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- /* Startup code for the OpenRISC 1000 platform,
- based on microblaze implementation */
- /*
- 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.
- 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; see the file COPYING.LIB. If
- not, see <http://www.gnu.org/licenses/>. */
- __asm__ ("\
- .text\n\
- .globl _start\n\
- .type _start,@function\n\
- .hidden _start\n\
- _start:\n\
- l.ori r3, r9, 0\n\
- l.ori r3, r1, 0\n\
- l.movhi r11, 0\n\
- 1:\n\
- l.addi r3, r3, 4\n\
- l.lwz r12, 0(r3)\n\
- l.sfnei r12, 0\n\
- l.addi r11, r11, 1\n\
- l.bf 1b\n\
- l.nop\n\
- l.ori r3, r11, 0\n\
- l.ori r3, r1, 0\n\
- l.addi r11, r11, -1\n\
- /* store argument counter to stack */\n\
- l.sw 0(r3), r11\n\
- l.addi r1, r1, -24\n\
- l.sw 0(r1), r9\n\
- \n\
- l.jal .LPC0\n\
- #ifndef __OR1K_NODELAY__\n\
- l.nop\n\
- #endif\n\
- /* Load the PIC register */\n\
- .LPC0:\n\
- l.movhi r16, gotpchi(_GLOBAL_OFFSET_TABLE_+(.-.LPC0))\n\
- l.ori r16, r16, gotpclo(_GLOBAL_OFFSET_TABLE_+(.-.LPC0))\n\
- l.add r16, r16, r9\n\
- \n\
- l.jal _dl_start\n\
- l.nop\n\
- /* FALLTHRU */\n\
- \n\
- .globl _dl_start_user\n\
- .type _dl_start_user,@function\n\
- _dl_start_user:\n\
- l.movhi r12, gotoffhi(_dl_skip_args)\n\
- l.ori r12, r12, gotofflo(_dl_skip_args)\n\
- l.add r12, r12, r16\n\
- l.lwz r12, 0(r12)\n\
- l.lwz r3, 24(r1)\n\
- \n\
- l.movhi r9, gotoffhi(_dl_fini)\n\
- l.ori r9, r9, gotofflo(_dl_fini)\n\
- l.add r9, r9, r16\n\
- \n\
- l.addi r9, r9, -8\n\
- l.addi r1, r1, 24\n\
- l.jr r11\n\
- l.nop\n\
- .size _dl_start_user, . - _dl_start_user\n\
- .previous\n\
- ");
- /*
- * Get a pointer to the argv array. On many platforms this can be just
- * the address of the first argument, on other platforms we need to
- * do something a little more subtle here.
- */
- #define GET_ARGV(ARGVP, ARGS) ARGVP = (((unsigned long*) ARGS)+1)
- /* The ld.so library requires relocations */
- #define ARCH_NEEDS_BOOTSTRAP_RELOCS
- static __always_inline
- void PERFORM_BOOTSTRAP_RELOC(ELF_RELOC *rpnt, unsigned long *reloc_addr,
- unsigned long symbol_addr, unsigned long load_addr,
- attribute_unused Elf32_Sym *symtab)
- {
- switch (ELF_R_TYPE(rpnt->r_info))
- {
- case R_OR1K_RELATIVE:
- *reloc_addr = load_addr + rpnt->r_addend;
- break;
- default:
- _dl_exit(1);
- break;
- }
- }
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