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Date: Wed, 09 Oct 2013 01:14:37 +0100
From: Al Viro <viro@....linux.org.uk>
To: torvalds@...ux-foundation.org
Cc: linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [RFC][PATCH 03/13] switch elf_core_write_extra_phdrs() to
dump_emit()
Signed-off-by: Al Viro <viro@...iv.linux.org.uk>
---
arch/ia64/kernel/elfcore.c | 6 ++----
arch/x86/um/elfcore.c | 7 ++-----
fs/binfmt_elf.c | 4 ++--
fs/binfmt_elf_fdpic.c | 4 +++-
include/linux/elfcore.h | 5 +++--
kernel/elfcore.c | 10 +++-------
6 files changed, 15 insertions(+), 21 deletions(-)
diff --git a/arch/ia64/kernel/elfcore.c b/arch/ia64/kernel/elfcore.c
index bac1639..798ce54 100644
--- a/arch/ia64/kernel/elfcore.c
+++ b/arch/ia64/kernel/elfcore.c
@@ -11,8 +11,7 @@ Elf64_Half elf_core_extra_phdrs(void)
return GATE_EHDR->e_phnum;
}
-int elf_core_write_extra_phdrs(struct file *file, loff_t offset, size_t *size,
- unsigned long limit)
+int elf_core_write_extra_phdrs(struct coredump_params *cprm, loff_t offset)
{
const struct elf_phdr *const gate_phdrs =
(const struct elf_phdr *) (GATE_ADDR + GATE_EHDR->e_phoff);
@@ -35,8 +34,7 @@ int elf_core_write_extra_phdrs(struct file *file, loff_t offset, size_t *size,
phdr.p_offset += ofs;
}
phdr.p_paddr = 0; /* match other core phdrs */
- *size += sizeof(phdr);
- if (*size > limit || !dump_write(file, &phdr, sizeof(phdr)))
+ if (!dump_emit(cprm, &phdr, sizeof(phdr)))
return 0;
}
return 1;
diff --git a/arch/x86/um/elfcore.c b/arch/x86/um/elfcore.c
index 6bb49b6..fc21f98 100644
--- a/arch/x86/um/elfcore.c
+++ b/arch/x86/um/elfcore.c
@@ -11,8 +11,7 @@ Elf32_Half elf_core_extra_phdrs(void)
return vsyscall_ehdr ? (((struct elfhdr *)vsyscall_ehdr)->e_phnum) : 0;
}
-int elf_core_write_extra_phdrs(struct file *file, loff_t offset, size_t *size,
- unsigned long limit)
+int elf_core_write_extra_phdrs(struct coredump_params *cprm, loff_t offset)
{
if ( vsyscall_ehdr ) {
const struct elfhdr *const ehdrp =
@@ -32,9 +31,7 @@ int elf_core_write_extra_phdrs(struct file *file, loff_t offset, size_t *size,
phdr.p_offset += ofs;
}
phdr.p_paddr = 0; /* match other core phdrs */
- *size += sizeof(phdr);
- if (*size > limit
- || !dump_write(file, &phdr, sizeof(phdr)))
+ if (!dump_emit(cprm, &phdr, sizeof(phdr)))
return 0;
}
}
diff --git a/fs/binfmt_elf.c b/fs/binfmt_elf.c
index 4bdf6b6..aba4199 100644
--- a/fs/binfmt_elf.c
+++ b/fs/binfmt_elf.c
@@ -2152,11 +2152,11 @@ static int elf_core_dump(struct coredump_params *cprm)
if (!dump_emit(cprm, &phdr, sizeof(phdr)))
goto end_coredump;
}
- size = cprm->written;
- if (!elf_core_write_extra_phdrs(cprm->file, offset, &size, cprm->limit))
+ if (!elf_core_write_extra_phdrs(cprm, offset))
goto end_coredump;
+ size = cprm->written;
cprm->written = foffset; /* will disappear */
/* write out the notes section */
if (!write_note_info(&info, cprm))
diff --git a/fs/binfmt_elf_fdpic.c b/fs/binfmt_elf_fdpic.c
index ea4c627..44db8b9 100644
--- a/fs/binfmt_elf_fdpic.c
+++ b/fs/binfmt_elf_fdpic.c
@@ -1791,9 +1791,11 @@ static int elf_fdpic_core_dump(struct coredump_params *cprm)
goto end_coredump;
}
- if (!elf_core_write_extra_phdrs(cprm->file, offset, &size, cprm->limit))
+ cprm->written = size;
+ if (!elf_core_write_extra_phdrs(cprm, offset))
goto end_coredump;
+ size = cprm->written;
/* write out the notes section */
for (i = 0; i < numnote; i++)
if (!writenote(notes + i, cprm->file, &foffset))
diff --git a/include/linux/elfcore.h b/include/linux/elfcore.h
index cdd3d13..1b92a8c 100644
--- a/include/linux/elfcore.h
+++ b/include/linux/elfcore.h
@@ -6,6 +6,8 @@
#include <asm/elf.h>
#include <uapi/linux/elfcore.h>
+struct coredump_params;
+
static inline void elf_core_copy_regs(elf_gregset_t *elfregs, struct pt_regs *regs)
{
#ifdef ELF_CORE_COPY_REGS
@@ -63,8 +65,7 @@ static inline int elf_core_copy_task_xfpregs(struct task_struct *t, elf_fpxregse
*/
extern Elf_Half elf_core_extra_phdrs(void);
extern int
-elf_core_write_extra_phdrs(struct file *file, loff_t offset, size_t *size,
- unsigned long limit);
+elf_core_write_extra_phdrs(struct coredump_params *cprm, loff_t offset);
extern int
elf_core_write_extra_data(struct file *file, size_t *size, unsigned long limit);
extern size_t elf_core_extra_data_size(void);
diff --git a/kernel/elfcore.c b/kernel/elfcore.c
index ff915ef..e556751 100644
--- a/kernel/elfcore.c
+++ b/kernel/elfcore.c
@@ -1,23 +1,19 @@
#include <linux/elf.h>
#include <linux/fs.h>
#include <linux/mm.h>
-
-#include <asm/elf.h>
-
+#include <linux/binfmts.h>
Elf_Half __weak elf_core_extra_phdrs(void)
{
return 0;
}
-int __weak elf_core_write_extra_phdrs(struct file *file, loff_t offset, size_t *size,
- unsigned long limit)
+int __weak elf_core_write_extra_phdrs(struct coredump_params *cprm, loff_t offset)
{
return 1;
}
-int __weak elf_core_write_extra_data(struct file *file, size_t *size,
- unsigned long limit)
+int __weak elf_core_write_extra_data(struct coredump_params *cprm)
{
return 1;
}
--
1.7.2.5
--
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