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| 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 /sysdeps/powerpc/ldsodefs.h | |
| 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 'sysdeps/powerpc/ldsodefs.h')
| -rw-r--r-- | sysdeps/powerpc/ldsodefs.h | 18 |
1 files changed, 16 insertions, 2 deletions
diff --git a/sysdeps/powerpc/ldsodefs.h b/sysdeps/powerpc/ldsodefs.h index ef849e961c..435821c246 100644 --- a/sysdeps/powerpc/ldsodefs.h +++ b/sysdeps/powerpc/ldsodefs.h @@ -25,6 +25,8 @@ struct La_ppc32_regs; struct La_ppc32_retval; struct La_ppc64_regs; struct La_ppc64_retval; +struct La_ppc64v2_regs; +struct La_ppc64v2_retval; #define ARCH_PLTENTER_MEMBERS \ Elf32_Addr (*ppc32_gnu_pltenter) (Elf32_Sym *, unsigned int, uintptr_t *, \ @@ -34,7 +36,12 @@ struct La_ppc64_retval; Elf64_Addr (*ppc64_gnu_pltenter) (Elf64_Sym *, unsigned int, uintptr_t *, \ uintptr_t *, struct La_ppc64_regs *, \ unsigned int *, const char *name, \ - long int *framesizep) + long int *framesizep); \ + Elf64_Addr (*ppc64v2_gnu_pltenter) (Elf64_Sym *, unsigned int, \ + uintptr_t *, uintptr_t *, \ + struct La_ppc64v2_regs *, \ + unsigned int *, const char *name, \ + long int *framesizep) #define ARCH_PLTEXIT_MEMBERS \ unsigned int (*ppc32_gnu_pltexit) (Elf32_Sym *, unsigned int, \ @@ -47,7 +54,14 @@ struct La_ppc64_retval; uintptr_t *, \ uintptr_t *, \ const struct La_ppc64_regs *, \ - struct La_ppc64_retval *, const char *) + struct La_ppc64_retval *, \ + const char *); \ + unsigned int (*ppc64v2_gnu_pltexit) (Elf64_Sym *, unsigned int, \ + uintptr_t *, \ + uintptr_t *, \ + const struct La_ppc64v2_regs *,\ + struct La_ppc64v2_retval *, \ + const char *) #include_next <ldsodefs.h> |