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authorAlan Modra <amodra@gmail.com>2013-12-04 06:44:06 -0600
committerAdhemerval Zanella <azanella@linux.vnet.ibm.com>2013-12-04 07:41:37 -0600
commit7ec07d9a7b501f1b7d740fda02ba5f39d6d684e5 (patch)
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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.
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+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