diff options
Diffstat (limited to 'sysdeps/unix/sysv/linux/powerpc/powerpc32')
-rw-r--r-- | sysdeps/unix/sysv/linux/powerpc/powerpc32/sysdep.h | 61 | ||||
-rw-r--r-- | sysdeps/unix/sysv/linux/powerpc/powerpc32/vfork.S | 56 |
2 files changed, 74 insertions, 43 deletions
diff --git a/sysdeps/unix/sysv/linux/powerpc/powerpc32/sysdep.h b/sysdeps/unix/sysv/linux/powerpc/powerpc32/sysdep.h index e2d599c22b..b31c3db653 100644 --- a/sysdeps/unix/sysv/linux/powerpc/powerpc32/sysdep.h +++ b/sysdeps/unix/sysv/linux/powerpc/powerpc32/sysdep.h @@ -54,53 +54,29 @@ # include <errno.h> -/* On powerpc a system call basically clobbers the same registers like a - function call, with the exception of LR (which is needed for the - "sc; bnslr" sequence) and CR (where only CR0.SO is clobbered to signal - an error return status). */ - # undef INLINE_SYSCALL # define INLINE_SYSCALL(name, nr, args...) \ ({ \ - register long r0 __asm__ ("r0"); \ - register long r3 __asm__ ("r3"); \ - register long r4 __asm__ ("r4"); \ - register long r5 __asm__ ("r5"); \ - register long r6 __asm__ ("r6"); \ - register long r7 __asm__ ("r7"); \ - register long r8 __asm__ ("r8"); \ - register long r9 __asm__ ("r9"); \ - register long r10 __asm__ ("r10"); \ - register long r11 __asm__ ("r11"); \ - register long r12 __asm__ ("r12"); \ - long ret, err; \ - LOADARGS_##nr(name, args); \ - __asm__ __volatile__ \ - ("sc\n\t" \ - "mfcr %0" \ - : "=&r" (r0), \ - "=&r" (r3), "=&r" (r4), "=&r" (r5), "=&r" (r6), "=&r" (r7), \ - "=&r" (r8), "=&r" (r9), "=&r" (r10), "=&r" (r11), "=&r" (r12) \ - : ASM_INPUT_##nr \ - : "cr0", "ctr", "memory"); \ - err = r0; \ - ret = r3; \ - if (__builtin_expect (err & (1 << 28), 0)) \ + INTERNAL_SYSCALL_DECL (sc_err); \ + long sc_ret = INTERNAL_SYSCALL (name, sc_err, nr, args); \ + if (INTERNAL_SYSCALL_ERROR_P (sc_ret, sc_err)) \ { \ - __set_errno (ret); \ - ret = -1L; \ + __set_errno (INTERNAL_SYSCALL_ERRNO (sc_ret, sc_err)); \ + sc_ret = -1L; \ } \ - ret; \ + sc_ret; \ }) /* Define a macro which expands inline into the wrapper code for a system call. This use is for internal calls that do not need to handle errors - normally. It will never touch errno. This returns just what the kernel - gave back in the non-error (CR0.SO cleared) case, otherwise (CR0.SO set) - the negation of the return value in the kernel gets reverted. */ + normally. It will never touch errno. + On powerpc a system call basically clobbers the same registers like a + function call, with the exception of LR (which is needed for the + "sc; bnslr+" sequence) and CR (where only CR0.SO is clobbered to signal + an error return status). */ # undef INTERNAL_SYSCALL_DECL -# define INTERNAL_SYSCALL_DECL(err) do { } while (0) +# define INTERNAL_SYSCALL_DECL(err) long err # undef INTERNAL_SYSCALL # define INTERNAL_SYSCALL(name, err, nr, args...) \ @@ -118,24 +94,23 @@ register long r12 __asm__ ("r12"); \ LOADARGS_##nr(name, args); \ __asm__ __volatile__ \ - ("sc\n\t" \ - "bns+ 0f\n\t" \ - "neg %1,%1\n" \ - "0:" \ + ("sc \n\t" \ + "mfcr %0" \ : "=&r" (r0), \ "=&r" (r3), "=&r" (r4), "=&r" (r5), "=&r" (r6), "=&r" (r7), \ "=&r" (r8), "=&r" (r9), "=&r" (r10), "=&r" (r11), "=&r" (r12) \ : ASM_INPUT_##nr \ : "cr0", "ctr", "memory"); \ + err = r0; \ (int) r3; \ }) # undef INTERNAL_SYSCALL_ERROR_P # define INTERNAL_SYSCALL_ERROR_P(val, err) \ - ((unsigned long) (val) >= 0xfffff001u) + (__builtin_expect (err & (1 << 28), 0)) # undef INTERNAL_SYSCALL_ERRNO -# define INTERNAL_SYSCALL_ERRNO(val, err) (-(val)) +# define INTERNAL_SYSCALL_ERRNO(val, err) (val) # define LOADARGS_0(name, dummy) \ r0 = __NR_##name @@ -181,4 +156,4 @@ #endif /* __ASSEMBLER__ */ -#endif /* linux/powerpc/sysdep.h */ +#endif /* linux/powerpc/powerpc32/sysdep.h */ diff --git a/sysdeps/unix/sysv/linux/powerpc/powerpc32/vfork.S b/sysdeps/unix/sysv/linux/powerpc/powerpc32/vfork.S new file mode 100644 index 0000000000..9a0f53e99e --- /dev/null +++ b/sysdeps/unix/sysv/linux/powerpc/powerpc32/vfork.S @@ -0,0 +1,56 @@ +/* Copyright (C) 2003 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + 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.h> +#define _ERRNO_H 1 +#include <bits/errno.h> +#include <kernel-features.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. */ + +ENTRY (__vfork) + +#ifdef __NR_vfork + + DO_CALL (SYS_ify (vfork)) + +# ifdef __ASSUME_VFORK_SYSCALL + PSEUDO_RET +# else + bnslr+ + /* Check if vfork syscall is known at all. */ + cmpwi r3,ENOSYS + bne JUMPTARGET(__syscall_error) + +# endif +#endif + +#ifndef __ASSUME_VFORK_SYSCALL + /* If we don't have vfork, fork is close enough. */ + + DO_CALL (SYS_ify (fork)) + PSEUDO_RET +#endif + +PSEUDO_END (__vfork) +libc_hidden_def (__vfork) + +weak_alias (__vfork, vfork) |