diff options
Diffstat (limited to 'libc/sysdeps/linux/x86_64/vfork.S')
| -rw-r--r-- | libc/sysdeps/linux/x86_64/vfork.S | 29 |
1 files changed, 21 insertions, 8 deletions
diff --git a/libc/sysdeps/linux/x86_64/vfork.S b/libc/sysdeps/linux/x86_64/vfork.S index 072a3a0a8..e3bd7d23d 100644 --- a/libc/sysdeps/linux/x86_64/vfork.S +++ b/libc/sysdeps/linux/x86_64/vfork.S @@ -18,15 +18,24 @@ #define _ERRNO_H 1 #include <bits/errno.h> +#include <sys/syscall.h> /* Clone the calling process, but without copying the whole address space. The calling process is suspended until the new process exits or is replaced by a call to `execve'. Return -1 for errors, 0 to the new process, and the process ID of the new process to the old process. */ -.globl __vfork; -.type __vfork,@function; -.align 16; +#ifndef __NR_vfork +#error wtf +/* No vfork so use fork instead */ +.weak vfork ; vfork = __libc_fork + +#else + +.text +.globl __vfork +.type __vfork,@function +.align 16 __vfork: /* Pop the return PC value into RDI. We need a register that @@ -41,13 +50,17 @@ __vfork: pushq %rdi cmpl $-4095, %eax - jae __syscall_error /* Branch forward if it failed. */ + jae __error /* Branch forward if it failed. */ /* Normal return. */ ret -__syscall_error: - /* TODO: implement this ! :D */ +__error: + jmp __syscall_error + +.size __vfork,.-__vfork + +.weak vfork + vfork = __vfork -.size __vfork,.Lsize-__vfork -.weak vfork ; vfork = __vfork +#endif /* __NR_vfork */ |