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authorLinus Torvalds <torvalds@linux-foundation.org>2016-11-20 10:27:39 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2016-11-20 10:27:39 -0800
commit697ed8d03909140d95484d46d277a4e46d89b0e5 (patch)
treede8364a8e821af3da70e709f1de9470a9fbdd8c6 /arch/arm/lib/backtrace.S
parent77079b133f242d3e3710c9b89ed54458307e54ff (diff)
parent2a3811068fbc6bf09bb09d166b65394b091c1085 (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.S37
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}