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-rw-r--r--arch/ia64/kernel/crash.c2
-rw-r--r--include/asm-arm/kexec.h2
-rw-r--r--include/asm-i386/kexec.h2
-rw-r--r--include/asm-ia64/kexec.h2
-rw-r--r--include/asm-mips/kexec.h2
-rw-r--r--include/asm-powerpc/kexec.h2
-rw-r--r--include/asm-s390/kexec.h2
-rw-r--r--include/asm-sh/kexec.h2
-rw-r--r--include/asm-x86_64/kexec.h2
-rw-r--r--include/linux/kexec.h17
-rw-r--r--kernel/kexec.c4
11 files changed, 19 insertions, 20 deletions
diff --git a/arch/ia64/kernel/crash.c b/arch/ia64/kernel/crash.c
index 3d51a3f77017..aeb79fb28f0b 100644
--- a/arch/ia64/kernel/crash.c
+++ b/arch/ia64/kernel/crash.c
@@ -74,7 +74,7 @@ crash_save_this_cpu(void)
buf = (u64 *) per_cpu_ptr(crash_notes, cpu);
if (!buf)
return;
- buf = append_elf_note(buf, "CORE", NT_PRSTATUS, prstatus,
+ buf = append_elf_note(buf, KEXEC_CORE_NOTE_NAME, NT_PRSTATUS, prstatus,
sizeof(*prstatus));
final_note(buf);
}
diff --git a/include/asm-arm/kexec.h b/include/asm-arm/kexec.h
index 8c1c6162a80c..b5b030ef633d 100644
--- a/include/asm-arm/kexec.h
+++ b/include/asm-arm/kexec.h
@@ -16,8 +16,6 @@
#ifndef __ASSEMBLY__
-#define MAX_NOTE_BYTES 1024
-
struct kimage;
/* Provide a dummy definition to avoid build failures. */
static inline void crash_setup_regs(struct pt_regs *newregs,
diff --git a/include/asm-i386/kexec.h b/include/asm-i386/kexec.h
index bcb5b21de2d2..4b9dc9e6b701 100644
--- a/include/asm-i386/kexec.h
+++ b/include/asm-i386/kexec.h
@@ -45,8 +45,6 @@
/* We can also handle crash dumps from 64 bit kernel. */
#define vmcore_elf_check_arch_cross(x) ((x)->e_machine == EM_X86_64)
-#define MAX_NOTE_BYTES 1024
-
/* CPU does not save ss and esp on stack if execution is already
* running in kernel mode at the time of NMI occurrence. This code
* fixes it.
diff --git a/include/asm-ia64/kexec.h b/include/asm-ia64/kexec.h
index 41299ddfee30..541be835fc5a 100644
--- a/include/asm-ia64/kexec.h
+++ b/include/asm-ia64/kexec.h
@@ -14,8 +14,6 @@
/* The native architecture */
#define KEXEC_ARCH KEXEC_ARCH_IA_64
-#define MAX_NOTE_BYTES 1024
-
#define kexec_flush_icache_page(page) do { \
unsigned long page_addr = (unsigned long)page_address(page); \
flush_icache_range(page_addr, page_addr + PAGE_SIZE); \
diff --git a/include/asm-mips/kexec.h b/include/asm-mips/kexec.h
index b25267ebcb09..cdbab43b7d3a 100644
--- a/include/asm-mips/kexec.h
+++ b/include/asm-mips/kexec.h
@@ -21,8 +21,6 @@
/* The native architecture */
#define KEXEC_ARCH KEXEC_ARCH_MIPS
-#define MAX_NOTE_BYTES 1024
-
static inline void crash_setup_regs(struct pt_regs *newregs,
struct pt_regs *oldregs)
{
diff --git a/include/asm-powerpc/kexec.h b/include/asm-powerpc/kexec.h
index 11cbdf81fd2e..b6f817b8ba3d 100644
--- a/include/asm-powerpc/kexec.h
+++ b/include/asm-powerpc/kexec.h
@@ -108,8 +108,6 @@ static inline void crash_setup_regs(struct pt_regs *newregs,
struct pt_regs *oldregs) { }
#endif /* !__powerpc64 __ */
-#define MAX_NOTE_BYTES 1024
-
extern void kexec_smp_wait(void); /* get and clear naca physid, wait for
master to copy new code to 0 */
extern int crashing_cpu;
diff --git a/include/asm-s390/kexec.h b/include/asm-s390/kexec.h
index 9c35c8ad1afd..7592af708b41 100644
--- a/include/asm-s390/kexec.h
+++ b/include/asm-s390/kexec.h
@@ -34,8 +34,6 @@
/* The native architecture */
#define KEXEC_ARCH KEXEC_ARCH_S390
-#define MAX_NOTE_BYTES 1024
-
/* Provide a dummy definition to avoid build failures. */
static inline void crash_setup_regs(struct pt_regs *newregs,
struct pt_regs *oldregs) { }
diff --git a/include/asm-sh/kexec.h b/include/asm-sh/kexec.h
index da36a7548601..00f4260ef09b 100644
--- a/include/asm-sh/kexec.h
+++ b/include/asm-sh/kexec.h
@@ -26,8 +26,6 @@
/* The native architecture */
#define KEXEC_ARCH KEXEC_ARCH_SH
-#define MAX_NOTE_BYTES 1024
-
static inline void crash_setup_regs(struct pt_regs *newregs,
struct pt_regs *oldregs)
{
diff --git a/include/asm-x86_64/kexec.h b/include/asm-x86_64/kexec.h
index 5fab957e1091..738e581b67f8 100644
--- a/include/asm-x86_64/kexec.h
+++ b/include/asm-x86_64/kexec.h
@@ -48,8 +48,6 @@
/* The native architecture */
#define KEXEC_ARCH KEXEC_ARCH_X86_64
-#define MAX_NOTE_BYTES 1024
-
/*
* Saving the registers of the cpu on which panic occured in
* crash_kexec to save a valid sp. The registers of other cpus
diff --git a/include/linux/kexec.h b/include/linux/kexec.h
index 696e5ec63f77..8c2c7fcd58ce 100644
--- a/include/linux/kexec.h
+++ b/include/linux/kexec.h
@@ -7,6 +7,8 @@
#include <linux/linkage.h>
#include <linux/compat.h>
#include <linux/ioport.h>
+#include <linux/elfcore.h>
+#include <linux/elf.h>
#include <asm/kexec.h>
/* Verify architecture specific macros are defined */
@@ -31,6 +33,19 @@
#error KEXEC_ARCH not defined
#endif
+#define KEXEC_NOTE_HEAD_BYTES ALIGN(sizeof(struct elf_note), 4)
+#define KEXEC_CORE_NOTE_NAME "CORE"
+#define KEXEC_CORE_NOTE_NAME_BYTES ALIGN(sizeof(KEXEC_CORE_NOTE_NAME), 4)
+#define KEXEC_CORE_NOTE_DESC_BYTES ALIGN(sizeof(struct elf_prstatus), 4)
+/*
+ * The per-cpu notes area is a list of notes terminated by a "NULL"
+ * note header. For kdump, the code in vmcore.c runs in the context
+ * of the second kernel to combine them into one note.
+ */
+#define KEXEC_NOTE_BYTES ( (KEXEC_NOTE_HEAD_BYTES * 2) + \
+ KEXEC_CORE_NOTE_NAME_BYTES + \
+ KEXEC_CORE_NOTE_DESC_BYTES )
+
/*
* This structure is used to hold the arguments that are used when loading
* kernel binaries.
@@ -136,7 +151,7 @@ extern struct kimage *kexec_crash_image;
/* Location of a reserved region to hold the crash kernel.
*/
extern struct resource crashk_res;
-typedef u32 note_buf_t[MAX_NOTE_BYTES/4];
+typedef u32 note_buf_t[KEXEC_NOTE_BYTES/4];
extern note_buf_t *crash_notes;
diff --git a/kernel/kexec.c b/kernel/kexec.c
index 2a59c8a01ae0..25db14b89e82 100644
--- a/kernel/kexec.c
+++ b/kernel/kexec.c
@@ -1118,8 +1118,8 @@ void crash_save_cpu(struct pt_regs *regs, int cpu)
memset(&prstatus, 0, sizeof(prstatus));
prstatus.pr_pid = current->pid;
elf_core_copy_regs(&prstatus.pr_reg, regs);
- buf = append_elf_note(buf, "CORE", NT_PRSTATUS, &prstatus,
- sizeof(prstatus));
+ buf = append_elf_note(buf, KEXEC_CORE_NOTE_NAME, NT_PRSTATUS,
+ &prstatus, sizeof(prstatus));
final_note(buf);
}
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.