diff options
Diffstat (limited to 'linuxthreads/sysdeps/unix/sysv')
| -rw-r--r-- | linuxthreads/sysdeps/unix/sysv/linux/arm/vfork.S | 39 |
1 files changed, 31 insertions, 8 deletions
diff --git a/linuxthreads/sysdeps/unix/sysv/linux/arm/vfork.S b/linuxthreads/sysdeps/unix/sysv/linux/arm/vfork.S index 8d3338afd0..23687342d1 100644 --- a/linuxthreads/sysdeps/unix/sysv/linux/arm/vfork.S +++ b/linuxthreads/sysdeps/unix/sysv/linux/arm/vfork.S @@ -20,37 +20,60 @@ #include <sysdep-cancel.h> #define _ERRNO_H 1 #include <bits/errno.h> +#include <kernel-features.h> -/* Clone the calling process, but without copying the whole address -pace. +/* 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 -rocess, + 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. */ PSEUDO_PROLOGUE ENTRY (__vfork) - SINGLE_THREAD_P - bne HIDDEN_JUMPTARGET (__fork) #ifdef __NR_vfork + +#ifdef SHARED + ldr ip, 1f + ldr r0, 2f +3: add ip, pc, ip + ldr r0, [ip, r0] +#else + ldr r0, 1f +#endif + movs r0, r0 + bne HIDDEN_JUMPTARGET (__fork) + swi __NR_vfork cmn a1, #4096 RETINSTR(movcc, pc, lr) +#ifndef __ASSUME_VFORK_SYSCALL /* Check if vfork syscall is known at all. */ - ldr a2, =-ENOSYS - teq a1, a2 + cmn a1, #ENOSYS bne PLTJMP(C_SYMBOL_NAME(__syscall_error)) #endif +#endif + +#ifndef __ASSUME_VFORK_SYSCALL /* If we don't have vfork, fork is close enough. */ swi __NR_fork cmn a1, #4096 RETINSTR(movcc, pc, lr) +#elif !defined __NR_vfork +# error "__NR_vfork not available and __ASSUME_VFORK_SYSCALL defined" +#endif b PLTJMP(C_SYMBOL_NAME(__syscall_error)) +#ifdef SHARED +1: .word _GLOBAL_OFFSET_TABLE_ - 3b - 8 +2: .word __libc_pthread_functions(GOTOFF) +#else + .weak pthread_create +1: .word pthread_create +#endif + PSEUDO_END (__vfork) libc_hidden_def (__vfork) |