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Diffstat (limited to 'sysdeps/arm/start.S')
| -rw-r--r-- | sysdeps/arm/start.S | 148 |
1 files changed, 0 insertions, 148 deletions
diff --git a/sysdeps/arm/start.S b/sysdeps/arm/start.S deleted file mode 100644 index 4973878f05..0000000000 --- a/sysdeps/arm/start.S +++ /dev/null @@ -1,148 +0,0 @@ -/* Startup code for ARM & ELF - 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/>. */ - -/* This is the canonical entry point, usually the first thing in the text - segment. - - Note that the code in the .init section has already been run. - This includes _init and _libc_init - - - At this entry point, most registers' values are unspecified, except: - - a1 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 The stack contains the arguments and environment: - 0(sp) argc - 4(sp) argv[0] - ... - (4*argc)(sp) NULL - (4*(argc+1))(sp) envp[0] - ... - NULL -*/ - -/* Tag_ABI_align8_preserved: This code preserves 8-byte - alignment in any callee. */ - .eabi_attribute 25, 1 -/* Tag_ABI_align8_needed: This code may require 8-byte alignment from - the caller. */ - .eabi_attribute 24, 1 - -#if defined(__thumb2__) - .thumb - .syntax unified -#endif - - .text - .globl _start - .type _start,#function -_start: - /* Protect against unhandled exceptions. */ - .fnstart - /* Clear the frame pointer and link register since this is the outermost frame. */ - mov fp, #0 - mov lr, #0 - - /* Pop argc off the stack and save a pointer to argv */ - pop { a2 } - mov a3, sp - - /* Push stack limit */ - push { a3 } - - /* Push rtld_fini */ - push { a1 } - -#ifdef SHARED - ldr sl, .L_GOT - adr a4, .L_GOT - add sl, sl, a4 - - ldr ip, .L_GOT+4 /* __libc_csu_fini */ - ldr ip, [sl, ip] - - push { ip } /* Push __libc_csu_fini */ - - ldr a4, .L_GOT+8 /* __libc_csu_init */ - ldr a4, [sl, a4] - - ldr a1, .L_GOT+12 /* main */ - ldr a1, [sl, a1] - - /* __libc_start_main (main, argc, argv, init, fini, rtld_fini, stack_end) */ - /* Let the libc call main and exit with its return code. */ - bl __libc_start_main(PLT) -#else - /* Fetch address of __libc_csu_fini */ - ldr ip, =__libc_csu_fini - - /* Push __libc_csu_fini */ - push { ip } - - /* Set up the other arguments in registers */ - ldr a1, =main - ldr a4, =__libc_csu_init - - /* __libc_start_main (main, argc, argv, init, fini, rtld_fini, stack_end) */ - /* Let the libc call main and exit with its return code. */ - bl __libc_start_main -#endif - - /* should never get here....*/ - bl abort - -#ifdef SHARED - .align 2 -.L_GOT: - .word _GLOBAL_OFFSET_TABLE_ - .L_GOT - .word __libc_csu_fini(GOT) - .word __libc_csu_init(GOT) - .word main(GOT) -#endif - - .cantunwind - .fnend - -/* 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 |