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Commit 6cd61c0b authored by Tejun Heo's avatar Tejun Heo Committed by Ingo Molnar
Browse files

elf: add ELF_CORE_COPY_KERNEL_REGS() 



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: default avatarTejun Heo <tj@kernel.org>
Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
parent 92e2d508

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);