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Preliminary version of the context support for x86-64.

This commit is contained in:
Alexandre Julliard 2005-09-16 18:59:23 +00:00
parent 06ea6e6e3f
commit 5a12dd17ae
2 changed files with 348 additions and 0 deletions
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1
server/Makefile.in
View File

@ -15,6 +15,7 @@ C_SRCS = \
context_i386.c \
context_powerpc.c \
context_sparc.c \
context_x86_64.c \
debugger.c \
event.c \
fd.c \

347
server/context_x86_64.c Normal file
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@ -0,0 +1,347 @@
/*
* x86-64 register context support
*
* Copyright (C) 1999, 2005 Alexandre Julliard
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "config.h"
#ifdef __x86_64__
#include <assert.h>
#include <errno.h>
#include <stdarg.h>
#include <unistd.h>
#ifdef HAVE_SYS_PTRACE_H
# include <sys/ptrace.h>
#endif
#ifdef HAVE_SYS_PARAM_H
# include <sys/param.h>
#endif
#define NONAMELESSUNION
#include "windef.h"
#include "winbase.h"
#include "file.h"
#include "thread.h"
#include "request.h"
#ifdef __linux__
#ifdef HAVE_SYS_USER_H
# include <sys/user.h>
#endif
/* debug register offset in struct user */
#define DR_OFFSET(dr) ((unsigned long)((((struct user *)0)->u_debugreg) + (dr)))
/* retrieve a debug register */
static inline int get_debug_reg( int pid, int num, DWORD64 *data )
{
int res;
errno = 0;
res = ptrace( PTRACE_PEEKUSER, pid, DR_OFFSET(num), 0 );
if ((res == -1) && errno)
{
file_set_error();
return -1;
}
*data = res;
return 0;
}
/* retrieve a thread context */
static void get_thread_context( struct thread *thread, unsigned int flags, CONTEXT *context )
{
int pid = get_ptrace_pid(thread);
if (flags & CONTEXT_FULL)
{
struct user_regs_struct regs;
if (ptrace( PTRACE_GETREGS, pid, 0, &regs ) == -1) goto error;
if (flags & CONTEXT_INTEGER)
{
context->Rax = regs.rax;
context->Rbx = regs.rbx;
context->Rcx = regs.rcx;
context->Rdx = regs.rdx;
context->Rsi = regs.rsi;
context->Rdi = regs.rdi;
context->R8 = regs.r8;
context->R9 = regs.r9;
context->R10 = regs.r10;
context->R11 = regs.r11;
context->R12 = regs.r12;
context->R13 = regs.r13;
context->R14 = regs.r14;
context->R15 = regs.r15;
}
if (flags & CONTEXT_CONTROL)
{
context->Rbp = regs.rbp;
context->Rsp = regs.rsp;
context->Rip = regs.rip;
context->SegCs = regs.cs;
context->SegSs = regs.ss;
context->EFlags = regs.eflags;
}
if (flags & CONTEXT_SEGMENTS)
{
context->SegDs = regs.ds;
context->SegEs = regs.es;
context->SegFs = regs.fs;
context->SegGs = regs.gs;
}
}
if (flags & CONTEXT_DEBUG_REGISTERS)
{
if (get_debug_reg( pid, 0, &context->Dr0 ) == -1) goto error;
if (get_debug_reg( pid, 1, &context->Dr1 ) == -1) goto error;
if (get_debug_reg( pid, 2, &context->Dr2 ) == -1) goto error;
if (get_debug_reg( pid, 3, &context->Dr3 ) == -1) goto error;
if (get_debug_reg( pid, 6, &context->Dr6 ) == -1) goto error;
if (get_debug_reg( pid, 7, &context->Dr7 ) == -1) goto error;
}
if (flags & CONTEXT_FLOATING_POINT)
{
/* we can use context->FloatSave directly as it is using the */
/* correct structure (the same as fsave/frstor) */
if (ptrace( PTRACE_GETFPREGS, pid, 0, &context->u.FltSave ) == -1) goto error;
}
return;
error:
file_set_error();
}
/* set a thread context */
static void set_thread_context( struct thread *thread, unsigned int flags, const CONTEXT *context )
{
int pid = get_ptrace_pid(thread);
if (flags & CONTEXT_FULL)
{
struct user_regs_struct regs;
/* need to preserve some registers (at a minimum orig_eax must always be preserved) */
if (ptrace( PTRACE_GETREGS, pid, 0, &regs ) == -1) goto error;
if (flags & CONTEXT_INTEGER)
{
regs.rax = context->Rax;
regs.rbx = context->Rbx;
regs.rcx = context->Rcx;
regs.rdx = context->Rdx;
regs.rsi = context->Rsi;
regs.rdi = context->Rdi;
regs.r8 = context->R8;
regs.r9 = context->R9;
regs.r10 = context->R10;
regs.r11 = context->R11;
regs.r12 = context->R12;
regs.r13 = context->R13;
regs.r14 = context->R14;
regs.r15 = context->R15;
}
if (flags & CONTEXT_CONTROL)
{
regs.rbp = context->Rbp;
regs.rip = context->Rip;
regs.rsp = context->Rsp;
regs.cs = context->SegCs;
regs.ss = context->SegSs;
regs.eflags = context->EFlags;
}
if (flags & CONTEXT_SEGMENTS)
{
regs.ds = context->SegDs;
regs.es = context->SegEs;
regs.fs = context->SegFs;
regs.gs = context->SegGs;
}
if (ptrace( PTRACE_SETREGS, pid, 0, &regs ) == -1) goto error;
}
if (flags & CONTEXT_DEBUG_REGISTERS)
{
if (ptrace( PTRACE_POKEUSER, pid, DR_OFFSET(0), context->Dr0 ) == -1) goto error;
if (ptrace( PTRACE_POKEUSER, pid, DR_OFFSET(1), context->Dr1 ) == -1) goto error;
if (ptrace( PTRACE_POKEUSER, pid, DR_OFFSET(2), context->Dr2 ) == -1) goto error;
if (ptrace( PTRACE_POKEUSER, pid, DR_OFFSET(3), context->Dr3 ) == -1) goto error;
if (ptrace( PTRACE_POKEUSER, pid, DR_OFFSET(6), context->Dr6 ) == -1) goto error;
if (ptrace( PTRACE_POKEUSER, pid, DR_OFFSET(7), context->Dr7 ) == -1) goto error;
}
if (flags & CONTEXT_FLOATING_POINT)
{
/* we can use context->FloatSave directly as it is using the */
/* correct structure (the same as fsave/frstor) */
if (ptrace( PTRACE_SETFPREGS, pid, 0, &context->u.FltSave ) == -1) goto error;
}
return;
error:
file_set_error();
}
#else /* linux */
#error You must implement get/set_thread_context for your platform
#endif /* linux */
/* copy a context structure according to the flags */
static void copy_context( CONTEXT *to, const CONTEXT *from, int flags )
{
if (flags & CONTEXT_CONTROL)
{
to->Rbp = from->Rbp;
to->Rip = from->Rip;
to->Rsp = from->Rsp;
to->SegCs = from->SegCs;
to->SegSs = from->SegSs;
to->EFlags = from->EFlags;
to->MxCsr = from->MxCsr;
}
if (flags & CONTEXT_INTEGER)
{
to->Rax = from->Rax;
to->Rcx = from->Rcx;
to->Rdx = from->Rdx;
to->Rbx = from->Rbx;
to->Rsi = from->Rsi;
to->Rdi = from->Rdi;
to->R8 = from->R8;
to->R9 = from->R9;
to->R10 = from->R10;
to->R11 = from->R11;
to->R12 = from->R12;
to->R13 = from->R13;
to->R14 = from->R14;
to->R15 = from->R15;
}
if (flags & CONTEXT_SEGMENTS)
{
to->SegDs = from->SegDs;
to->SegEs = from->SegEs;
to->SegFs = from->SegFs;
to->SegGs = from->SegGs;
}
if (flags & CONTEXT_FLOATING_POINT)
{
to->u.FltSave = from->u.FltSave;
}
/* we don't bother copying the debug registers, since they */
/* always need to be accessed by ptrace anyway */
}
/* retrieve the current instruction pointer of a thread */
void *get_thread_ip( struct thread *thread )
{
CONTEXT context;
context.Rip = 0;
if (suspend_for_ptrace( thread ))
{
get_thread_context( thread, CONTEXT_CONTROL, &context );
resume_after_ptrace( thread );
}
return (void *)context.Rip;
}
/* determine if we should continue the thread in single-step mode */
int get_thread_single_step( struct thread *thread )
{
CONTEXT context;
if (thread->context) return 0; /* don't single-step inside exception event */
get_thread_context( thread, CONTEXT_CONTROL, &context );
return (context.EFlags & 0x100) != 0;
}
/* send a signal to a specific thread */
int tkill( int pid, int sig )
{
#ifdef __linux__
int ret;
__asm__( "syscall" : "=a" (ret)
: "0" (200) /*SYS_tkill*/, "D" (pid), "S" (sig) );
if (ret >= 0) return ret;
errno = -ret;
return -1;
#else
errno = ENOSYS;
return -1;
#endif
}
/* retrieve the current context of a thread */
DECL_HANDLER(get_thread_context)
{
struct thread *thread;
void *data;
int flags = req->flags & ~CONTEXT_AMD64; /* get rid of CPU id */
if (get_reply_max_size() < sizeof(CONTEXT))
{
set_error( STATUS_INVALID_PARAMETER );
return;
}
if (!(thread = get_thread_from_handle( req->handle, THREAD_GET_CONTEXT ))) return;
if ((data = set_reply_data_size( sizeof(CONTEXT) )))
{
/* copy incoming context into reply */
memset( data, 0, sizeof(CONTEXT) );
memcpy( data, get_req_data(), min( get_req_data_size(), sizeof(CONTEXT) ));
if (thread->context) /* thread is inside an exception event */
{
copy_context( data, thread->context, flags );
flags &= CONTEXT_DEBUG_REGISTERS;
}
if (flags && suspend_for_ptrace( thread ))
{
get_thread_context( thread, flags, data );
resume_after_ptrace( thread );
}
}
release_object( thread );
}
/* set the current context of a thread */
DECL_HANDLER(set_thread_context)
{
struct thread *thread;
int flags = req->flags & ~CONTEXT_AMD64; /* get rid of CPU id */
if (get_req_data_size() < sizeof(CONTEXT))
{
set_error( STATUS_INVALID_PARAMETER );
return;
}
if ((thread = get_thread_from_handle( req->handle, THREAD_SET_CONTEXT )))
{
if (thread->context) /* thread is inside an exception event */
{
copy_context( thread->context, get_req_data(), flags );
flags &= CONTEXT_DEBUG_REGISTERS;
}
if (flags && suspend_for_ptrace( thread ))
{
set_thread_context( thread, flags, get_req_data() );
resume_after_ptrace( thread );
}
release_object( thread );
}
}
#endif /* __x86_64__ */