diff options
Diffstat (limited to 'libc/sysdeps/linux')
| -rw-r--r-- | libc/sysdeps/linux/powerpc/crt1.S | 89 |
1 files changed, 89 insertions, 0 deletions
diff --git a/libc/sysdeps/linux/powerpc/crt1.S b/libc/sysdeps/linux/powerpc/crt1.S new file mode 100644 index 000000000..c042462e9 --- /dev/null +++ b/libc/sysdeps/linux/powerpc/crt1.S @@ -0,0 +1,89 @@ +/* + * Copyright (C) 2003 by Erik Andersen + * + * This program 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. + * + * This program 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 this program; if not, write to the Free Software Foundation, + * Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + */ + +#include <features.h> +/* Integer registers. */ +#define r0 0 +#define r1 1 +#define r2 2 +#define r3 3 +#define r4 4 +#define r5 5 +#define r6 6 +#define r7 7 +#define r8 8 +#define r9 9 +#define r10 10 +#define r13 13 +#define r31 31 + +.text + .globl _start + .type _start,%function + .type _init,%function + .type _fini,%function +#ifndef __UCLIBC_CTOR_DTOR__ + .weak _init + .weak _fini +#endif + .type main,%function + .type __uClibc_main,%function + +_start: + mr r9,r1 /* Save the stack pointer and pass it to __uClibc_main */ + clrrwi r1,r1,4 /* Align stack ptr to 16 bytes */ +#ifdef __PIC__ + bl _GLOBAL_OFFSET_TABLE_-4@local + mflr r31 +#endif + /* Set up an initial stack frame, and clear the LR. */ + li r0,0 + stwu r1,-16(r1) + mtlr r0 + stw r0,0(r1) + /* find argc from the stack pointer */ + lwz r4,0(r9) + /* find argv one word offset from the stack pointer */ + addi r5,r9,4 + mr r8,r7 /* Pass _dl_fini from ldso or NULL if statically linked */ + /* Ok, now run uClibc's main() -- shouldn't return */ +#ifdef __PIC__ + lwz r6,_init@got(r31) + lwz r7,_fini@got(r31) + lwz r3,main@got(r31) + b __uClibc_main@plt +#else + lis r6,_init@ha # load top 16 bits + addi r6,r6,_init@l # load bottom 16 bits + lis r7,_fini@ha # load top 16 bits + addi r7,r7,_fini@l # load bottom 16 bits + lis r3,main@ha # load top 16 bits + addi r3,r3,main@l # load bottom 16 bits + b __uClibc_main +#endif + +.size _start,.-_start + +/* Define a symbol for the first piece of initialized data. */ + .data + .globl __data_start +__data_start: + .long 0 + .weak data_start + data_start = __data_start + |