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Diffstat (limited to 'sysdeps/tile/start.S')
| -rw-r--r-- | sysdeps/tile/start.S | 203 |
1 files changed, 0 insertions, 203 deletions
diff --git a/sysdeps/tile/start.S b/sysdeps/tile/start.S deleted file mode 100644 index 911f66f319..0000000000 --- a/sysdeps/tile/start.S +++ /dev/null @@ -1,203 +0,0 @@ -/* Copyright (C) 2011-2016 Free Software Foundation, Inc. - This file is part of the GNU C Library. - Contributed by Chris Metcalf <cmetcalf@tilera.com>, 2011. - - 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. The ELF standard tells us that the stack is set up like this on - entry (the left side is the offset from "sp"), in units of - __SIZEOF_POINTER__ entries: - - +0 argc - +1 argv[0] - ... - +(argc+1) NULL - +(argc+2) envp[0] - ... - NULL - ... ElfInfo - - The ElfInfo is pairs of key/value long words following the envp - pointers and terminated by a zero-valued key. - - Although not mandated by the standard, it happens to be the case - that we store the actual argv and envp strings immediately after - the ElfInfo data on the stack. - - On entry r0 points to the shared library termination function, or 0 - if there isn't one. -*/ - -#include <features.h> -#include <sysdep.h> -#include <arch/abi.h> - -/* Just create no-ops if we don't support PC-relative PLT relocations. */ -#ifdef NO_PLT_PCREL -# define hw2_last_plt(x) 0 -# define hw1_plt(x) 0 -# define hw0_plt(x) 0 -#endif - - .text - .global _start - .type _start,@function - .align 8 -_start: - /* Linux starts us with sp pointing at the conventional Elf layout, - but we need to allow two "caller" words for our ABI convention. */ - { - /* Load argc (stored as a "long", equivalent to a pointer type). */ - LD_PTR r1, sp - - /* Save incoming 'sp', which points to the Elf argument block. */ - move r52, sp - } - - { - /* Allocate stack frame callee space for __libc_start_main. */ - ADDI_PTR r12, sp, -(2 * REGSIZE) - } - - { - /* Get our PC. */ - lnk r13 - - /* sp is not necessarily properly aligned on startup because - of the way ld.so pops off leading argv elements. So align it. */ - andi sp, r12, -8 - } -.Lmy_pc: - - { - /* Pass the address of the shared library termination function. */ - move r5, r0 - - /* Compute location where __libc_start_main's caller is supposed to - store its frame pointer. */ - ADDI_PTR r12, sp, REGSIZE - - /* Zero out callee space for return address. Unnecessary but free. - This is just paranoia to help backtracing not go awry. */ - ST sp, zero - } - { - /* Zero out our frame pointer for __libc_start_main. */ - ST r12, zero - - /* Zero out lr to make __libc_start_main the end of backtrace. */ - move lr, zero - - /* Compute a pointer to argv. envp will be determined - later in __libc_start_main. We set up the first argument - (the address of main) below. */ - ADDI_PTR r2, r52, __SIZEOF_POINTER__ - } - { - /* Pass the highest stack address to user code. */ - ADDI_PTR r6, sp, (2 * REGSIZE) - - /* Pass address of main() in r0, and of our own entry - points to .fini and .init in r3 and r4. */ -#ifdef __tilegx__ - moveli r0, hw2_last(main - .Lmy_pc) - } - { - shl16insli r0, r0, hw1(main - .Lmy_pc) - moveli r3, hw2_last(__libc_csu_init - .Lmy_pc) - } - { - shl16insli r0, r0, hw0(main - .Lmy_pc) - shl16insli r3, r3, hw1(__libc_csu_init - .Lmy_pc) - } - { - ADD_PTR r0, r0, r13 - shl16insli r3, r3, hw0(__libc_csu_init - .Lmy_pc) - } - { - moveli r12, hw2_last_plt(__libc_start_main - .Lmy_pc) - ADD_PTR r3, r3, r13 - } - { - shl16insli r12, r12, hw1_plt(__libc_start_main - .Lmy_pc) - moveli r4, hw2_last(__libc_csu_fini - .Lmy_pc) - } - { - shl16insli r12, r12, hw0_plt(__libc_start_main - .Lmy_pc) - shl16insli r4, r4, hw1(__libc_csu_fini - .Lmy_pc) - } - { - ADD_PTR r12, r12, r13 - shl16insli r4, r4, hw0(__libc_csu_fini - .Lmy_pc) - } - { - ADD_PTR r4, r4, r13 -# ifdef NO_PLT_PCREL - j plt(__libc_start_main) -# else - jr r12 -# endif - } -#else - addli r0, r13, lo16(main - .Lmy_pc) - } - { - auli r0, r0, ha16(main - .Lmy_pc) - addli r3, r13, lo16(__libc_csu_init - .Lmy_pc) - } - { - auli r3, r3, ha16(__libc_csu_init - .Lmy_pc) - addli r4, r13, lo16(__libc_csu_fini - .Lmy_pc) - } - { - auli r4, r4, ha16(__libc_csu_fini - .Lmy_pc) - /* Call the user's main function, and exit with its value. - But let the libc call main. */ - j plt(__libc_start_main) - } -#endif - - { - /* Tell backtracer to give up (_start has no caller). */ - info INFO_OP_CANNOT_BACKTRACE - } -.size _start, .-_start - -/* Define a symbol for the first piece of initialized data. */ - .data - .global __data_start - .align 8 -__data_start: - .long 0 - .weak data_start - data_start = __data_start |