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ntdll: Restore all non-volatile i386 registers in syscall dispatcher. 

Based on set_full_cpu_context.

Signed-off-by: Jacek Caban <jacek@codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>
This commit is contained in:
Jacek Caban 2021-03-01 16:51:05 +01:00 committed by Alexandre Julliard
parent 4a384f4589
commit e341d1f695
1 changed files with 49 additions and 14 deletions
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63
tools/winebuild/import.c
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@ -1458,7 +1458,7 @@ static void output_syscall_dispatcher( int count, const char *variant )
output( "\tmovl %%ecx,-0x2c(%%ebp)\n" ); /* frame->eip */
output( "\tmovl %%esp,%%fs:0x1f8\n" ); /* x86_thread_data()->syscall_frame */
output( "\tcmpl $%u,%%eax\n", count );
output( "\tjae 3f\n" );
output( "\tjae 4f\n" );
if (UsePIC)
{
output( "\tmovl %%eax,%%edx\n" );
@ -1479,19 +1479,54 @@ static void output_syscall_dispatcher( int count, const char *variant )
else
output( "\tcall *.Lsyscall_table(,%%eax,4)\n" );
output( "2:\tmovl $0,%%fs:0x1f8\n" );
output( "\tmovl -0x14(%%ebp),%%ebx\n" );
output_cfi( ".cfi_same_value %%ebx\n" );
output( "\tmovl -0x08(%%ebp),%%edi\n" );
output_cfi( ".cfi_same_value %%edi\n" );
output( "\tmovl -0x04(%%ebp),%%esi\n" );
output_cfi( ".cfi_same_value %%esi\n" );
output( "\tmovl %%ebp,%%esp\n" );
output_cfi( ".cfi_def_cfa %%esp,8\n" );
output( "\tpopl %%ebp\n" );
output_cfi( ".cfi_adjust_cfa_offset -4\n" );
output_cfi( ".cfi_same_value %%ebp\n" );
output( "\tret\n" );
output( "3:\tmovl $0x%x,%%eax\n", invalid_param );
output( "\tleal -0x30(%%ebp),%%ebx\n" );
output_cfi( ".cfi_def_cfa_register %%ebx" );
output_cfi( ".cfi_adjust_cfa_offset 0x30\n" );
output( "\tmovl %%eax,0x18(%%ebx)\n" );
output( "\tmovw 0x16(%%ebx),%%gs\n" );
output( "\tmovw 0x14(%%ebx),%%fs\n" );
output( "\tmovw 0x12(%%ebx),%%es\n" );
output( "\tmovl 0x28(%%ebx),%%edi\n" );
output_cfi( ".cfi_same_value %%edi" );
output( "\tmovl 0x2c(%%ebx),%%esi\n" );
output_cfi( ".cfi_same_value %%esi" );
output( "\tmovl (%%ebp),%%ebp\n" );
output_cfi( ".cfi_same_value %%ebp" );
output( "\tmovw %%ss,%%cx\n" );
output( "\tcmpw 0x0e(%%ebx),%%cx\n" );
output( "\tjne 3f\n" );
/* 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. */
output( "\tmovl 0x08(%%ebx),%%ecx\n" );
output( "\tleal -3*4(%%ecx),%%ecx\n" );
output( "\tmovl (%%ebx),%%edx\n" );
output( "\tmovl %%edx,2*4(%%ecx)\n" );
output( "\tmovl 0x0c(%%ebx),%%edx\n" );
output( "\tmovl %%edx,1*4(%%ecx)\n" );
output( "\tmovl 0x04(%%ebx),%%edx\n" );
output( "\tmovl %%edx,0*4(%%ecx)\n" );
output( "\tpushl 0x10(%%ebx)\n" );
output( "\tmovl 0x1c(%%ebx),%%ebx\n" );
output_cfi( ".cfi_same_value %%ebx" );
output( "\tpopl %%ds\n" );
output( "\tmovl %%ecx,%%esp\n" );
output( "\tiret\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. */
output( "\t3:\tmovl 0x18(%%ebx),%%ecx\n" );
output( "\tmovw 0x0e(%%ebx),%%ss\n" );
output( "\tmovl 0x08(%%ebx),%%esp\n" );
output( "\tpushl 0x00(%%ebx)\n" );
output( "\tpushl 0x0c(%%ebx)\n" );
output( "\tpushl 0x04(%%ebx)\n" );
output( "\tpushl 0x10(%%ebx)\n" );
output( "\tmovl 0x1c(%%ebx),%%ebx\n" );
output( "\tpopl %%ds\n" );
output( "\tiret\n" );
output( "4:\tmovl $0x%x,%%eax\n", invalid_param );
output( "\tjmp 2b\n" );
break;
case CPU_x86_64: