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[PATCH] unwinder: move .eh_frame to RODATA

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The .eh_frame section contents is never written to, so it can as well
benefit from CONFIG_DEBUG_RODATA.

Diff-ed against firstfloor tree.

Signed-off-by: Jan Beulich <jbeulich@novell.com>
Signed-off-by: Andi Kleen <ak@suse.de>
This commit is contained in:
Jan Beulich 2006-12-07 02:14:19 +01:00 committed by Andi Kleen
parent c65f38d911
commit b65780e123
4 changed files with 13 additions and 24 deletions
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9
arch/i386/kernel/vmlinux.lds.S
View file

@ -102,15 +102,6 @@ SECTIONS
_edata = .; /* End of data section */
}
#ifdef CONFIG_STACK_UNWIND
. = ALIGN(4);
.eh_frame : AT(ADDR(.eh_frame) - LOAD_OFFSET) {
__start_unwind = .;
*(.eh_frame)
__end_unwind = .;
}
#endif
. = ALIGN(THREAD_SIZE); /* init_task */
.data.init_task : AT(ADDR(.data.init_task) - LOAD_OFFSET) {
*(.data.init_task)

9
arch/x86_64/kernel/vmlinux.lds.S
View file

@ -51,15 +51,6 @@ SECTIONS
RODATA
#ifdef CONFIG_STACK_UNWIND
. = ALIGN(8);
.eh_frame : AT(ADDR(.eh_frame) - LOAD_OFFSET) {
__start_unwind = .;
*(.eh_frame)
__end_unwind = .;
}
#endif
. = ALIGN(PAGE_SIZE); /* Align data segment to page size boundary */
/* Data */
.data : AT(ADDR(.data) - LOAD_OFFSET) {

17
include/asm-generic/vmlinux.lds.h
View file

@ -119,8 +119,7 @@
*(__ksymtab_strings) \
} \
\
/* Unwind data binary search table */ \
EH_FRAME_HDR \
EH_FRAME \
\
/* Built-in module parameters. */ \
__param : AT(ADDR(__param) - LOAD_OFFSET) { \
@ -162,15 +161,23 @@
VMLINUX_SYMBOL(__kprobes_text_end) = .;
#ifdef CONFIG_STACK_UNWIND
/* Unwind data binary search table */
#define EH_FRAME_HDR \
#define EH_FRAME \
/* Unwind data binary search table */ \
. = ALIGN(8); \
.eh_frame_hdr : AT(ADDR(.eh_frame_hdr) - LOAD_OFFSET) { \
VMLINUX_SYMBOL(__start_unwind_hdr) = .; \
*(.eh_frame_hdr) \
VMLINUX_SYMBOL(__end_unwind_hdr) = .; \
} \
/* Unwind data */ \
. = ALIGN(8); \
.eh_frame : AT(ADDR(.eh_frame) - LOAD_OFFSET) { \
VMLINUX_SYMBOL(__start_unwind) = .; \
*(.eh_frame) \
VMLINUX_SYMBOL(__end_unwind) = .; \
}
#else
#define EH_FRAME_HDR
#define EH_FRAME
#endif
/* DWARF debug sections.

2
kernel/unwind.c
View file

@ -19,7 +19,7 @@
#include <asm/uaccess.h>
#include <asm/unaligned.h>
extern char __start_unwind[], __end_unwind[];
extern const char __start_unwind[], __end_unwind[];
extern const u8 __start_unwind_hdr[], __end_unwind_hdr[];
#define MAX_STACK_DEPTH 8