From mboxrd@z Thu Jan 1 00:00:00 1970 From: geoff@infradead.org (Geoff Levand) Date: Thu, 16 Jun 2016 23:48:28 +0000 Subject: [PATCH v19 10/13] arm64: kdump: add VMCOREINFO's for user-space coredump tools In-Reply-To: References: Message-ID: <6e96110e85e7b1167043d789e85f9c916fdf281a.1466120418.git.geoff@infradead.org> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org From: AKASHI Takahiro 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 f270967..57a30fb 100644 --- a/arch/arm64/kernel/machine_kexec.c +++ b/arch/arm64/kernel/machine_kexec.c @@ -18,6 +18,7 @@ #include #include +#include #include #include "cpu-reset.h" @@ -278,3 +279,13 @@ 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); +} -- 2.5.0 From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Message-Id: <6e96110e85e7b1167043d789e85f9c916fdf281a.1466120418.git.geoff@infradead.org> In-Reply-To: References: From: Geoff Levand Subject: [PATCH v19 10/13] arm64: kdump: add VMCOREINFO's for user-space coredump tools Date: Thu, 16 Jun 2016 23:48:28 +0000 List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "kexec" Errors-To: kexec-bounces+dwmw2=infradead.org@lists.infradead.org To: Catalin Marinas , Will Deacon Cc: Mark Rutland , marc.zyngier@arm.com, kexec@lists.infradead.org, AKASHI Takahiro , James Morse , linux-arm-kernel@lists.infradead.org From: AKASHI Takahiro 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 f270967..57a30fb 100644 --- a/arch/arm64/kernel/machine_kexec.c +++ b/arch/arm64/kernel/machine_kexec.c @@ -18,6 +18,7 @@ #include #include +#include #include #include "cpu-reset.h" @@ -278,3 +279,13 @@ 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); +} -- 2.5.0 _______________________________________________ kexec mailing list kexec@lists.infradead.org http://lists.infradead.org/mailman/listinfo/kexec