diff options
Diffstat (limited to 'libc/sysdeps/linux/i386/clone.S')
| -rw-r--r-- | libc/sysdeps/linux/i386/clone.S | 74 |
1 files changed, 24 insertions, 50 deletions
diff --git a/libc/sysdeps/linux/i386/clone.S b/libc/sysdeps/linux/i386/clone.S index 1ba3bcc48..fbbb7d4cf 100644 --- a/libc/sysdeps/linux/i386/clone.S +++ b/libc/sysdeps/linux/i386/clone.S @@ -1,4 +1,4 @@ -/* Copyright (C) 1996,1997,98,99,2000,02,03 Free Software Foundation, Inc. +/* Copyright (C) 1996-2000,02,03,04,2005 Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by Richard Henderson (rth@tamu.edu) @@ -24,8 +24,8 @@ */ #define _ERRNO_H 1 -#include <features.h> #include <bits/errno.h> +#include <sys/syscall.h> /* int clone(int (*fn)(void *arg), void *child_stack, int flags, void *arg, pid_t *ptid, struct user_desc *tls, pid_t *ctid); */ @@ -41,32 +41,35 @@ #define TLS PTID+PTR_SIZE #define CTID TLS+PTR_SIZE -#define __NR_clone 120 -#define __NR_exit 1 - .text -.type clone,@function; -.weak clone ; clone = __clone - -.type __clone,@function; -.globl __clone; - +.global __clone +.type __clone,%function __clone: /* Sanity check arguments. */ movl $-EINVAL,%eax /* no NULL function pointers */ movl FUNC(%esp),%ecx - jecxz .Lclone_error +#ifdef __PIC__ + jecxz __error +#else + testl %ecx,%ecx + jz __error +#endif /* no NULL stack pointers */ movl STACK(%esp),%ecx - jecxz .Lclone_error +#ifdef __PIC__ + jecxz __error +#else + testl %ecx,%ecx + jz __error +#endif /* Insert the argument onto the new stack. Make sure the new thread is started with an alignment of (mod 16). */ andl $0xfffffff0, %ecx - subl $24,%ecx + subl $28,%ecx movl ARG(%esp),%eax /* no negative argument counts */ movl %eax,12(%ecx) @@ -93,14 +96,13 @@ __clone: popl %ebx test %eax,%eax - jl .Lclone_error + jl __error jz .Lthread_start - -.Lpseudo_end: ret .Lthread_start: - subl %ebp,%ebp /* terminate the stack frame */ + /* Note: %esi is zero. */ + movl %esi,%ebp /* terminate the stack frame */ call *%ebx #ifdef __PIC__ call .Lhere @@ -112,38 +114,10 @@ __clone: movl $__NR_exit, %eax int $0x80 -#ifdef __PIC__ - -.Lthere: - movl (%esp), %ebx - ret - -.Lclone_error: - pushl %ebx - call .Lthere - addl $_GLOBAL_OFFSET_TABLE_, %ebx - xorl %edx, %edx - subl %eax, %edx - pushl %edx - call __errno_location@PLT - popl %ecx - popl %ebx - movl %ecx, (%eax) - orl $-1, %eax - jmp .Lpseudo_end - -#else /* __PIC__ */ - -.Lclone_error: - negl %eax - pushl %eax - call __errno_location - popl %ecx - movl %ecx, (%eax) - xorl %eax, %eax - decl %eax - -#endif +__error: + jmp __syscall_error .size __clone,.-__clone +.weak clone + clone = __clone |