[1] = 0; /* FIXME */
|
|
rec.ExceptionInformation[2] = 0; /* FIXME */
|
|
break;
|
|
}
|
|
setup_raise_exception( sigcontext, stack, &rec, &xcontext );
|
|
}
|
|
|
|
|
|
/**********************************************************************
|
|
* fpe_handler
|
|
*
|
|
* Handler for SIGFPE.
|
|
*/
|
|
static void fpe_handler( int signal, siginfo_t *siginfo, void *sigcontext )
|
|
{
|
|
EXCEPTION_RECORD rec = { 0 };
|
|
struct xcontext xcontext;
|
|
ucontext_t *ucontext = sigcontext;
|
|
void *stack = setup_exception_record( sigcontext, &rec, &xcontext );
|
|
|
|
switch (TRAP_sig(ucontext))
|
|
{
|
|
case TRAP_x86_DIVIDE: /* Division by zero exception */
|
|
rec.ExceptionCode = EXCEPTION_INT_DIVIDE_BY_ZERO;
|
|
break;
|
|
case TRAP_x86_FPOPFLT: /* Coprocessor segment overrun */
|
|
rec.ExceptionCode = EXCEPTION_FLT_INVALID_OPERATION;
|
|
break;
|
|
case TRAP_x86_ARITHTRAP: /* Floating point exception */
|
|
rec.ExceptionCode = get_fpu_code( &xcontext.c );
|
|
rec.ExceptionAddress = (void *)xcontext.c.FloatSave.ErrorOffset;
|
|
break;
|
|
case TRAP_x86_CACHEFLT: /* SIMD exception */
|
|
/* TODO:
|
|
* Behaviour only tested for divide-by-zero exceptions
|
|
* Check for other SIMD exceptions as well */
|
|
if(siginfo->si_code != FPE_FLTDIV && siginfo->si_code != FPE_FLTINV)
|
|
FIXME("untested SIMD exception: %#x. Might not work correctly\n",
|
|
siginfo->si_code);
|
|
|
|
rec.ExceptionCode = STATUS_FLOAT_MULTIPLE_TRAPS;
|
|
rec.NumberParameters = 1;
|
|
/* no idea what meaning is actually behind this but that's what native does */
|
|
rec.ExceptionInformation[0] = 0;
|
|
break;
|
|
default:
|
|
WINE_ERR( "Got unexpected trap %d\n", TRAP_sig(ucontext) );
|
|
rec.ExceptionCode = EXCEPTION_FLT_INVALID_OPERATION;
|
|
break;
|
|
}
|
|
setup_raise_exception( sigcontext, stack, &rec, &xcontext );
|
|
}
|
|
|
|
|
|
/**********************************************************************
|
|
* int_handler
|
|
*
|
|
* Handler for SIGINT.
|
|
*/
|
|
static void int_handler( int signal, siginfo_t *siginfo, void *sigcontext )
|
|
{
|
|
EXCEPTION_RECORD rec = { CONTROL_C_EXIT };
|
|
|
|
setup_exception( sigcontext, &rec );
|
|
}
|
|
|
|
/**********************************************************************
|
|
* abrt_handler
|
|
*
|
|
* Handler for SIGABRT.
|
|
*/
|
|
static void abrt_handler( int signal, siginfo_t *siginfo, void *sigcontext )
|
|
{
|
|
EXCEPTION_RECORD rec = { EXCEPTION_WINE_ASSERTION, EH_NONCONTINUABLE };
|
|
|
|
setup_exception( sigcontext, &rec );
|
|
}
|
|
|
|
|
|
/**********************************************************************
|
|
* quit_handler
|
|
*
|
|
* Handler for SIGQUIT.
|
|
*/
|
|
static void quit_handler( int signal, siginfo_t *siginfo, void *sigcontext )
|
|
{
|
|
init_handler( sigcontext );
|
|
abort_thread(0);
|
|
}
|
|
|
|
|
|
/**********************************************************************
|
|
* usr1_handler
|
|
*
|
|
* Handler for SIGUSR1, used to signal a thread that it got suspended.
|
|
*/
|
|
static void usr1_handler( int signal, siginfo_t *siginfo, void *sigcontext )
|
|
{
|
|
struct xcontext xcontext;
|
|
|
|
init_handler( sigcontext );
|
|
save_context( &xcontext, sigcontext );
|
|
wait_suspend( &xcontext.c );
|
|
restore_context( &xcontext, sigcontext );
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* LDT support
|
|
*/
|
|
|
|
#define LDT_SIZE 8192
|
|
|
|
#define LDT_FLAGS_DATA 0x13 /* Data segment */
|
|
#define LDT_FLAGS_CODE 0x1b /* Code segment */
|
|
#define LDT_FLAGS_32BIT 0x40 /* Segment is 32-bit (code or stack) */
|
|
#define LDT_FLAGS_ALLOCATED 0x80 /* Segment is allocated */
|
|
|
|
struct ldt_copy
|
|
{
|
|
void *base[LDT_SIZE];
|
|
unsigned int limit[LDT_SIZE];
|
|
unsigned char flags[LDT_SIZE];
|
|
} __wine_ldt_copy;
|
|
|
|
static WORD gdt_fs_sel;
|
|
static pthread_mutex_t ldt_mutex = PTHREAD_MUTEX_INITIALIZER;
|
|
static const LDT_ENTRY null_entry;
|
|
|
|
static inline void *ldt_get_base( LDT_ENTRY ent )
|
|
{
|
|
return (void *)(ent.BaseLow |
|
|
(ULONG_PTR)ent.HighWord.Bits.BaseMid << 16 |
|
|
(ULONG_PTR)ent.HighWord.Bits.BaseHi << 24);
|
|
}
|
|
|
|
static inline unsigned int ldt_get_limit( LDT_ENTRY ent )
|
|
{
|
|
unsigned int limit = ent.LimitLow | (ent.HighWord.Bits.LimitHi << 16);
|
|
if (ent.HighWord.Bits.Granularity) limit = (limit << 12) | 0xfff;
|
|
return limit;
|
|
}
|
|
|
|
static LDT_ENTRY ldt_make_entry( void *base, unsigned int limit, unsigned char flags )
|
|
{
|
|
LDT_ENTRY entry;
|
|
|
|
entry.BaseLow = (WORD)(ULONG_PTR)base;
|
|
entry.HighWord.Bits.BaseMid = (BYTE)((ULONG_PTR)base >> 16);
|
|
entry.HighWord.Bits.BaseHi = (BYTE)((ULONG_PTR)base >> 24);
|
|
if ((entry.HighWord.Bits.Granularity = (limit >= 0x100000))) limit >>= 12;
|
|
entry.LimitLow = (WORD)limit;
|
|
entry.HighWord.Bits.LimitHi = limit >> 16;
|
|
entry.HighWord.Bits.Dpl = 3;
|
|
entry.HighWord.Bits.Pres = 1;
|
|
entry.HighWord.Bits.Type = flags;
|
|
entry.HighWord.Bits.Sys = 0;
|
|
entry.HighWord.Bits.Reserved_0 = 0;
|
|
entry.HighWord.Bits.Default_Big = (flags & LDT_FLAGS_32BIT) != 0;
|
|
return entry;
|
|
}
|
|
|
|
static void ldt_set_entry( WORD sel, LDT_ENTRY entry )
|
|
{
|
|
int index = sel >> 3;
|
|
|
|
#ifdef linux
|
|
struct modify_ldt_s ldt_info = { index };
|
|
|
|
ldt_info.base_addr = ldt_get_base( entry );
|
|
ldt_info.limit = entry.LimitLow | (entry.HighWord.Bits.LimitHi << 16);
|
|
ldt_info.seg_32bit = entry.HighWord.Bits.Default_Big;
|
|
ldt_info.contents = (entry.HighWord.Bits.Type >> 2) & 3;
|
|
ldt_info.read_exec_only = !(entry.HighWord.Bits.Type & 2);
|
|
ldt_info.limit_in_pages = entry.HighWord.Bits.Granularity;
|
|
ldt_info.seg_not_present = !entry.HighWord.Bits.Pres;
|
|
ldt_info.usable = entry.HighWord.Bits.Sys;
|
|
if (modify_ldt( 0x11, &ldt_info, sizeof(ldt_info) ) < 0) perror( "modify_ldt" );
|
|
#elif defined(__NetBSD__) || defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__OpenBSD__) || defined(__DragonFly__)
|
|
/* The kernel will only let us set LDTs with user priority level */
|
|
if (entry.HighWord.Bits.Pres && entry.HighWord.Bits.Dpl != 3) entry.HighWord.Bits.Dpl = 3;
|
|
if (i386_set_ldt(index, (union descriptor *)&entry, 1) < 0)
|
|
{
|
|
perror("i386_set_ldt");
|
|
fprintf( stderr, "Did you reconfigure the kernel with \"options USER_LDT\"?\n" );
|
|
exit(1);
|
|
}
|
|
#elif defined(__svr4__) || defined(_SCO_DS)
|
|
struct ssd ldt_mod;
|
|
|
|
ldt_mod.sel = sel;
|
|
ldt_mod.bo = (unsigned long)ldt_get_base( entry );
|
|
ldt_mod.ls = entry.LimitLow | (entry.HighWord.Bits.LimitHi << 16);
|
|
ldt_mod.acc1 = entry.HighWord.Bytes.Flags1;
|
|
ldt_mod.acc2 = entry.HighWord.Bytes.Flags2 >> 4;
|
|
if (sysi86(SI86DSCR, &ldt_mod) == -1) perror("sysi86");
|
|
#elif defined(__APPLE__)
|
|
if (i386_set_ldt(index, (union ldt_entry *)&entry, 1) < 0) perror("i386_set_ldt");
|
|
#elif defined(__GNU__)
|
|
if (i386_set_ldt(mach_thread_self(), sel, (descriptor_list_t)&entry, 1) != KERN_SUCCESS)
|
|
perror("i386_set_ldt");
|
|
#else
|
|
fprintf( stderr, "No LDT support on this platform\n" );
|
|
exit(1);
|
|
#endif
|
|
|
|
__wine_ldt_copy.base[index] = ldt_get_base( entry );
|
|
__wine_ldt_copy.limit[index] = ldt_get_limit( entry );
|
|
__wine_ldt_copy.flags[index] = (entry.HighWord.Bits.Type |
|
|
(entry.HighWord.Bits.Default_Big ? LDT_FLAGS_32BIT : 0) |
|
|
LDT_FLAGS_ALLOCATED);
|
|
}
|
|
|
|
static void ldt_set_fs( WORD sel, TEB *teb )
|
|
{
|
|
if (sel == gdt_fs_sel)
|
|
{
|
|
#ifdef __linux__
|
|
struct modify_ldt_s ldt_info = { sel >> 3 };
|
|
|
|
ldt_info.base_addr = teb;
|
|
ldt_info.limit = page_size - 1;
|
|
ldt_info.seg_32bit = 1;
|
|
if (set_thread_area( &ldt_info ) < 0) perror( "set_thread_area" );
|
|
#elif defined(__FreeBSD__) || defined (__FreeBSD_kernel__) || defined(__DragonFly__)
|
|
i386_set_fsbase( teb );
|
|
#endif
|
|
}
|
|
set_fs( sel );
|
|
}
|
|
|
|
|
|
/**********************************************************************
|
|
* get_thread_ldt_entry
|
|
*/
|
|
NTSTATUS get_thread_ldt_entry( HANDLE handle, void *data, ULONG len, ULONG *ret_len )
|
|
{
|
|
THREAD_DESCRIPTOR_INFORMATION *info = data;
|
|
NTSTATUS status = STATUS_SUCCESS;
|
|
|
|
if (len < sizeof(*info)) return STATUS_INFO_LENGTH_MISMATCH;
|
|
if (info->Selector >> 16) return STATUS_UNSUCCESSFUL;
|
|
|
|
if (is_gdt_sel( info->Selector ))
|
|
{
|
|
if (!(info->Selector & ~3))
|
|
info->Entry = null_entry;
|
|
else if ((info->Selector | 3) == get_cs())
|
|
info->Entry = ldt_make_entry( 0, ~0u, LDT_FLAGS_CODE | LDT_FLAGS_32BIT );
|
|
else if ((info->Selector | 3) == get_ds())
|
|
info->Entry = ldt_make_entry( 0, ~0u, LDT_FLAGS_DATA | LDT_FLAGS_32BIT );
|
|
else if ((info->Selector | 3) == get_fs())
|
|
info->Entry = ldt_make_entry( NtCurrentTeb(), 0xfff, LDT_FLAGS_DATA | LDT_FLAGS_32BIT );
|
|
else
|
|
return STATUS_UNSUCCESSFUL;
|
|
}
|
|
else
|
|
{
|
|
SERVER_START_REQ( get_selector_entry )
|
|
{
|
|
req->handle = wine_server_obj_handle( handle );
|
|
req->entry = info->Selector >> 3;
|
|
status = wine_server_call( req );
|
|
if (!status)
|
|
{
|
|
if (reply->flags)
|
|
info->Entry = ldt_make_entry( (void *)reply->base, reply->limit, reply->flags );
|
|
else
|
|
status = STATUS_UNSUCCESSFUL;
|
|
}
|
|
}
|
|
SERVER_END_REQ;
|
|
}
|
|
if (status == STATUS_SUCCESS && ret_len)
|
|
/* yes, that's a bit strange, but it's the way it is */
|
|
*ret_len = sizeof(info->Entry);
|
|
|
|
return status;
|
|
}
|
|
|
|
|
|
/******************************************************************************
|
|
* NtSetLdtEntries (NTDLL.@)
|
|
* ZwSetLdtEntries (NTDLL.@)
|
|
*/
|
|
NTSTATUS WINAPI NtSetLdtEntries( ULONG sel1, LDT_ENTRY entry1, ULONG sel2, LDT_ENTRY entry2 )
|
|
{
|
|
sigset_t sigset;
|
|
|
|
if (sel1 >> 16 || sel2 >> 16) return STATUS_INVALID_LDT_DESCRIPTOR;
|
|
if (sel1 && (sel1 >> 3) < first_ldt_entry) return STATUS_INVALID_LDT_DESCRIPTOR;
|
|
if (sel2 && (sel2 >> 3) < first_ldt_entry) return STATUS_INVALID_LDT_DESCRIPTOR;
|
|
|
|
server_enter_uninterrupted_section( &ldt_mutex, &sigset );
|
|
if (sel1) ldt_set_entry( sel1, entry1 );
|
|
if (sel2) ldt_set_entry( sel2, entry2 );
|
|
server_leave_uninterrupted_section( &ldt_mutex, &sigset );
|
|
return STATUS_SUCCESS;
|
|
}
|
|
|
|
|
|
/**********************************************************************
|
|
* signal_init_threading
|
|
*/
|
|
void signal_init_threading(void)
|
|
{
|
|
#ifdef __linux__
|
|
/* the preloader may have allocated it already */
|
|
gdt_fs_sel = get_fs();
|
|
if (!gdt_fs_sel || !is_gdt_sel( gdt_fs_sel ))
|
|
{
|
|
struct modify_ldt_s ldt_info = { -1 };
|
|
|
|
ldt_info.seg_32bit = 1;
|
|
ldt_info.usable = 1;
|
|
if (set_thread_area( &ldt_info ) >= 0) gdt_fs_sel = (ldt_info.entry_number << 3) | 3;
|
|
else gdt_fs_sel = 0;
|
|
}
|
|
#elif defined(__FreeBSD__) || defined (__FreeBSD_kernel__)
|
|
gdt_fs_sel = GSEL( GUFS_SEL, SEL_UPL );
|
|
#endif
|
|
}
|
|
|
|
|
|
/**********************************************************************
|
|
* signal_alloc_thread
|
|
*/
|
|
NTSTATUS signal_alloc_thread( TEB *teb )
|
|
{
|
|
struct x86_thread_data *thread_data = (struct x86_thread_data *)&teb->GdiTebBatch;
|
|
|
|
if (!gdt_fs_sel)
|
|
{
|
|
static int first_thread = 1;
|
|
sigset_t sigset;
|
|
int idx;
|
|
LDT_ENTRY entry = ldt_make_entry( teb, page_size - 1, LDT_FLAGS_DATA | LDT_FLAGS_32BIT );
|
|
|
|
if (first_thread) /* no locking for first thread */
|
|
{
|
|
/* leave some space if libc is using the LDT for %gs */
|
|
if (!is_gdt_sel( get_gs() )) first_ldt_entry = 512;
|
|
idx = first_ldt_entry;
|
|
ldt_set_entry( (idx << 3) | 7, entry );
|
|
first_thread = 0;
|
|
}
|
|
else
|
|
{
|
|
server_enter_uninterrupted_section( &ldt_mutex, &sigset );
|
|
for (idx = first_ldt_entry; idx < LDT_SIZE; idx++)
|
|
{
|
|
if (__wine_ldt_copy.flags[idx]) continue;
|
|
ldt_set_entry( (idx << 3) | 7, entry );
|
|
break;
|
|
}
|
|
server_leave_uninterrupted_section( &ldt_mutex, &sigset );
|
|
if (idx == LDT_SIZE) return STATUS_TOO_MANY_THREADS;
|
|
}
|
|
thread_data->fs = (idx << 3) | 7;
|
|
}
|
|
else thread_data->fs = gdt_fs_sel;
|
|
|
|
return STATUS_SUCCESS;
|
|
}
|
|
|
|
|
|
/**********************************************************************
|
|
* signal_free_thread
|
|
*/
|
|
void signal_free_thread( TEB *teb )
|
|
{
|
|
struct x86_thread_data *thread_data = (struct x86_thread_data *)&teb->GdiTebBatch;
|
|
sigset_t sigset;
|
|
|
|
if (gdt_fs_sel) return;
|
|
|
|
server_enter_uninterrupted_section( &ldt_mutex, &sigset );
|
|
__wine_ldt_copy.flags[thread_data->fs >> 3] = 0;
|
|
server_leave_uninterrupted_section( &ldt_mutex, &sigset );
|
|
}
|
|
|
|
|
|
/**********************************************************************
|
|
* signal_init_thread
|
|
*/
|
|
void signal_init_thread( TEB *teb )
|
|
{
|
|
const WORD fpu_cw = 0x27f;
|
|
struct x86_thread_data *thread_data = (struct x86_thread_data *)&teb->GdiTebBatch;
|
|
|
|
ldt_set_fs( thread_data->fs, teb );
|
|
thread_data->gs = get_gs();
|
|
|
|
__asm__ volatile ("fninit; fldcw %0" : : "m" (fpu_cw));
|
|
}
|
|
|
|
|
|
/**********************************************************************
|
|
* signal_init_process
|
|
*/
|
|
void signal_init_process(void)
|
|
{
|
|
struct sigaction sig_act;
|
|
|
|
sig_act.sa_mask = server_block_set;
|
|
sig_act.sa_flags = SA_SIGINFO | SA_RESTART | SA_ONSTACK;
|
|
#ifdef __ANDROID__
|
|
sig_act.sa_flags |= SA_RESTORER;
|
|
sig_act.sa_restorer = rt_sigreturn;
|
|
#endif
|
|
sig_act.sa_sigaction = int_handler;
|
|
if (sigaction( SIGINT, &sig_act, NULL ) == -1) goto error;
|
|
sig_act.sa_sigaction = fpe_handler;
|
|
if (sigaction( SIGFPE, &sig_act, NULL ) == -1) goto error;
|
|
sig_act.sa_sigaction = abrt_handler;
|
|
if (sigaction( SIGABRT, &sig_act, NULL ) == -1) goto error;
|
|
sig_act.sa_sigaction = quit_handler;
|
|
if (sigaction( SIGQUIT, &sig_act, NULL ) == -1) goto error;
|
|
sig_act.sa_sigaction = usr1_handler;
|
|
if (sigaction( SIGUSR1, &sig_act, NULL ) == -1) goto error;
|
|
sig_act.sa_sigaction = trap_handler;
|
|
if (sigaction( SIGTRAP, &sig_act, NULL ) == -1) goto error;
|
|
sig_act.sa_sigaction = segv_handler;
|
|
if (sigaction( SIGSEGV, &sig_act, NULL ) == -1) goto error;
|
|
if (sigaction( SIGILL, &sig_act, NULL ) == -1) goto error;
|
|
if (sigaction( SIGBUS, &sig_act, NULL ) == -1) goto error;
|
|
return;
|
|
|
|
error:
|
|
perror("sigaction");
|
|
exit(1);
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* init_thread_context
|
|
*/
|
|
static void init_thread_context( CONTEXT *context, LPTHREAD_START_ROUTINE entry, void *arg )
|
|
{
|
|
context->SegCs = get_cs();
|
|
context->SegDs = get_ds();
|
|
context->SegEs = get_ds();
|
|
context->SegFs = get_fs();
|
|
context->SegGs = get_gs();
|
|
context->SegSs = get_ds();
|
|
context->EFlags = 0x202;
|
|
context->Eax = (DWORD)entry;
|
|
context->Ebx = (DWORD)arg;
|
|
context->Esp = (DWORD)NtCurrentTeb()->Tib.StackBase - 16;
|
|
context->Eip = (DWORD)pRtlUserThreadStart;
|
|
context->FloatSave.ControlWord = 0x27f;
|
|
((XSAVE_FORMAT *)context->ExtendedRegisters)->ControlWord = 0x27f;
|
|
((XSAVE_FORMAT *)context->ExtendedRegisters)->MxCsr = 0x1f80;
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* get_initial_context
|
|
*/
|
|
PCONTEXT DECLSPEC_HIDDEN get_initial_context( LPTHREAD_START_ROUTINE entry, void *arg, BOOL suspend )
|
|
{
|
|
CONTEXT *ctx;
|
|
|
|
if (suspend)
|
|
{
|
|
CONTEXT context = { CONTEXT_ALL };
|
|
|
|
init_thread_context( &context, entry, arg );
|
|
wait_suspend( &context );
|
|
ctx = (CONTEXT *)((ULONG_PTR)context.Esp & ~15) - 1;
|
|
*ctx = context;
|
|
}
|
|
else
|
|
{
|
|
ctx = (CONTEXT *)((char *)NtCurrentTeb()->Tib.StackBase - 16) - 1;
|
|
init_thread_context( ctx, entry, arg );
|
|
}
|
|
pthread_sigmask( SIG_UNBLOCK, &server_block_set, NULL );
|
|
ctx->ContextFlags = CONTEXT_FULL | CONTEXT_FLOATING_POINT | CONTEXT_EXTENDED_REGISTERS;
|
|
return ctx;
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* signal_start_thread
|
|
*/
|
|
__ASM_GLOBAL_FUNC( signal_start_thread,
|
|
"pushl %ebp\n\t"
|
|
__ASM_CFI(".cfi_adjust_cfa_offset 4\n\t")
|
|
__ASM_CFI(".cfi_rel_offset %ebp,0\n\t")
|
|
"movl %esp,%ebp\n\t"
|
|
__ASM_CFI(".cfi_def_cfa_register %ebp\n\t")
|
|
"pushl %ebx\n\t"
|
|
__ASM_CFI(".cfi_rel_offset %ebx,-4\n\t")
|
|
"pushl %esi\n\t"
|
|
__ASM_CFI(".cfi_rel_offset %esi,-8\n\t")
|
|
"pushl %edi\n\t"
|
|
__ASM_CFI(".cfi_rel_offset %edi,-12\n\t")
|
|
/* store exit frame */
|
|
"movl %ebp,%fs:0x1f4\n\t" /* x86_thread_data()->exit_frame */
|
|
/* switch to thread stack */
|
|
"movl %fs:4,%eax\n\t" /* NtCurrentTeb()->StackBase */
|
|
"leal -0x1004(%eax),%esp\n\t"
|
|
/* attach dlls */
|
|
"pushl 16(%ebp)\n\t" /* suspend */
|
|
"pushl 12(%ebp)\n\t" /* arg */
|
|
"pushl 8(%ebp)\n\t" /* entry */
|
|
"call " __ASM_NAME("get_initial_context") "\n\t"
|
|
"movl %eax,(%esp)\n\t" /* context */
|
|
"movl 20(%ebp),%edx\n\t" /* thunk */
|
|
"xorl %ebp,%ebp\n\t"
|
|
"pushl $0\n\t"
|
|
"jmp *%edx" )
|
|
|
|
|
|
/***********************************************************************
|
|
* signal_exit_thread
|
|
*/
|
|
__ASM_GLOBAL_FUNC( signal_exit_thread,
|
|
"movl 8(%esp),%ecx\n\t"
|
|
/* fetch exit frame */
|
|
"movl %fs:0x1f4,%edx\n\t" /* x86_thread_data()->exit_frame */
|
|
"testl %edx,%edx\n\t"
|
|
"jnz 1f\n\t"
|
|
"jmp *%ecx\n\t"
|
|
/* switch to exit frame stack */
|
|
"1:\tmovl 4(%esp),%eax\n\t"
|
|
"movl $0,%fs:0x1f4\n\t"
|
|
"movl %edx,%ebp\n\t"
|
|
__ASM_CFI(".cfi_def_cfa %ebp,4\n\t")
|
|
__ASM_CFI(".cfi_rel_offset %ebp,0\n\t")
|
|
__ASM_CFI(".cfi_rel_offset %ebx,-4\n\t")
|
|
__ASM_CFI(".cfi_rel_offset %esi,-8\n\t")
|
|
__ASM_CFI(".cfi_rel_offset %edi,-12\n\t")
|
|
"leal -20(%ebp),%esp\n\t"
|
|
"pushl %eax\n\t"
|
|
"call *%ecx" )
|
|
|
|
/**********************************************************************
|
|
* NtCurrentTeb (NTDLL.@)
|
|
*/
|
|
__ASM_STDCALL_FUNC( NtCurrentTeb, 0, ".byte 0x64\n\tmovl 0x18,%eax\n\tret" )
|
|
|
|
#endif /* __i386__ */
|