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Fix ld.so regression. 

[BZ #13967]
	* elf/dynamic-link.h (_ELF_DYNAMIC_DO_RELOC): Handle the case
	where the is a gap between DT_REL(A) and DT_JMPREL.
This commit is contained in:
David S. Miller 2012-04-10 12:57:48 -07:00
parent b46068fcf2
commit d7dd44133f
3 changed files with 15 additions and 7 deletions
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6
ChangeLog
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@ -1,3 +1,9 @@
2012-04-10 David S. Miller <davem@davemloft.net>
[BZ #13967]
* elf/dynamic-link.h (_ELF_DYNAMIC_DO_RELOC): Handle the case
where the is a gap between DT_REL(A) and DT_JMPREL.
2012-04-10 H.J. Lu <hongjiu.lu@intel.com>
* sysdeps/x86_64/bits/byteswap.h: Include <features.h>.

2
NEWS
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@ -21,7 +21,7 @@ Version 2.16
13824, 13840, 13841, 13844, 13846, 13851, 13852, 13854, 13871, 13872,
13873, 13879, 13883, 13892, 13895, 13908, 13910, 13911, 13912, 13913,
13915, 13916, 13917, 13918, 13919, 13920, 13921, 13926, 13928, 13938,
13963
13963, 13967
* ISO C11 support:

14
elf/dynamic-link.h
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@ -252,9 +252,10 @@ elf_get_dynamic_info (struct link_map *l, ElfW(Dyn) *temp)
/* On some machines, notably SPARC, DT_REL* includes DT_JMPREL in its
range. Note that according to the ELF spec, this is completely legal!
We are guarenteed that we have one of two situations. Either DT_JMPREL
We are guarenteed that we have one of three situations. Either DT_JMPREL
comes immediately after DT_REL*, or there is overlap and DT_JMPREL
consumes precisely the very end of the DT_REL*. */
consumes precisely the very end of the DT_REL*, or DT_JMPREL and DT_REL*
are completely separate and there is a gap between them. */
# define _ELF_DYNAMIC_DO_RELOC(RELOC, reloc, map, do_lazy, skip_ifunc, test_rel) \
do { \
@ -275,19 +276,20 @@ elf_get_dynamic_info (struct link_map *l, ElfW(Dyn) *temp)
&& (!test_rel || (map)->l_info[DT_PLTREL]->d_un.d_val == DT_##RELOC)) \
{ \
ElfW(Addr) start = D_PTR ((map), l_info[DT_JMPREL]); \
ElfW(Addr) size = (map)->l_info[DT_PLTRELSZ]->d_un.d_val; \
\
if (__builtin_expect (ranges[0].size, 1)) \
ranges[0].size = (start - ranges[0].start); \
if (ranges[0].start + ranges[0].size == (start + size)) \
ranges[0].size -= size; \
if (! ELF_DURING_STARTUP && ((do_lazy) || ranges[0].size == 0)) \
{ \
ranges[1].start = start; \
ranges[1].size = (map)->l_info[DT_PLTRELSZ]->d_un.d_val; \
ranges[1].size = size; \
ranges[1].lazy = (do_lazy); \
} \
else \
{ \
/* Combine processing the sections. */ \
ranges[0].size += (map)->l_info[DT_PLTRELSZ]->d_un.d_val; \
ranges[0].size += size; \
} \
} \
\