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preloader: Use the SYS_mmap2 system call instead of the old SYS_mmap one. 

Signed-off-by: Alexandre Julliard <julliard@winehq.org>
This commit is contained in:
Alexandre Julliard 2017-04-27 15:04:03 +02:00
parent 1172754fcb
commit 45a632ee81
1 changed files with 31 additions and 24 deletions
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55
loader/preloader.c
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@ -291,30 +291,37 @@ static inline int wld_mprotect( const void *addr, size_t len, int prot )
return SYSCALL_RET(ret);
}
static void *wld_mmap( void *start, size_t len, int prot, int flags, int fd, off_t offset )
{
int ret;
struct
{
void *addr;
unsigned int length;
unsigned int prot;
unsigned int flags;
unsigned int fd;
unsigned int offset;
} args;
args.addr = start;
args.length = len;
args.prot = prot;
args.flags = flags;
args.fd = fd;
args.offset = offset;
__asm__ __volatile__( "pushl %%ebx; movl %2,%%ebx; int $0x80; popl %%ebx"
: "=a" (ret) : "0" (90 /* SYS_mmap */), "q" (&args) : "memory" );
return (void *)SYSCALL_RET(ret);
}
void *wld_mmap( void *start, size_t len, int prot, int flags, int fd, unsigned int offset );
__ASM_GLOBAL_FUNC(wld_mmap,
"\tpushl %ebp\n"
__ASM_CFI(".cfi_adjust_cfa_offset 4\n\t")
"\tpushl %ebx\n"
__ASM_CFI(".cfi_adjust_cfa_offset 4\n\t")
"\tpushl %esi\n"
__ASM_CFI(".cfi_adjust_cfa_offset 4\n\t")
"\tpushl %edi\n"
__ASM_CFI(".cfi_adjust_cfa_offset 4\n\t")
"\tmovl $192,%eax\n" /* SYS_mmap2 */
"\tmovl 20(%esp),%ebx\n" /* start */
"\tmovl 24(%esp),%ecx\n" /* len */
"\tmovl 28(%esp),%edx\n" /* prot */
"\tmovl 32(%esp),%esi\n" /* flags */
"\tmovl 36(%esp),%edi\n" /* fd */
"\tmovl 40(%esp),%ebp\n" /* offset */
"\tshrl $12,%ebp\n"
"\tint $0x80\n"
"\tcmpl $-4096,%eax\n"
"\tjbe 1f\n"
"\tmovl $-1,%eax\n"
"1:\tpopl %edi\n"
__ASM_CFI(".cfi_adjust_cfa_offset -4\n\t")
"\tpopl %esi\n"
__ASM_CFI(".cfi_adjust_cfa_offset -4\n\t")
"\tpopl %ebx\n"
__ASM_CFI(".cfi_adjust_cfa_offset -4\n\t")
"\tpopl %ebp\n"
__ASM_CFI(".cfi_adjust_cfa_offset -4\n\t")
"\tret\n" )
static inline uid_t wld_getuid(void)
{