diff options
| author | Ulrich Weigand <Ulrich.Weigand@de.ibm.com> | 2013-12-04 06:59:37 -0600 |
|---|---|---|
| committer | Adhemerval Zanella <azanella@linux.vnet.ibm.com> | 2013-12-04 07:41:39 -0600 |
| commit | 61cd8fe4017c251617dd300818917e61a12ab48e (patch) | |
| tree | dfac7e867271b7a5889db22693883cd54b41e9ac /ChangeLog | |
| parent | 8b8a692cfd7d80f1ee7c8b9ab356a259367dd187 (diff) | |
| download | glibc-61cd8fe4017c251617dd300818917e61a12ab48e.tar.gz glibc-61cd8fe4017c251617dd300818917e61a12ab48e.tar.xz glibc-61cd8fe4017c251617dd300818917e61a12ab48e.zip | |
PowerPC64 ELFv2 ABI 5/6: LD_AUDIT interface changes
The ELFv2 ABI changes the calling convention by passing and returning structures in registers in more cases than the old ABI: http://gcc.gnu.org/ml/gcc-patches/2013-11/msg01145.html http://gcc.gnu.org/ml/gcc-patches/2013-11/msg01147.html For the most part, this does not affect glibc, since glibc assembler files do not use structure parameters / return values. However, one place is affected: the LD_AUDIT interface provides a structure to the audit routine that contains all registers holding function argument and return values for the intercepted PLT call. Since the new ABI now sometimes uses registers to return values that were never used for this purpose in the old ABI, this structure has to be extended. To force audit routines to be modified for the new ABI if necessary, the patch defines v2 variants of the la_ppc64 types and routines. In addition, the patch contains two unrelated changes to the PLT trampoline routines: it fixes a bug where FPR return values were stored in the wrong place, and it removes the unnecessary save/restore of CR.
Diffstat (limited to 'ChangeLog')
| -rw-r--r-- | ChangeLog | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/ChangeLog b/ChangeLog index 0be780a3c6..a0d32f24fe 100644 --- a/ChangeLog +++ b/ChangeLog @@ -1,3 +1,26 @@ +2013-11-12 Ulrich Weigand <Ulrich.Weigand@de.ibm.com> + Alan Modra <amodra@gmail.com> + + * sysdeps/powerpc/bits/link.h (La_ppc64v2_regs, La_ppc64v2_retval): + New versions for use with the ELFv2 ABI. + (la_ppc64v2_gnu_pltenter, la_ppc64v2_gnu_pltexit): Add prototypes. + * sysdeps/powerpc/lsdodefs.h (struct La_ppc64v2_regs): Add forward + declaration. + (struct La_ppc64v2_retval): Likewise. + (ARCH_PLTENTER_MEMBERS): Add ppc64v2_gnu_pltenter. + (ARCH_PLTEXIT_MEMBERS): Add ppc64v2_gnu_pltexit. + * sysdeps/powerpc/powerpc64/dl-machine.h (ARCH_LA_PLTENTER): Define + to ppc64v2_gnu_pltenter if _CALL_ELF == 2. + (ARCH_LA_PLTEXIT): Define to ppc64v2_gnu_pltexit if _CALL_ELF == 2. + * sysdeps/powerpc/powerpc64/dl-trampoline.S (_dl_runtime_resolve): + Do not save or restore CR. + (FRAME_SIZE, VR_RTN): Provide updated values for _CALL_ELF == 2. + (_dl_profile_resolve): Do no save or restore CR. Support extended + return values for ELFv2 ABI. Fix location of FPR return registers. + * sysdeps/powerpc/powerpc64/tst-audit.h (pltenter, pltexit): Provide + updated values for _CALL_ELF == 2. + (La_regs, La_retval, int_retval): Likewise. + 2013-12-04 Ulrich Weigand <Ulrich.Weigand@de.ibm.com> * sysdeps/powerpc/powerpc64/sysdep.h (FRAME_MIN_SIZE): Define. |