diff options
Diffstat (limited to 'sysdeps')
| -rw-r--r-- | sysdeps/unix/sysv/linux/mips/brk.c | 56 | ||||
| -rw-r--r-- | sysdeps/unix/sysv/linux/mips/init-first.h | 51 |
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); |