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crosstool-ng/packages/glibc/2.17/0064-glibc-ppc64le-42.patch
Alexey Neyman 86c2982568 Run patches thru manage-packages -P 
This refreshes the line numbers, removes any fuzz (which would make any
future forward ports easier) and standardizes the patch/file headers
(which makes them easier to read).

Signed-off-by: Alexey Neyman <stilor@att.net>
2022-02-11 00:47:51 -08:00

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# commit 61cd8fe4017c251617dd300818917e61a12ab48e
# Author: Ulrich Weigand <Ulrich.Weigand@de.ibm.com>
# Date: Wed Dec 4 06:59:37 2013 -0600
#
# 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.
#
---
# sysdeps/powerpc/bits/link.h | 46 ++++++++++
# sysdeps/powerpc/ldsodefs.h | 18 +++-
# sysdeps/powerpc/powerpc64/dl-machine.h | 5 +
# sysdeps/powerpc/powerpc64/dl-trampoline.S | 131 ++++++++++++++++++++----------
# sysdeps/powerpc/powerpc64/tst-audit.h | 8 +
# 5 files changed, 163 insertions(+), 45 deletions(-)
#
--- a/sysdeps/powerpc/bits/link.h
+++ b/sysdeps/powerpc/bits/link.h
@@ -63,7 +63,7 @@
__END_DECLS
-#else
+#elif _CALL_ELF != 2
/* Registers for entry into PLT on PPC64. */
typedef struct La_ppc64_regs
@@ -107,4 +107,48 @@
__END_DECLS
+#else
+
+/* Registers for entry into PLT on PPC64 in the ELFv2 ABI. */
+typedef struct La_ppc64v2_regs
+{
+ uint64_t lr_reg[8];
+ double lr_fp[13];
+ uint32_t __padding;
+ uint32_t lr_vrsave;
+ uint32_t lr_vreg[12][4] __attribute__ ((aligned (16)));
+ uint64_t lr_r1;
+ uint64_t lr_lr;
+} La_ppc64v2_regs;
+
+/* Return values for calls from PLT on PPC64 in the ELFv2 ABI. */
+typedef struct La_ppc64v2_retval
+{
+ uint64_t lrv_r3;
+ uint64_t lrv_r4;
+ double lrv_fp[10];
+ uint32_t lrv_vreg[8][4] __attribute__ ((aligned (16)));
+} La_ppc64v2_retval;
+
+
+__BEGIN_DECLS
+
+extern Elf64_Addr la_ppc64v2_gnu_pltenter (Elf64_Sym *__sym,
+ unsigned int __ndx,
+ uintptr_t *__refcook,
+ uintptr_t *__defcook,
+ La_ppc64v2_regs *__regs,
+ unsigned int *__flags,
+ const char *__symname,
+ long int *__framesizep);
+extern unsigned int la_ppc64v2_gnu_pltexit (Elf64_Sym *__sym,
+ unsigned int __ndx,
+ uintptr_t *__refcook,
+ uintptr_t *__defcook,
+ const La_ppc64v2_regs *__inregs,
+ La_ppc64v2_retval *__outregs,
+ const char *__symname);
+
+__END_DECLS
+
#endif
--- a/sysdeps/powerpc/ldsodefs.h
+++ b/sysdeps/powerpc/ldsodefs.h
@@ -25,6 +25,8 @@
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 @@
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 @@
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>
--- a/sysdeps/powerpc/powerpc64/dl-machine.h
+++ b/sysdeps/powerpc/powerpc64/dl-machine.h
@@ -546,8 +546,13 @@
/* Names of the architecture-specific auditing callback functions. */
+#if _CALL_ELF != 2
#define ARCH_LA_PLTENTER ppc64_gnu_pltenter
#define ARCH_LA_PLTEXIT ppc64_gnu_pltexit
+#else
+#define ARCH_LA_PLTENTER ppc64v2_gnu_pltenter
+#define ARCH_LA_PLTEXIT ppc64v2_gnu_pltexit
+#endif
#endif /* dl_machine_h */
--- a/sysdeps/powerpc/powerpc64/dl-trampoline.S
+++ b/sysdeps/powerpc/powerpc64/dl-trampoline.S
@@ -50,11 +50,8 @@
/* Store the LR in the LR Save area. */
std r0,FRAME_SIZE+FRAME_LR_SAVE(r1)
cfi_offset (lr, FRAME_LR_SAVE)
- mfcr r0
std r9,INT_PARMS+48(r1)
std r10,INT_PARMS+56(r1)
-/* I'm almost certain we don't have to save cr... be safe. */
- std r0,FRAME_SIZE+FRAME_CR_SAVE(r1)
bl JUMPTARGET(_dl_fixup)
#ifndef SHARED
nop
@@ -66,11 +63,9 @@
ld r8,INT_PARMS+40(r1)
ld r7,INT_PARMS+32(r1)
mtlr r0
- ld r0,FRAME_SIZE+FRAME_CR_SAVE(r1)
ld r6,INT_PARMS+24(r1)
ld r5,INT_PARMS+16(r1)
ld r4,INT_PARMS+8(r1)
- mtcrf 0xFF,r0
/* Prepare for calling the function returned by fixup. */
PPC64_LOAD_FUNCPTR r3
ld r3,INT_PARMS+0(r1)
@@ -85,18 +80,30 @@
#undef FRAME_SIZE
#undef INT_PARMS
- /* Stack layout:
- (Note: some of these are not required for the ELFv2 ABI.)
- +592 previous backchain
- +584 spill_r31
- +576 spill_r30
- +560 v1
- +552 fp4
- +544 fp3
- +536 fp2
- +528 fp1
- +520 r4
- +512 r3
+ /* Stack layout: ELFv2 ABI.
+ +752 previous backchain
+ +744 spill_r31
+ +736 spill_r30
+ +720 v8
+ +704 v7
+ +688 v6
+ +672 v5
+ +656 v4
+ +640 v3
+ +624 v2
+ +608 v1
+ +600 fp10
+ ELFv1 ABI +592 fp9
+ +592 previous backchain +584 fp8
+ +584 spill_r31 +576 fp7
+ +576 spill_r30 +568 fp6
+ +560 v1 +560 fp5
+ +552 fp4 +552 fp4
+ +544 fp3 +544 fp3
+ +536 fp2 +536 fp2
+ +528 fp1 +528 fp1
+ +520 r4 +520 r4
+ +512 r3 +512 r3
return values
+504 free
+496 stackframe
@@ -157,10 +164,15 @@
+8 CR save area
r1+0 stack back chain
*/
-#define FRAME_SIZE 592
+#if _CALL_ELF == 2
+# define FRAME_SIZE 752
+# define VR_RTN 608
+#else
+# define FRAME_SIZE 592
+# define VR_RTN 560
+#endif
#define INT_RTN 512
#define FPR_RTN 528
-#define VR_RTN 560
#define STACK_FRAME 496
#define CALLING_LR 488
#define CALLING_SP 480
@@ -205,18 +217,14 @@
mflr r5
std r7,INT_PARMS+32(r1)
std r8,INT_PARMS+40(r1)
-/* Store the LR in the LR Save area of the previous frame. */
-/* XXX Do we have to do this? */
+/* Store the LR in the LR Save area. */
la r8,FRAME_SIZE(r1)
std r5,FRAME_SIZE+FRAME_LR_SAVE(r1)
cfi_offset (lr, FRAME_LR_SAVE)
std r5,CALLING_LR(r1)
- mfcr r0
std r9,INT_PARMS+48(r1)
std r10,INT_PARMS+56(r1)
std r8,CALLING_SP(r1)
-/* I'm almost certain we don't have to save cr... be safe. */
- std r0,FRAME_SIZE+FRAME_CR_SAVE(r1)
ld r12,.LC__dl_hwcap@toc(r2)
#ifdef SHARED
/* Load _rtld_local_ro._dl_hwcap. */
@@ -319,11 +327,9 @@
ld r8,INT_PARMS+40(r1)
ld r7,INT_PARMS+32(r1)
mtlr r0
- ld r0,FRAME_SIZE+FRAME_CR_SAVE(r1)
ld r6,INT_PARMS+24(r1)
ld r5,INT_PARMS+16(r1)
ld r4,INT_PARMS+8(r1)
- mtcrf 0xFF,r0
/* Prepare for calling the function returned by fixup. */
PPC64_LOAD_FUNCPTR r3
ld r3,INT_PARMS+0(r1)
@@ -346,10 +352,11 @@
lfd fp12,FPR_PARMS+88(r1)
lfd fp13,FPR_PARMS+96(r1)
/* Unwind the stack frame, and jump. */
- ld r31,584(r1)
- ld r30,576(r1)
+ ld r31,FRAME_SIZE-8(r1)
+ ld r30,FRAME_SIZE-16(r1)
addi r1,r1,FRAME_SIZE
bctr
+
L(do_pltexit):
la r10,(VR_PARMS+0)(r1)
la r9,(VR_PARMS+16)(r1)
@@ -383,11 +390,9 @@
ld r8,INT_PARMS+40(r1)
ld r7,INT_PARMS+32(r1)
mtlr r0
- ld r0,FRAME_SIZE+FRAME_CR_SAVE(r1)
ld r6,INT_PARMS+24(r1)
ld r5,INT_PARMS+16(r1)
ld r4,INT_PARMS+8(r1)
- mtcrf 0xFF,r0
/* Prepare for calling the function returned by fixup. */
std r2,FRAME_TOC_SAVE(r1)
PPC64_LOAD_FUNCPTR r3
@@ -413,16 +418,37 @@
/* But return here and store the return values. */
std r3,INT_RTN(r1)
std r4,INT_RTN+8(r1)
- stfd fp1,FPR_PARMS+0(r1)
- stfd fp2,FPR_PARMS+8(r1)
+ stfd fp1,FPR_RTN+0(r1)
+ stfd fp2,FPR_RTN+8(r1)
cmpdi cr0,r12,0
la r10,VR_RTN(r1)
- stfd fp3,FPR_PARMS+16(r1)
- stfd fp4,FPR_PARMS+24(r1)
+ stfd fp3,FPR_RTN+16(r1)
+ stfd fp4,FPR_RTN+24(r1)
+#if _CALL_ELF == 2
+ la r12,VR_RTN+16(r1)
+ stfd fp5,FPR_RTN+32(r1)
+ stfd fp6,FPR_RTN+40(r1)
+ li r5,32
+ li r6,64
+ stfd fp7,FPR_RTN+48(r1)
+ stfd fp8,FPR_RTN+56(r1)
+ stfd fp9,FPR_RTN+64(r1)
+ stfd fp10,FPR_RTN+72(r1)
+#endif
mr r3,r31
mr r4,r30
beq L(callpltexit)
stvx v2,0,r10
+#if _CALL_ELF == 2
+ stvx v3,0,r12
+ stvx v4,r5,r10
+ stvx v5,r5,r12
+ addi r5,r5,64
+ stvx v6,r6,r10
+ stvx v7,r6,r12
+ stvx v8,r5,r10
+ stvx v9,r5,r12
+#endif
L(callpltexit):
addi r5,r1,INT_PARMS
addi r6,r1,INT_RTN
@@ -434,18 +460,39 @@
lwz r12,VR_VRSAVE(r1)
ld r3,INT_RTN(r1)
ld r4,INT_RTN+8(r1)
- lfd fp1,FPR_PARMS+0(r1)
- lfd fp2,FPR_PARMS+8(r1)
+ lfd fp1,FPR_RTN+0(r1)
+ lfd fp2,FPR_RTN+8(r1)
cmpdi cr0,r12,0
- la r10,VR_RTN(r1)
- lfd fp3,FPR_PARMS+16(r1)
- lfd fp4,FPR_PARMS+24(r1)
+ la r11,VR_RTN(r1)
+ lfd fp3,FPR_RTN+16(r1)
+ lfd fp4,FPR_RTN+24(r1)
+#if _CALL_ELF == 2
+ la r12,VR_RTN+16(r1)
+ lfd fp5,FPR_RTN+32(r1)
+ lfd fp6,FPR_RTN+40(r1)
+ li r30,32
+ li r31,64
+ lfd fp7,FPR_RTN+48(r1)
+ lfd fp8,FPR_RTN+56(r1)
+ lfd fp9,FPR_RTN+64(r1)
+ lfd fp10,FPR_RTN+72(r1)
+#endif
beq L(pltexitreturn)
- lvx v2,0,r10
+ lvx v2,0,r11
+#if _CALL_ELF == 2
+ lvx v3,0,r12
+ lvx v4,r30,r11
+ lvx v5,r30,r12
+ addi r30,r30,64
+ lvx v6,r31,r11
+ lvx v7,r31,r12
+ lvx v8,r30,r11
+ lvx v9,r30,r12
+#endif
L(pltexitreturn):
ld r0,FRAME_SIZE+FRAME_LR_SAVE(r1)
- ld r31,584(r1)
- ld r30,576(r1)
+ ld r31,FRAME_SIZE-8(r1)
+ ld r30,FRAME_SIZE-16(r1)
mtlr r0
ld r1,0(r1)
blr
--- a/sysdeps/powerpc/powerpc64/tst-audit.h
+++ b/sysdeps/powerpc/powerpc64/tst-audit.h
@@ -18,8 +18,16 @@
License along with the GNU C Library. If not, see
<http://www.gnu.org/licenses/>. */
+#if _CALL_ELF != 2
#define pltenter la_ppc64_gnu_pltenter
#define pltexit la_ppc64_gnu_pltexit
#define La_regs La_ppc64_regs
#define La_retval La_ppc64_retval
#define int_retval lrv_r3
+#else
+#define pltenter la_ppc64v2_gnu_pltenter
+#define pltexit la_ppc64v2_gnu_pltexit
+#define La_regs La_ppc64v2_regs
+#define La_retval La_ppc64v2_retval
+#define int_retval lrv_r3
+#endif
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