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Message-Id: <1187248823.11475.24.camel@mercury.analog.com>
Date: Thu, 16 Aug 2007 15:20:23 +0800
From: Jie Zhang <jie.zhang@...log.com>
To: linux-kernel@...r.kernel.org
Subject: [PATCH 1/2] Add a new field `name' to struct linux_binfmt
Blackfin arch supports two binfmts: `flat' and `FDPIC ELF'. Sometimes we
need deal with them differently. For example, when application crashes,
something like below will be dumped:
Undefined instruction
- May be used to emulate instructions that are not defined for
a particular processor implementation.
CURRENT PROCESS:
COMM=testmain PID=63
TEXT = 0x01180000-0x011dd258 DATA = 0x01300258-0x013ac4a0
BSS = 0x013ac4a0-0x010a0000 USER-STACK = 0x010bfec0
For `flat' binfmt, there is a sperate BSS. But for `FDPIC ELF', .bss is
usually put into the same segment as .data. So DATA has include .bss
section. The BSS for `FDPIC ELF' is meaningless and confusing, like the
one shown above. So I want to omit BSS for `FDPIC ELF' in dumping.
When mapping address to symbol in application, we also need deal with
`flat' and `FDPIC ELF' binfmts differently, since `flat' has a header
before the code.
This patch addes a new `name' field to struct linux_binfmt and
initialize it in each binfmt type.
A second blackfin arch patch will use this field to distinguish `flat'
binfmt with `FDPIC ELF'.
Is it OK? Any comments?
Thanks,
Jie
Signed-off-by: Jie Zhang <jie.zhang@...log.com>
---
fs/binfmt_aout.c | 3 ++-
fs/binfmt_elf.c | 3 ++-
fs/binfmt_elf_fdpic.c | 1 +
fs/binfmt_em86.c | 1 +
fs/binfmt_flat.c | 3 ++-
fs/binfmt_misc.c | 1 +
fs/binfmt_script.c | 1 +
fs/binfmt_som.c | 3 ++-
include/linux/binfmts.h | 1 +
9 files changed, 13 insertions(+), 4 deletions(-)
diff --git a/fs/binfmt_aout.c b/fs/binfmt_aout.c
index 813a887..a54a25e 100644
--- a/fs/binfmt_aout.c
+++ b/fs/binfmt_aout.c
@@ -38,7 +38,8 @@ static struct linux_binfmt aout_format = {
.load_binary = load_aout_binary,
.load_shlib = load_aout_library,
.core_dump = aout_core_dump,
- .min_coredump = PAGE_SIZE
+ .min_coredump = PAGE_SIZE,
+ .name = "aout"
};
#define BAD_ADDR(x) ((unsigned long)(x) >= TASK_SIZE)
diff --git a/fs/binfmt_elf.c b/fs/binfmt_elf.c
index 4482a06..5d1e039 100644
--- a/fs/binfmt_elf.c
+++ b/fs/binfmt_elf.c
@@ -77,7 +77,8 @@ static struct linux_binfmt elf_format = {
.load_shlib = load_elf_library,
.core_dump = elf_core_dump,
.min_coredump = ELF_EXEC_PAGESIZE,
- .hasvdso = 1
+ .hasvdso = 1,
+ .name = "ELF"
};
#define BAD_ADDR(x) ((unsigned long)(x) >= TASK_SIZE)
diff --git a/fs/binfmt_elf_fdpic.c b/fs/binfmt_elf_fdpic.c
index 2f5d8db..3eaa2ec 100644
--- a/fs/binfmt_elf_fdpic.c
+++ b/fs/binfmt_elf_fdpic.c
@@ -85,6 +85,7 @@ static struct linux_binfmt elf_fdpic_format = {
.core_dump = elf_fdpic_core_dump,
#endif
.min_coredump = ELF_EXEC_PAGESIZE,
+ .name = "ELF FDPIC"
};
static int __init init_elf_fdpic_binfmt(void)
diff --git a/fs/binfmt_em86.c b/fs/binfmt_em86.c
index 576dd7d..60036f9 100644
--- a/fs/binfmt_em86.c
+++ b/fs/binfmt_em86.c
@@ -97,6 +97,7 @@ static int load_em86(struct linux_binprm *bprm,struct pt_regs *regs)
static struct linux_binfmt em86_format = {
.module = THIS_MODULE,
.load_binary = load_em86,
+ .name = "em86"
};
static int __init init_em86_binfmt(void)
diff --git a/fs/binfmt_flat.c b/fs/binfmt_flat.c
index 861141b..b21deee 100644
--- a/fs/binfmt_flat.c
+++ b/fs/binfmt_flat.c
@@ -81,7 +81,8 @@ static struct linux_binfmt flat_format = {
.module = THIS_MODULE,
.load_binary = load_flat_binary,
.core_dump = flat_core_dump,
- .min_coredump = PAGE_SIZE
+ .min_coredump = PAGE_SIZE,
+ .name = "flat"
};
/****************************************************************************/
diff --git a/fs/binfmt_misc.c b/fs/binfmt_misc.c
index 42e94b3..6df9da0 100644
--- a/fs/binfmt_misc.c
+++ b/fs/binfmt_misc.c
@@ -737,6 +737,7 @@ static int bm_get_sb(struct file_system_type *fs_type,
static struct linux_binfmt misc_format = {
.module = THIS_MODULE,
.load_binary = load_misc_binary,
+ .name = "misc"
};
static struct file_system_type bm_fs_type = {
diff --git a/fs/binfmt_script.c b/fs/binfmt_script.c
index 4d0e0f6..cdec898 100644
--- a/fs/binfmt_script.c
+++ b/fs/binfmt_script.c
@@ -100,6 +100,7 @@ static int load_script(struct linux_binprm *bprm,struct pt_regs *regs)
static struct linux_binfmt script_format = {
.module = THIS_MODULE,
.load_binary = load_script,
+ .name = "script"
};
static int __init init_script_binfmt(void)
diff --git a/fs/binfmt_som.c b/fs/binfmt_som.c
index 5bcdaaf..4041d84 100644
--- a/fs/binfmt_som.c
+++ b/fs/binfmt_som.c
@@ -58,7 +58,8 @@ static struct linux_binfmt som_format = {
.load_binary = load_som_binary,
.load_shlib = load_som_library,
.core_dump = som_core_dump,
- .min_coredump = SOM_PAGESIZE
+ .min_coredump = SOM_PAGESIZE,
+ .name = "SOM"
};
/*
diff --git a/include/linux/binfmts.h b/include/linux/binfmts.h
index 91c8c07..b784784 100644
--- a/include/linux/binfmts.h
+++ b/include/linux/binfmts.h
@@ -70,6 +70,7 @@ struct linux_binfmt {
int (*core_dump)(long signr, struct pt_regs * regs, struct file * file);
unsigned long min_coredump; /* minimal dump size */
int hasvdso;
+ const char *name;
};
extern int register_binfmt(struct linux_binfmt *);
--
1.5.2.4
-
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