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Implemented wine_ldt_alloc_fs and wine_ldt_init_fs for Mac OS.

This commit is contained in:
Alexandre Julliard 2005-08-29 10:56:54 +00:00
parent 9c708060d3
commit c486949985
1 changed files with 34 additions and 9 deletions
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43
libs/wine/ldt.c
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@ -117,6 +117,24 @@ extern int i386_get_ldt(int, union descriptor *, int);
extern int i386_set_ldt(int, union descriptor *, int);
#endif /* __NetBSD__ || __FreeBSD__ || __OpenBSD__ */
#ifdef __APPLE__
static inline int thread_set_user_ldt( const void *addr, unsigned int size, unsigned int flags )
{
int ret;
__asm__ __volatile__ ("pushl %4\n\t"
"pushl %3\n\t"
"pushl %2\n\t"
"pushl $0\n\t"
"lcall $0x3b,$0\n\t"
"leal 16(%%esp),%%esp"
: "=a" (ret)
: "0" (4 /*thread_set_user_ldt*/), "r" (addr), "r" (size), "r" (flags) );
return ret;
}
#endif /* __APPLE__ */
#endif /* __i386__ */
/* local copy of the LDT */
@ -382,7 +400,7 @@ void wine_ldt_free_entries( unsigned short sel, int count )
#ifdef __i386__
static int fs_gdt_index = -1; /* GDT index for %fs, or 0 if GDT not supported on this kernel */
static int global_fs_sel = -1; /* global selector for %fs shared among all threads */
/***********************************************************************
* wine_ldt_alloc_fs
@ -392,7 +410,7 @@ static int fs_gdt_index = -1; /* GDT index for %fs, or 0 if GDT not supported o
*/
unsigned short wine_ldt_alloc_fs(void)
{
if (fs_gdt_index == -1)
if (global_fs_sel == -1)
{
#ifdef __linux__
struct modify_ldt_s ldt_info;
@ -402,13 +420,17 @@ unsigned short wine_ldt_alloc_fs(void)
fill_modify_ldt_struct( &ldt_info, &null_entry );
if ((ret = set_thread_area( &ldt_info ) < 0))
{
fs_gdt_index = 0; /* don't try it again */
global_fs_sel = 0; /* don't try it again */
if (errno != ENOSYS) perror( "set_thread_area" );
}
else fs_gdt_index = ldt_info.entry_number;
#endif /* __linux__ */
else global_fs_sel = (ldt_info.entry_number << 3) | 3;
#elif defined(__APPLE__)
int ret = thread_set_user_ldt( NULL, 0, 0 );
if (ret != -1) global_fs_sel = ret;
else global_fs_sel = 0;
#endif /* __APPLE__ */
}
if (fs_gdt_index > 0) return (fs_gdt_index << 3) | 3;
if (global_fs_sel > 0) return global_fs_sel;
return wine_ldt_alloc_entries( 1 );
}
@ -423,17 +445,20 @@ unsigned short wine_ldt_alloc_fs(void)
*/
void wine_ldt_init_fs( unsigned short sel, const LDT_ENTRY *entry )
{
if (is_gdt_sel(sel))
if ((sel & ~3) == (global_fs_sel & ~3))
{
#ifdef __linux__
struct modify_ldt_s ldt_info;
int ret;
ldt_info.entry_number = sel >> 3;
assert( ldt_info.entry_number == fs_gdt_index );
fill_modify_ldt_struct( &ldt_info, entry );
if ((ret = set_thread_area( &ldt_info ) < 0)) perror( "set_thread_area" );
#endif /* __linux__ */
#elif defined(__APPLE__)
int ret = thread_set_user_ldt( wine_ldt_get_base(entry), wine_ldt_get_limit(entry), 0 );
if (ret == -1) perror( "thread_set_user_ldt" );
else assert( ret == global_fs_sel );
#endif /* __APPLE__ */
}
else /* LDT selector */
{