diff options
Diffstat (limited to 'ANDROID_3.4.5/arch/powerpc/boot/crt0.S')
| -rw-r--r-- | ANDROID_3.4.5/arch/powerpc/boot/crt0.S | 128 |
1 files changed, 0 insertions, 128 deletions
diff --git a/ANDROID_3.4.5/arch/powerpc/boot/crt0.S b/ANDROID_3.4.5/arch/powerpc/boot/crt0.S deleted file mode 100644 index 0f7428a3..00000000 --- a/ANDROID_3.4.5/arch/powerpc/boot/crt0.S +++ /dev/null @@ -1,128 +0,0 @@ -/* - * Copyright (C) Paul Mackerras 1997. - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License - * as published by the Free Software Foundation; either version - * 2 of the License, or (at your option) any later version. - * - * NOTE: this code runs in 32 bit mode, is position-independent, - * and is packaged as ELF32. - */ - -#include "ppc_asm.h" - - .text - /* A procedure descriptor used when booting this as a COFF file. - * When making COFF, this comes first in the link and we're - * linked at 0x500000. - */ - .globl _zimage_start_opd -_zimage_start_opd: - .long 0x500000, 0, 0, 0 - -p_start: .long _start -p_etext: .long _etext -p_bss_start: .long __bss_start -p_end: .long _end - - .weak _platform_stack_top -p_pstack: .long _platform_stack_top - - .weak _zimage_start - .globl _zimage_start -_zimage_start: - .globl _zimage_start_lib -_zimage_start_lib: - /* Work out the offset between the address we were linked at - and the address where we're running. */ - bl .+4 -p_base: mflr r10 /* r10 now points to runtime addr of p_base */ - /* grab the link address of the dynamic section in r11 */ - addis r11,r10,(_GLOBAL_OFFSET_TABLE_-p_base)@ha - lwz r11,(_GLOBAL_OFFSET_TABLE_-p_base)@l(r11) - cmpwi r11,0 - beq 3f /* if not linked -pie */ - /* get the runtime address of the dynamic section in r12 */ - .weak __dynamic_start - addis r12,r10,(__dynamic_start-p_base)@ha - addi r12,r12,(__dynamic_start-p_base)@l - subf r11,r11,r12 /* runtime - linktime offset */ - - /* The dynamic section contains a series of tagged entries. - * We need the RELA and RELACOUNT entries. */ -RELA = 7 -RELACOUNT = 0x6ffffff9 - li r9,0 - li r0,0 -9: lwz r8,0(r12) /* get tag */ - cmpwi r8,0 - beq 10f /* end of list */ - cmpwi r8,RELA - bne 11f - lwz r9,4(r12) /* get RELA pointer in r9 */ - b 12f -11: addis r8,r8,(-RELACOUNT)@ha - cmpwi r8,RELACOUNT@l - bne 12f - lwz r0,4(r12) /* get RELACOUNT value in r0 */ -12: addi r12,r12,8 - b 9b - - /* The relocation section contains a list of relocations. - * We now do the R_PPC_RELATIVE ones, which point to words - * which need to be initialized with addend + offset. - * The R_PPC_RELATIVE ones come first and there are RELACOUNT - * of them. */ -10: /* skip relocation if we don't have both */ - cmpwi r0,0 - beq 3f - cmpwi r9,0 - beq 3f - - add r9,r9,r11 /* Relocate RELA pointer */ - mtctr r0 -2: lbz r0,4+3(r9) /* ELF32_R_INFO(reloc->r_info) */ - cmpwi r0,22 /* R_PPC_RELATIVE */ - bne 3f - lwz r12,0(r9) /* reloc->r_offset */ - lwz r0,8(r9) /* reloc->r_addend */ - add r0,r0,r11 - stwx r0,r11,r12 - addi r9,r9,12 - bdnz 2b - - /* Do a cache flush for our text, in case the loader didn't */ -3: lwz r9,p_start-p_base(r10) /* note: these are relocated now */ - lwz r8,p_etext-p_base(r10) -4: dcbf r0,r9 - icbi r0,r9 - addi r9,r9,0x20 - cmplw cr0,r9,r8 - blt 4b - sync - isync - - /* Clear the BSS */ - lwz r9,p_bss_start-p_base(r10) - lwz r8,p_end-p_base(r10) - li r0,0 -5: stw r0,0(r9) - addi r9,r9,4 - cmplw cr0,r9,r8 - blt 5b - - /* Possibly set up a custom stack */ - lwz r8,p_pstack-p_base(r10) - cmpwi r8,0 - beq 6f - lwz r1,0(r8) - li r0,0 - stwu r0,-16(r1) /* establish a stack frame */ -6: - - /* Call platform_init() */ - bl platform_init - - /* Call start */ - b start |