2016-08-26 15:19:37 +00:00
|
|
|
Adding support for the R_X86_64_REX_GOTPCRELX relocation type.
|
|
|
|
|
This relocation is treated by the linker the same as the R_X86_64_GOTPCRELX type
|
|
|
|
|
G + GOT + A - P to generate relative offsets to the GOT.
|
|
|
|
|
The REX prefix has no influence in this stage.
|
|
|
|
|
|
|
|
|
|
This caused breakage when enabling relro/bindnow hardening e.g. in ghcPaclages.vector
|
|
|
|
|
|
|
|
|
|
Source: https://phabricator.haskell.org/D2303#67070
|
2016-08-26 14:56:03 +00:00
|
|
|
diff --git a/rts/Linker.c b/rts/Linker.c
|
|
|
|
|
--- a/rts/Linker.c
|
|
|
|
|
+++ b/rts/Linker.c
|
|
|
|
|
@@ -5681,7 +5681,13 @@
|
|
|
|
|
*(Elf64_Sword *)P = (Elf64_Sword)value;
|
|
|
|
|
#endif
|
|
|
|
|
break;
|
|
|
|
|
-
|
|
|
|
|
+/* These two relocations were introduced in glibc 2.23 and binutils 2.26.
|
|
|
|
|
+ But in order to use them the system which compiles the bindist for GHC needs
|
|
|
|
|
+ to have glibc >= 2.23. So only use them if they're defined. */
|
|
|
|
|
+#if defined(R_X86_64_REX_GOTPCRELX) && defined(R_X86_64_GOTPCRELX)
|
|
|
|
|
+ case R_X86_64_REX_GOTPCRELX:
|
|
|
|
|
+ case R_X86_64_GOTPCRELX:
|
|
|
|
|
+#endif
|
|
|
|
|
case R_X86_64_GOTPCREL:
|
|
|
|
|
{
|
|
|
|
|
StgInt64 gotAddress = (StgInt64) &makeSymbolExtra(oc, ELF_R_SYM(info), S)->addr;
|
|
|
|
|
|
