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author | Ulrich Drepper <drepper@redhat.com> | 2004-03-11 16:06:03 +0000 |
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committer | Ulrich Drepper <drepper@redhat.com> | 2004-03-11 16:06:03 +0000 |
commit | 8a3e10e087e22316f0a94fbc38c19f17c6915d42 (patch) | |
tree | 08edaadad331a68cbb5ef9b4157e841ed2cf99cf /nptl/sysdeps | |
parent | 754af0b1cac36de63d9525c91b1d9bf687ea05f7 (diff) | |
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Update.
2004-03-11 Kaz Kojima <kkojima@rr.iij4u.or.jp>
* sysdeps/sh/tcb-offsets.sym: Add PID.
* sysdeps/unix/sysv/linux/sh/pt-vfork.S: Properly handle PID cache.
* sysdeps/unix/sysv/linux/sh/vfork.S: New file.
Diffstat (limited to 'nptl/sysdeps')
-rw-r--r-- | nptl/sysdeps/sh/tcb-offsets.sym | 1 | ||||
-rw-r--r-- | nptl/sysdeps/unix/sysv/linux/sh/pt-vfork.S | 67 | ||||
-rw-r--r-- | nptl/sysdeps/unix/sysv/linux/sh/vfork.S | 71 |
3 files changed, 138 insertions, 1 deletions
diff --git a/nptl/sysdeps/sh/tcb-offsets.sym b/nptl/sysdeps/sh/tcb-offsets.sym index e96daf980f..539789a817 100644 --- a/nptl/sysdeps/sh/tcb-offsets.sym +++ b/nptl/sysdeps/sh/tcb-offsets.sym @@ -3,6 +3,7 @@ RESULT offsetof (struct pthread, result) TID offsetof (struct pthread, tid) +PID offsetof (struct pthread, pid) CANCELHANDLING offsetof (struct pthread, cancelhandling) CLEANUP_JMP_BUF offsetof (struct pthread, cleanup_jmp_buf) MULTIPLE_THREADS_OFFSET offsetof (struct pthread, header.multiple_threads) diff --git a/nptl/sysdeps/unix/sysv/linux/sh/pt-vfork.S b/nptl/sysdeps/unix/sysv/linux/sh/pt-vfork.S index 5b13639c77..2d1148daa5 100644 --- a/nptl/sysdeps/unix/sysv/linux/sh/pt-vfork.S +++ b/nptl/sysdeps/unix/sysv/linux/sh/pt-vfork.S @@ -1 +1,66 @@ -#include <sysdeps/unix/sysv/linux/sh/vfork.S> +/* Copyright (C) 2003, 2004 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 <tcb-offsets.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) + /* Save the PID value. */ + stc gbr, r2 + mov.w .L2, r0 + mov.l @(r0,r2), r4 + neg r4, r1 + mov.l r1, @(r0,r2) + + mov.w .L1, r3 + trapa #0x10 + mov r0, r1 + + /* Restore the old PID value in the parent. */ + tst r0, r0 + bt/s 2f + stc gbr, r2 + mov.w .L2, r0 + mov.l r4, @(r0,r2) + mov r1, r0 +2: + mov #-12, r2 + shad r2, r1 + not r1, r1 // r1=0 means r0 = -1 to -4095 + tst r1, r1 // i.e. error in linux + bf .Lpseudo_end + SYSCALL_ERROR_HANDLER +.Lpseudo_end: + rts + nop +.L1: + .word __NR_vfork +.L2: + .word PID - TLS_PRE_TCB_SIZE + +PSEUDO_END (__vfork) +libc_hidden_def (__vfork) + +weak_alias (__vfork, vfork) diff --git a/nptl/sysdeps/unix/sysv/linux/sh/vfork.S b/nptl/sysdeps/unix/sysv/linux/sh/vfork.S new file mode 100644 index 0000000000..5433eacbe9 --- /dev/null +++ b/nptl/sysdeps/unix/sysv/linux/sh/vfork.S @@ -0,0 +1,71 @@ +/* Copyright (C) 2004 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 <tcb-offsets.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) + /* Save the PID value. */ + stc gbr, r2 + mov.w .L2, r0 + mov.l @(r0,r2), r4 + neg r4, r1 + tst r1, r1 + bf 1f + mov #1, r1 + rotr r1 +1: + mov.l r1, @(r0,r2) + + mov.w .L1, r3 + trapa #0x10 + mov r0, r1 + + /* Restore the old PID value in the parent. */ + tst r0, r0 + bt.s 2f + stc gbr, r2 + mov.w .L2, r0 + mov.l r4, @(r0,r2) + mov r1, r0 +2: + mov #-12, r2 + shad r2, r1 + not r1, r1 // r1=0 means r0 = -1 to -4095 + tst r1, r1 // i.e. error in linux + bf .Lpseudo_end + SYSCALL_ERROR_HANDLER +.Lpseudo_end: + rts + nop +.L1: + .word __NR_vfork +.L2: + .word PID - TLS_PRE_TCB_SIZE + .align 2 +PSEUDO_END (__vfork) +libc_hidden_def (__vfork) + +weak_alias (__vfork, vfork) |