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Preserve 16-byte stack alignment in 16-bit relays.

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This commit is contained in:
Alexandre Julliard 2005-11-28 17:39:05 +01:00
parent c367dc4f2e
commit 0d6a305047
1 changed files with 14 additions and 6 deletions
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20
tools/winebuild/spec16.c
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@ -286,7 +286,7 @@ static int get_function_argsize( const ORDDEF *odp )
static void output_call16_function( FILE *outfile, ORDDEF *odp )
{
char name[256];
int i, pos;
int i, pos, stack_words;
const char *args = odp->u.func.arg_types;
int argsize = get_function_argsize( odp );
int needs_ldt = strchr( args, 'p' ) || strchr( args, 't' );
@ -298,19 +298,25 @@ static void output_call16_function( FILE *outfile, ORDDEF *odp )
fprintf( outfile, "%s:\n", name );
fprintf( outfile, "\tpushl %%ebp\n" );
fprintf( outfile, "\tmovl %%esp,%%ebp\n" );
stack_words = 2;
if (needs_ldt)
{
fprintf( outfile, "\tpushl %%esi\n" );
stack_words++;
if (UsePIC)
{
fprintf( outfile, "\tcall 1f\n" );
fprintf( outfile, "1:\tpopl %%eax\n" );
fprintf( outfile, "\tmovl wine_ldt_copy_ptr-1b(%%eax),%%esi\n" );
fprintf( outfile, "\tcall %s\n", asm_name("__wine_spec_get_pc_thunk_eax") );
fprintf( outfile, "1:\tmovl wine_ldt_copy_ptr-1b(%%eax),%%esi\n" );
}
else
fprintf( outfile, "\tmovl $%s,%%esi\n", asm_name("wine_ldt_copy") );
}
/* preserve 16-byte stack alignment */
stack_words += strlen(args);
if ((odp->flags & FLAG_REGISTER) || (odp->type == TYPE_VARARGS)) stack_words++;
if (stack_words % 4) fprintf( outfile, "\tsubl $%d,%%esp\n", 16 - 4 * (stack_words % 4) );
if (args[0] || odp->type == TYPE_VARARGS)
fprintf( outfile, "\tmovl 12(%%ebp),%%ecx\n" ); /* args */
@ -456,6 +462,7 @@ static void output_init_code( FILE *outfile, const DLLSPEC *spec, const char *he
fprintf( outfile, "\t.align 4\n" );
fprintf( outfile, "\t%s\n", func_declaration(name) );
fprintf( outfile, "%s:\n", name );
fprintf( outfile, "subl $4,%%esp\n" );
if (UsePIC)
{
fprintf( outfile, "\tcall %s\n", asm_name("__wine_spec_get_pc_thunk_eax") );
@ -470,7 +477,7 @@ static void output_init_code( FILE *outfile, const DLLSPEC *spec, const char *he
fprintf( outfile, "\tpushl $%s\n", header_name );
}
fprintf( outfile, "\tcall %s\n", asm_name("__wine_dll_register_16") );
fprintf( outfile, "\taddl $8,%%esp\n" );
fprintf( outfile, "\taddl $12,%%esp\n" );
fprintf( outfile, "\tret\n" );
output_function_size( outfile, name );
@ -479,6 +486,7 @@ static void output_init_code( FILE *outfile, const DLLSPEC *spec, const char *he
fprintf( outfile, "\t.align 4\n" );
fprintf( outfile, "\t%s\n", func_declaration(name) );
fprintf( outfile, "%s:\n", name );
fprintf( outfile, "subl $8,%%esp\n" );
if (UsePIC)
{
fprintf( outfile, "\tcall %s\n", asm_name("__wine_spec_get_pc_thunk_eax") );
@ -490,7 +498,7 @@ static void output_init_code( FILE *outfile, const DLLSPEC *spec, const char *he
fprintf( outfile, "\tpushl $%s\n", header_name );
}
fprintf( outfile, "\tcall %s\n", asm_name("__wine_dll_unregister_16") );
fprintf( outfile, "\taddl $4,%%esp\n" );
fprintf( outfile, "\taddl $12,%%esp\n" );
fprintf( outfile, "\tret\n" );
output_function_size( outfile, name );