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Add support for DT_MIPS_RLD_MAP2 tag.

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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>
This commit is contained in:
Raghu Gandham 2014-12-18 19:12:19 -08:00
parent 65e6985617
commit 688157295f
2 changed files with 8 additions and 0 deletions
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1
libc/arch-mips/include/machine/elf_machdep.h
View File

@ -121,6 +121,7 @@
#define DT_MIPS_GOTSYM 0x70000013 /* first dynamic sym in got */ #define DT_MIPS_GOTSYM 0x70000013 /* first dynamic sym in got */
#define DT_MIPS_HIPAGENO 0x70000014 #define DT_MIPS_HIPAGENO 0x70000014
#define DT_MIPS_RLD_MAP 0x70000016 /* address of loader map */ #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 * ELF Flags

7
linker/linker.cpp
View File

@ -2402,6 +2402,13 @@ bool soinfo::prelink_image() {
*dp = &_r_debug; *dp = &_r_debug;
} }
break; 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_RLD_VERSION:
case DT_MIPS_FLAGS: case DT_MIPS_FLAGS: