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Diffstat (limited to 'sysdeps/mips/start.S')
| -rw-r--r-- | sysdeps/mips/start.S | 185 |
1 files changed, 0 insertions, 185 deletions
diff --git a/sysdeps/mips/start.S b/sysdeps/mips/start.S deleted file mode 100644 index 777b42d4ce..0000000000 --- a/sysdeps/mips/start.S +++ /dev/null @@ -1,185 +0,0 @@ -/* Startup code compliant to the ELF Mips ABI. - Copyright (C) 1995-2017 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 Lesser General Public - License as published by the Free Software Foundation; either - version 2.1 of the License, or (at your option) any later version. - - In addition to the permissions in the GNU Lesser General Public - License, the Free Software Foundation gives you unlimited - permission to link the compiled version of this file with other - programs, and to distribute those programs without any restriction - coming from the use of this file. (The GNU Lesser General Public - License restrictions do apply in other respects; for example, they - cover modification of the file, and distribution when not linked - into another program.) - - Note that people who make modified versions of this file are not - obligated to grant this special exception for their modified - versions; it is their choice whether to do so. The GNU Lesser - General Public License gives permission to release a modified - version without this exception; this exception also makes it - possible to release a modified version which carries forward this - exception. - - 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 - Lesser General Public License for more details. - - You should have received a copy of the GNU Lesser General Public - License along with the GNU C Library. If not, see - <http://www.gnu.org/licenses/>. */ - -#define __ASSEMBLY__ 1 -#include <entry.h> -#include <sgidefs.h> -#include <sys/asm.h> - -#ifndef ENTRY_POINT -#error ENTRY_POINT needs to be defined for start.S on MIPS/ELF. -#endif - -/* This is the canonical entry point, usually the first thing in the text - segment. The SVR4/Mips ABI (pages 3-31, 3-32) says that when the entry - point runs, most registers' values are unspecified, except for: - - v0 ($2) Contains a function pointer to be registered with `atexit'. - This is how the dynamic linker arranges to have DT_FINI - functions called for shared libraries that have been loaded - before this code runs. - - sp ($29) The stack contains the arguments and environment: - 0(%esp) argc - 4(%esp) argv[0] - ... - (4*argc)(%esp) NULL - (4*(argc+1))(%esp) envp[0] - ... - NULL - ra ($31) The return address register is set to zero so that programs - that search backword through stack frames recognize the last - stack frame. -*/ - - -/* We need to call: - __libc_start_main (int (*main) (int, char **, char **), int argc, - char **argv, void (*init) (void), void (*fini) (void), - void (*rtld_fini) (void), void *stack_end) -*/ - - .text - .globl ENTRY_POINT - .type ENTRY_POINT,@function -#ifndef __mips16 -ENTRY_POINT: -# ifdef __PIC__ - SETUP_GPX($0) - SETUP_GPX64($25,$0) -# else - PTR_LA $28, _gp /* Setup GP correctly if we're non-PIC. */ - move $31, $0 -# endif - - 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 == _ABIO32 - PTR_SUBIU $29, 32 -# endif - PTR_LA $7, __libc_csu_init /* init */ - PTR_LA $8, __libc_csu_fini -# if _MIPS_SIM == _ABIO32 - 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 - PTR_LA $25, __libc_start_main - jalr $25 -hlt: b hlt /* Crash if somehow it does return. */ - -#elif _MIPS_SIM == _ABIO32 /* __mips16 */ - /* MIPS16 entry point. */ - .set mips16 -ENTRY_POINT: -# ifdef __PIC__ - li $3, %hi(_gp_disp) - addiu $4, $pc, %lo(_gp_disp) - sll $3, 16 - addu $3, $4 - move $gp, $3 -# else - li $3, %hi(_gp) - sll $3, 16 - addiu $3, %lo(_gp) - move $gp, $3 -# endif - /* Tie end of stack frames. */ - li $4, 0 - move $31, $4 - /* Create new SP value in $7, including alignment. */ - li $4, 2 * SZREG - neg $4, $4 - move $7, $sp - and $7, $4 - addiu $7, -32 - /* Load arguments with original SP. */ - lw $5, 0($sp) - addiu $6, $sp, PTRSIZE - /* Update SP. */ - move $sp, $7 - /* Lay out last arguments, and call __libc_start_main(). */ -# ifdef __PIC__ - sw $7, 24($sp) /* stack_end */ - lw $4, %got(__libc_csu_fini)($3) - lw $7, %got(__libc_csu_init)($3) /* init */ - sw $4, 16($sp) /* fini */ - lw $4, %got(main)($3) /* main */ - lw $3, %call16(__libc_start_main)($3) - sw $2, 20($sp) /* rtld_fini */ - move $25, $3 - jalr $3 -# else - lw $4, 1f - sw $7, 24($sp) /* stack_end */ - lw $7, 2f /* init */ - sw $4, 16($sp) /* fini */ - lw $4, 3f /* main */ - sw $2, 20($sp) /* rtld_fini */ - /* Load and call __libc_start_main(). */ - lw $3, 4f - jalr $3 -# endif -hlt: b hlt /* Crash if somehow it does return. */ -# ifndef __PIC__ - .align 2 -1: .word __libc_csu_fini -2: .word __libc_csu_init -3: .word main -4: .word __libc_start_main -# endif - -#else /* __mips16 && _MIPS_SIM != _ABIO32 */ -# error "MIPS16 support for N32/N64 not implemented" - -#endif /* __mips16 */ - -/* 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 |