Macro get_bad_stack used to load SVC mode stack pointer
in r13 and then re-use the register, without saving,
for further modifying the spsr, thus trashing the r13.
r13 is never loaded again after this.
Signed-off-by: Himanshu Chauhan <hschau...@nulltrace.org>
---
arch/arm/cpu/arm926ejs/start.S | 5 ++---
1 files changed, 2 insertions(+), 3 deletions(-)
diff --git a/arch/arm/cpu/arm926ejs/start.S b/arch/arm/cpu/arm926ejs/start.S
index 7397882..47d7aac 100644
--- a/arch/arm/cpu/arm926ejs/start.S
+++ b/arch/arm/cpu/arm926ejs/start.S
@@ -523,9 +523,8 @@ cpu_init_crit:
str lr, [r13] @ save caller lr in position 0 of saved stack
mrs lr, spsr @ get the spsr
str lr, [r13, #4] @ save spsr in position 1 of saved stack
- mov r13, #MODE_SVC @ prepare SVC-Mode
- @ msr spsr_c, r13
- msr spsr, r13 @ switch modes, make sure moves will execute
+ mov lr, #MODE_SVC @ prepare SVC-Mode
+ msr spsr, lr @ switch modes, make sure moves will execute
mov lr, pc @ capture return pc
movs pc, lr @ jump to next instruction & switch modes.
.endm
--
1.7.0.4
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