995 lines
30 KiB
C
995 lines
30 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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#ifdef __i386__
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#include "config.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 <stdio.h>
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#include <unistd.h>
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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_VM86_H
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# include <sys/vm86.h>
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#endif
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#include "winnt.h"
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#include "selectors.h"
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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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typedef struct
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{
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unsigned short sc_gs, __gsh;
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unsigned short sc_fs, __fsh;
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unsigned short sc_es, __esh;
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unsigned short sc_ds, __dsh;
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unsigned long sc_edi;
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unsigned long sc_esi;
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unsigned long sc_ebp;
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unsigned long sc_esp;
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unsigned long sc_ebx;
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unsigned long sc_edx;
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unsigned long sc_ecx;
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unsigned long sc_eax;
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unsigned long sc_trapno;
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unsigned long sc_err;
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unsigned long sc_eip;
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unsigned short sc_cs, __csh;
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unsigned long sc_eflags;
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unsigned long esp_at_signal;
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unsigned short sc_ss, __ssh;
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unsigned long i387;
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unsigned long oldmask;
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unsigned long cr2;
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} SIGCONTEXT;
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#define HANDLER_DEF(name) void name( int __signal, SIGCONTEXT __context )
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#define HANDLER_CONTEXT (&__context)
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/* this is the sigaction structure from the Linux 2.1.20 kernel. */
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struct kernel_sigaction
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{
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void (*ksa_handler)();
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unsigned long ksa_mask;
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unsigned long ksa_flags;
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void *ksa_restorer;
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};
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/* Similar to the sigaction function in libc, except it leaves alone the
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restorer field, which is used to specify the signal stack address */
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static inline int wine_sigaction( int sig, struct kernel_sigaction *new,
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struct kernel_sigaction *old )
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{
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__asm__ __volatile__( "pushl %%ebx\n\t"
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"movl %2,%%ebx\n\t"
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"int $0x80\n\t"
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"popl %%ebx"
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: "=a" (sig)
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: "0" (SYS_sigaction), "r" (sig), "c" (new), "d" (old) );
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if (sig>=0) return 0;
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errno = -sig;
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return -1;
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}
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#ifdef HAVE_SIGALTSTACK
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/* direct syscall for sigaltstack to work around glibc 2.0 brain-damage */
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static inline int wine_sigaltstack( const struct sigaltstack *new,
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struct sigaltstack *old )
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{
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int ret;
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__asm__ __volatile__( "pushl %%ebx\n\t"
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"movl %2,%%ebx\n\t"
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"int $0x80\n\t"
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"popl %%ebx"
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: "=a" (ret)
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: "0" (SYS_sigaltstack), "r" (new), "c" (old) );
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if (ret >= 0) return 0;
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errno = -ret;
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return -1;
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}
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#endif
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int vm86_enter( struct vm86plus_struct *ptr );
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void vm86_return();
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__ASM_GLOBAL_FUNC(vm86_enter,
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"pushl %ebp\n\t"
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"movl %esp, %ebp\n\t"
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"movl $166,%eax\n\t" /*SYS_vm86*/
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"pushl %fs\n\t"
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"movl 8(%ebp),%ecx\n\t"
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"pushl %ebx\n\t"
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"movl $1,%ebx\n\t" /*VM86_ENTER*/
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"pushl %ecx\n\t" /* put vm86plus_struct ptr somewhere we can find it */
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"int $0x80\n"
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".globl " __ASM_NAME("vm86_return") "\n\t"
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".type " __ASM_NAME("vm86_return") ",@function\n"
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__ASM_NAME("vm86_return") ":\n\t"
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"popl %ecx\n\t"
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"popl %ebx\n\t"
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"popl %fs\n\t"
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"popl %ebp\n\t"
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"ret" );
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#endif /* linux */
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#ifdef BSDI
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#define EAX_sig(context) ((context)->tf_eax)
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#define EBX_sig(context) ((context)->tf_ebx)
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#define ECX_sig(context) ((context)->tf_ecx)
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#define EDX_sig(context) ((context)->tf_edx)
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#define ESI_sig(context) ((context)->tf_esi)
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#define EDI_sig(context) ((context)->tf_edi)
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#define EBP_sig(context) ((context)->tf_ebp)
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#define CS_sig(context) ((context)->tf_cs)
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#define DS_sig(context) ((context)->tf_ds)
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#define ES_sig(context) ((context)->tf_es)
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#define SS_sig(context) ((context)->tf_ss)
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#include <machine/frame.h>
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typedef struct trapframe SIGCONTEXT;
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#define HANDLER_DEF(name) void name( int __signal, int code, SIGCONTEXT *__context )
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#define HANDLER_CONTEXT __context
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#define EFL_sig(context) ((context)->tf_eflags)
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#define EIP_sig(context) (*((unsigned long*)&(context)->tf_eip))
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#define ESP_sig(context) (*((unsigned long*)&(context)->tf_esp))
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#endif /* bsdi */
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#if defined(__NetBSD__) || defined(__FreeBSD__) || defined(__OpenBSD__)
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typedef struct sigcontext SIGCONTEXT;
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#define HANDLER_DEF(name) void name( int __signal, int code, SIGCONTEXT *__context )
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#define HANDLER_CONTEXT __context
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#endif /* FreeBSD */
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#if defined(__svr4__) || defined(_SCO_DS) || defined(__sun)
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#ifdef _SCO_DS
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#include <sys/regset.h>
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#endif
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/* Solaris kludge */
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#undef ERR
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#include <sys/ucontext.h>
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#undef ERR
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typedef struct ucontext SIGCONTEXT;
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#define HANDLER_DEF(name) void name( int __signal, void *__siginfo, SIGCONTEXT *__context )
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#define HANDLER_CONTEXT __context
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#endif /* svr4 || SCO_DS */
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#ifdef __EMX__
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typedef struct
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{
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unsigned long ContextFlags;
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FLOATING_SAVE_AREA sc_float;
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unsigned long sc_gs;
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unsigned long sc_fs;
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unsigned long sc_es;
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unsigned long sc_ds;
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unsigned long sc_edi;
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unsigned long sc_esi;
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unsigned long sc_eax;
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unsigned long sc_ebx;
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unsigned long sc_ecx;
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unsigned long sc_edx;
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unsigned long sc_ebp;
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unsigned long sc_eip;
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unsigned long sc_cs;
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unsigned long sc_eflags;
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unsigned long sc_esp;
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unsigned long sc_ss;
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} SIGCONTEXT;
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#endif /* __EMX__ */
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#if defined(linux) || defined(__NetBSD__) || defined(__FreeBSD__) || defined(__OpenBSD__) || defined(__EMX__)
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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 SS_sig(context) ((context)->sc_ss)
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/* FS and GS are now in the sigcontext struct of FreeBSD, but not
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* saved by the exception handling. duh.
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* Actually they are in -current (have been for a while), and that
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* patch now finally has been MFC'd to -stable too (Nov 15 1999).
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* If you're running a system from the -stable branch older than that,
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* like a 3.3-RELEASE, grab the patch from the ports tree:
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* ftp://ftp.freebsd.org/pub/FreeBSD/FreeBSD-current/ports/emulators/wine/files/patch-3.3-sys-fsgs
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* (If its not yet there when you look, go here:
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* http://www.jelal.kn-bremen.de/freebsd/ports/emulators/wine/files/ )
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*/
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#ifdef __FreeBSD__
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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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#endif
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#ifdef linux
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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 CR2_sig(context) ((context)->cr2)
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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 FPU_sig(context) ((FLOATING_SAVE_AREA*)((context)->i387))
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#endif
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#ifndef __FreeBSD__
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#define EFL_sig(context) ((context)->sc_eflags)
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#else
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#define EFL_sig(context) ((context)->sc_efl)
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/* FreeBSD, see i386/i386/traps.c::trap_pfault va->err kludge */
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#define CR2_sig(context) ((context)->sc_err)
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#define TRAP_sig(context) ((context)->sc_trapno)
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#endif
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#define EIP_sig(context) (*((unsigned long*)&(context)->sc_eip))
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#define ESP_sig(context) (*((unsigned long*)&(context)->sc_esp))
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#endif /* linux || __NetBSD__ || __FreeBSD__ || __OpenBSD__ */
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#if defined(__svr4__) || defined(_SCO_DS) || defined(__sun)
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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 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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#ifdef TRAPNO
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#define TRAP_sig(context) ((context)->uc_mcontext.gregs[TRAPNO])
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#endif
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#endif /* svr4 || SCO_DS */
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/* exception code definitions (already defined by FreeBSD) */
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#ifndef __FreeBSD__ /* FIXME: other BSDs? */
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#define T_DIVIDE 0 /* Division by zero exception */
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#define T_TRCTRAP 1 /* Single-step exception */
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#define T_NMI 2 /* NMI interrupt */
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#define T_BPTFLT 3 /* Breakpoint exception */
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#define T_OFLOW 4 /* Overflow exception */
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#define T_BOUND 5 /* Bound range exception */
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#define T_PRIVINFLT 6 /* Invalid opcode exception */
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#define T_DNA 7 /* Device not available exception */
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#define T_DOUBLEFLT 8 /* Double fault exception */
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#define T_FPOPFLT 9 /* Coprocessor segment overrun */
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#define T_TSSFLT 10 /* Invalid TSS exception */
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#define T_SEGNPFLT 11 /* Segment not present exception */
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#define T_STKFLT 12 /* Stack fault */
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#define T_PROTFLT 13 /* General protection fault */
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#define T_PAGEFLT 14 /* Page fault */
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#define T_RESERVED 15 /* Unknown exception */
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#define T_ARITHTRAP 16 /* Floating point exception */
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#define T_ALIGNFLT 17 /* Alignment check exception */
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#define T_MCHK 18 /* Machine check exception */
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#define T_CACHEFLT 19 /* Cache flush exception */
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#endif
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#define T_UNKNOWN (-1) /* Unknown fault (TRAP_sig not defined) */
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#include "wine/exception.h"
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#include "winnt.h"
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#include "stackframe.h"
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#include "global.h"
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#include "miscemu.h"
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#include "ntddk.h"
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#include "syslevel.h"
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#include "debugtools.h"
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DEFAULT_DEBUG_CHANNEL(seh);
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/***********************************************************************
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* get_trap_code
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*
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* Get the trap code for a signal.
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*/
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static inline int get_trap_code( const SIGCONTEXT *sigcontext )
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{
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#ifdef TRAP_sig
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return TRAP_sig(sigcontext);
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#else
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return T_UNKNOWN; /* unknown trap code */
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#endif
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}
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/***********************************************************************
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* get_error_code
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*
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* Get the error code for a signal.
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*/
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static inline int get_error_code( const SIGCONTEXT *sigcontext )
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{
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#ifdef ERROR_sig
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return ERROR_sig(sigcontext);
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#else
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return 0;
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#endif
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}
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/***********************************************************************
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* get_cr2_value
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*
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* Get the CR2 value for a signal.
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*/
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static inline void *get_cr2_value( const SIGCONTEXT *sigcontext )
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{
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#ifdef CR2_sig
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return (void *)CR2_sig(sigcontext);
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#else
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return NULL;
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#endif
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}
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/***********************************************************************
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* save_context
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*
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* Set the register values from a sigcontext.
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*/
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static void save_context( CONTEXT *context, const SIGCONTEXT *sigcontext )
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{
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WORD fs;
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/* get %fs at time of the fault */
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#ifdef FS_sig
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fs = FS_sig(sigcontext);
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#else
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fs = __get_fs();
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#endif
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context->SegFs = fs;
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/* now restore a proper %fs for the fault handler */
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if (!IS_SELECTOR_SYSTEM(CS_sig(sigcontext))) /* 16-bit mode */
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{
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fs = SYSLEVEL_Win16CurrentTeb;
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}
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#ifdef linux
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else if ((void *)EIP_sig(sigcontext) == vm86_return) /* vm86 mode */
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{
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/* retrieve pointer to vm86plus struct that was stored in vm86_enter */
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struct vm86plus_struct *vm86 = *(struct vm86plus_struct **)ESP_sig(sigcontext);
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/* fetch the saved %fs on the stack */
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fs = *((unsigned int *)ESP_sig(sigcontext) + 2);
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__set_fs(fs);
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/* get context from vm86 struct */
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context->Eax = vm86->regs.eax;
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context->Ebx = vm86->regs.ebx;
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context->Ecx = vm86->regs.ecx;
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context->Edx = vm86->regs.edx;
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context->Esi = vm86->regs.esi;
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context->Edi = vm86->regs.edi;
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context->Esp = vm86->regs.esp;
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context->Ebp = vm86->regs.ebp;
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context->Eip = vm86->regs.eip;
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context->SegCs = vm86->regs.cs;
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context->SegDs = vm86->regs.ds;
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context->SegEs = vm86->regs.es;
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context->SegFs = vm86->regs.fs;
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context->SegGs = vm86->regs.gs;
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context->SegSs = vm86->regs.ss;
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context->EFlags = vm86->regs.eflags;
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return;
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}
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#endif /* linux */
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if (!fs)
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{
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fs = SYSLEVEL_EmergencyTeb;
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__set_fs(fs);
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ERR("fallback to emergency TEB\n");
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}
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__set_fs(fs);
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context->Eax = EAX_sig(sigcontext);
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context->Ebx = EBX_sig(sigcontext);
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context->Ecx = ECX_sig(sigcontext);
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context->Edx = EDX_sig(sigcontext);
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context->Esi = ESI_sig(sigcontext);
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context->Edi = EDI_sig(sigcontext);
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context->Ebp = EBP_sig(sigcontext);
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context->EFlags = EFL_sig(sigcontext);
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context->Eip = EIP_sig(sigcontext);
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context->Esp = ESP_sig(sigcontext);
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context->SegCs = LOWORD(CS_sig(sigcontext));
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context->SegDs = LOWORD(DS_sig(sigcontext));
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context->SegEs = LOWORD(ES_sig(sigcontext));
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context->SegSs = LOWORD(SS_sig(sigcontext));
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#ifdef GS_sig
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context->SegGs = LOWORD(GS_sig(sigcontext));
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#else
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context->SegGs = __get_gs();
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#endif
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}
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/***********************************************************************
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* restore_context
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*
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* Build a sigcontext from the register values.
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*/
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static void restore_context( const CONTEXT *context, SIGCONTEXT *sigcontext )
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{
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#ifdef linux
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/* check if exception occurred in vm86 mode */
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if ((void *)EIP_sig(sigcontext) == vm86_return &&
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IS_SELECTOR_SYSTEM(CS_sig(sigcontext)))
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{
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/* retrieve pointer to vm86plus struct that was stored in vm86_enter */
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struct vm86plus_struct *vm86 = *(struct vm86plus_struct **)ESP_sig(sigcontext);
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vm86->regs.eax = context->Eax;
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vm86->regs.ebx = context->Ebx;
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vm86->regs.ecx = context->Ecx;
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vm86->regs.edx = context->Edx;
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vm86->regs.esi = context->Esi;
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vm86->regs.edi = context->Edi;
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vm86->regs.esp = context->Esp;
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vm86->regs.ebp = context->Ebp;
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|
vm86->regs.eip = context->Eip;
|
|
vm86->regs.cs = context->SegCs;
|
|
vm86->regs.ds = context->SegDs;
|
|
vm86->regs.es = context->SegEs;
|
|
vm86->regs.fs = context->SegFs;
|
|
vm86->regs.gs = context->SegGs;
|
|
vm86->regs.ss = context->SegSs;
|
|
vm86->regs.eflags = context->EFlags;
|
|
return;
|
|
}
|
|
#endif /* linux */
|
|
|
|
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;
|
|
SS_sig(sigcontext) = context->SegSs;
|
|
#ifdef FS_sig
|
|
FS_sig(sigcontext) = context->SegFs;
|
|
#else
|
|
__set_fs( context->SegFs );
|
|
#endif
|
|
#ifdef GS_sig
|
|
GS_sig(sigcontext) = context->SegGs;
|
|
#else
|
|
__set_gs( context->SegGs );
|
|
#endif
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* save_fpu
|
|
*
|
|
* Set the FPU context from a sigcontext.
|
|
*/
|
|
inline static void save_fpu( CONTEXT *context, const SIGCONTEXT *sigcontext )
|
|
{
|
|
#ifdef FPU_sig
|
|
if (FPU_sig(sigcontext))
|
|
{
|
|
context->FloatSave = *FPU_sig(sigcontext);
|
|
return;
|
|
}
|
|
#endif /* FPU_sig */
|
|
#ifdef __GNUC__
|
|
__asm__ __volatile__( "fnsave %0; fwait" : "=m" (context->FloatSave) );
|
|
#endif /* __GNUC__ */
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* restore_fpu
|
|
*
|
|
* Restore the FPU context to a sigcontext.
|
|
*/
|
|
inline static void restore_fpu( CONTEXT *context, const SIGCONTEXT *sigcontext )
|
|
{
|
|
/* reset the current interrupt status */
|
|
context->FloatSave.StatusWord &= context->FloatSave.ControlWord | 0xffffff80;
|
|
#ifdef FPU_sig
|
|
if (FPU_sig(sigcontext))
|
|
{
|
|
*FPU_sig(sigcontext) = context->FloatSave;
|
|
return;
|
|
}
|
|
#endif /* FPU_sig */
|
|
#ifdef __GNUC__
|
|
/* avoid nested exceptions */
|
|
__asm__ __volatile__( "frstor %0; fwait" : : "m" (context->FloatSave) );
|
|
#endif /* __GNUC__ */
|
|
}
|
|
|
|
|
|
/**********************************************************************
|
|
* 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;
|
|
|
|
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 */
|
|
}
|
|
|
|
|
|
/**********************************************************************
|
|
* do_segv
|
|
*
|
|
* Implementation of SIGSEGV handler.
|
|
*/
|
|
static void do_segv( CONTEXT *context, int trap_code, void *cr2, int err_code )
|
|
{
|
|
EXCEPTION_RECORD rec;
|
|
DWORD page_fault_code = EXCEPTION_ACCESS_VIOLATION;
|
|
|
|
#ifdef CR2_sig
|
|
/* we want the page-fault case to be fast */
|
|
if (trap_code == T_PAGEFLT)
|
|
if (!(page_fault_code = VIRTUAL_HandleFault( cr2 ))) return;
|
|
#endif
|
|
|
|
rec.ExceptionRecord = NULL;
|
|
rec.ExceptionFlags = EXCEPTION_CONTINUABLE;
|
|
rec.ExceptionAddress = (LPVOID)context->Eip;
|
|
rec.NumberParameters = 0;
|
|
|
|
switch(trap_code)
|
|
{
|
|
case T_OFLOW: /* Overflow exception */
|
|
rec.ExceptionCode = EXCEPTION_INT_OVERFLOW;
|
|
break;
|
|
case T_BOUND: /* Bound range exception */
|
|
rec.ExceptionCode = EXCEPTION_ARRAY_BOUNDS_EXCEEDED;
|
|
break;
|
|
case T_PRIVINFLT: /* Invalid opcode exception */
|
|
rec.ExceptionCode = EXCEPTION_ILLEGAL_INSTRUCTION;
|
|
break;
|
|
case T_STKFLT: /* Stack fault */
|
|
rec.ExceptionCode = EXCEPTION_STACK_OVERFLOW;
|
|
break;
|
|
case T_SEGNPFLT: /* Segment not present exception */
|
|
case T_PROTFLT: /* General protection fault */
|
|
case T_UNKNOWN: /* Unknown fault code */
|
|
if (INSTR_EmulateInstruction( context )) return;
|
|
rec.ExceptionCode = EXCEPTION_PRIV_INSTRUCTION;
|
|
break;
|
|
case T_PAGEFLT: /* Page fault */
|
|
#ifdef CR2_sig
|
|
rec.NumberParameters = 2;
|
|
rec.ExceptionInformation[0] = (err_code & 2) != 0;
|
|
rec.ExceptionInformation[1] = (DWORD)cr2;
|
|
#endif /* CR2_sig */
|
|
rec.ExceptionCode = page_fault_code;
|
|
break;
|
|
case T_ALIGNFLT: /* Alignment check exception */
|
|
/* FIXME: pass through exception handler first? */
|
|
if (context->EFlags & 0x00040000)
|
|
{
|
|
/* Disable AC flag, return */
|
|
context->EFlags &= ~0x00040000;
|
|
return;
|
|
}
|
|
rec.ExceptionCode = EXCEPTION_DATATYPE_MISALIGNMENT;
|
|
break;
|
|
default:
|
|
ERR( "Got unexpected trap %d\n", trap_code );
|
|
/* fall through */
|
|
case T_NMI: /* NMI interrupt */
|
|
case T_DNA: /* Device not available exception */
|
|
case T_DOUBLEFLT: /* Double fault exception */
|
|
case T_TSSFLT: /* Invalid TSS exception */
|
|
case T_RESERVED: /* Unknown exception */
|
|
case T_MCHK: /* Machine check exception */
|
|
#ifdef T_CACHEFLT
|
|
case T_CACHEFLT: /* Cache flush exception */
|
|
#endif
|
|
rec.ExceptionCode = EXCEPTION_ILLEGAL_INSTRUCTION;
|
|
break;
|
|
}
|
|
EXC_RtlRaiseException( &rec, context );
|
|
}
|
|
|
|
|
|
/**********************************************************************
|
|
* do_trap
|
|
*
|
|
* Implementation of SIGTRAP handler.
|
|
*/
|
|
static void do_trap( CONTEXT *context, int trap_code )
|
|
{
|
|
EXCEPTION_RECORD rec;
|
|
|
|
rec.ExceptionFlags = EXCEPTION_CONTINUABLE;
|
|
rec.ExceptionRecord = NULL;
|
|
rec.ExceptionAddress = (LPVOID)context->Eip;
|
|
rec.NumberParameters = 0;
|
|
|
|
switch(trap_code)
|
|
{
|
|
case T_TRCTRAP: /* Single-step exception */
|
|
rec.ExceptionCode = EXCEPTION_SINGLE_STEP;
|
|
context->EFlags &= ~0x100; /* clear single-step flag */
|
|
break;
|
|
case T_BPTFLT: /* Breakpoint exception */
|
|
rec.ExceptionAddress = (char *)rec.ExceptionAddress - 1; /* back up over the int3 instruction */
|
|
/* fall through */
|
|
default:
|
|
rec.ExceptionCode = EXCEPTION_BREAKPOINT;
|
|
break;
|
|
}
|
|
EXC_RtlRaiseException( &rec, context );
|
|
}
|
|
|
|
|
|
/**********************************************************************
|
|
* do_fpe
|
|
*
|
|
* Implementation of SIGFPE handler
|
|
*/
|
|
static void do_fpe( CONTEXT *context, int trap_code )
|
|
{
|
|
EXCEPTION_RECORD rec;
|
|
|
|
switch(trap_code)
|
|
{
|
|
case T_DIVIDE: /* Division by zero exception */
|
|
rec.ExceptionCode = EXCEPTION_INT_DIVIDE_BY_ZERO;
|
|
break;
|
|
case T_FPOPFLT: /* Coprocessor segment overrun */
|
|
rec.ExceptionCode = EXCEPTION_FLT_INVALID_OPERATION;
|
|
break;
|
|
case T_ARITHTRAP: /* Floating point exception */
|
|
case T_UNKNOWN: /* Unknown fault code */
|
|
rec.ExceptionCode = get_fpu_code( context );
|
|
break;
|
|
default:
|
|
ERR( "Got unexpected trap %d\n", trap_code );
|
|
rec.ExceptionCode = EXCEPTION_FLT_INVALID_OPERATION;
|
|
break;
|
|
}
|
|
rec.ExceptionFlags = EXCEPTION_CONTINUABLE;
|
|
rec.ExceptionRecord = NULL;
|
|
rec.ExceptionAddress = (LPVOID)context->Eip;
|
|
rec.NumberParameters = 0;
|
|
EXC_RtlRaiseException( &rec, context );
|
|
}
|
|
|
|
|
|
/**********************************************************************
|
|
* segv_handler
|
|
*
|
|
* Handler for SIGSEGV and related errors.
|
|
*/
|
|
static HANDLER_DEF(segv_handler)
|
|
{
|
|
CONTEXT context;
|
|
save_context( &context, HANDLER_CONTEXT );
|
|
do_segv( &context, get_trap_code(HANDLER_CONTEXT),
|
|
get_cr2_value(HANDLER_CONTEXT), get_error_code(HANDLER_CONTEXT) );
|
|
restore_context( &context, HANDLER_CONTEXT );
|
|
}
|
|
|
|
|
|
/**********************************************************************
|
|
* trap_handler
|
|
*
|
|
* Handler for SIGTRAP.
|
|
*/
|
|
static HANDLER_DEF(trap_handler)
|
|
{
|
|
CONTEXT context;
|
|
save_context( &context, HANDLER_CONTEXT );
|
|
do_trap( &context, get_trap_code(HANDLER_CONTEXT) );
|
|
restore_context( &context, HANDLER_CONTEXT );
|
|
}
|
|
|
|
|
|
/**********************************************************************
|
|
* fpe_handler
|
|
*
|
|
* Handler for SIGFPE.
|
|
*/
|
|
static HANDLER_DEF(fpe_handler)
|
|
{
|
|
CONTEXT context;
|
|
save_fpu( &context, HANDLER_CONTEXT );
|
|
save_context( &context, HANDLER_CONTEXT );
|
|
do_fpe( &context, get_trap_code(HANDLER_CONTEXT) );
|
|
restore_context( &context, HANDLER_CONTEXT );
|
|
restore_fpu( &context, HANDLER_CONTEXT );
|
|
}
|
|
|
|
|
|
/**********************************************************************
|
|
* int_handler
|
|
*
|
|
* Handler for SIGINT.
|
|
*/
|
|
static HANDLER_DEF(int_handler)
|
|
{
|
|
EXCEPTION_RECORD rec;
|
|
CONTEXT context;
|
|
|
|
save_context( &context, HANDLER_CONTEXT );
|
|
rec.ExceptionCode = CONTROL_C_EXIT;
|
|
rec.ExceptionFlags = EXCEPTION_CONTINUABLE;
|
|
rec.ExceptionRecord = NULL;
|
|
rec.ExceptionAddress = (LPVOID)context.Eip;
|
|
rec.NumberParameters = 0;
|
|
EXC_RtlRaiseException( &rec, &context );
|
|
restore_context( &context, HANDLER_CONTEXT );
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* set_handler
|
|
*
|
|
* Set a signal handler
|
|
*/
|
|
static int set_handler( int sig, int have_sigaltstack, void (*func)() )
|
|
{
|
|
struct sigaction sig_act;
|
|
|
|
#ifdef linux
|
|
if (!have_sigaltstack && NtCurrentTeb()->signal_stack)
|
|
{
|
|
struct kernel_sigaction sig_act;
|
|
sig_act.ksa_handler = func;
|
|
sig_act.ksa_flags = SA_RESTART | SA_NOMASK;
|
|
sig_act.ksa_mask = 0;
|
|
/* point to the top of the stack */
|
|
sig_act.ksa_restorer = (char *)NtCurrentTeb()->signal_stack + SIGNAL_STACK_SIZE;
|
|
return wine_sigaction( sig, &sig_act, NULL );
|
|
}
|
|
#endif /* linux */
|
|
sig_act.sa_handler = func;
|
|
sigemptyset( &sig_act.sa_mask );
|
|
|
|
#ifdef linux
|
|
sig_act.sa_flags = SA_RESTART | SA_NOMASK;
|
|
#elif defined (__svr4__) || defined(_SCO_DS)
|
|
sig_act.sa_flags = SA_SIGINFO | SA_RESTART;
|
|
#else
|
|
sig_act.sa_flags = 0;
|
|
#endif
|
|
|
|
#ifdef SA_ONSTACK
|
|
if (have_sigaltstack) sig_act.sa_flags |= SA_ONSTACK;
|
|
#endif
|
|
return sigaction( sig, &sig_act, NULL );
|
|
}
|
|
|
|
|
|
/**********************************************************************
|
|
* SIGNAL_Init
|
|
*/
|
|
BOOL SIGNAL_Init(void)
|
|
{
|
|
int have_sigaltstack = 0;
|
|
|
|
#ifdef HAVE_SIGALTSTACK
|
|
struct sigaltstack ss;
|
|
if ((ss.ss_sp = NtCurrentTeb()->signal_stack))
|
|
{
|
|
ss.ss_size = SIGNAL_STACK_SIZE;
|
|
ss.ss_flags = 0;
|
|
if (!sigaltstack(&ss, NULL)) have_sigaltstack = 1;
|
|
#ifdef linux
|
|
/* sigaltstack may fail because the kernel is too old, or
|
|
because glibc is brain-dead. In the latter case a
|
|
direct system call should succeed. */
|
|
else if (!wine_sigaltstack(&ss, NULL)) have_sigaltstack = 1;
|
|
#endif /* linux */
|
|
}
|
|
#endif /* HAVE_SIGALTSTACK */
|
|
|
|
/* automatic child reaping to avoid zombies */
|
|
signal( SIGCHLD, SIG_IGN );
|
|
|
|
if (set_handler( SIGINT, have_sigaltstack, (void (*)())int_handler ) == -1) goto error;
|
|
if (set_handler( SIGFPE, have_sigaltstack, (void (*)())fpe_handler ) == -1) goto error;
|
|
if (set_handler( SIGSEGV, have_sigaltstack, (void (*)())segv_handler ) == -1) goto error;
|
|
if (set_handler( SIGILL, have_sigaltstack, (void (*)())segv_handler ) == -1) goto error;
|
|
#ifdef SIGBUS
|
|
if (set_handler( SIGBUS, have_sigaltstack, (void (*)())segv_handler ) == -1) goto error;
|
|
#endif
|
|
#ifdef SIGTRAP
|
|
if (set_handler( SIGTRAP, have_sigaltstack, (void (*)())trap_handler ) == -1) goto error;
|
|
#endif
|
|
return TRUE;
|
|
|
|
error:
|
|
perror("sigaction");
|
|
return FALSE;
|
|
}
|
|
|
|
|
|
#ifdef linux
|
|
/**********************************************************************
|
|
* __wine_enter_vm86
|
|
*
|
|
* Enter vm86 mode with the specified register context.
|
|
*/
|
|
void __wine_enter_vm86( CONTEXT *context )
|
|
{
|
|
EXCEPTION_RECORD rec;
|
|
int res;
|
|
struct vm86plus_struct vm86;
|
|
|
|
memset( &vm86, 0, sizeof(vm86) );
|
|
for (;;)
|
|
{
|
|
vm86.regs.eax = context->Eax;
|
|
vm86.regs.ebx = context->Ebx;
|
|
vm86.regs.ecx = context->Ecx;
|
|
vm86.regs.edx = context->Edx;
|
|
vm86.regs.esi = context->Esi;
|
|
vm86.regs.edi = context->Edi;
|
|
vm86.regs.esp = context->Esp;
|
|
vm86.regs.ebp = context->Ebp;
|
|
vm86.regs.eip = context->Eip;
|
|
vm86.regs.cs = context->SegCs;
|
|
vm86.regs.ds = context->SegDs;
|
|
vm86.regs.es = context->SegEs;
|
|
vm86.regs.fs = context->SegFs;
|
|
vm86.regs.gs = context->SegGs;
|
|
vm86.regs.ss = context->SegSs;
|
|
vm86.regs.eflags = context->EFlags;
|
|
|
|
do
|
|
{
|
|
res = vm86_enter( &vm86 );
|
|
if (res < 0)
|
|
{
|
|
errno = -res;
|
|
return;
|
|
}
|
|
} while (VM86_TYPE(res) == VM86_SIGNAL);
|
|
|
|
context->Eax = vm86.regs.eax;
|
|
context->Ebx = vm86.regs.ebx;
|
|
context->Ecx = vm86.regs.ecx;
|
|
context->Edx = vm86.regs.edx;
|
|
context->Esi = vm86.regs.esi;
|
|
context->Edi = vm86.regs.edi;
|
|
context->Esp = vm86.regs.esp;
|
|
context->Ebp = vm86.regs.ebp;
|
|
context->Eip = vm86.regs.eip;
|
|
context->SegCs = vm86.regs.cs;
|
|
context->SegDs = vm86.regs.ds;
|
|
context->SegEs = vm86.regs.es;
|
|
context->SegFs = vm86.regs.fs;
|
|
context->SegGs = vm86.regs.gs;
|
|
context->SegSs = vm86.regs.ss;
|
|
context->EFlags = vm86.regs.eflags;
|
|
|
|
switch(VM86_TYPE(res))
|
|
{
|
|
case VM86_UNKNOWN: /* unhandled GP fault - IO-instruction or similar */
|
|
do_segv( context, T_PROTFLT, 0, 0 );
|
|
continue;
|
|
case VM86_TRAP: /* return due to DOS-debugger request */
|
|
do_trap( context, VM86_ARG(res) );
|
|
continue;
|
|
case VM86_INTx: /* int3/int x instruction (ARG = x) */
|
|
rec.ExceptionCode = EXCEPTION_VM86_INTx;
|
|
break;
|
|
case VM86_STI: /* sti/popf/iret instruction enabled virtual interrupts */
|
|
rec.ExceptionCode = EXCEPTION_VM86_STI;
|
|
break;
|
|
case VM86_PICRETURN: /* return due to pending PIC request */
|
|
rec.ExceptionCode = EXCEPTION_VM86_PICRETURN;
|
|
break;
|
|
default:
|
|
ERR( "unhandled result from vm86 mode %x\n", res );
|
|
continue;
|
|
}
|
|
rec.ExceptionFlags = EXCEPTION_CONTINUABLE;
|
|
rec.ExceptionRecord = NULL;
|
|
rec.ExceptionAddress = (LPVOID)context->Eip;
|
|
rec.NumberParameters = 1;
|
|
rec.ExceptionInformation[0] = VM86_ARG(res);
|
|
EXC_RtlRaiseException( &rec, context );
|
|
}
|
|
}
|
|
|
|
#else /* linux */
|
|
void __wine_enter_vm86( CONTEXT *context )
|
|
{
|
|
MESSAGE("vm86 mode not supported on this platform\n");
|
|
}
|
|
#endif /* linux */
|
|
|
|
/**********************************************************************
|
|
* DbgBreakPoint (NTDLL)
|
|
*/
|
|
void WINAPI DbgBreakPoint(void);
|
|
__ASM_GLOBAL_FUNC( DbgBreakPoint, "int $3; ret");
|
|
|
|
/**********************************************************************
|
|
* DbgUserBreakPoint (NTDLL)
|
|
*/
|
|
void WINAPI DbgUserBreakPoint(void);
|
|
__ASM_GLOBAL_FUNC( DbgUserBreakPoint, "int $3; ret");
|
|
|
|
#endif /* __i386__ */
|