diff options
Diffstat (limited to 'mdk-stage1/dietlibc/i386/mmap64.S')
| -rw-r--r-- | mdk-stage1/dietlibc/i386/mmap64.S | 63 |
1 files changed, 63 insertions, 0 deletions
diff --git a/mdk-stage1/dietlibc/i386/mmap64.S b/mdk-stage1/dietlibc/i386/mmap64.S new file mode 100644 index 000000000..421325260 --- /dev/null +++ b/mdk-stage1/dietlibc/i386/mmap64.S @@ -0,0 +1,63 @@ +#include <dietfeatures.h> +#include <syscalls.h> +#include <errno.h> + +#ifdef __DYN_LIB +#ifndef WANT_THREAD_SAFE +#define WANT_THREAD_SAFE +#endif +#endif + +.text +.global mmap64 +.type mmap64,@function +mmap64: +/* man is this ugly! */ + push %ebp + push %edi + push %esi + push %ebx + movl %esp, %edi + movl 0x28(%edi), %eax + movl 0x2c(%edi), %edx + testl $0xfff, %eax /* offset in pages */ + jnz .Leinval + shrdl $12, %edx, %eax + shrl $12, %edx + jnz .Leinval + movl %eax, %ebp + movl 0x14(%edi),%ebx + movl 0x18(%edi),%ecx + movl 0x1c(%edi),%edx + movl 0x20(%edi),%esi + movl 0x24(%edi),%edi + movl $__NR_mmap2,%eax + int $0x80 + cmp $-124,%eax + jbe .Lnoerror + neg %eax +.Lerror: +#ifdef WANT_THREAD_SAFE + movl %eax,%ebx +#ifdef __DYN_LIB + call __errno_location@PLT +#else + call __errno_location +#endif + movl %ebx,(%eax) + orl $-1,%eax +#else + mov %eax,errno + sbb %eax,%eax # eax = eax - eax - CY = -1 +#endif +.Lnoerror: + pop %ebx + pop %esi + pop %edi + pop %ebp + ret +.Leinval: + movl $EINVAL,%eax + jmp .Lerror +.Lende2: +.size mmap64,.Lende2-mmap64 |