mirror of git://sourceware.org/git/glibc.git
97 lines
2.7 KiB
C
97 lines
2.7 KiB
C
/* Prepare arguments for library initialization function.
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Copyright (C) 1997 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 Library General Public License as
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published by the Free Software Foundation; either version 2 of the
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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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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with the GNU C Library; see the file COPYING.LIB. If not,
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write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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/* The job of this fragment it to find argc and friends for INIT.
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This is done in one of two ways: either in the stack context
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of program start, or having dlopen pass them in. */
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#include <sysdep.h>
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#define __S1(x) #x
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#define __S(x) __S1(x)
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#ifdef PIC
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#define SYSDEP_CALL_INIT(NAME, INIT) asm("\
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.weak _dl_starting_up
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.global " #NAME "
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.type " #NAME ",@function
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" #NAME ":
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save %sp, -64, %sp
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1: call 11f
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sethi %hi(_GLOBAL_OFFSET_TABLE_-(1b-.)), %l7
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11: or %l7, %lo(_GLOBAL_OFFSET_TABLE_-(1b-.)), %l7
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add %l7, %o7, %l7
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/* Are we a dynamic libc being loaded into a static program? */
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sethi %hi(_dl_starting_up), %l2
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or %l2, %lo(_dl_starting_up), %l2
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ld [%l7+%l2], %l2
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cmp %l2, 0
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beq 3f
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sethi %hi(__libc_multiple_libcs), %l3
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ld [%l2], %l2
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subcc %g0, %l2, %g0
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subx %g0, -1, %l2
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3: or %l3, %lo(__libc_multiple_libcs), %l3
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ld [%l7+%l3], %l3
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cmp %l2, 0
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st %l2, [%l3]
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/* If so, argc et al are in %o0-%o2 already. Otherwise, load them. */
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bnz " #INIT "
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restore
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ld [%sp+22*4], %o0
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add %sp, 23*4, %o1
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sll %o0, 2, %o2
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add %o2, %o1, %o2
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ba " #INIT "
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add %o2, 4, %o2
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.size "#NAME ", .-" #NAME);
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#else
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#define SYSDEP_CALL_INIT(NAME, INIT) asm("\
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.weak _dl_starting_up
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.global " #NAME "
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.type " #NAME ",@function
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" #NAME ":
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/* Are we a dynamic libc being loaded into a static program? */
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sethi %hi(_dl_starting_up), %g2
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or %g2, %lo(_dl_starting_up), %g2
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cmp %g2, 0
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beq 3f
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sethi %hi(__libc_multiple_libcs), %g3
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ld [%g2], %g2
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subcc %g0, %g2, %g0
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subx %g0, -1, %g2
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3: or %g3, %lo(__libc_multiple_libcs), %g3
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cmp %g2, 0
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st %g2, [%g3]
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/* If so, argc et al are in %o0-%o2 already. Otherwise, load them. */
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bnz " #INIT "
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nop
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ld [%sp+22*4], %o0
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add %sp, 23*4, %o1
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sll %o0, 2, %o2
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add %o2, %o1, %o2
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ba " #INIT "
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add %o2, 4, %o2
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.size "#NAME ", .-" #NAME);
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#endif
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