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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 | |
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> |