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| author | Matthew Fortune <matthew.fortune@imgtec.com> | 2015-06-11 10:43:48 +0100 |
|---|---|---|
| committer | Matthew Fortune <matthew.fortune@imgtec.com> | 2015-06-26 12:03:45 +0100 |
| commit | a2057c984e4314c3740f04cf54e36c824e4c8f32 (patch) | |
| tree | 672f0235b7e453357caf0a2ae08ada10e5506f34 | |
| parent | a8e2112ae3e57fae592d84af2936a61d6239a248 (diff) | |
| download | glibc-a2057c984e4314c3740f04cf54e36c824e4c8f32.tar.gz glibc-a2057c984e4314c3740f04cf54e36c824e4c8f32.tar.xz glibc-a2057c984e4314c3740f04cf54e36c824e4c8f32.zip | |
Add support for DT_MIPS_RLD_MAP_REL.
This tag allows debugging of MIPS position independent executables and provides access to shared library information. * elf/elf.h (DT_MIPS_RLD_MAP_REL): New macro. (DT_MIPS_NUM): Update. * sysdeps/mips/dl-machine.h (ELF_MACHINE_DEBUG_SETUP): Handle DT_MIPS_RLD_MAP_REL.
| -rw-r--r-- | ChangeLog | 7 | ||||
| -rw-r--r-- | elf/elf.h | 6 | ||||
| -rw-r--r-- | sysdeps/mips/dl-machine.h | 13 |
3 files changed, 22 insertions, 4 deletions
diff --git a/ChangeLog b/ChangeLog index b61ea3cec9..b502c78f89 100644 --- a/ChangeLog +++ b/ChangeLog @@ -1,3 +1,10 @@ +2015-06-26 Matthew Fortune <matthew.fortune@imgtec.com> + + * elf/elf.h (DT_MIPS_RLD_MAP_REL): New macro. + (DT_MIPS_NUM): Update. + * sysdeps/mips/dl-machine.h (ELF_MACHINE_DEBUG_SETUP): Handle + DT_MIPS_RLD_MAP_REL. + 2015-06-25 Joseph Myers <joseph@codesourcery.com> [BZ #16559] diff --git a/elf/elf.h b/elf/elf.h index 12feb915bf..fbadda4377 100644 --- a/elf/elf.h +++ b/elf/elf.h @@ -1727,7 +1727,11 @@ typedef struct PLT is writable. For a non-writable PLT, this is omitted or has a zero value. */ #define DT_MIPS_RWPLT 0x70000034 -#define DT_MIPS_NUM 0x35 +/* An alternative description of the classic MIPS RLD_MAP that is usable + in a PIE as it stores a relative offset from the address of the tag + rather than an absolute address. */ +#define DT_MIPS_RLD_MAP_REL 0x70000035 +#define DT_MIPS_NUM 0x36 /* Legal values for DT_MIPS_FLAGS Elf32_Dyn entry. */ diff --git a/sysdeps/mips/dl-machine.h b/sysdeps/mips/dl-machine.h index d63238a4fe..8738564241 100644 --- a/sysdeps/mips/dl-machine.h +++ b/sysdeps/mips/dl-machine.h @@ -68,10 +68,17 @@ in l_info array. */ #define DT_MIPS(x) (DT_MIPS_##x - DT_LOPROC + DT_NUM) -/* If there is a DT_MIPS_RLD_MAP entry in the dynamic section, fill it in - with the run-time address of the r_debug structure */ +/* If there is a DT_MIPS_RLD_MAP_REL or DT_MIPS_RLD_MAP entry in the dynamic + section, fill in the debug map pointer with the run-time address of the + r_debug structure. */ #define ELF_MACHINE_DEBUG_SETUP(l,r) \ -do { if ((l)->l_info[DT_MIPS (RLD_MAP)]) \ +do { if ((l)->l_info[DT_MIPS (RLD_MAP_REL)]) \ + { \ + char *ptr = (char *)(l)->l_info[DT_MIPS (RLD_MAP_REL)]; \ + ptr += (l)->l_info[DT_MIPS (RLD_MAP_REL)]->d_un.d_val; \ + *(ElfW(Addr) *)ptr = (ElfW(Addr)) (r); \ + } \ + else if ((l)->l_info[DT_MIPS (RLD_MAP)]) \ *(ElfW(Addr) *)((l)->l_info[DT_MIPS (RLD_MAP)]->d_un.d_ptr) = \ (ElfW(Addr)) (r); \ } while (0) |