elf: add ELF_CORE_COPY_KERNEL_REGS() (6cd61c0b) · Commits · 戴 / test

ELF core dump is used for both user land core dump and kernel crash dump. Depending on architecture, register might need to be accessed differently for userland and kernel. Allow architectures to define ELF_CORE_COPY_KERNEL_REGS() and use different operation for kernel register dump. Signed-off-by:

Tejun Heo <tj@kernel.org> Signed-off-by:

Ingo Molnar <mingo@elte.hu>

include/linux/elfcore.h

+9 −0

Original line number	Diff line number	Diff line
		@@ -111,6 +111,15 @@ static inline void elf_core_copy_regs(elf_gregset_t elfregs, struct pt_regs re
		#endif
		}

		static inline void elf_core_copy_kernel_regs(elf_gregset_t elfregs, struct pt_regs regs)
		{
		#ifdef ELF_CORE_COPY_KERNEL_REGS
		ELF_CORE_COPY_KERNEL_REGS((*elfregs), regs);
		#else
		elf_core_copy_regs(elfregs, regs);
		#endif
		}

		static inline int elf_core_copy_task_regs(struct task_struct t, elf_gregset_t elfregs)
		{
		#ifdef ELF_CORE_COPY_TASK_REGS

kernel/kexec.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -1130,7 +1130,7 @@ void crash_save_cpu(struct pt_regs *regs, int cpu)
		return;
		memset(&prstatus, 0, sizeof(prstatus));
		prstatus.pr_pid = current->pid;
		elf_core_copy_regs(&prstatus.pr_reg, regs);
		elf_core_copy_kernel_regs(&prstatus.pr_reg, regs);
		buf = append_elf_note(buf, KEXEC_CORE_NOTE_NAME, NT_PRSTATUS,
		&prstatus, sizeof(prstatus));
		final_note(buf);

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