ppc64le: fix kexec hang due to ppc64 elf abi breakage
Fedora bug: https://bugzilla.redhat.com/show_bug.cgi?id=1310495 kexec kernel hangs in ppc64le test. It is caused by kexec does not support abi v2 properly. Backport upstream patches below fixes the issue: There is no code conflicts. commit 3debb8cf3272216119cb2e59a4963ce3c18fe8e3 Author: Alan Modra <amodra@gmail.com> Date: Fri Feb 26 18:06:15 2016 +1100 Properly align powerpc64 .toc gcc leaves .toc byte aligned, relying on the linker to align the section. * kexec/arch/ppc64/kexec-elf-rel-ppc64.c (machine_verify_elf_rel): Fudge alignment of .toc section. Signed-off-by: Alan Modra <amodra@gmail.com> Signed-off-by: Anton Blanchard <anton@samba.org> Tested-by: Dave Young <dyoung@redhat.com> Signed-off-by: Simon Horman <horms@verge.net.au> commit 1e423dc297d10eb7ff25c829d2856ef12fc81d77 Author: Anton Blanchard <anton@samba.org> Date: Fri Feb 26 18:04:16 2016 +1100 ppc64: purgatory: Handle local symbols in ELF ABIv2 The PowerPC64 ELF ABIv2 has the concept of global and local symbols and information on this is encoded in sym->st_other. When doing a R_PPC64_REL24 branch we want to hit the local entry point, so adjust it as necessary. Signed-off-by: Anton Blanchard <anton@samba.org> Tested-by: Dave Young <dyoung@redhat.com> Signed-off-by: Simon Horman <horms@verge.net.au> commit 4a2ae3a39c64dc43e9d094be9541253234ff4822 Author: Anton Blanchard <anton@samba.org> Date: Fri Feb 26 18:03:11 2016 +1100 Pass struct mem_sym into machine_apply_elf_rel() On PowerPC64 ABIv2 we need to look at the symbol to determine if it has a local entry point. Pass struct mem_sym into machine_apply_elf_rel() so we can. Signed-off-by: Anton Blanchard <anton@samba.org> Tested-by: Dave Young <dyoung@redhat.com> Signed-off-by: Simon Horman <horms@verge.net.au> Signed-off-by: Dave Young <dyoung@redhat.com> Acked-by: Xunlei Pang <xlpang@redhat.com>
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@ -0,0 +1,231 @@
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From 4a2ae3a39c64dc43e9d094be9541253234ff4822 Mon Sep 17 00:00:00 2001
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From: Anton Blanchard <anton@samba.org>
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Date: Fri, 26 Feb 2016 18:03:11 +1100
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Subject: [PATCH 1/3] Pass struct mem_sym into machine_apply_elf_rel()
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On PowerPC64 ABIv2 we need to look at the symbol to determine
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if it has a local entry point. Pass struct mem_sym into
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machine_apply_elf_rel() so we can.
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Signed-off-by: Anton Blanchard <anton@samba.org>
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Tested-by: Dave Young <dyoung@redhat.com>
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Signed-off-by: Simon Horman <horms@verge.net.au>
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---
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kexec/arch/arm/kexec-elf-rel-arm.c | 5 +++--
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kexec/arch/cris/kexec-elf-rel-cris.c | 5 +++--
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kexec/arch/i386/kexec-elf-rel-x86.c | 5 +++--
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kexec/arch/ia64/kexec-elf-rel-ia64.c | 5 +++--
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kexec/arch/m68k/kexec-elf-rel-m68k.c | 4 +++-
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kexec/arch/mips/kexec-elf-rel-mips.c | 4 +++-
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kexec/arch/ppc/kexec-elf-rel-ppc.c | 5 +++--
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kexec/arch/ppc64/kexec-elf-rel-ppc64.c | 5 +++--
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kexec/arch/s390/kexec-elf-rel-s390.c | 3 ++-
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kexec/arch/sh/kexec-elf-rel-sh.c | 5 +++--
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kexec/arch/x86_64/kexec-elf-rel-x86_64.c | 5 +++--
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kexec/kexec-elf-rel.c | 2 +-
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kexec/kexec-elf.h | 5 +++--
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13 files changed, 36 insertions(+), 22 deletions(-)
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diff --git a/kexec/arch/arm/kexec-elf-rel-arm.c b/kexec/arch/arm/kexec-elf-rel-arm.c
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index 214f0cc..a939cf4 100644
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--- a/kexec/arch/arm/kexec-elf-rel-arm.c
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+++ b/kexec/arch/arm/kexec-elf-rel-arm.c
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@@ -18,8 +18,9 @@ int machine_verify_elf_rel(struct mem_ehdr *ehdr)
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return 1;
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}
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-void machine_apply_elf_rel(struct mem_ehdr *UNUSED(ehdr), unsigned long r_type,
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- void *location, unsigned long address, unsigned long value)
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+void machine_apply_elf_rel(struct mem_ehdr *UNUSED(ehdr),
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+ struct mem_sym *UNUSED(sym), unsigned long r_type, void *location,
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+ unsigned long address, unsigned long value)
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{
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switch(r_type) {
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case R_ARM_ABS32:
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diff --git a/kexec/arch/cris/kexec-elf-rel-cris.c b/kexec/arch/cris/kexec-elf-rel-cris.c
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index c4427cc..255cc2c 100644
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--- a/kexec/arch/cris/kexec-elf-rel-cris.c
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+++ b/kexec/arch/cris/kexec-elf-rel-cris.c
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@@ -29,8 +29,9 @@ int machine_verify_elf_rel(struct mem_ehdr *ehdr)
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return 1;
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}
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-void machine_apply_elf_rel(struct mem_ehdr *ehdr, unsigned long r_type,
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- void *location, unsigned long address, unsigned long value)
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+void machine_apply_elf_rel(struct mem_ehdr *UNUSED(ehdr),
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+ struct mem_sym *UNUSED(sym), unsigned long r_type, void *location,
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+ unsigned long address, unsigned long value)
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{
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switch(r_type) {
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diff --git a/kexec/arch/i386/kexec-elf-rel-x86.c b/kexec/arch/i386/kexec-elf-rel-x86.c
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index fdc3d52..55a214e 100644
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--- a/kexec/arch/i386/kexec-elf-rel-x86.c
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+++ b/kexec/arch/i386/kexec-elf-rel-x86.c
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@@ -18,8 +18,9 @@ int machine_verify_elf_rel(struct mem_ehdr *ehdr)
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return 1;
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}
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-void machine_apply_elf_rel(struct mem_ehdr *UNUSED(ehdr), unsigned long r_type,
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- void *location, unsigned long address, unsigned long value)
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+void machine_apply_elf_rel(struct mem_ehdr *UNUSED(ehdr),
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+ struct mem_sym *UNUSED(sym), unsigned long r_type, void *location,
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+ unsigned long address, unsigned long value)
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{
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switch(r_type) {
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case R_386_32:
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diff --git a/kexec/arch/ia64/kexec-elf-rel-ia64.c b/kexec/arch/ia64/kexec-elf-rel-ia64.c
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index cfb1061..f847626 100644
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--- a/kexec/arch/ia64/kexec-elf-rel-ia64.c
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+++ b/kexec/arch/ia64/kexec-elf-rel-ia64.c
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@@ -72,8 +72,9 @@ bundle (const uint64_t insn)
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return insn & ~0xfUL;
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}
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-void machine_apply_elf_rel(struct mem_ehdr *ehdr, unsigned long r_type,
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- void *location, unsigned long address, unsigned long value)
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+void machine_apply_elf_rel(struct mem_ehdr *UNUSED(ehdr),
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+ struct mem_sym *UNUSED(sym), unsigned long r_type, void *location,
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+ unsigned long address, unsigned long value)
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{
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uint64_t gp_value = ehdr->rel_addr + 0x200000;
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switch(r_type) {
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diff --git a/kexec/arch/m68k/kexec-elf-rel-m68k.c b/kexec/arch/m68k/kexec-elf-rel-m68k.c
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index fa12a16..0cc38cc 100644
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--- a/kexec/arch/m68k/kexec-elf-rel-m68k.c
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+++ b/kexec/arch/m68k/kexec-elf-rel-m68k.c
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@@ -23,7 +23,9 @@ int machine_verify_elf_rel(struct mem_ehdr *ehdr)
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return 1;
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}
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-void machine_apply_elf_rel(struct mem_ehdr *UNUSED(ehdr), unsigned long r_type,
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+void machine_apply_elf_rel(struct mem_ehdr *UNUSED(ehdr),
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+ struct mem_sym *UNUSED(sym),
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+ unsigned long r_type,
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void *UNUSED(location),
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unsigned long UNUSED(address),
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unsigned long UNUSED(value))
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diff --git a/kexec/arch/mips/kexec-elf-rel-mips.c b/kexec/arch/mips/kexec-elf-rel-mips.c
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index 6f43639..5bc22d5 100644
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--- a/kexec/arch/mips/kexec-elf-rel-mips.c
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+++ b/kexec/arch/mips/kexec-elf-rel-mips.c
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@@ -29,7 +29,9 @@ int machine_verify_elf_rel(struct mem_ehdr *ehdr)
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return 1;
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}
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-void machine_apply_elf_rel(struct mem_ehdr *UNUSED(ehdr), unsigned long r_type,
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+void machine_apply_elf_rel(struct mem_ehdr *UNUSED(ehdr),
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+ struct mem_sym *UNUSED(sym),
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+ unsigned long r_type,
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void *UNUSED(location),
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unsigned long UNUSED(address),
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unsigned long UNUSED(value))
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diff --git a/kexec/arch/ppc/kexec-elf-rel-ppc.c b/kexec/arch/ppc/kexec-elf-rel-ppc.c
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index 90a66f4..1acbd86 100644
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--- a/kexec/arch/ppc/kexec-elf-rel-ppc.c
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+++ b/kexec/arch/ppc/kexec-elf-rel-ppc.c
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@@ -17,8 +17,9 @@ int machine_verify_elf_rel(struct mem_ehdr *ehdr)
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return 1;
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}
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-void machine_apply_elf_rel(struct mem_ehdr *UNUSED(ehdr), unsigned long r_type,
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- void *location, unsigned long address, unsigned long value)
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+void machine_apply_elf_rel(struct mem_ehdr *UNUSED(ehdr),
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+ struct mem_sym *UNUSED(sym), unsigned long r_type, void *location,
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+ unsigned long address, unsigned long value)
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{
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switch(r_type) {
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case R_PPC_ADDR32:
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diff --git a/kexec/arch/ppc64/kexec-elf-rel-ppc64.c b/kexec/arch/ppc64/kexec-elf-rel-ppc64.c
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index 9b191d0..8604c4f 100644
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--- a/kexec/arch/ppc64/kexec-elf-rel-ppc64.c
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+++ b/kexec/arch/ppc64/kexec-elf-rel-ppc64.c
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@@ -63,8 +63,9 @@ static void do_relative_toc(unsigned long value, uint16_t *location,
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*location = (*location & ~mask) | (value & mask);
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}
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-void machine_apply_elf_rel(struct mem_ehdr *ehdr, unsigned long r_type,
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- void *location, unsigned long address, unsigned long value)
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+void machine_apply_elf_rel(struct mem_ehdr *ehdr, struct mem_sym *sym,
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+ unsigned long r_type, void *location, unsigned long address,
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+ unsigned long value)
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{
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switch(r_type) {
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case R_PPC64_ADDR32:
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diff --git a/kexec/arch/s390/kexec-elf-rel-s390.c b/kexec/arch/s390/kexec-elf-rel-s390.c
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index 80bcd1b..a5e1b73 100644
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--- a/kexec/arch/s390/kexec-elf-rel-s390.c
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+++ b/kexec/arch/s390/kexec-elf-rel-s390.c
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@@ -23,7 +23,8 @@ int machine_verify_elf_rel(struct mem_ehdr *ehdr)
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return 1;
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}
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-void machine_apply_elf_rel(struct mem_ehdr *ehdr,
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+void machine_apply_elf_rel(struct mem_ehdr *UNUSED(ehdr),
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+ struct mem_sym *UNUSED(sym),
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unsigned long r_type,
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void *loc,
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unsigned long address,
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diff --git a/kexec/arch/sh/kexec-elf-rel-sh.c b/kexec/arch/sh/kexec-elf-rel-sh.c
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index 0bfc45e..3993ee8 100644
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--- a/kexec/arch/sh/kexec-elf-rel-sh.c
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+++ b/kexec/arch/sh/kexec-elf-rel-sh.c
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@@ -28,8 +28,9 @@ int machine_verify_elf_rel(struct mem_ehdr *ehdr)
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return 1;
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}
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-void machine_apply_elf_rel(struct mem_ehdr *UNUSED(ehdr), unsigned long r_type,
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- void *orig_loc, unsigned long UNUSED(address), unsigned long relocation)
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+void machine_apply_elf_rel(struct mem_ehdr *UNUSED(ehdr),
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+ struct mem_sym *UNUSED(sym), unsigned long r_type, void *orig_loc,
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+ unsigned long UNUSED(address), unsigned long relocation)
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{
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uint32_t *location = orig_loc;
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uint32_t value;
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diff --git a/kexec/arch/x86_64/kexec-elf-rel-x86_64.c b/kexec/arch/x86_64/kexec-elf-rel-x86_64.c
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index c795037..7fdde73 100644
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--- a/kexec/arch/x86_64/kexec-elf-rel-x86_64.c
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+++ b/kexec/arch/x86_64/kexec-elf-rel-x86_64.c
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@@ -57,8 +57,9 @@ static const char *reloc_name(unsigned long r_type)
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return name;
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}
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-void machine_apply_elf_rel(struct mem_ehdr *UNUSED(ehdr), unsigned long r_type,
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- void *location, unsigned long address, unsigned long value)
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+void machine_apply_elf_rel(struct mem_ehdr *UNUSED(ehdr),
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+ struct mem_sym *UNUSED(sym), unsigned long r_type, void *location,
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+ unsigned long address, unsigned long value)
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{
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dbgprintf("%s\n", reloc_name(r_type));
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switch(r_type) {
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diff --git a/kexec/kexec-elf-rel.c b/kexec/kexec-elf-rel.c
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index c625f30..9a6e63d 100644
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--- a/kexec/kexec-elf-rel.c
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+++ b/kexec/kexec-elf-rel.c
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@@ -408,7 +408,7 @@ int elf_rel_load(struct mem_ehdr *ehdr, struct kexec_info *info,
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dbgprintf("sym: %s value: %lx addr: %lx\n",
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name, value, address);
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- machine_apply_elf_rel(ehdr, rel.r_type,
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+ machine_apply_elf_rel(ehdr, &sym, rel.r_type,
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(void *)location, address, value);
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}
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}
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diff --git a/kexec/kexec-elf.h b/kexec/kexec-elf.h
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index d0e9dc0..1164db4 100644
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--- a/kexec/kexec-elf.h
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+++ b/kexec/kexec-elf.h
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@@ -129,7 +129,8 @@ unsigned long elf_max_addr(const struct mem_ehdr *ehdr);
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/* Architecture specific helper functions */
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extern int machine_verify_elf_rel(struct mem_ehdr *ehdr);
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-extern void machine_apply_elf_rel(struct mem_ehdr *ehdr, unsigned long r_type,
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- void *location, unsigned long address, unsigned long value);
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+extern void machine_apply_elf_rel(struct mem_ehdr *ehdr, struct mem_sym *sym,
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+ unsigned long r_type, void *location, unsigned long address,
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+ unsigned long value);
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#endif /* KEXEC_ELF_H */
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--
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2.5.0
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69
kexec-tools-2.0.12-Properly-align-powerpc64-.toc.patch
Normal file
69
kexec-tools-2.0.12-Properly-align-powerpc64-.toc.patch
Normal file
@ -0,0 +1,69 @@
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From 3debb8cf3272216119cb2e59a4963ce3c18fe8e3 Mon Sep 17 00:00:00 2001
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From: Alan Modra <amodra@gmail.com>
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Date: Fri, 26 Feb 2016 18:06:15 +1100
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Subject: [PATCH 3/3] Properly align powerpc64 .toc
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gcc leaves .toc byte aligned, relying on the linker to align the section.
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* kexec/arch/ppc64/kexec-elf-rel-ppc64.c (machine_verify_elf_rel):
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Fudge alignment of .toc section.
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Signed-off-by: Alan Modra <amodra@gmail.com>
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Signed-off-by: Anton Blanchard <anton@samba.org>
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Tested-by: Dave Young <dyoung@redhat.com>
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Signed-off-by: Simon Horman <horms@verge.net.au>
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|
---
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kexec/arch/ppc64/kexec-elf-rel-ppc64.c | 30 ++++++++++++++++++------------
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1 file changed, 18 insertions(+), 12 deletions(-)
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diff --git a/kexec/arch/ppc64/kexec-elf-rel-ppc64.c b/kexec/arch/ppc64/kexec-elf-rel-ppc64.c
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index 43851f6..5f8e3f2 100644
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--- a/kexec/arch/ppc64/kexec-elf-rel-ppc64.c
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+++ b/kexec/arch/ppc64/kexec-elf-rel-ppc64.c
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@@ -23,18 +23,6 @@ static unsigned int local_entry_offset(struct mem_sym *UNUSED(sym))
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}
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#endif
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|
-int machine_verify_elf_rel(struct mem_ehdr *ehdr)
|
||||||
|
-{
|
||||||
|
- if (ehdr->ei_class != ELFCLASS64) {
|
||||||
|
- return 0;
|
||||||
|
- }
|
||||||
|
- if (ehdr->e_machine != EM_PPC64) {
|
||||||
|
- return 0;
|
||||||
|
- }
|
||||||
|
-
|
||||||
|
- return 1;
|
||||||
|
-}
|
||||||
|
-
|
||||||
|
static struct mem_shdr *toc_section(const struct mem_ehdr *ehdr)
|
||||||
|
{
|
||||||
|
struct mem_shdr *shdr, *shdr_end;
|
||||||
|
@@ -52,6 +40,24 @@ static struct mem_shdr *toc_section(const struct mem_ehdr *ehdr)
|
||||||
|
return NULL;
|
||||||
|
}
|
||||||
|
|
||||||
|
+int machine_verify_elf_rel(struct mem_ehdr *ehdr)
|
||||||
|
+{
|
||||||
|
+ struct mem_shdr *toc;
|
||||||
|
+
|
||||||
|
+ if (ehdr->ei_class != ELFCLASS64) {
|
||||||
|
+ return 0;
|
||||||
|
+ }
|
||||||
|
+ if (ehdr->e_machine != EM_PPC64) {
|
||||||
|
+ return 0;
|
||||||
|
+ }
|
||||||
|
+
|
||||||
|
+ /* Ensure .toc is sufficiently aligned. */
|
||||||
|
+ toc = toc_section(ehdr);
|
||||||
|
+ if (toc && toc->sh_addralign < 256)
|
||||||
|
+ toc->sh_addralign = 256;
|
||||||
|
+ return 1;
|
||||||
|
+}
|
||||||
|
+
|
||||||
|
/* r2 is the TOC pointer: it actually points 0x8000 into the TOC (this
|
||||||
|
gives the value maximum span in an instruction which uses a signed
|
||||||
|
offset) */
|
||||||
|
--
|
||||||
|
2.5.0
|
||||||
|
|
@ -0,0 +1,57 @@
|
|||||||
|
From 1e423dc297d10eb7ff25c829d2856ef12fc81d77 Mon Sep 17 00:00:00 2001
|
||||||
|
From: Anton Blanchard <anton@samba.org>
|
||||||
|
Date: Fri, 26 Feb 2016 18:04:16 +1100
|
||||||
|
Subject: [PATCH 2/3] ppc64: purgatory: Handle local symbols in ELF ABIv2
|
||||||
|
|
||||||
|
The PowerPC64 ELF ABIv2 has the concept of global and local symbols
|
||||||
|
and information on this is encoded in sym->st_other. When doing a
|
||||||
|
R_PPC64_REL24 branch we want to hit the local entry point, so adjust
|
||||||
|
it as necessary.
|
||||||
|
|
||||||
|
Signed-off-by: Anton Blanchard <anton@samba.org>
|
||||||
|
Tested-by: Dave Young <dyoung@redhat.com>
|
||||||
|
Signed-off-by: Simon Horman <horms@verge.net.au>
|
||||||
|
---
|
||||||
|
kexec/arch/ppc64/kexec-elf-rel-ppc64.c | 19 +++++++++++++++++++
|
||||||
|
1 file changed, 19 insertions(+)
|
||||||
|
|
||||||
|
diff --git a/kexec/arch/ppc64/kexec-elf-rel-ppc64.c b/kexec/arch/ppc64/kexec-elf-rel-ppc64.c
|
||||||
|
index 8604c4f..43851f6 100644
|
||||||
|
--- a/kexec/arch/ppc64/kexec-elf-rel-ppc64.c
|
||||||
|
+++ b/kexec/arch/ppc64/kexec-elf-rel-ppc64.c
|
||||||
|
@@ -5,6 +5,24 @@
|
||||||
|
#include "../../kexec-elf.h"
|
||||||
|
#include "kexec-ppc64.h"
|
||||||
|
|
||||||
|
+#if defined(_CALL_ELF) && _CALL_ELF == 2
|
||||||
|
+#define STO_PPC64_LOCAL_BIT 5
|
||||||
|
+#define STO_PPC64_LOCAL_MASK (7 << STO_PPC64_LOCAL_BIT)
|
||||||
|
+#define PPC64_LOCAL_ENTRY_OFFSET(other) \
|
||||||
|
+ (((1 << (((other) & STO_PPC64_LOCAL_MASK) >> STO_PPC64_LOCAL_BIT)) >> 2) << 2)
|
||||||
|
+
|
||||||
|
+static unsigned int local_entry_offset(struct mem_sym *sym)
|
||||||
|
+{
|
||||||
|
+ /* If this symbol has a local entry point, use it. */
|
||||||
|
+ return PPC64_LOCAL_ENTRY_OFFSET(sym->st_other);
|
||||||
|
+}
|
||||||
|
+#else
|
||||||
|
+static unsigned int local_entry_offset(struct mem_sym *UNUSED(sym))
|
||||||
|
+{
|
||||||
|
+ return 0;
|
||||||
|
+}
|
||||||
|
+#endif
|
||||||
|
+
|
||||||
|
int machine_verify_elf_rel(struct mem_ehdr *ehdr)
|
||||||
|
{
|
||||||
|
if (ehdr->ei_class != ELFCLASS64) {
|
||||||
|
@@ -114,6 +132,7 @@ void machine_apply_elf_rel(struct mem_ehdr *ehdr, struct mem_sym *sym,
|
||||||
|
break;
|
||||||
|
|
||||||
|
case R_PPC64_REL24:
|
||||||
|
+ value += local_entry_offset(sym);
|
||||||
|
/* Convert value to relative */
|
||||||
|
value -= address;
|
||||||
|
if (value + 0x2000000 > 0x3ffffff || (value & 3) != 0) {
|
||||||
|
--
|
||||||
|
2.5.0
|
||||||
|
|
@ -70,6 +70,9 @@ ExcludeArch: aarch64
|
|||||||
#
|
#
|
||||||
# Patches 301 through 400 are meant for ppc64 kexec-tools enablement
|
# Patches 301 through 400 are meant for ppc64 kexec-tools enablement
|
||||||
#
|
#
|
||||||
|
Patch501: kexec-tools-2.0.12-Pass-struct-mem_sym-into-machine_apply_elf_rel.patch
|
||||||
|
Patch502: kexec-tools-2.0.12-ppc64-purgatory-Handle-local-symbols-in-ELF-ABIv2.patch
|
||||||
|
Patch503: kexec-tools-2.0.12-Properly-align-powerpc64-.toc.patch
|
||||||
|
|
||||||
#
|
#
|
||||||
# Patches 401 through 500 are meant for s390 kexec-tools enablement
|
# Patches 401 through 500 are meant for s390 kexec-tools enablement
|
||||||
@ -105,6 +108,9 @@ tar -z -x -v -f %{SOURCE19}
|
|||||||
tar -z -x -v -f %{SOURCE23}
|
tar -z -x -v -f %{SOURCE23}
|
||||||
|
|
||||||
|
|
||||||
|
%patch501 -p1
|
||||||
|
%patch502 -p1
|
||||||
|
%patch503 -p1
|
||||||
%patch601 -p1
|
%patch601 -p1
|
||||||
|
|
||||||
%ifarch ppc
|
%ifarch ppc
|
||||||
|
Loading…
Reference in New Issue
Block a user