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33 lines
1.3 KiB
33 lines
1.3 KiB
https://bugs.gentoo.org/503838
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http://gcc.gnu.org/PR60465
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https://sourceware.org/ml/libc-alpha/2015-12/msg00556.html
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https://trofi.github.io/posts/189-glibc-on-ia64-or-how-relocations-bootstrap.html
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newer versions of gcc generate relocations in the elf_get_dynamic_info func
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which glibc relies on to populate some info structs. those structs are then
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used by ldso to process relocations in itself. glibc requires that there are
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no relocations until that point (*after* elf_get_dynamic_info), so we end up
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crashing during elf_get_dynamic_info because the relocation has not yet been
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processed.
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this hack shuffles the code in a way that tricks gcc into not generating the
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relocation. we need to figure out something better for upstream.
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--- a/elf/get-dynamic-info.h
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+++ b/elf/get-dynamic-info.h
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@@ -66,8 +66,12 @@ elf_get_dynamic_info (struct link_map *l, ElfW(Dyn) *temp)
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info[DT_VALTAGIDX (dyn->d_tag) + DT_NUM + DT_THISPROCNUM
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+ DT_VERSIONTAGNUM + DT_EXTRANUM] = dyn;
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else if ((d_tag_utype) DT_ADDRTAGIDX (dyn->d_tag) < DT_ADDRNUM)
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- info[DT_ADDRTAGIDX (dyn->d_tag) + DT_NUM + DT_THISPROCNUM
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- + DT_VERSIONTAGNUM + DT_EXTRANUM + DT_VALNUM] = dyn;
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+ {
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+ d_tag_utype i =
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+ DT_ADDRTAGIDX (dyn->d_tag) + DT_NUM + DT_THISPROCNUM
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+ + DT_VERSIONTAGNUM + DT_EXTRANUM + DT_VALNUM;
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+ info[i] = dyn;
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+ }
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++dyn;
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}
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