From: Tejun Heo <tj@kernel.org>
Date: Mon, 9 Feb 2009 13:17:39 +0000 (+0900)
Subject: elf: add ELF_CORE_COPY_KERNEL_REGS()
X-Git-Tag: v2.6.30-rc1~2^2~50^2~37
X-Git-Url: https://openfabrics.org/gitweb/?a=commitdiff_plain;h=6cd61c0baa8bce32271226198b46c67a7a05d108;p=~shefty%2Frdma-dev.git

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: Tejun Heo <tj@kernel.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
---

diff --git a/include/linux/elfcore.h b/include/linux/elfcore.h
index 5ca54d77079..7605c5e9589 100644
--- a/include/linux/elfcore.h
+++ b/include/linux/elfcore.h
@@ -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
diff --git a/kernel/kexec.c b/kernel/kexec.c
index 8a6d7b08864..795e7b67a22 100644
--- a/kernel/kexec.c
+++ b/kernel/kexec.c
@@ -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);