diff options
Diffstat (limited to 'libc/sysdeps/linux/i386/clone.S')
| -rw-r--r-- | libc/sysdeps/linux/i386/clone.S | 64 |
1 files changed, 38 insertions, 26 deletions
diff --git a/libc/sysdeps/linux/i386/clone.S b/libc/sysdeps/linux/i386/clone.S index dd39015fb..1ba3bcc48 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 Free Software Foundation, Inc. +/* Copyright (C) 1996,1997,98,99,2000,02,03 Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by Richard Henderson (rth@tamu.edu) @@ -18,15 +18,17 @@ 02111-1307 USA. */ /* clone() is even more special than fork() as it mucks with stacks - and invokes a function in the right context after its all over. - + and invokes a function in the right context after its all over. + Hacked up for uClibc by Erik Andersen <andersen@codepoet.org> */ #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); */ #define LINKAGE 4 #define PTR_SIZE 4 @@ -39,6 +41,8 @@ #define TLS PTID+PTR_SIZE #define CTID TLS+PTR_SIZE +#define __NR_clone 120 +#define __NR_exit 1 .text .type clone,@function; @@ -51,20 +55,13 @@ __clone: /* Sanity check arguments. */ movl $-EINVAL,%eax - movl FUNC(%esp),%ecx /* no NULL function pointers */ -#ifdef __PIC__ + /* no NULL function pointers */ + movl FUNC(%esp),%ecx jecxz .Lclone_error -#else - testl %ecx,%ecx - jz .Lclone_error -#endif - movl STACK(%esp),%ecx /* no NULL stack pointers */ -#ifdef __PIC__ + + /* no NULL stack pointers */ + movl STACK(%esp),%ecx jecxz .Lclone_error -#else - testl %ecx,%ecx - jz .Lclone_error -#endif /* Insert the argument onto the new stack. Make sure the new thread is started with an alignment of (mod 16). */ @@ -115,23 +112,38 @@ __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 -#ifdef __PIC__ - call .Lthere -.Lthere: - popl %ebx - addl $_GLOBAL_OFFSET_TABLE_+[.- .Lthere ], %ebx - call __errno_location@PLT -#else call __errno_location -#endif popl %ecx movl %ecx, (%eax) xorl %eax, %eax decl %eax -.Lsize: - .size __clone,.Lsize-__clone +#endif + +.size __clone,.-__clone |