diff options
| -rw-r--r-- | kexec/arch/ppc64/kexec-elf-rel-ppc64.c | 44 |
1 files changed, 36 insertions, 8 deletions
diff --git a/kexec/arch/ppc64/kexec-elf-rel-ppc64.c b/kexec/arch/ppc64/kexec-elf-rel-ppc64.c index d293f6d..54d506a 100644 --- a/kexec/arch/ppc64/kexec-elf-rel-ppc64.c +++ b/kexec/arch/ppc64/kexec-elf-rel-ppc64.c @@ -52,6 +52,19 @@ unsigned long my_r2(const struct mem_ehdr *ehdr) return shdr->sh_addr + 0x8000; } +static void do_relative_toc(unsigned long value, uint16_t *location, + unsigned long mask, int complain_signed) +{ + if (complain_signed && (value + 0x8000 > 0xffff)) { + die("TOC16 relocation overflows (%lu)\n", value); + } + + if ((~mask & 0xffff) & value) { + die("bad TOC16 relocation (%lu)\n", value); + } + + *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) @@ -76,15 +89,30 @@ void machine_apply_elf_rel(struct mem_ehdr *ehdr, unsigned long r_type, *(uint64_t *)location = my_r2(ehdr); break; + case R_PPC64_TOC16: + do_relative_toc(value - my_r2(ehdr), location, 0xffff, 1); + break; + case R_PPC64_TOC16_DS: - /* Subtact TOC pointer */ - value -= my_r2(ehdr); - if ((value & 3) != 0 || value + 0x8000 > 0xffff) { - die("bad TOC16_DS relocation (%lu)\n", value); - } - *((uint16_t *) location) - = (*((uint16_t *) location) & ~0xfffc) - | (value & 0xfffc); + do_relative_toc(value - my_r2(ehdr), location, 0xfffc, 1); + break; + + case R_PPC64_TOC16_LO: + do_relative_toc(value - my_r2(ehdr), location, 0xffff, 0); + break; + + case R_PPC64_TOC16_LO_DS: + do_relative_toc(value - my_r2(ehdr), location, 0xfffc, 0); + break; + + case R_PPC64_TOC16_HI: + do_relative_toc((value - my_r2(ehdr)) >> 16, location, + 0xffff, 0); + break; + + case R_PPC64_TOC16_HA: + do_relative_toc((value - my_r2(ehdr) + 0x8000) >> 16, location, + 0xffff, 0); break; case R_PPC64_REL24: |