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authorVineet Gupta <vgupta@synopsys.com>2017-01-08 19:45:48 -0800
committerVineet Gupta <vgupta@synopsys.com>2017-01-10 11:51:33 -0800
commitecd43afdbe72017aefe48080631eb625e177ef4d (patch)
tree6df7b0bc6670f85116f1d256ed7df55885b910d9
parente51d5d02f688c45b6f644f472f0c80fdfa73f0cb (diff)
downloadlinux-ecd43afdbe72017aefe48080631eb625e177ef4d.tar.bz2
ARCv2: save r30 on kernel entry as gcc uses it for code-gen
This is not exposed to userspace debugers yet, which can be done independently as a seperate patch ! Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
-rw-r--r--arch/arc/include/asm/entry-arcv2.h2
-rw-r--r--arch/arc/include/asm/ptrace.h2
2 files changed, 3 insertions, 1 deletions
diff --git a/arch/arc/include/asm/entry-arcv2.h b/arch/arc/include/asm/entry-arcv2.h
index b5ff87e6f4b7..aee1a77934cf 100644
--- a/arch/arc/include/asm/entry-arcv2.h
+++ b/arch/arc/include/asm/entry-arcv2.h
@@ -16,6 +16,7 @@
;
; Now manually save: r12, sp, fp, gp, r25
+ PUSH r30
PUSH r12
; Saving pt_regs->sp correctly requires some extra work due to the way
@@ -72,6 +73,7 @@
POPAX AUX_USER_SP
1:
POP r12
+ POP r30
.endm
diff --git a/arch/arc/include/asm/ptrace.h b/arch/arc/include/asm/ptrace.h
index 69095da1fcfd..47111d565a95 100644
--- a/arch/arc/include/asm/ptrace.h
+++ b/arch/arc/include/asm/ptrace.h
@@ -84,7 +84,7 @@ struct pt_regs {
unsigned long fp;
unsigned long sp; /* user/kernel sp depending on where we came from */
- unsigned long r12;
+ unsigned long r12, r30;
/*------- Below list auto saved by h/w -----------*/
unsigned long r0, r1, r2, r3, r4, r5, r6, r7, r8, r9, r10, r11;