Add support for DT_MIPS_RLD_MAP2 tag.
Position Independent Executables cannot communicate with GDB using DT_MIPS_RLD_TAG.
Hence a new tag DT_MIPS_RLD_MAP2 got introduced to fix the issue.
Change-Id: I77ce3faf1ef2e121003b804ecd291abb25cfbb56
Signed-off-by: Nikola Veljkovic<Nikola.Veljkovic@imgtec.com>
diff --git a/libc/arch-mips/include/machine/elf_machdep.h b/libc/arch-mips/include/machine/elf_machdep.h
index d27d431..0aacedf 100644
--- a/libc/arch-mips/include/machine/elf_machdep.h
+++ b/libc/arch-mips/include/machine/elf_machdep.h
@@ -121,6 +121,7 @@
#define DT_MIPS_GOTSYM 0x70000013 /* first dynamic sym in got */
#define DT_MIPS_HIPAGENO 0x70000014
#define DT_MIPS_RLD_MAP 0x70000016 /* address of loader map */
+#define DT_MIPS_RLD_MAP2 0x70000035 /* offset of loader map, used for PIE */
/*
* ELF Flags
diff --git a/linker/linker.cpp b/linker/linker.cpp
index 3409931..babefeb 100644
--- a/linker/linker.cpp
+++ b/linker/linker.cpp
@@ -2402,6 +2402,13 @@
*dp = &_r_debug;
}
break;
+ case DT_MIPS_RLD_MAP2:
+ // Set the DT_MIPS_RLD_MAP2 entry to the address of _r_debug for GDB.
+ {
+ r_debug** dp = reinterpret_cast<r_debug**>(reinterpret_cast<ElfW(Addr)>(d) + d->d_un.d_val);
+ *dp = &_r_debug;
+ }
+ break;
case DT_MIPS_RLD_VERSION:
case DT_MIPS_FLAGS: