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-rw-r--r--arch/arm/include/asm/bug.h3
-rw-r--r--arch/arm/include/asm/traps.h3
-rw-r--r--arch/arm/kernel/traps.c9
-rw-r--r--arch/arm/kernel/unwind.c2
-rw-r--r--arch/arm/lib/backtrace-clang.S9
-rw-r--r--arch/arm/lib/backtrace.S14
6 files changed, 27 insertions, 13 deletions
diff --git a/arch/arm/include/asm/bug.h b/arch/arm/include/asm/bug.h
index deef4d0cb3b5..673c7dd75ab9 100644
--- a/arch/arm/include/asm/bug.h
+++ b/arch/arm/include/asm/bug.h
@@ -82,7 +82,8 @@ void hook_ifault_code(int nr, int (*fn)(unsigned long, unsigned int,
struct pt_regs *),
int sig, int code, const char *name);
-extern asmlinkage void c_backtrace(unsigned long fp, int pmode);
+extern asmlinkage void c_backtrace(unsigned long fp, int pmode,
+ const char *loglvl);
struct mm_struct;
void show_pte(const char *lvl, struct mm_struct *mm, unsigned long addr);
diff --git a/arch/arm/include/asm/traps.h b/arch/arm/include/asm/traps.h
index 172b08ff3760..987fefb0a4db 100644
--- a/arch/arm/include/asm/traps.h
+++ b/arch/arm/include/asm/traps.h
@@ -29,7 +29,8 @@ static inline int __in_irqentry_text(unsigned long ptr)
}
extern void __init early_trap_init(void *);
-extern void dump_backtrace_entry(unsigned long where, unsigned long from, unsigned long frame);
+extern void dump_backtrace_entry(unsigned long where, unsigned long from,
+ unsigned long frame, const char *loglvl);
extern void ptrace_break(struct pt_regs *regs);
extern void *vectors_page;
diff --git a/arch/arm/kernel/traps.c b/arch/arm/kernel/traps.c
index 316a7687f813..7bba15fdce9f 100644
--- a/arch/arm/kernel/traps.c
+++ b/arch/arm/kernel/traps.c
@@ -62,7 +62,8 @@ __setup("user_debug=", user_debug_setup);
static void dump_mem(const char *, const char *, unsigned long, unsigned long);
-void dump_backtrace_entry(unsigned long where, unsigned long from, unsigned long frame)
+void dump_backtrace_entry(unsigned long where, unsigned long from,
+ unsigned long frame, const char *loglvl)
{
unsigned long end = frame + 4 + sizeof(struct pt_regs);
@@ -76,7 +77,7 @@ void dump_backtrace_entry(unsigned long where, unsigned long from, unsigned long
dump_mem("", "Exception stack", frame + 4, end);
}
-void dump_backtrace_stm(u32 *stack, u32 instruction)
+void dump_backtrace_stm(u32 *stack, u32 instruction, const char *loglvl)
{
char str[80], *p;
unsigned int x;
@@ -238,7 +239,7 @@ static void dump_backtrace(struct pt_regs *regs, struct task_struct *tsk)
pr_cont("\n");
if (ok)
- c_backtrace(fp, mode);
+ c_backtrace(fp, mode, NULL);
}
#endif
@@ -666,7 +667,7 @@ asmlinkage int arm_syscall(int no, struct pt_regs *regs)
dump_instr("", regs);
if (user_mode(regs)) {
__show_regs(regs);
- c_backtrace(frame_pointer(regs), processor_mode(regs));
+ c_backtrace(frame_pointer(regs), processor_mode(regs), NULL);
}
}
#endif
diff --git a/arch/arm/kernel/unwind.c b/arch/arm/kernel/unwind.c
index 11a964fd66f4..343cc27b36c4 100644
--- a/arch/arm/kernel/unwind.c
+++ b/arch/arm/kernel/unwind.c
@@ -493,7 +493,7 @@ void unwind_backtrace(struct pt_regs *regs, struct task_struct *tsk)
urc = unwind_frame(&frame);
if (urc < 0)
break;
- dump_backtrace_entry(where, frame.pc, frame.sp - 4);
+ dump_backtrace_entry(where, frame.pc, frame.sp - 4, NULL);
}
}
diff --git a/arch/arm/lib/backtrace-clang.S b/arch/arm/lib/backtrace-clang.S
index 2ff375144b55..6174c45f53a5 100644
--- a/arch/arm/lib/backtrace-clang.S
+++ b/arch/arm/lib/backtrace-clang.S
@@ -17,6 +17,7 @@
#define sv_pc r6
#define mask r7
#define sv_lr r8
+#define loglvl r9
ENTRY(c_backtrace)
@@ -99,6 +100,7 @@ ENDPROC(c_backtrace)
@ to ensure 8 byte alignment
movs frame, r0 @ if frame pointer is zero
beq no_frame @ we have no stack frames
+ mov loglvl, r2
tst r1, #0x10 @ 26 or 32-bit mode?
moveq mask, #0xfc000003
movne mask, #0 @ mask for 32-bit
@@ -167,6 +169,7 @@ finished_setup:
mov r1, sv_lr
mov r2, frame
bic r1, r1, mask @ mask PC/LR for the mode
+ mov r3, loglvl
bl dump_backtrace_entry
/*
@@ -183,6 +186,7 @@ finished_setup:
ldr r0, [frame] @ locals are stored in
@ the preceding frame
subeq r0, r0, #4
+ mov r2, loglvl
bleq dump_backtrace_stm @ dump saved registers
/*
@@ -196,7 +200,8 @@ finished_setup:
bhi for_each_frame
1006: adr r0, .Lbad
- mov r1, frame
+ mov r1, loglvl
+ mov r2, frame
bl printk
no_frame: ldmfd sp!, {r4 - r9, fp, pc}
ENDPROC(c_backtrace)
@@ -209,7 +214,7 @@ ENDPROC(c_backtrace)
.long 1005b, 1006b
.popsection
-.Lbad: .asciz "Backtrace aborted due to bad frame pointer <%p>\n"
+.Lbad: .asciz "%sBacktrace aborted due to bad frame pointer <%p>\n"
.align
.Lopcode: .word 0xe92d4800 >> 11 @ stmfd sp!, {... fp, lr}
.word 0x0b000000 @ bl if these bits are set
diff --git a/arch/arm/lib/backtrace.S b/arch/arm/lib/backtrace.S
index 582925238d65..872f658638d9 100644
--- a/arch/arm/lib/backtrace.S
+++ b/arch/arm/lib/backtrace.S
@@ -18,6 +18,7 @@
#define sv_pc r6
#define mask r7
#define offset r8
+#define loglvl r9
ENTRY(c_backtrace)
@@ -25,9 +26,10 @@ ENTRY(c_backtrace)
ret lr
ENDPROC(c_backtrace)
#else
- stmfd sp!, {r4 - r8, lr} @ Save an extra register so we have a location...
+ stmfd sp!, {r4 - r9, 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
+ mov loglvl, r2
tst r1, #0x10 @ 26 or 32-bit mode?
ARM( moveq mask, #0xfc000003 )
@@ -73,6 +75,7 @@ for_each_frame: tst frame, mask @ Check for address exceptions
ldr r1, [frame, #-4] @ get saved lr
mov r2, frame
bic r1, r1, mask @ mask PC/LR for the mode
+ mov r3, loglvl
bl dump_backtrace_entry
ldr r1, [sv_pc, #-4] @ if stmfd sp!, {args} exists,
@@ -80,12 +83,14 @@ 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
+ mov r2, loglvl
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
+ mov r2, loglvl
bleq dump_backtrace_stm @ dump saved registers
teq sv_fp, #0 @ zero saved fp means
@@ -96,9 +101,10 @@ for_each_frame: tst frame, mask @ Check for address exceptions
bhi for_each_frame
1006: adr r0, .Lbad
- mov r1, frame
+ mov r1, loglvl
+ mov r2, frame
bl printk
-no_frame: ldmfd sp!, {r4 - r8, pc}
+no_frame: ldmfd sp!, {r4 - r9, pc}
ENDPROC(c_backtrace)
.pushsection __ex_table,"a"
@@ -109,7 +115,7 @@ ENDPROC(c_backtrace)
.long 1004b, 1006b
.popsection
-.Lbad: .asciz "Backtrace aborted due to bad frame pointer <%p>\n"
+.Lbad: .asciz "%sBacktrace aborted due to bad frame pointer <%p>\n"
.align
.Ldsi: .word 0xe92dd800 >> 11 @ stmfd sp!, {... fp, ip, lr, pc}
.word 0xe92d0000 >> 11 @ stmfd sp!, {}
generated by cgit (git 2.34.1) at 2024-06-28 15:53:54 +0000