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Tue, 12 Nov 2019 09:59:02 +0900 (KST) Received: from localhost.localdomain (unknown [10.113.221.222]) by epsmtip1.samsung.com (KnoxPortal) with ESMTPA id 20191112005902epsmtip1d75fb9d6eda70d25a77759d98613f160~WRGoNALhQ0613306133epsmtip1v; Tue, 12 Nov 2019 00:59:02 +0000 (GMT) From: Seung-Woo Kim To: linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, will@kernel.org, mark.rutland@arm.com, catalin.marinas@arm.com Cc: sw0312.kim@samsung.com, sungguk.na@samsung.com Subject: [PATCH] arm64: perf: Report arm pc registers for compat perf Date: Tue, 12 Nov 2019 10:01:41 +0900 Message-Id: <1573520501-29195-1-git-send-email-sw0312.kim@samsung.com> X-Mailer: git-send-email 1.7.4.1 X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFrrJKsWRmVeSWpSXmKPExsWy7bCmge515lOxBpcesVu8X9bDaLHp8TVW i8u75rBZLL1+kclix7yDjBYzJr9ks2i5Y+rA7rFm3hpGj02rOtk8Ni+p9+jbsorR4/MmuQDW qGybjNTElNQihdS85PyUzLx0WyXv4HjneFMzA0NdQ0sLcyWFvMTcVFslF58AXbfMHKAjlBTK EnNKgUIBicXFSvp2NkX5pSWpChn5xSW2SqkFKTkFlgV6xYm5xaV56XrJ+blWhgYGRqZAhQnZ GXuWT2QuaOGo2HemkbmBcT9bFyMnh4SAicTjxzfYuxi5OIQEdjBKPGnbwAjhfGKUWL7qKCuE 841R4sSZRUBlHGAtW2+kQMT3Mkp8XXQLqugLkPP1JiPIXDYBHYn9S36DJUQEOhgl9vyfwwjS zSxgJPH2OjNIjbCAq8SJS0/YQWwWAVWJLZ07weK8Am4SHxbOZYK4T0Fiwb23bCBzJAQ62CSe bfjDDpFwkfj7YTULhC0s8er4Fqi4lMTL/jYou1pi+4Sf7FDNjBI97Y1QDcYS+5dOZoI4SFNi /S59iLCixM7fc8EeYBbgk3j3tYcV4mNeiY42IYgSFYmdRyexQYSlJGZtCIYIe0gsO7gErFpI IFbiw1btCYyysxDGL2BkXMUollpQnJueWmxYYIgcR5sYwclKy3QH45RzPocYBTgYlXh4GRJO xgqxJpYVV+YeYpTgYFYS4d1RcSJWiDclsbIqtSg/vqg0J7X4EKMpMOwmMkuJJucDE2leSbyh qZGxsbGFiaGZqaGhkjiv4/KlsUIC6YklqdmpqQWpRTB9TBycUg2ME+LZf93h2FJ+2rL1qMXq 4EXtxnyTHvxT224usnzSb9XNiZ93dLP8Fay+eYn9YdiJCLHLNj8XnyjXqwn5LBtZfqpbruCG S9aeuXP3uLGJxezZb/FgncFM1678d17H3jwpqJ/H5TSvcefB6SoZXzYU3HnEG/f4psgxMy23 7uP7P2zjSJuqF+t4TYmlOCPRUIu5qDgRAA5At4VsAwAA X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFupgluLIzCtJLcpLzFFi42LZdlhJTvca86lYg2cdPBbvl/UwWmx6fI3V 4vKuOWwWS69fZLLYMe8go8WMyS/ZLFrumDqwe6yZt4bRY9OqTjaPzUvqPfq2rGL0+LxJLoA1 issmJTUnsyy1SN8ugStjz/KJzAUtHBX7zjQyNzDuZ+ti5OCQEDCR2HojpYuRi0NIYDejxP5X /1i6GDmB4lISc79tZ4SoEZY4fLgYJCwk8IlR4uVVExCbTUBHYv+S36wgvSICfYwSb85uYAVJ MAPNfHtyLzuILSzgKnHi0hMwm0VAVWJL505mEJtXwE3iw8K5TBC7FCQW3HvLNoGRZwEjwypG ydSC4tz03GLDAsO81HK94sTc4tK8dL3k/NxNjODw0dLcwXh5SfwhRgEORiUe3hWxJ2OFWBPL iitzDzFKcDArifDuqDgRK8SbklhZlVqUH19UmpNafIhRmoNFSZz3ad6xSCGB9MSS1OzU1ILU IpgsEwenVANjIXPLnyl1qfWhvj/OW7y563LB9HhJuUidTc0Xg9KJu7P29OvKmnFMO9D2+9Wq jUz1mrHd3NEaRb1Fi9t0ld7srdbgvdwrYbw/8uXH9f6Z8p4n3dxLN+abr+TOuLNLOE2jxFZ7 yrN/sXet4zxbex4+nx3xhims6g3LWqbZNXt31q+ZePjzqQ9KLMUZiYZazEXFiQC0WWFzGwIA AA== X-CMS-MailID: 20191112005902epcas1p2d9dfa6a29f2c57669b1c1eb58517016d X-Msg-Generator: CA Content-Type: text/plain; charset="utf-8" X-Sendblock-Type: SVC_REQ_APPROVE CMS-TYPE: 101P DLP-Filter: Pass X-CFilter-Loop: Reflected X-CMS-RootMailID: 20191112005902epcas1p2d9dfa6a29f2c57669b1c1eb58517016d References: Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org If perf is built as arm 32-bit, it only reads 15 registers as arm 32-bit register map and this breaks dwarf call-chain in compat perf because pc register information is not filled. Report arm pc registers for 32-bit compat perf. Without this, arm 32-bit perf dwarf call-graph shows below verbose message: unwind: reg 15, val 0 unwind: reg 13, val ffbc6360 unwind: no map for 0 Signed-off-by: Seung-Woo Kim --- arch/arm64/kernel/perf_regs.c | 2 ++ 1 files changed, 2 insertions(+), 0 deletions(-) diff --git a/arch/arm64/kernel/perf_regs.c b/arch/arm64/kernel/perf_regs.c index 0bbac61..d4172e7 100644 --- a/arch/arm64/kernel/perf_regs.c +++ b/arch/arm64/kernel/perf_regs.c @@ -24,6 +24,8 @@ u64 perf_reg_value(struct pt_regs *regs, int idx) return regs->compat_sp; if ((u32)idx == PERF_REG_ARM64_LR) return regs->compat_lr; + if ((u32)idx == 15) /* PERF_REG_ARM_PC */ + return regs->pc; } if ((u32)idx == PERF_REG_ARM64_SP) -- 1.7.4.1