path: root/kernel/kallsyms.c
diff options
authorRobin Getz <rgetz@blackfin.uclinux.org>2008-02-06 01:36:26 -0800
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2008-02-06 10:41:01 -0800
commita3b81113fb6658629f4ebaabf8dd3067cd341020 (patch)
treec6823e84d410f18b110ce07726643d7dc841553d /kernel/kallsyms.c
parent0a5dcb51770be3cd0202d6b90a07996fb40130b6 (diff)
remove support for un-needed _extratext section
When passing a zero address to kallsyms_lookup(), the kernel thought it was a valid kernel address, even if it is not. This is because is_ksym_addr() called is_kernel_extratext() and checked against labels that don't exist on many archs (which default as zero). Since PPC was the only kernel which defines _extra_text, (in 2005), and no longer needs it, this patch removes _extra_text support. For some history (provided by Jon): http://ozlabs.org/pipermail/linuxppc-dev/2005-September/019734.html http://ozlabs.org/pipermail/linuxppc-dev/2005-September/019736.html http://ozlabs.org/pipermail/linuxppc-dev/2005-September/019751.html [akpm@linux-foundation.org: coding-style fixes] Signed-off-by: Robin Getz <rgetz@blackfin.uclinux.org> Cc: David Woodhouse <dwmw2@infradead.org> Cc: Jon Loeliger <jdl@freescale.com> Cc: Paul Mackerras <paulus@samba.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'kernel/kallsyms.c')
1 files changed, 1 insertions, 10 deletions
diff --git a/kernel/kallsyms.c b/kernel/kallsyms.c
index 7dadc71ce516..f091d13def00 100644
--- a/kernel/kallsyms.c
+++ b/kernel/kallsyms.c
@@ -53,14 +53,6 @@ static inline int is_kernel_inittext(unsigned long addr)
return 0;
-static inline int is_kernel_extratext(unsigned long addr)
- if (addr >= (unsigned long)_sextratext
- && addr <= (unsigned long)_eextratext)
- return 1;
- return 0;
static inline int is_kernel_text(unsigned long addr)
if (addr >= (unsigned long)_stext && addr <= (unsigned long)_etext)
@@ -80,8 +72,7 @@ static int is_ksym_addr(unsigned long addr)
if (all_var)
return is_kernel(addr);
- return is_kernel_text(addr) || is_kernel_inittext(addr) ||
- is_kernel_extratext(addr);
+ return is_kernel_text(addr) || is_kernel_inittext(addr);
/* expand a compressed symbol data into the resulting uncompressed string,

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