[PATCH 1/3] Pass struct mem_sym into machine_apply_elf_rel()
Dave Young
dyoung at redhat.com
Fri Feb 26 03:53:55 PST 2016
On 02/26/16 at 06:03pm, Anton Blanchard wrote:
> 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 at samba.org>
> ---
> kexec/arch/arm/kexec-elf-rel-arm.c | 5 +++--
> kexec/arch/cris/kexec-elf-rel-cris.c | 5 +++--
> kexec/arch/i386/kexec-elf-rel-x86.c | 5 +++--
> kexec/arch/ia64/kexec-elf-rel-ia64.c | 5 +++--
> kexec/arch/m68k/kexec-elf-rel-m68k.c | 4 +++-
> kexec/arch/mips/kexec-elf-rel-mips.c | 4 +++-
> kexec/arch/ppc/kexec-elf-rel-ppc.c | 5 +++--
> kexec/arch/ppc64/kexec-elf-rel-ppc64.c | 5 +++--
> kexec/arch/s390/kexec-elf-rel-s390.c | 3 ++-
> kexec/arch/sh/kexec-elf-rel-sh.c | 5 +++--
> kexec/arch/x86_64/kexec-elf-rel-x86_64.c | 5 +++--
> kexec/kexec-elf-rel.c | 2 +-
> kexec/kexec-elf.h | 5 +++--
> 13 files changed, 36 insertions(+), 22 deletions(-)
>
> diff --git a/kexec/arch/arm/kexec-elf-rel-arm.c b/kexec/arch/arm/kexec-elf-rel-arm.c
> index 214f0cc..a939cf4 100644
> --- a/kexec/arch/arm/kexec-elf-rel-arm.c
> +++ b/kexec/arch/arm/kexec-elf-rel-arm.c
> @@ -18,8 +18,9 @@ int machine_verify_elf_rel(struct mem_ehdr *ehdr)
> return 1;
> }
>
> -void machine_apply_elf_rel(struct mem_ehdr *UNUSED(ehdr), unsigned long r_type,
> - void *location, unsigned long address, unsigned long value)
> +void machine_apply_elf_rel(struct mem_ehdr *UNUSED(ehdr),
> + struct mem_sym *UNUSED(sym), unsigned long r_type, void *location,
> + unsigned long address, unsigned long value)
> {
> switch(r_type) {
> case R_ARM_ABS32:
> diff --git a/kexec/arch/cris/kexec-elf-rel-cris.c b/kexec/arch/cris/kexec-elf-rel-cris.c
> index c4427cc..255cc2c 100644
> --- a/kexec/arch/cris/kexec-elf-rel-cris.c
> +++ b/kexec/arch/cris/kexec-elf-rel-cris.c
> @@ -29,8 +29,9 @@ int machine_verify_elf_rel(struct mem_ehdr *ehdr)
> return 1;
> }
>
> -void machine_apply_elf_rel(struct mem_ehdr *ehdr, unsigned long r_type,
> - void *location, unsigned long address, unsigned long value)
> +void machine_apply_elf_rel(struct mem_ehdr *UNUSED(ehdr),
> + struct mem_sym *UNUSED(sym), unsigned long r_type, void *location,
> + unsigned long address, unsigned long value)
> {
> switch(r_type) {
>
> diff --git a/kexec/arch/i386/kexec-elf-rel-x86.c b/kexec/arch/i386/kexec-elf-rel-x86.c
> index fdc3d52..55a214e 100644
> --- a/kexec/arch/i386/kexec-elf-rel-x86.c
> +++ b/kexec/arch/i386/kexec-elf-rel-x86.c
> @@ -18,8 +18,9 @@ int machine_verify_elf_rel(struct mem_ehdr *ehdr)
> return 1;
> }
>
> -void machine_apply_elf_rel(struct mem_ehdr *UNUSED(ehdr), unsigned long r_type,
> - void *location, unsigned long address, unsigned long value)
> +void machine_apply_elf_rel(struct mem_ehdr *UNUSED(ehdr),
> + struct mem_sym *UNUSED(sym), unsigned long r_type, void *location,
> + unsigned long address, unsigned long value)
> {
> switch(r_type) {
> case R_386_32:
> diff --git a/kexec/arch/ia64/kexec-elf-rel-ia64.c b/kexec/arch/ia64/kexec-elf-rel-ia64.c
> index cfb1061..f847626 100644
> --- a/kexec/arch/ia64/kexec-elf-rel-ia64.c
> +++ b/kexec/arch/ia64/kexec-elf-rel-ia64.c
> @@ -72,8 +72,9 @@ bundle (const uint64_t insn)
> return insn & ~0xfUL;
> }
>
> -void machine_apply_elf_rel(struct mem_ehdr *ehdr, unsigned long r_type,
> - void *location, unsigned long address, unsigned long value)
> +void machine_apply_elf_rel(struct mem_ehdr *UNUSED(ehdr),
> + struct mem_sym *UNUSED(sym), unsigned long r_type, void *location,
> + unsigned long address, unsigned long value)
> {
> uint64_t gp_value = ehdr->rel_addr + 0x200000;
> switch(r_type) {
> diff --git a/kexec/arch/m68k/kexec-elf-rel-m68k.c b/kexec/arch/m68k/kexec-elf-rel-m68k.c
> index fa12a16..0cc38cc 100644
> --- a/kexec/arch/m68k/kexec-elf-rel-m68k.c
> +++ b/kexec/arch/m68k/kexec-elf-rel-m68k.c
> @@ -23,7 +23,9 @@ int machine_verify_elf_rel(struct mem_ehdr *ehdr)
> return 1;
> }
>
> -void machine_apply_elf_rel(struct mem_ehdr *UNUSED(ehdr), unsigned long r_type,
> +void machine_apply_elf_rel(struct mem_ehdr *UNUSED(ehdr),
> + struct mem_sym *UNUSED(sym),
> + unsigned long r_type,
> void *UNUSED(location),
> unsigned long UNUSED(address),
> unsigned long UNUSED(value))
> diff --git a/kexec/arch/mips/kexec-elf-rel-mips.c b/kexec/arch/mips/kexec-elf-rel-mips.c
> index 6f43639..5bc22d5 100644
> --- a/kexec/arch/mips/kexec-elf-rel-mips.c
> +++ b/kexec/arch/mips/kexec-elf-rel-mips.c
> @@ -29,7 +29,9 @@ int machine_verify_elf_rel(struct mem_ehdr *ehdr)
> return 1;
> }
>
> -void machine_apply_elf_rel(struct mem_ehdr *UNUSED(ehdr), unsigned long r_type,
> +void machine_apply_elf_rel(struct mem_ehdr *UNUSED(ehdr),
> + struct mem_sym *UNUSED(sym),
> + unsigned long r_type,
> void *UNUSED(location),
> unsigned long UNUSED(address),
> unsigned long UNUSED(value))
> diff --git a/kexec/arch/ppc/kexec-elf-rel-ppc.c b/kexec/arch/ppc/kexec-elf-rel-ppc.c
> index 90a66f4..1acbd86 100644
> --- a/kexec/arch/ppc/kexec-elf-rel-ppc.c
> +++ b/kexec/arch/ppc/kexec-elf-rel-ppc.c
> @@ -17,8 +17,9 @@ int machine_verify_elf_rel(struct mem_ehdr *ehdr)
> return 1;
> }
>
> -void machine_apply_elf_rel(struct mem_ehdr *UNUSED(ehdr), unsigned long r_type,
> - void *location, unsigned long address, unsigned long value)
> +void machine_apply_elf_rel(struct mem_ehdr *UNUSED(ehdr),
> + struct mem_sym *UNUSED(sym), unsigned long r_type, void *location,
> + unsigned long address, unsigned long value)
> {
> switch(r_type) {
> case R_PPC_ADDR32:
> diff --git a/kexec/arch/ppc64/kexec-elf-rel-ppc64.c b/kexec/arch/ppc64/kexec-elf-rel-ppc64.c
> index 9b191d0..8604c4f 100644
> --- a/kexec/arch/ppc64/kexec-elf-rel-ppc64.c
> +++ b/kexec/arch/ppc64/kexec-elf-rel-ppc64.c
> @@ -63,8 +63,9 @@ static void do_relative_toc(unsigned long value, uint16_t *location,
> *location = (*location & ~mask) | (value & mask);
> }
>
> -void machine_apply_elf_rel(struct mem_ehdr *ehdr, unsigned long r_type,
> - void *location, unsigned long address, unsigned long value)
> +void machine_apply_elf_rel(struct mem_ehdr *ehdr, struct mem_sym *sym,
> + unsigned long r_type, void *location, unsigned long address,
> + unsigned long value)
> {
> switch(r_type) {
> case R_PPC64_ADDR32:
> diff --git a/kexec/arch/s390/kexec-elf-rel-s390.c b/kexec/arch/s390/kexec-elf-rel-s390.c
> index 80bcd1b..a5e1b73 100644
> --- a/kexec/arch/s390/kexec-elf-rel-s390.c
> +++ b/kexec/arch/s390/kexec-elf-rel-s390.c
> @@ -23,7 +23,8 @@ int machine_verify_elf_rel(struct mem_ehdr *ehdr)
> return 1;
> }
>
> -void machine_apply_elf_rel(struct mem_ehdr *ehdr,
> +void machine_apply_elf_rel(struct mem_ehdr *UNUSED(ehdr),
> + struct mem_sym *UNUSED(sym),
> unsigned long r_type,
> void *loc,
> unsigned long address,
> diff --git a/kexec/arch/sh/kexec-elf-rel-sh.c b/kexec/arch/sh/kexec-elf-rel-sh.c
> index 0bfc45e..3993ee8 100644
> --- a/kexec/arch/sh/kexec-elf-rel-sh.c
> +++ b/kexec/arch/sh/kexec-elf-rel-sh.c
> @@ -28,8 +28,9 @@ int machine_verify_elf_rel(struct mem_ehdr *ehdr)
> return 1;
> }
>
> -void machine_apply_elf_rel(struct mem_ehdr *UNUSED(ehdr), unsigned long r_type,
> - void *orig_loc, unsigned long UNUSED(address), unsigned long relocation)
> +void machine_apply_elf_rel(struct mem_ehdr *UNUSED(ehdr),
> + struct mem_sym *UNUSED(sym), unsigned long r_type, void *orig_loc,
> + unsigned long UNUSED(address), unsigned long relocation)
> {
> uint32_t *location = orig_loc;
> uint32_t value;
> diff --git a/kexec/arch/x86_64/kexec-elf-rel-x86_64.c b/kexec/arch/x86_64/kexec-elf-rel-x86_64.c
> index c795037..7fdde73 100644
> --- a/kexec/arch/x86_64/kexec-elf-rel-x86_64.c
> +++ b/kexec/arch/x86_64/kexec-elf-rel-x86_64.c
> @@ -57,8 +57,9 @@ static const char *reloc_name(unsigned long r_type)
> return name;
> }
>
> -void machine_apply_elf_rel(struct mem_ehdr *UNUSED(ehdr), unsigned long r_type,
> - void *location, unsigned long address, unsigned long value)
> +void machine_apply_elf_rel(struct mem_ehdr *UNUSED(ehdr),
> + struct mem_sym *UNUSED(sym), unsigned long r_type, void *location,
> + unsigned long address, unsigned long value)
> {
> dbgprintf("%s\n", reloc_name(r_type));
> switch(r_type) {
> diff --git a/kexec/kexec-elf-rel.c b/kexec/kexec-elf-rel.c
> index c625f30..9a6e63d 100644
> --- a/kexec/kexec-elf-rel.c
> +++ b/kexec/kexec-elf-rel.c
> @@ -408,7 +408,7 @@ int elf_rel_load(struct mem_ehdr *ehdr, struct kexec_info *info,
> dbgprintf("sym: %s value: %lx addr: %lx\n",
> name, value, address);
>
> - machine_apply_elf_rel(ehdr, rel.r_type,
> + machine_apply_elf_rel(ehdr, &sym, rel.r_type,
> (void *)location, address, value);
> }
> }
> diff --git a/kexec/kexec-elf.h b/kexec/kexec-elf.h
> index d0e9dc0..1164db4 100644
> --- a/kexec/kexec-elf.h
> +++ b/kexec/kexec-elf.h
> @@ -129,7 +129,8 @@ unsigned long elf_max_addr(const struct mem_ehdr *ehdr);
>
> /* Architecture specific helper functions */
> extern int machine_verify_elf_rel(struct mem_ehdr *ehdr);
> -extern void machine_apply_elf_rel(struct mem_ehdr *ehdr, unsigned long r_type,
> - void *location, unsigned long address, unsigned long value);
> +extern void machine_apply_elf_rel(struct mem_ehdr *ehdr, struct mem_sym *sym,
> + unsigned long r_type, void *location, unsigned long address,
> + unsigned long value);
> #endif /* KEXEC_ELF_H */
>
> --
> 2.5.0
>
>
> _______________________________________________
> kexec mailing list
> kexec at lists.infradead.org
> http://lists.infradead.org/mailman/listinfo/kexec
Tested the 3 patches on ppc64le installed Fedora 23
With the patches applied, I can not reproduce the bug below:
https://bugzilla.redhat.com/show_bug.cgi?id=1310495
But loading older kernel ie. 3.10 kernel from RHEL it is not sufficient,
still need another patch:
http://lists.infradead.org/pipermail/kexec/2016-February/015445.html
But above one is only necessary for old kernel, there may be some kernel changes
for dtb in recent kernel, I'm not sure why kernel versions matter.
Tested-by: Dave Young <dyoung at redhat.com>
Thanks
Dave
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