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# commit 61cd8fe4017c251617dd300818917e61a12ab48e
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# Author: Ulrich Weigand <Ulrich.Weigand@de.ibm.com>
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# Date: Wed Dec 4 06:59:37 2013 -0600
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#
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# PowerPC64 ELFv2 ABI 5/6: LD_AUDIT interface changes
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#
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# The ELFv2 ABI changes the calling convention by passing and returning
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# structures in registers in more cases than the old ABI:
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# http://gcc.gnu.org/ml/gcc-patches/2013-11/msg01145.html
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# http://gcc.gnu.org/ml/gcc-patches/2013-11/msg01147.html
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#
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# For the most part, this does not affect glibc, since glibc assembler
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# files do not use structure parameters / return values. However, one
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# place is affected: the LD_AUDIT interface provides a structure to
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# the audit routine that contains all registers holding function
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# argument and return values for the intercepted PLT call.
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#
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# Since the new ABI now sometimes uses registers to return values
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# that were never used for this purpose in the old ABI, this structure
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# has to be extended. To force audit routines to be modified for the
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# new ABI if necessary, the patch defines v2 variants of the la_ppc64
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# types and routines.
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#
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# In addition, the patch contains two unrelated changes to the
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# PLT trampoline routines: it fixes a bug where FPR return values
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# were stored in the wrong place, and it removes the unnecessary
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# save/restore of CR.
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#
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diff -urN glibc-2.17-c758a686/sysdeps/powerpc/bits/link.h glibc-2.17-c758a686/sysdeps/powerpc/bits/link.h
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--- glibc-2.17-c758a686/sysdeps/powerpc/bits/link.h 2014-05-29 14:11:12.000000000 -0500
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+++ glibc-2.17-c758a686/sysdeps/powerpc/bits/link.h 2014-05-29 14:11:20.000000000 -0500
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@@ -63,7 +63,7 @@
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__END_DECLS
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-#else
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+#elif _CALL_ELF != 2
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/* Registers for entry into PLT on PPC64. */
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typedef struct La_ppc64_regs
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@@ -107,4 +107,48 @@
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__END_DECLS
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+#else
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+
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+/* Registers for entry into PLT on PPC64 in the ELFv2 ABI. */
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+typedef struct La_ppc64v2_regs
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+{
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+ uint64_t lr_reg[8];
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+ double lr_fp[13];
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+ uint32_t __padding;
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+ uint32_t lr_vrsave;
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+ uint32_t lr_vreg[12][4] __attribute__ ((aligned (16)));
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+ uint64_t lr_r1;
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+ uint64_t lr_lr;
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+} La_ppc64v2_regs;
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+
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+/* Return values for calls from PLT on PPC64 in the ELFv2 ABI. */
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+typedef struct La_ppc64v2_retval
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+{
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+ uint64_t lrv_r3;
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+ uint64_t lrv_r4;
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+ double lrv_fp[10];
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+ uint32_t lrv_vreg[8][4] __attribute__ ((aligned (16)));
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+} La_ppc64v2_retval;
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+
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+
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+__BEGIN_DECLS
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+
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+extern Elf64_Addr la_ppc64v2_gnu_pltenter (Elf64_Sym *__sym,
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+ unsigned int __ndx,
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+ uintptr_t *__refcook,
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+ uintptr_t *__defcook,
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+ La_ppc64v2_regs *__regs,
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+ unsigned int *__flags,
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+ const char *__symname,
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+ long int *__framesizep);
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+extern unsigned int la_ppc64v2_gnu_pltexit (Elf64_Sym *__sym,
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+ unsigned int __ndx,
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+ uintptr_t *__refcook,
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+ uintptr_t *__defcook,
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+ const La_ppc64v2_regs *__inregs,
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+ La_ppc64v2_retval *__outregs,
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+ const char *__symname);
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+
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+__END_DECLS
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+
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#endif
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diff -urN glibc-2.17-c758a686/sysdeps/powerpc/ldsodefs.h glibc-2.17-c758a686/sysdeps/powerpc/ldsodefs.h
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--- glibc-2.17-c758a686/sysdeps/powerpc/ldsodefs.h 2014-05-29 14:11:12.000000000 -0500
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+++ glibc-2.17-c758a686/sysdeps/powerpc/ldsodefs.h 2014-05-29 14:11:20.000000000 -0500
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@@ -25,6 +25,8 @@
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struct La_ppc32_retval;
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struct La_ppc64_regs;
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struct La_ppc64_retval;
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+struct La_ppc64v2_regs;
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+struct La_ppc64v2_retval;
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#define ARCH_PLTENTER_MEMBERS \
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Elf32_Addr (*ppc32_gnu_pltenter) (Elf32_Sym *, unsigned int, uintptr_t *, \
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@@ -34,7 +36,12 @@
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Elf64_Addr (*ppc64_gnu_pltenter) (Elf64_Sym *, unsigned int, uintptr_t *, \
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uintptr_t *, struct La_ppc64_regs *, \
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unsigned int *, const char *name, \
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- long int *framesizep)
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+ long int *framesizep); \
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+ Elf64_Addr (*ppc64v2_gnu_pltenter) (Elf64_Sym *, unsigned int, \
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+ uintptr_t *, uintptr_t *, \
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+ struct La_ppc64v2_regs *, \
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+ unsigned int *, const char *name, \
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+ long int *framesizep)
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#define ARCH_PLTEXIT_MEMBERS \
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unsigned int (*ppc32_gnu_pltexit) (Elf32_Sym *, unsigned int, \
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@@ -47,7 +54,14 @@
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uintptr_t *, \
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uintptr_t *, \
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const struct La_ppc64_regs *, \
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- struct La_ppc64_retval *, const char *)
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+ struct La_ppc64_retval *, \
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+ const char *); \
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+ unsigned int (*ppc64v2_gnu_pltexit) (Elf64_Sym *, unsigned int, \
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+ uintptr_t *, \
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+ uintptr_t *, \
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+ const struct La_ppc64v2_regs *,\
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+ struct La_ppc64v2_retval *, \
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+ const char *)
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#include_next <ldsodefs.h>
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diff -urN glibc-2.17-c758a686/sysdeps/powerpc/powerpc64/dl-machine.h glibc-2.17-c758a686/sysdeps/powerpc/powerpc64/dl-machine.h
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--- glibc-2.17-c758a686/sysdeps/powerpc/powerpc64/dl-machine.h 2014-05-29 14:11:12.000000000 -0500
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+++ glibc-2.17-c758a686/sysdeps/powerpc/powerpc64/dl-machine.h 2014-05-29 14:11:20.000000000 -0500
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@@ -546,8 +546,13 @@
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/* Names of the architecture-specific auditing callback functions. */
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+#if _CALL_ELF != 2
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#define ARCH_LA_PLTENTER ppc64_gnu_pltenter
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#define ARCH_LA_PLTEXIT ppc64_gnu_pltexit
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+#else
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+#define ARCH_LA_PLTENTER ppc64v2_gnu_pltenter
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+#define ARCH_LA_PLTEXIT ppc64v2_gnu_pltexit
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+#endif
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#endif /* dl_machine_h */
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diff -urN glibc-2.17-c758a686/sysdeps/powerpc/powerpc64/dl-trampoline.S glibc-2.17-c758a686/sysdeps/powerpc/powerpc64/dl-trampoline.S
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--- glibc-2.17-c758a686/sysdeps/powerpc/powerpc64/dl-trampoline.S 2014-05-29 14:11:12.000000000 -0500
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+++ glibc-2.17-c758a686/sysdeps/powerpc/powerpc64/dl-trampoline.S 2014-05-29 14:11:20.000000000 -0500
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@@ -50,11 +50,8 @@
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/* Store the LR in the LR Save area. */
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std r0,FRAME_SIZE+FRAME_LR_SAVE(r1)
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cfi_offset (lr, FRAME_LR_SAVE)
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- mfcr r0
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std r9,INT_PARMS+48(r1)
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std r10,INT_PARMS+56(r1)
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-/* I'm almost certain we don't have to save cr... be safe. */
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- std r0,FRAME_SIZE+FRAME_CR_SAVE(r1)
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bl JUMPTARGET(_dl_fixup)
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#ifndef SHARED
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nop
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@@ -66,11 +63,9 @@
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ld r8,INT_PARMS+40(r1)
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ld r7,INT_PARMS+32(r1)
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mtlr r0
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- ld r0,FRAME_SIZE+FRAME_CR_SAVE(r1)
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ld r6,INT_PARMS+24(r1)
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ld r5,INT_PARMS+16(r1)
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ld r4,INT_PARMS+8(r1)
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- mtcrf 0xFF,r0
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/* Prepare for calling the function returned by fixup. */
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PPC64_LOAD_FUNCPTR r3
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ld r3,INT_PARMS+0(r1)
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@@ -85,18 +80,30 @@
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#undef FRAME_SIZE
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#undef INT_PARMS
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- /* Stack layout:
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- (Note: some of these are not required for the ELFv2 ABI.)
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- +592 previous backchain
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- +584 spill_r31
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- +576 spill_r30
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- +560 v1
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- +552 fp4
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- +544 fp3
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- +536 fp2
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- +528 fp1
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- +520 r4
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- +512 r3
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+ /* Stack layout: ELFv2 ABI.
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+ +752 previous backchain
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+ +744 spill_r31
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+ +736 spill_r30
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+ +720 v8
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+ +704 v7
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+ +688 v6
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+ +672 v5
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+ +656 v4
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+ +640 v3
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+ +624 v2
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+ +608 v1
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+ +600 fp10
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+ ELFv1 ABI +592 fp9
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+ +592 previous backchain +584 fp8
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+ +584 spill_r31 +576 fp7
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+ +576 spill_r30 +568 fp6
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+ +560 v1 +560 fp5
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+ +552 fp4 +552 fp4
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+ +544 fp3 +544 fp3
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+ +536 fp2 +536 fp2
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+ +528 fp1 +528 fp1
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+ +520 r4 +520 r4
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+ +512 r3 +512 r3
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return values
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+504 free
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+496 stackframe
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@@ -157,10 +164,15 @@
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+8 CR save area
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r1+0 stack back chain
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*/
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-#define FRAME_SIZE 592
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+#if _CALL_ELF == 2
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+# define FRAME_SIZE 752
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+# define VR_RTN 608
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+#else
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+# define FRAME_SIZE 592
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+# define VR_RTN 560
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+#endif
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#define INT_RTN 512
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#define FPR_RTN 528
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-#define VR_RTN 560
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#define STACK_FRAME 496
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#define CALLING_LR 488
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#define CALLING_SP 480
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@@ -205,18 +217,14 @@
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mflr r5
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std r7,INT_PARMS+32(r1)
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std r8,INT_PARMS+40(r1)
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-/* Store the LR in the LR Save area of the previous frame. */
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-/* XXX Do we have to do this? */
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+/* Store the LR in the LR Save area. */
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la r8,FRAME_SIZE(r1)
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std r5,FRAME_SIZE+FRAME_LR_SAVE(r1)
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cfi_offset (lr, FRAME_LR_SAVE)
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std r5,CALLING_LR(r1)
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- mfcr r0
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std r9,INT_PARMS+48(r1)
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std r10,INT_PARMS+56(r1)
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std r8,CALLING_SP(r1)
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-/* I'm almost certain we don't have to save cr... be safe. */
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- std r0,FRAME_SIZE+FRAME_CR_SAVE(r1)
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ld r12,.LC__dl_hwcap@toc(r2)
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#ifdef SHARED
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/* Load _rtld_local_ro._dl_hwcap. */
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@@ -319,11 +327,9 @@
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ld r8,INT_PARMS+40(r1)
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ld r7,INT_PARMS+32(r1)
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mtlr r0
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- ld r0,FRAME_SIZE+FRAME_CR_SAVE(r1)
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ld r6,INT_PARMS+24(r1)
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ld r5,INT_PARMS+16(r1)
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ld r4,INT_PARMS+8(r1)
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- mtcrf 0xFF,r0
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/* Prepare for calling the function returned by fixup. */
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PPC64_LOAD_FUNCPTR r3
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ld r3,INT_PARMS+0(r1)
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@@ -346,10 +352,11 @@
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lfd fp12,FPR_PARMS+88(r1)
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lfd fp13,FPR_PARMS+96(r1)
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/* Unwind the stack frame, and jump. */
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- ld r31,584(r1)
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- ld r30,576(r1)
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+ ld r31,FRAME_SIZE-8(r1)
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+ ld r30,FRAME_SIZE-16(r1)
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addi r1,r1,FRAME_SIZE
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bctr
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+
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L(do_pltexit):
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la r10,(VR_PARMS+0)(r1)
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la r9,(VR_PARMS+16)(r1)
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@@ -383,11 +390,9 @@
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ld r8,INT_PARMS+40(r1)
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ld r7,INT_PARMS+32(r1)
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mtlr r0
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147e83 |
- ld r0,FRAME_SIZE+FRAME_CR_SAVE(r1)
|
|
|
147e83 |
ld r6,INT_PARMS+24(r1)
|
|
|
147e83 |
ld r5,INT_PARMS+16(r1)
|
|
|
147e83 |
ld r4,INT_PARMS+8(r1)
|
|
|
147e83 |
- mtcrf 0xFF,r0
|
|
|
147e83 |
/* Prepare for calling the function returned by fixup. */
|
|
|
147e83 |
std r2,FRAME_TOC_SAVE(r1)
|
|
|
147e83 |
PPC64_LOAD_FUNCPTR r3
|
|
|
147e83 |
@@ -413,16 +418,37 @@
|
|
|
147e83 |
/* But return here and store the return values. */
|
|
|
147e83 |
std r3,INT_RTN(r1)
|
|
|
147e83 |
std r4,INT_RTN+8(r1)
|
|
|
147e83 |
- stfd fp1,FPR_PARMS+0(r1)
|
|
|
147e83 |
- stfd fp2,FPR_PARMS+8(r1)
|
|
|
147e83 |
+ stfd fp1,FPR_RTN+0(r1)
|
|
|
147e83 |
+ stfd fp2,FPR_RTN+8(r1)
|
|
|
147e83 |
cmpdi cr0,r12,0
|
|
|
147e83 |
la r10,VR_RTN(r1)
|
|
|
147e83 |
- stfd fp3,FPR_PARMS+16(r1)
|
|
|
147e83 |
- stfd fp4,FPR_PARMS+24(r1)
|
|
|
147e83 |
+ stfd fp3,FPR_RTN+16(r1)
|
|
|
147e83 |
+ stfd fp4,FPR_RTN+24(r1)
|
|
|
147e83 |
+#if _CALL_ELF == 2
|
|
|
147e83 |
+ la r12,VR_RTN+16(r1)
|
|
|
147e83 |
+ stfd fp5,FPR_RTN+32(r1)
|
|
|
147e83 |
+ stfd fp6,FPR_RTN+40(r1)
|
|
|
147e83 |
+ li r5,32
|
|
|
147e83 |
+ li r6,64
|
|
|
147e83 |
+ stfd fp7,FPR_RTN+48(r1)
|
|
|
147e83 |
+ stfd fp8,FPR_RTN+56(r1)
|
|
|
147e83 |
+ stfd fp9,FPR_RTN+64(r1)
|
|
|
147e83 |
+ stfd fp10,FPR_RTN+72(r1)
|
|
|
147e83 |
+#endif
|
|
|
147e83 |
mr r3,r31
|
|
|
147e83 |
mr r4,r30
|
|
|
147e83 |
beq L(callpltexit)
|
|
|
147e83 |
stvx v2,0,r10
|
|
|
147e83 |
+#if _CALL_ELF == 2
|
|
|
147e83 |
+ stvx v3,0,r12
|
|
|
147e83 |
+ stvx v4,r5,r10
|
|
|
147e83 |
+ stvx v5,r5,r12
|
|
|
147e83 |
+ addi r5,r5,64
|
|
|
147e83 |
+ stvx v6,r6,r10
|
|
|
147e83 |
+ stvx v7,r6,r12
|
|
|
147e83 |
+ stvx v8,r5,r10
|
|
|
147e83 |
+ stvx v9,r5,r12
|
|
|
147e83 |
+#endif
|
|
|
147e83 |
L(callpltexit):
|
|
|
147e83 |
addi r5,r1,INT_PARMS
|
|
|
147e83 |
addi r6,r1,INT_RTN
|
|
|
147e83 |
@@ -434,18 +460,39 @@
|
|
|
147e83 |
lwz r12,VR_VRSAVE(r1)
|
|
|
147e83 |
ld r3,INT_RTN(r1)
|
|
|
147e83 |
ld r4,INT_RTN+8(r1)
|
|
|
147e83 |
- lfd fp1,FPR_PARMS+0(r1)
|
|
|
147e83 |
- lfd fp2,FPR_PARMS+8(r1)
|
|
|
147e83 |
+ lfd fp1,FPR_RTN+0(r1)
|
|
|
147e83 |
+ lfd fp2,FPR_RTN+8(r1)
|
|
|
147e83 |
cmpdi cr0,r12,0
|
|
|
147e83 |
- la r10,VR_RTN(r1)
|
|
|
147e83 |
- lfd fp3,FPR_PARMS+16(r1)
|
|
|
147e83 |
- lfd fp4,FPR_PARMS+24(r1)
|
|
|
147e83 |
+ la r11,VR_RTN(r1)
|
|
|
147e83 |
+ lfd fp3,FPR_RTN+16(r1)
|
|
|
147e83 |
+ lfd fp4,FPR_RTN+24(r1)
|
|
|
147e83 |
+#if _CALL_ELF == 2
|
|
|
147e83 |
+ la r12,VR_RTN+16(r1)
|
|
|
147e83 |
+ lfd fp5,FPR_RTN+32(r1)
|
|
|
147e83 |
+ lfd fp6,FPR_RTN+40(r1)
|
|
|
147e83 |
+ li r30,32
|
|
|
147e83 |
+ li r31,64
|
|
|
147e83 |
+ lfd fp7,FPR_RTN+48(r1)
|
|
|
147e83 |
+ lfd fp8,FPR_RTN+56(r1)
|
|
|
147e83 |
+ lfd fp9,FPR_RTN+64(r1)
|
|
|
147e83 |
+ lfd fp10,FPR_RTN+72(r1)
|
|
|
147e83 |
+#endif
|
|
|
147e83 |
beq L(pltexitreturn)
|
|
|
147e83 |
- lvx v2,0,r10
|
|
|
147e83 |
+ lvx v2,0,r11
|
|
|
147e83 |
+#if _CALL_ELF == 2
|
|
|
147e83 |
+ lvx v3,0,r12
|
|
|
147e83 |
+ lvx v4,r30,r11
|
|
|
147e83 |
+ lvx v5,r30,r12
|
|
|
147e83 |
+ addi r30,r30,64
|
|
|
147e83 |
+ lvx v6,r31,r11
|
|
|
147e83 |
+ lvx v7,r31,r12
|
|
|
147e83 |
+ lvx v8,r30,r11
|
|
|
147e83 |
+ lvx v9,r30,r12
|
|
|
147e83 |
+#endif
|
|
|
147e83 |
L(pltexitreturn):
|
|
|
147e83 |
ld r0,FRAME_SIZE+FRAME_LR_SAVE(r1)
|
|
|
147e83 |
- ld r31,584(r1)
|
|
|
147e83 |
- ld r30,576(r1)
|
|
|
147e83 |
+ ld r31,FRAME_SIZE-8(r1)
|
|
|
147e83 |
+ ld r30,FRAME_SIZE-16(r1)
|
|
|
147e83 |
mtlr r0
|
|
|
147e83 |
ld r1,0(r1)
|
|
|
147e83 |
blr
|
|
|
147e83 |
diff -urN glibc-2.17-c758a686/sysdeps/powerpc/powerpc64/tst-audit.h glibc-2.17-c758a686/sysdeps/powerpc/powerpc64/tst-audit.h
|
|
|
147e83 |
--- glibc-2.17-c758a686/sysdeps/powerpc/powerpc64/tst-audit.h 2014-05-29 14:11:12.000000000 -0500
|
|
|
147e83 |
+++ glibc-2.17-c758a686/sysdeps/powerpc/powerpc64/tst-audit.h 2014-05-29 14:11:20.000000000 -0500
|
|
|
147e83 |
@@ -18,8 +18,16 @@
|
|
|
147e83 |
License along with the GNU C Library. If not, see
|
|
|
147e83 |
<http://www.gnu.org/licenses/>. */
|
|
|
147e83 |
|
|
|
147e83 |
+#if _CALL_ELF != 2
|
|
|
147e83 |
#define pltenter la_ppc64_gnu_pltenter
|
|
|
147e83 |
#define pltexit la_ppc64_gnu_pltexit
|
|
|
147e83 |
#define La_regs La_ppc64_regs
|
|
|
147e83 |
#define La_retval La_ppc64_retval
|
|
|
147e83 |
#define int_retval lrv_r3
|
|
|
147e83 |
+#else
|
|
|
147e83 |
+#define pltenter la_ppc64v2_gnu_pltenter
|
|
|
147e83 |
+#define pltexit la_ppc64v2_gnu_pltexit
|
|
|
147e83 |
+#define La_regs La_ppc64v2_regs
|
|
|
147e83 |
+#define La_retval La_ppc64v2_retval
|
|
|
147e83 |
+#define int_retval lrv_r3
|
|
|
147e83 |
+#endif
|