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| author | Alan Modra <amodra@gmail.com> | 2013-12-04 06:44:06 -0600 |
|---|---|---|
| committer | Adhemerval Zanella <azanella@linux.vnet.ibm.com> | 2013-12-04 07:41:37 -0600 |
| commit | 7ec07d9a7b501f1b7d740fda02ba5f39d6d684e5 (patch) | |
| tree | 8af2d6588a7c4d7eea36a213f44f3b5823b63f78 /ChangeLog | |
| parent | 5162e7dd96efcd9b45c1dc1471a964d45278b1e1 (diff) | |
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PowerPC64: Report overflow on @h and @ha relocations
This patch updates glibc in accordance with the binutils patch checked in here:
https://sourceware.org/ml/binutils/2013-10/msg00372.html
This changes the various R_PPC64_..._HI and _HA relocations to report
32-bit overflows. The motivation is that existing uses of @h / @ha
are to build up 32-bit offsets (for the "medium model" TOC access
that GCC now defaults to), and we'd really like to see failures at
link / load time rather than silent truncations.
For those rare cases where a modifier is needed to build up a 64-bit
constant, new relocations _HIGH / _HIGHA are supported.
The patch also fixes a bug in overflow checking for the R_PPC64_ADDR30
and R_PPC64_ADDR32 relocations.
Diffstat (limited to 'ChangeLog')
| -rw-r--r-- | ChangeLog | 14 |
1 files changed, 14 insertions, 0 deletions
@@ -1,3 +1,17 @@ +2013-12-04 Alan Modra <amodra@gmail.com> + + * elf/elf.h (R_PPC64_TLSGD, R_PPC64_TLSLD, R_PPC64_TOCSAVE): Define. + (R_PPC64_ADDR16_HIGH, R_PPC64_ADDR16_HIGHA): Likewise. + (R_PPC64_TPREL16_HIGH, R_PPC64_TPREL16_HIGHA): Likewise. + (R_PPC64_DTPREL16_HIGH, R_PPC64_DTPREL16_HIGHA): Likewise. + + * sysdeps/powerpc/powerpc64/dl-machine.h (elf_machine_rela): Add + overflow checking for R_PPC64_ADDR16_HI, R_PPC64_ADDR16_HA, + R_PPC64_TPREL16_HI, and R_PPC64_TPREL16_HA. + Support new R_PPC64_ADDR16_HIGH, R_PPC64_ADDR16_HIGHA, + R_PPC64_TPREL16_HIGH, and R_PPC64_TPREL16_HIGHA relocations. + Fix overflow checking for R_PPC64_ADDR30 and R_PPC64_ADDR32. + 2013-12-04 Ulrich Weigand <Ulrich.Weigand@de.ibm.com> * sysdeps/unix/sysv/linux/powerpc/powerpc64/makecontext.S |