diff options
Diffstat (limited to 'libc/sysdeps/linux/i386/__uClibc_syscall.S')
| -rw-r--r-- | libc/sysdeps/linux/i386/__uClibc_syscall.S | 72 |
1 files changed, 0 insertions, 72 deletions
diff --git a/libc/sysdeps/linux/i386/__uClibc_syscall.S b/libc/sysdeps/linux/i386/__uClibc_syscall.S deleted file mode 100644 index b79d2666e..000000000 --- a/libc/sysdeps/linux/i386/__uClibc_syscall.S +++ /dev/null @@ -1,72 +0,0 @@ -/* - * June 27, 2001 Manuel Novoa III - * - * This is a heavily modified version of gcc's output for the syscall5 macro. - * The idea (originally from dietlibc) is that all syscall functions simply - * set the syscall number in %al (since <= 255) and then jump here. All the - * common work is done by __uClibc_syscall, saving a fair amount of generated - * code where a number of syscalls are used. The (potential) cost is some - * unnecessary pushes, pops, and movs but the execution time penalty should - * be relatively small compared to the cost of the syscall itself. - * - * WARNING: If the startup code for uClibc changes, I suppose it is possible - * that this code might try to access memory under the bottom of - * the stack. - * WARNING: This will need to be modified if the number of syscalls ever - * exceeds 255. So will the associated syscall macros. - */ - -.text - .align 4 -.globl __uClibc_syscall - .type __uClibc_syscall,@function -__uClibc_syscall: - pushl %edi - pushl %esi - pushl %ebx - and $0xff,%eax - movl 16(%esp),%ebx - movl 20(%esp),%ecx - movl 24(%esp),%edx - movl 28(%esp),%esi - movl 32(%esp),%edi -#APP - int $0x80 -#NO_APP - cmpl $-4095,%eax - jbe .Ldone - -#ifdef PIC - call Lhere -Lhere: - popl %ebx - addl $_GLOBAL_OFFSET_TABLE_+[.-Lhere],%ebx - negl %eax - movl %eax,%ecx -#ifdef _LIBC_REENTRANT - call __errno_location@PLT -#else - movl errno@GOT(%ebx),%eax -#endif /* _LIBC_REENTRANT */ - movl %ecx,(%eax) -#else - negl %eax -#ifdef _LIBC_REENTRANT - movl %eax,%ecx - call __errno_location - movl %ecx,(%eax) -#else - movl %eax,errno -#endif /* _LIBC_REENTRANT */ - -#endif /* PIC */ - - movl $-1,%eax - .p2align 4,,7 -.Ldone: - popl %ebx - popl %esi - popl %edi - ret -.Lsize: - .size __uClibc_syscall,.Lsize-__uClibc_syscall |