From ecd43afdbe72017aefe48080631eb625e177ef4d Mon Sep 17 00:00:00 2001 From: Vineet Gupta Date: Sun, 8 Jan 2017 19:45:48 -0800 Subject: [PATCH] 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 --- arch/arc/include/asm/entry-arcv2.h | 2 ++ arch/arc/include/asm/ptrace.h | 2 +- 2 files changed, 3 insertions(+), 1 deletion(-) 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; -- 2.39.5