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43 lines
1.7 KiB
ArmAsm
43 lines
1.7 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 <tls.h>
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/* Save the PID value. */
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#define SAVE_PID \
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READ_THREAD_POINTER(v1); /* Get the thread pointer. */ \
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lw a2, PID_OFFSET(v1); /* Load the saved PID. */ \
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subu a2, $0, a2; /* Negate it. */ \
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bnez a2, 1f; /* If it was zero... */ \
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lui a2, 0x8000; /* use 0x80000000 instead. */ \
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1: sw a2, PID_OFFSET(v1); /* Store the temporary PID. */
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/* Restore the old PID value in the parent. */
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#define RESTORE_PID \
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beqz v0, 1f; /* If we are the parent... */ \
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READ_THREAD_POINTER(v1); /* Get the thread pointer. */ \
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lw a2, PID_OFFSET(v1); /* Load the saved PID. */ \
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subu a2, $0, a2; /* Re-negate it. */ \
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lui a0, 0x8000; /* Load 0x80000000... */ \
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bne a2, a0, 2f; /* ... compare against it... */ \
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li a2, 0; /* ... use 0 instead. */ \
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2: sw a2, PID_OFFSET(v1); /* Restore the PID. */ \
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1:
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#include <../sysdeps/unix/sysv/linux/mips/vfork.S>
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