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* sysdeps/unix/sysv/linux/mips/init-first.h: New file, from Ralf
	Baechle <ralf@gnu.org>.

	* sysdeps/unix/sysv/linux/mips/brk.c: New file.
This commit is contained in:
Andreas Jaeger 2000-02-01 11:55:32 +00:00
parent aaac6772cd
commit a745f3f26d
3 changed files with 112 additions and 0 deletions
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@ -1,5 +1,10 @@
2000-02-01 Andreas Jaeger <aj@suse.de>
* sysdeps/unix/sysv/linux/mips/init-first.h: New file, from Ralf
Baechle <ralf@gnu.org>.
* sysdeps/unix/sysv/linux/mips/brk.c: New file.
* sysdeps/unix/sysv/linux/mips/sys/ucontext.h: Add missing ints.
* sysdeps/mips/elf/start.S: Rewritten for __libc_start_main.

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sysdeps/unix/sysv/linux/mips/brk.c Normal file
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/* brk system call for Linux/MIPS.
Copyright (C) 2000 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 Library General Public License as
published by the Free Software Foundation; either version 2 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with the GNU C Library; see the file COPYING.LIB. If not,
write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
#include <errno.h>
#include <unistd.h>
#include <sysdep.h>
void *__curbrk = 0;
/* Old braindamage in GCC's crtstuff.c requires this symbol in an attempt
to work around different old braindamage in the old Linux/x86 ELF
dynamic linker. Sigh. */
weak_alias (__curbrk, ___brk_addr)
int
__brk (void *addr)
{
void *newbrk;
{
register long int res __asm__ ("$2");
asm ("move\t$4,%2\n\t"
"syscall" /* Perform the system call. */
: "=r" (res)
: "0" (SYS_ify (brk)), "r" (addr)
: "$4", "$7");
newbrk = (void *) res;
}
__curbrk = newbrk;
if (newbrk < addr)
{
__set_errno (ENOMEM);
return -1;
}
return 0;
}
weak_alias (__brk, brk)

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sysdeps/unix/sysv/linux/mips/init-first.h Normal file
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/* Prepare arguments for library initialization function.
Copyright (C) 2000 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 Library General Public License as
published by the Free Software Foundation; either version 2 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with the GNU C Library; see the file COPYING.LIB. If not,
write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
/* The job of this fragment it to find argc and friends for INIT.
This is done in one of two ways: either in the stack context
of program start, or having dlopen pass them in. */
#define SYSDEP_CALL_INIT(NAME, INIT) \
asm(".weak _dl_starting_up\n\t" \
".globl " #NAME "\n\t" \
".ent " #NAME "\n" \
#NAME ":\n\t" \
".set noreorder\n\t" \
".cpload $25\n\t" \
".set reorder\n\t" \
/* Are we a dynamic libc being loaded into a static program? */ \
"la $8, _dl_starting_up\n\t" \
"beqz $8, 1f\n\t" \
"lw $8, 0($8)\n\t" \
"seq $8, $8, 0\n" \
"1:\t" \
"sw $8, __libc_multiple_libcs\n\t" \
/* If so, argc et al are in a0-a2 already. Otherwise, load them. */ \
"bnez $8, 2f\n\t" \
"lw $4, 16($29)\n\t" \
"addiu $5, $29, 20\n\t" \
"sll $6, $4, 2\n\t" \
"addiu $6, $6, 4\n\t" \
"addu $6, $5, $6\n" \
"2:\t" \
"la $25, " #INIT "\n\t" \
"jr $25\n\t" \
".end " #NAME "\n\t" \
"3:\t" \
".size " #NAME ", 3b-" #NAME);