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0daa050021
* sysdeps/hppa/dl-machine.h (elf_machine_fixup_plt): Remove lvalue cast. * sysdeps/hppa/dl-trampoline.S (_dl_fixup): Correct stack usage. (_dl_runtime_profile): LA fixups. * sysdeps/unix/sysv/linux/hppa/clone.S: Correct stack usage. Return -1 on error. Use branch and link for error handler funciton. * sysdeps/unix/sysv/linux/hppa/sysdep.h: Correct stack usage. Avoid register shuffling. * sysdeps/unix/sysv/linux/hppa/bits/atomic.h (ASM_EAGAIN): Define as -EAGAIN. * sysdeps/unix/sysv/linux/hppa/bits/mman.h: Adjust definitions to match required standards. * sysdeps/unix/sysv/linux/hppa/nptl/lowlevellock.h (lll_futex_wait): Return __ret. (lll_futex_timed_wait): Likewise. (lll_futex_wake): Likewise. (lll_futex_requeue): Likewise. * sysdeps/unix/sysv/linux/hppa/nptl/pt-vfork.S: Correct stack usage and adjust error return. * sysdeps/unix/sysv/linux/hppa/nptl/sysdep-cancel.h: Adjust stack usage for gdb, and avoid extra register loads. * sysdeps/unix/sysv/linux/hppa/nptl/unwind-forcedunwind.c: Copy nptl/sysdeps/pthread/unwind-forcedunwind.c. (LIBGCC_SO): Define and use. * sysdeps/unix/sysv/linux/hppa/nptl/unwind-resume.c: Copy nptl/sysdeps/pthread/unwind-resume.c. (LIBGCC_SO): Define and use.
101 lines
2.9 KiB
ArmAsm
101 lines
2.9 KiB
ArmAsm
/* Copyright (C) 2005 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, write to the Free
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Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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02111-1307 USA. */
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#include <sysdep.h>
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#define _ERRNO_H 1
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#include <bits/errno.h>
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#include <tcb-offsets.h>
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/* Clone the calling process, but without copying the whole address space.
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The calling process is suspended until the new process exits or is
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replaced by a call to `execve'. Return -1 for errors, 0 to the new process,
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and the process ID of the new process to the old process. */
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/* Load the thread register.
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Load the saved PID value.
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Negate the value.
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Store the temporary PID. */
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#define SAVE_PID \
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mfctl %cr27, %r26 ASM_LINE_SEP \
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ldw PID_THREAD_OFFSET(%r26),%r1 ASM_LINE_SEP \
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sub %r0,%r1,%r1 ASM_LINE_SEP \
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stw %r1,PID_THREAD_OFFSET(%r26) ASM_LINE_SEP
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/* If we are the parent...
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Get the thread pointer.
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Load the saved PID.
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Negate the value (got back original)
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Restore the PID. */
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#define RESTORE_PID \
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cmpb,=,n %r0,%ret0,.Lthread_start ASM_LINE_SEP \
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mfctl %cr27, %r26 ASM_LINE_SEP \
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ldw PID_THREAD_OFFSET(%r26),%r1 ASM_LINE_SEP \
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sub %r0,%r1,%r1 ASM_LINE_SEP \
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stw %r1,PID_THREAD_OFFSET(%r26) ASM_LINE_SEP \
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.Lthread_start: ASM_LINE_SEP
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/* r26, r25, r24, r23 are free since vfork has no arguments */
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ENTRY(__vfork)
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/* Prologue */
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stwm %r3, 64(%sp)
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stw %sp, -4(%sp)
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stw %r19, -32(%sp)
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/* Save the PIC register. */
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#ifdef PIC
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copy %r19, %r25 /* parent */
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#endif
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/* Save the process PID */
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SAVE_PID
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/* Syscall saves and restores all register states */
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ble 0x100(%sr2,%r0)
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ldi __NR_vfork,%r20
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/* Conditionally restore the PID */
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RESTORE_PID
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/* Check for error */
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ldi -4096,%r1
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comclr,>>= %r1,%ret0,%r0 /* Note: unsigned compare. */
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b,n .Lerror
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/* Return, no need to restore the PIC register. */
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ldw -84(%sp), %rp
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bv %r0(%rp)
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ldwm -64(%sp), %r3
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.Lerror:
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sub %r0,%ret0,%r3
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SYSCALL_ERROR_HANDLER
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/* Restore the PIC register (in delay slot) on error */
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#ifdef PIC
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copy %r25, %r19 /* parent */
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#else
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nop
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#endif
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/* Write syscall return into errno location */
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stw %r3, 0(%ret0)
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ldw -84(%sp), %rp
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bv %r0(%rp)
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ldwm -64(%sp), %r3
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PSEUDO_END (__vfork)
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libc_hidden_def (__vfork)
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weak_alias (__vfork, vfork)
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