From 6625f7173bcb4f33a1c92b549fa82b6c6e026664 Mon Sep 17 00:00:00 2001 From: Eric Yilun Lin Date: Mon, 11 Jan 2021 12:13:50 +0800 Subject: cortex-m/m0: uses BL reg as SW PANIC info This provides more information when we hit the div_by_zero exception, since the register dump in panic info might be missing sometimes. BUG=b:177091249 TEST=crash divzero, and see the R5 provides BL reg BRANCH=none Change-Id: Icf617a01f0d93d1997812e9d8d44d4489f6a418a Signed-off-by: Eric Yilun Lin Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/2620723 Reviewed-by: Tzung-Bi Shih Reviewed-by: Ting Shen --- third_party/libaeabi-cortexm0/core/cortex-m/uldivmod.S | 1 + third_party/libaeabi-cortexm0/core/cortex-m0/div.S | 1 + third_party/libaeabi-cortexm0/core/cortex-m0/uldivmod.S | 1 + 3 files changed, 3 insertions(+) (limited to 'third_party') diff --git a/third_party/libaeabi-cortexm0/core/cortex-m/uldivmod.S b/third_party/libaeabi-cortexm0/core/cortex-m/uldivmod.S index da60793e67..63f060891b 100644 --- a/third_party/libaeabi-cortexm0/core/cortex-m/uldivmod.S +++ b/third_party/libaeabi-cortexm0/core/cortex-m/uldivmod.S @@ -176,4 +176,5 @@ L_done_sub4: __aeabi_ldiv0: ldr SOFTWARE_PANIC_REASON_REG, =PANIC_SW_DIV_ZERO + mov SOFTWARE_PANIC_INFO_REG, r14 bl exception_panic diff --git a/third_party/libaeabi-cortexm0/core/cortex-m0/div.S b/third_party/libaeabi-cortexm0/core/cortex-m0/div.S index 898ecafe83..06dc7afacb 100644 --- a/third_party/libaeabi-cortexm0/core/cortex-m0/div.S +++ b/third_party/libaeabi-cortexm0/core/cortex-m0/div.S @@ -163,4 +163,5 @@ L_dont_sub0: __aeabi_idiv0: ldr SOFTWARE_PANIC_REASON_REG, =PANIC_SW_DIV_ZERO + mov SOFTWARE_PANIC_INFO_REG, r14 bl exception_panic diff --git a/third_party/libaeabi-cortexm0/core/cortex-m0/uldivmod.S b/third_party/libaeabi-cortexm0/core/cortex-m0/uldivmod.S index 269645268b..6c0a469d65 100644 --- a/third_party/libaeabi-cortexm0/core/cortex-m0/uldivmod.S +++ b/third_party/libaeabi-cortexm0/core/cortex-m0/uldivmod.S @@ -174,4 +174,5 @@ L_dont_sub4: __aeabi_ldiv0: ldr SOFTWARE_PANIC_REASON_REG, =PANIC_SW_DIV_ZERO + mov SOFTWARE_PANIC_INFO_REG, r14 bl exception_panic -- cgit v1.2.1