diff options
author | Linus Torvalds <torvalds@linux-foundation.org> | 2016-11-20 10:27:39 -0800 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2016-11-20 10:27:39 -0800 |
commit | 697ed8d03909140d95484d46d277a4e46d89b0e5 (patch) | |
tree | de8364a8e821af3da70e709f1de9470a9fbdd8c6 /arch/arm/lib/backtrace.S | |
parent | 77079b133f242d3e3710c9b89ed54458307e54ff (diff) | |
parent | 2a3811068fbc6bf09bb09d166b65394b091c1085 (diff) |
Merge branch 'fixes' of git://git.armlinux.org.uk/~rmk/linux-arm
Pull ARM fixes from Russell King:
"A few more ARM fixes:
- the assembly backtrace code suffers problems with the new printk()
implementation which assumes that kernel messages without KERN_CONT
should have newlines inserted between them. Fix this.
- fix a section naming error - ".init.text" rather than ".text.init"
- preallocate DMA debug memory at core_initcall() time rather than
fs_initcall(), as we have some core drivers that need to use DMA
mapping - and that triggers a kernel warning from the DMA debug
code.
- fix XIP kernels after the ro_after_init changes made this data
permanently read-only"
* 'fixes' of git://git.armlinux.org.uk/~rmk/linux-arm:
ARM: Fix XIP kernels
ARM: 8628/1: dma-mapping: preallocate DMA-debug hash tables in core_initcall
ARM: 8624/1: proc-v7m.S: fix init section name
ARM: fix backtrace
Diffstat (limited to 'arch/arm/lib/backtrace.S')
-rw-r--r-- | arch/arm/lib/backtrace.S | 37 |
1 files changed, 3 insertions, 34 deletions
diff --git a/arch/arm/lib/backtrace.S b/arch/arm/lib/backtrace.S index fab5a50503ae..7d7952e5a3b1 100644 --- a/arch/arm/lib/backtrace.S +++ b/arch/arm/lib/backtrace.S @@ -10,6 +10,7 @@ * 27/03/03 Ian Molton Clean up CONFIG_CPU * */ +#include <linux/kern_levels.h> #include <linux/linkage.h> #include <asm/assembler.h> .text @@ -83,13 +84,13 @@ for_each_frame: tst frame, mask @ Check for address exceptions teq r3, r1, lsr #11 ldreq r0, [frame, #-8] @ get sp subeq r0, r0, #4 @ point at the last arg - bleq .Ldumpstm @ dump saved registers + bleq dump_backtrace_stm @ 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 #11 subeq r0, frame, #16 - bleq .Ldumpstm @ dump saved registers + bleq dump_backtrace_stm @ dump saved registers teq sv_fp, #0 @ zero saved fp means beq no_frame @ no further frames @@ -112,38 +113,6 @@ ENDPROC(c_backtrace) .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, #0 - adr r3, .Lcr - addne r3, r3, #1 @ skip newline - ldr r2, [stack], #-4 - mov r1, 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 " r%d:%08x%s" -.Lcr: .asciz "\n" .Lbad: .asciz "Backtrace aborted due to bad frame pointer <%p>\n" .align .Ldsi: .word 0xe92dd800 >> 11 @ stmfd sp!, {... fp, ip, lr, pc} |