When a crash occurs in thumbs mode the crash dump is incorrect. This is due
to the usage of a non-existing configuration variable CONFIG_ARM_THUMB in
the definition of macro thumb_mode(regs).
Use CONFIG_IS_ENABLED(SYS_THUMB_BUILD) to detect that the code has been
compiled for thumbs mode.
With the patch crash dumps indicate thumbs mode correctly.
On a system with thumbs mode:
=> exception unaligned
data abort
pc : [<8f7a2b52>] lr : [<8f7ab1ef>]
reloc pc : [<1780cb52>] lr : [<178151ef>]
sp : 8ed8c3f8 ip : 8f7a2b4d fp : 00000002
r10: 8f7f8228 r9 : 8ed95ea8 r8 : 8ed99488
r7 : 8f7ab141 r6 : 00000000 r5 : 8ed8c3f9 r4 : 8f7f6390
r3 : 8ed9948c r2 : 00000001 r1 : 00000000 r0 : 8f7f6390
Flags: nzCv IRQs off FIQs off Mode SVC_32 (T)
Code: 8f7e 466d f105 0501 (e9d5) 6700
The Flags line has '(T)' and in the Code line the output is in u16 groups.
On a system without thumbs mode:
=> exception breakpoint
prefetch abort
pc : [<7ff5a5c8>] lr : [<7ff675ec>]
reloc pc : [<0000e5c8>] lr : [<0001b5ec>]
sp : 7ee0ad80 ip : 7ff5a5cc fp : 7ff674cc
r10: 00000002 r9 : 7ef0bed8 r8 : 7ffd6214
r7 : 7ef0e080 r6 : 00000000 r5 : 7ffd4090 r4 : 00000000
r3 : 7ef0e084 r2 : 00000001 r1 : 00000000 r0 : 7ffd4090
Flags: nzCv IRQs off FIQs off Mode SVC_32
Code: e1a0500d e2855001 e1c560d0 e3a00001 (e12fff1e)
The Flags line does not show '(T)' and in the Code line the output is in
u32 groups.
Reported-by: Marek Vasut <ma...@denx.de>
Signed-off-by: Heinrich Schuchardt <xypron.g...@gmx.de>
---
arch/arm/include/asm/proc-armv/ptrace.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/arm/include/asm/proc-armv/ptrace.h
b/arch/arm/include/asm/proc-armv/ptrace.h
index 183b00a087..e37ad8fd1f 100644
--- a/arch/arm/include/asm/proc-armv/ptrace.h
+++ b/arch/arm/include/asm/proc-armv/ptrace.h
@@ -86,7 +86,7 @@ struct pt_regs {
#define user_mode(regs) \
(((regs)->ARM_cpsr & 0xf) == 0)
-#ifdef CONFIG_ARM_THUMB
+#if CONFIG_IS_ENABLED(SYS_THUMB_BUILD)
#define thumb_mode(regs) \
(((regs)->ARM_cpsr & T_BIT))
#else
--
2.20.1
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