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ntdll: Use syscall frame in x86 set_full_cpu_context implementation. 

Signed-off-by: Jacek Caban <jacek@codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>
This commit is contained in:
Jacek Caban 2021-02-25 18:54:24 +01:00 committed by Alexandre Julliard
parent b04f2689a2
commit 35e43ccf1b
1 changed files with 68 additions and 55 deletions
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123
dlls/ntdll/unix/signal_i386.c
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@ -820,16 +820,6 @@ static inline void restore_xstate( const CONTEXT *context )
}
/***********************************************************************
* signal_restore_full_cpu_context
*
* Restore full context from syscall frame
*/
void signal_restore_full_cpu_context(void)
{
}
/***********************************************************************
* fpux_to_fpu
*
@ -991,36 +981,36 @@ static inline void restore_context( const struct xcontext *xcontext, ucontext_t
*
* Set the new CPU context.
*/
extern void set_full_cpu_context( const CONTEXT *context );
extern void set_full_cpu_context(void);
__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 */
"movl %fs:0x1f8,%ecx\n\t"
"movl $0,%fs:0x1f8\n\t" /* x86_thread_data()->syscall_frame = NULL */
"movw 0x16(%ecx),%gs\n\t" /* SegGs */
"movw 0x14(%ecx),%fs\n\t" /* SegFs */
"movw 0x12(%ecx),%es\n\t" /* SegEs */
"movl 0x1c(%ecx),%ebx\n\t" /* Ebx */
"movl 0x28(%ecx),%edi\n\t" /* Edi */
"movl 0x2c(%ecx),%esi\n\t" /* Esi */
"movl 0x30(%ecx),%ebp\n\t" /* Ebp */
"movw %ss,%ax\n\t"
"cmpw 0xc8(%ecx),%ax\n\t" /* SegSs */
"cmpw 0x0e(%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 */
"movl 0x08(%ecx),%eax\n\t" /* Esp */
"leal -4*4(%eax),%eax\n\t"
"movl 0xc0(%ecx),%edx\n\t" /* EFlags */
"movl (%ecx),%edx\n\t" /* EFlags */
"movl %edx,3*4(%eax)\n\t"
"movl 0xbc(%ecx),%edx\n\t" /* SegCs */
"movl 0x0c(%ecx),%edx\n\t" /* SegCs */
"movl %edx,2*4(%eax)\n\t"
"movl 0xb8(%ecx),%edx\n\t" /* Eip */
"movl 0x04(%ecx),%edx\n\t" /* Eip */
"movl %edx,1*4(%eax)\n\t"
"movl 0xb0(%ecx),%edx\n\t" /* Eax */
"movl 0x18(%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 */
"pushl 0x10(%ecx)\n\t" /* SegDs */
"movl 0x24(%ecx),%edx\n\t" /* Edx */
"movl 0x20(%ecx),%ecx\n\t" /* Ecx */
"popl %ds\n\t"
"movl %eax,%esp\n\t"
"popl %eax\n\t"
@ -1030,19 +1020,30 @@ __ASM_GLOBAL_FUNC( set_full_cpu_context,
* 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 */
"movl 0x24(%ecx),%edx\n\t" /* Edx */
"movl 0x18(%ecx),%eax\n\t" /* Eax */
"movw 0x0e(%ecx),%ss\n\t" /* SegSs */
"movl 0x08(%ecx),%esp\n\t" /* Esp */
"pushl 0x00(%ecx)\n\t" /* EFlags */
"pushl 0x0c(%ecx)\n\t" /* SegCs */
"pushl 0x04(%ecx)\n\t" /* Eip */
"pushl 0x10(%ecx)\n\t" /* SegDs */
"movl 0x20(%ecx),%ecx\n\t" /* Ecx */
"popl %ds\n\t"
"iret" )
/***********************************************************************
* signal_restore_full_cpu_context
*
* Restore full context from syscall frame
*/
void signal_restore_full_cpu_context(void)
{
set_full_cpu_context();
}
/***********************************************************************
* get_server_context_flags
*
@ -1215,6 +1216,7 @@ NTSTATUS context_from_server( CONTEXT *to, const context_t *from )
NTSTATUS WINAPI NtSetContextThread( HANDLE handle, const CONTEXT *context )
{
NTSTATUS ret = STATUS_SUCCESS;
struct syscall_frame *frame = x86_thread_data()->syscall_frame;
DWORD flags = context->ContextFlags & ~CONTEXT_i386;
BOOL self = (handle == GetCurrentThread());
@ -1244,28 +1246,39 @@ NTSTATUS WINAPI NtSetContextThread( HANDLE handle, const CONTEXT *context )
}
}
if (flags & CONTEXT_INTEGER)
{
frame->eax = context->Eax;
frame->ebx = context->Ebx;
frame->ecx = context->Ecx;
frame->edx = context->Edx;
frame->esi = context->Esi;
frame->edi = context->Edi;
}
if (flags & CONTEXT_CONTROL)
{
frame->esp = context->Esp;
frame->ebp = context->Ebp;
frame->eip = context->Eip;
frame->eflags = context->EFlags;
frame->cs = context->SegCs;
frame->ss = context->SegSs;
}
if (flags & CONTEXT_SEGMENTS)
{
frame->ds = context->SegDs;
frame->es = context->SegEs;
frame->fs = context->SegFs;
frame->gs = context->SegGs;
}
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;
if (!(flags & CONTEXT_INTEGER)) frame->eax = STATUS_SUCCESS;
signal_restore_full_cpu_context();
return STATUS_SUCCESS;
}