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Diffstat (limited to 'sysdeps/nios2/start.S')
| -rw-r--r-- | sysdeps/nios2/start.S | 139 |
1 files changed, 0 insertions, 139 deletions
diff --git a/sysdeps/nios2/start.S b/sysdeps/nios2/start.S deleted file mode 100644 index 528046d..0000000 --- a/sysdeps/nios2/start.S +++ /dev/null @@ -1,139 +0,0 @@ -/* Startup code for Nios II - Copyright (C) 1995-2024 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 - <https://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 - - The stack pointer, sp, will point to the argument count on the stack. - The initial state of the stack when a userspace process is started is: - - Purpose Start Address Length - Unspecified High Addresses - Referenced strings, etc. Varies - Unspecified - Null auxiliary vector entry 4bytes - Auxiliary vector entries 8bytes each - NULL terminator for envp 4bytes - Environment pointers sp+8+4*argc 4bytes each - NULL terminator for argv sp+4+4*argc 4bytes - Argument pointers sp+4 4bytes each - Argument count sp 4bytes - Unspecified Low Addresses - - If the application should register a destructor function with atexit, - the pointer will be placed in r4. Otherwise r4 will be zero. - - The contents of all other registers are unspecified. User code should - set fp to zero to mark the end of the frame chain. - - The auxiliary vector is a series of pairs of 32-bit tag and 32-bit - value, terminated by an AT_NULL tag. -*/ - - .text - .globl _start - .type _start,%function -_start: - /* Set up the global pointer. */ - movhi gp, %hiadj(_gp) - addi gp, gp, %lo(_gp) - - /* Save the stack pointer. */ - mov r2, sp - - /* Create room on the stack for the fini, rtld_fini and stack_end args - to __libc_start_main. */ - subi sp, sp, 12 - - /* Push stack_end */ - stw r2, 8(sp) - - /* Push rtld_fini */ - stw r4, 4(sp) - - /* Set up the GOT pointer. */ - nextpc r22 -1: movhi r2, %hiadj(_gp_got - 1b) - addi r2, r2, %lo(_gp_got - 1b) - add r22, r22, r2 - - /* Used to be fini. */ - stw zero, 0(sp) - - /* Used to be init. */ - mov r7, zero - - /* r6 == argv */ - addi r6, sp, 16 - - /* r5 == argc */ - ldw r5, 12(sp) - - /* r4 == main */ - movhi r4, %call_hiadj(main) - addi r4, r4, %call_lo(main) - add r4, r4, r22 - ldw r4, 0(r4) - - /* fp == 0 */ - mov fp, zero - - /* __libc_start_main (main, argc, argv, init, fini, rtld_fini, - stack_end) */ - - /* Let the libc call main and exit with its return code. */ - movhi r2, %call_hiadj(__libc_start_main) - addi r2, r2, %call_lo(__libc_start_main) - add r2, r2, r22 - ldw r2, 0(r2) - callr r2 - - /* should never get here....*/ - movhi r2, %call_hiadj(abort) - addi r2, r2, %call_lo(abort) - add r2, r2, r22 - ldw r2, 0(r2) - callr r2 - -/* 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 |