# commit 7ec07d9a7b501f1b7d740fda02ba5f39d6d684e5
# Author: Alan Modra <amodra@gmail.com>
# Date:   Wed Dec 4 06:44:06 2013 -0600
# 
#     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.
# 
---
# elf/elf.h                              |   11 +++++++++++
# sysdeps/powerpc/powerpc64/dl-machine.h |   24 ++++++++++++++++++++++--
# 2 files changed, 33 insertions(+), 2 deletions(-)
#
--- a/elf/elf.h
+++ b/elf/elf.h
@@ -2240,6 +2240,17 @@
 #define R_PPC64_DTPREL16_HIGHERA 104 /* half16	(sym+add)@dtprel@highera */
 #define R_PPC64_DTPREL16_HIGHEST 105 /* half16	(sym+add)@dtprel@highest */
 #define R_PPC64_DTPREL16_HIGHESTA 106 /* half16	(sym+add)@dtprel@highesta */
+#define R_PPC64_TLSGD		107 /* none	(sym+add)@tlsgd */
+#define R_PPC64_TLSLD		108 /* none	(sym+add)@tlsld */
+#define R_PPC64_TOCSAVE		109 /* none */
+
+/* Added when HA and HI relocs were changed to report overflows.  */
+#define R_PPC64_ADDR16_HIGH	110
+#define R_PPC64_ADDR16_HIGHA	111
+#define R_PPC64_TPREL16_HIGH	112
+#define R_PPC64_TPREL16_HIGHA	113
+#define R_PPC64_DTPREL16_HIGH	114
+#define R_PPC64_DTPREL16_HIGHA	115
 
 /* GNU extension to support local ifunc.  */
 #define R_PPC64_JMP_IREL	247
--- a/sysdeps/powerpc/powerpc64/dl-machine.h
+++ b/sysdeps/powerpc/powerpc64/dl-machine.h
@@ -663,11 +663,25 @@
 
     case R_PPC64_TPREL16_HI:
       value = elf_machine_tprel (map, sym_map, sym, reloc);
+      if (dont_expect (value + 0x80000000 >= 0x100000000LL))
+	_dl_reloc_overflow (map, "R_PPC64_TPREL16_HI", reloc_addr, refsym);
+      *(Elf64_Half *) reloc_addr = PPC_HI (value);
+      break;
+
+    case R_PPC64_TPREL16_HIGH:
+      value = elf_machine_tprel (map, sym_map, sym, reloc);
       *(Elf64_Half *) reloc_addr = PPC_HI (value);
       break;
 
     case R_PPC64_TPREL16_HA:
       value = elf_machine_tprel (map, sym_map, sym, reloc);
+      if (dont_expect (value + 0x80008000 >= 0x100000000LL))
+	_dl_reloc_overflow (map, "R_PPC64_TPREL16_HA", reloc_addr, refsym);
+      *(Elf64_Half *) reloc_addr = PPC_HA (value);
+      break;
+
+    case R_PPC64_TPREL16_HIGHA:
+      value = elf_machine_tprel (map, sym_map, sym, reloc);
       *(Elf64_Half *) reloc_addr = PPC_HA (value);
       break;
 
@@ -703,17 +717,23 @@
       break;
 
     case R_PPC64_ADDR16_HI:
+      if (dont_expect (value + 0x80000000 >= 0x100000000LL))
+	_dl_reloc_overflow (map, "R_PPC64_ADDR16_HI", reloc_addr, refsym);
+    case R_PPC64_ADDR16_HIGH:
       *(Elf64_Half *) reloc_addr = PPC_HI (value);
       break;
 
     case R_PPC64_ADDR16_HA:
+      if (dont_expect (value + 0x80008000 >= 0x100000000LL))
+	_dl_reloc_overflow (map, "R_PPC64_ADDR16_HA", reloc_addr, refsym);
+    case R_PPC64_ADDR16_HIGHA:
       *(Elf64_Half *) reloc_addr = PPC_HA (value);
       break;
 
     case R_PPC64_ADDR30:
       {
 	Elf64_Addr delta = value - (Elf64_Xword) reloc_addr;
-	if (dont_expect ((delta + 0x80000000) >= 0x10000000
+	if (dont_expect ((delta + 0x80000000) >= 0x100000000LL
 			 || (delta & 3) != 0))
 	  _dl_reloc_overflow (map, "R_PPC64_ADDR30", reloc_addr, refsym);
 	BIT_INSERT (*(Elf64_Word *) reloc_addr, delta, 0xfffffffc);
@@ -762,7 +782,7 @@
       return;
 
     case R_PPC64_ADDR32:
-      if (dont_expect ((value + 0x80000000) >= 0x10000000))
+      if (dont_expect ((value + 0x80000000) >= 0x100000000LL))
 	_dl_reloc_overflow (map, "R_PPC64_ADDR32", reloc_addr, refsym);
       *(Elf64_Word *) reloc_addr = value;
       return;
