From mboxrd@z Thu Jan 1 00:00:00 1970 From: takahiro.akashi@linaro.org (AKASHI Takahiro) Date: Tue, 12 Jul 2016 14:05:11 +0900 Subject: [PATCH v22 5/8] arm64: kdump: add VMCOREINFO's for user-space coredump tools In-Reply-To: <20160712050514.22307-1-takahiro.akashi@linaro.org> References: <20160712050514.22307-1-takahiro.akashi@linaro.org> Message-ID: <20160712050514.22307-6-takahiro.akashi@linaro.org> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org For the current crash utility, we need to know, at least, - kimage_voffset - PHYS_OFFSET to handle the contents of core dump file (/proc/vmcore) correctly due to the introduction of KASLR (CONFIG_RANDOMIZE_BASE) in v4.6. This patch puts them as VMCOREINFO's into the file. - VA_BITS is also added for makedumpfile command. More VMCOREINFO's may be added later. Signed-off-by: AKASHI Takahiro --- arch/arm64/kernel/machine_kexec.c | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/arch/arm64/kernel/machine_kexec.c b/arch/arm64/kernel/machine_kexec.c index 8ac9dba8..38b4411 100644 --- a/arch/arm64/kernel/machine_kexec.c +++ b/arch/arm64/kernel/machine_kexec.c @@ -17,6 +17,7 @@ #include #include +#include #include #include "cpu-reset.h" @@ -260,3 +261,13 @@ void machine_crash_shutdown(struct pt_regs *regs) pr_info("Starting crashdump kernel...\n"); } + +void arch_crash_save_vmcoreinfo(void) +{ + VMCOREINFO_NUMBER(VA_BITS); + /* Please note VMCOREINFO_NUMBER() uses "%d", not "%x" */ + vmcoreinfo_append_str("NUMBER(kimage_voffset)=0x%llx\n", + kimage_voffset); + vmcoreinfo_append_str("NUMBER(PHYS_OFFSET)=0x%llx\n", + PHYS_OFFSET); +} -- 2.9.0