diff options
Diffstat (limited to 'sysdeps/mips/elf/start.S')
| -rw-r--r-- | sysdeps/mips/elf/start.S | 59 |
1 files changed, 30 insertions, 29 deletions
diff --git a/sysdeps/mips/elf/start.S b/sysdeps/mips/elf/start.S index e85e9f535e..7567423f00 100644 --- a/sysdeps/mips/elf/start.S +++ b/sysdeps/mips/elf/start.S @@ -1,5 +1,6 @@ /* Startup code compliant to the ELF Mips ABI. - Copyright (C) 1995, 1997, 2000, 2001, 2002 Free Software Foundation, Inc. + Copyright (C) 1995, 1997, 2000, 2001, 2002, 2003 + 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 @@ -19,6 +20,7 @@ #define __ASSEMBLY__ 1 #include <entry.h> +#include <sys/asm.h> #ifndef ENTRY_POINT #error ENTRY_POINT needs to be defined for start.S on MIPS/ELF. @@ -52,42 +54,41 @@ char **argv, void (*init) (void), void (*fini) (void), void (*rtld_fini) (void), void *stack_end) */ -#ifdef __PIC__ -/* A macro to (re)initialize gp. We can get the run time address of 0f in - ra ($31) by blezal instruction. In this early phase, we can't save gp - in stack and .cprestore doesn't work properly. So we set gp by using - this macro. */ -#define SET_GP \ - .set noreorder; \ - bltzal $0,0f; \ - nop; \ -0: .cpload $31; \ - .set reorder; -#endif - + .text .globl ENTRY_POINT .type ENTRY_POINT,@function ENTRY_POINT: #ifdef __PIC__ - SET_GP + SETUP_GPX($0) + SETUP_GPX64($25,$0) #else - la $28, _gp /* Setup GP correctly if we're non-PIC. */ -#endif + PTR_LA $28, _gp /* Setup GP correctly if we're non-PIC. */ move $31, $0 +#endif - la $4, main /* main */ - lw $5, 0($29) /* argc */ - addu $6, $29, 4 /* argv */ - /* Allocate space on the stack for seven arguments and make sure - the stack is aligned to double words (8 bytes). */ - and $29, 0xfffffff8 - subu $29, 32 - la $7, __libc_csu_init /* init */ - la $8, __libc_csu_fini - sw $8, 16($29) /* fini */ - sw $2, 20($29) /* rtld_fini */ - sw $29, 24($29) /* stack_end */ + PTR_LA $4, main /* main */ + PTR_L $5, 0($29) /* argc */ + PTR_ADDIU $6, $29, PTRSIZE /* argv */ + + /* Allocate space on the stack for seven arguments (o32 only) + and make sure the stack is aligned to double words (8 bytes) + on o32 and quad words (16 bytes) on n32 and n64. */ + + and $29, -2 * SZREG +#if _MIPS_SIM == _MIPS_SIM_ABI32 + PTR_SUBIU $29, 32 +#endif + PTR_LA $7, __libc_csu_init /* init */ + PTR_LA $8, __libc_csu_fini +#if _MIPS_SIM == _MIPS_SIM_ABI32 + PTR_S $8, 16($29) /* fini */ + PTR_S $2, 20($29) /* rtld_fini */ + PTR_S $29, 24($29) /* stack_end */ +#else + move $9, $2 /* rtld_fini */ + move $10, $29 /* stack_end */ +#endif jal __libc_start_main hlt: b hlt /* Crash if somehow it does return. */ |