diff options
Diffstat (limited to 'ANDROID_3.4.5/arch/arm/lib/backtrace.S')
-rw-r--r-- | ANDROID_3.4.5/arch/arm/lib/backtrace.S | 152 |
1 files changed, 0 insertions, 152 deletions
diff --git a/ANDROID_3.4.5/arch/arm/lib/backtrace.S b/ANDROID_3.4.5/arch/arm/lib/backtrace.S deleted file mode 100644 index cd07b581..00000000 --- a/ANDROID_3.4.5/arch/arm/lib/backtrace.S +++ /dev/null @@ -1,152 +0,0 @@ -/* - * linux/arch/arm/lib/backtrace.S - * - * Copyright (C) 1995, 1996 Russell King - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - * - * 27/03/03 Ian Molton Clean up CONFIG_CPU - * - */ -#include <linux/linkage.h> -#include <asm/assembler.h> - .text - -@ fp is 0 or stack frame - -#define frame r4 -#define sv_fp r5 -#define sv_pc r6 -#define mask r7 -#define offset r8 - -ENTRY(c_backtrace) - -#if !defined(CONFIG_FRAME_POINTER) || !defined(CONFIG_PRINTK) - mov pc, lr -ENDPROC(c_backtrace) -#else - stmfd sp!, {r4 - r8, lr} @ Save an extra register so we have a location... - movs frame, r0 @ if frame pointer is zero - beq no_frame @ we have no stack frames - - tst r1, #0x10 @ 26 or 32-bit mode? - ARM( moveq mask, #0xfc000003 ) - THUMB( moveq mask, #0xfc000000 ) - THUMB( orreq mask, #0x03 ) - movne mask, #0 @ mask for 32-bit - -1: stmfd sp!, {pc} @ calculate offset of PC stored - ldr r0, [sp], #4 @ by stmfd for this CPU - adr r1, 1b - sub offset, r0, r1 - -/* - * Stack frame layout: - * optionally saved caller registers (r4 - r10) - * saved fp - * saved sp - * saved lr - * frame => saved pc - * optionally saved arguments (r0 - r3) - * saved sp => <next word> - * - * Functions start with the following code sequence: - * mov ip, sp - * stmfd sp!, {r0 - r3} (optional) - * corrected pc => stmfd sp!, {..., fp, ip, lr, pc} - */ -for_each_frame: tst frame, mask @ Check for address exceptions - bne no_frame - -1001: ldr sv_pc, [frame, #0] @ get saved pc -1002: ldr sv_fp, [frame, #-12] @ get saved fp - - sub sv_pc, sv_pc, offset @ Correct PC for prefetching - bic sv_pc, sv_pc, mask @ mask PC/LR for the mode - -1003: ldr r2, [sv_pc, #-4] @ if stmfd sp!, {args} exists, - ldr r3, .Ldsi+4 @ adjust saved 'pc' back one - teq r3, r2, lsr #10 @ instruction - subne r0, sv_pc, #4 @ allow for mov - subeq r0, sv_pc, #8 @ allow for mov + stmia - - ldr r1, [frame, #-4] @ get saved lr - mov r2, frame - bic r1, r1, mask @ mask PC/LR for the mode - bl dump_backtrace_entry - - ldr r1, [sv_pc, #-4] @ if stmfd sp!, {args} exists, - ldr r3, .Ldsi+4 - teq r3, r1, lsr #10 - ldreq r0, [frame, #-8] @ get sp - subeq r0, r0, #4 @ point at the last arg - bleq .Ldumpstm @ dump saved registers - -1004: ldr r1, [sv_pc, #0] @ if stmfd sp!, {..., fp, ip, lr, pc} - ldr r3, .Ldsi @ instruction exists, - teq r3, r1, lsr #10 - subeq r0, frame, #16 - bleq .Ldumpstm @ dump saved registers - - teq sv_fp, #0 @ zero saved fp means - beq no_frame @ no further frames - - cmp sv_fp, frame @ next frame must be - mov frame, sv_fp @ above the current frame - bhi for_each_frame - -1006: adr r0, .Lbad - mov r1, frame - bl printk -no_frame: ldmfd sp!, {r4 - r8, pc} -ENDPROC(c_backtrace) - - .pushsection __ex_table,"a" - .align 3 - .long 1001b, 1006b - .long 1002b, 1006b - .long 1003b, 1006b - .long 1004b, 1006b - .popsection - -#define instr r4 -#define reg r5 -#define stack r6 - -.Ldumpstm: stmfd sp!, {instr, reg, stack, r7, lr} - mov stack, r0 - mov instr, r1 - mov reg, #10 - mov r7, #0 -1: mov r3, #1 - ARM( tst instr, r3, lsl reg ) - THUMB( lsl r3, reg ) - THUMB( tst instr, r3 ) - beq 2f - add r7, r7, #1 - teq r7, #6 - moveq r7, #1 - moveq r1, #'\n' - movne r1, #' ' - ldr r3, [stack], #-4 - mov r2, reg - adr r0, .Lfp - bl printk -2: subs reg, reg, #1 - bpl 1b - teq r7, #0 - adrne r0, .Lcr - blne printk - ldmfd sp!, {instr, reg, stack, r7, pc} - -.Lfp: .asciz "%cr%d:%08x" -.Lcr: .asciz "\n" -.Lbad: .asciz "Backtrace aborted due to bad frame pointer <%p>\n" - .align -.Ldsi: .word 0xe92dd800 >> 10 @ stmfd sp!, {... fp, ip, lr, pc} - .word 0xe92d0000 >> 10 @ stmfd sp!, {} - -#endif |