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authorAndreas Jaeger <aj@suse.de>2000-02-01 11:55:32 +0000
committerAndreas Jaeger <aj@suse.de>2000-02-01 11:55:32 +0000
commita745f3f26dbd4bf0981c4e53ad4d8f48d7cfb412 (patch)
tree38498d829a3afbc76e44984b6a668aa04452588b /sysdeps/unix/sysv/linux/mips
parentaaac6772cd3bb1ef9bf0eb24d0eeeabdb330c226 (diff)
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Update.
* 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.
Diffstat (limited to 'sysdeps/unix/sysv/linux/mips')
-rw-r--r--sysdeps/unix/sysv/linux/mips/brk.c56
-rw-r--r--sysdeps/unix/sysv/linux/mips/init-first.h51
2 files changed, 107 insertions, 0 deletions
diff --git a/sysdeps/unix/sysv/linux/mips/brk.c b/sysdeps/unix/sysv/linux/mips/brk.c
new file mode 100644
index 0000000000..ce8561797d
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/mips/brk.c
@@ -0,0 +1,56 @@
+/* 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)
diff --git a/sysdeps/unix/sysv/linux/mips/init-first.h b/sysdeps/unix/sysv/linux/mips/init-first.h
new file mode 100644
index 0000000000..d8c2f38c78
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/mips/init-first.h
@@ -0,0 +1,51 @@
+/* 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);