diff options
Diffstat (limited to 'linuxthreads/sysdeps/unix/sysv/linux/arm')
| -rw-r--r-- | linuxthreads/sysdeps/unix/sysv/linux/arm/sysdep-cancel.h | 19 | ||||
| -rw-r--r-- | linuxthreads/sysdeps/unix/sysv/linux/arm/vfork.S | 57 |
2 files changed, 70 insertions, 6 deletions
diff --git a/linuxthreads/sysdeps/unix/sysv/linux/arm/sysdep-cancel.h b/linuxthreads/sysdeps/unix/sysv/linux/arm/sysdep-cancel.h index 5f3709f742..38e472d2ba 100644 --- a/linuxthreads/sysdeps/unix/sysv/linux/arm/sysdep-cancel.h +++ b/linuxthreads/sysdeps/unix/sysv/linux/arm/sysdep-cancel.h @@ -27,6 +27,7 @@ # undef PSEUDO_RET # define PSEUDO_RET \ ldrcc pc, [sp], $4; \ + ldr lr, [sp], $4; \ b PLTJMP(SYSCALL_ERROR) # undef PSEUDO @@ -34,7 +35,7 @@ .section ".text"; \ PSEUDO_PROLOGUE; \ ENTRY (name) \ - SINGLE_THREAD_P; \ + SINGLE_THREAD_P_INT; \ bne .Lpseudo_cancel; \ DO_CALL (syscall_name, args); \ cmn r0, $4096; \ @@ -74,7 +75,7 @@ # define UNDOC2ARGS_4 # define DOCARGS_5 stmfd sp!, {r0-r3} -# define UNDOCARGS_5 str r4, [sp, #-4]!; ldmfd sp, {r0-r4} +# define UNDOCARGS_5 ldmfd sp, {r0-r3}; str r4, [sp, #-4]!; ldr r4, [sp, #24] # define UNDOC2ARGS_5 ldr r4, [sp], #20 # ifdef IS_IN_libpthread @@ -92,10 +93,11 @@ extern int __local_multiple_threads attribute_hidden; # define SINGLE_THREAD_P __builtin_expect (__local_multiple_threads == 0, 1) # else # if !defined PIC -# define SINGLE_THREAD_P \ +# define SINGLE_THREAD_P_INT \ ldr ip, =__local_multiple_threads; \ ldr ip, [ip]; \ teq ip, #0; +# define SINGLE_THREAD_P SINGLE_THREAD_P_INT # define MAYBE_SAVE_LR \ str lr, [sp, $-4]!; # define PSEUDO_RET_MOV \ @@ -103,14 +105,19 @@ extern int __local_multiple_threads attribute_hidden; b PLTJMP(SYSCALL_ERROR) # define PSEUDO_PROLOGUE # else -# define SINGLE_THREAD_P \ - str lr, [sp, $-4]!; \ +# define SINGLE_THREAD_P_PIC(reg) \ ldr ip, 1b; \ - ldr lr, 2b; \ + ldr reg, 2b; \ 3: \ add ip, pc, ip; \ ldr ip, [ip, lr]; \ teq ip, #0; +# define SINGLE_THREAD_P_INT \ + str lr, [sp, $-4]!; \ + SINGLE_THREAD_P_PIC(lr) +# define SINGLE_THREAD_P \ + SINGLE_THREAD_P_INT; \ + ldr lr, [sp], $4 # define PSEUDO_PROLOGUE \ 1: .word _GLOBAL_OFFSET_TABLE_ - 3f - 8; \ 2: .word __local_multiple_threads(GOTOFF); diff --git a/linuxthreads/sysdeps/unix/sysv/linux/arm/vfork.S b/linuxthreads/sysdeps/unix/sysv/linux/arm/vfork.S new file mode 100644 index 0000000000..6092bd9fd4 --- /dev/null +++ b/linuxthreads/sysdeps/unix/sysv/linux/arm/vfork.S @@ -0,0 +1,57 @@ +/* Copyright (C) 1999, 2002, 2003 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by Philip Blundell <philb@gnu.org>. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, write to the Free + Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA + 02111-1307 USA. */ + +#include <sysdep-cancel.h> +#define _ERRNO_H 1 +#include <bits/errno.h> + +/* Clone the calling process, but without copying the whole address +pace. + 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, + and the process ID of the new process to the old process. */ + + PSEUDO_PROLOGUE + +ENTRY (__vfork) + +#ifdef __NR_vfork + SINGLE_THREAD_P + bne HIDDEN_JUMPTARGET (__fork) + swi __NR_vfork + cmn a1, #4096 + RETINSTR(movcc, pc, lr) + + /* Check if vfork syscall is known at all. */ + ldr a2, =-ENOSYS + teq a1, a2 + bne PLTJMP(C_SYMBOL_NAME(__syscall_error)) +#endif + + /* If we don't have vfork, fork is close enough. */ + swi __NR_fork + cmn a1, #4096 + RETINSTR(movcc, pc, lr) + b PLTJMP(C_SYMBOL_NAME(__syscall_error)) + +PSEUDO_END (__vfork) +libc_hidden_def (__vfork) + +weak_alias (__vfork, vfork) |