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riscv: tools: Handle addend to absolute reloc in prelink-riscv 

Previously the handling of R_RISCV_32 and R_RISCV_64 would simply
insert the value of the symbol and ignore any addend.  However, there
exist relocs where the addend is non-zero:

0000000080250900 R_RISCV_64        efi_runtime_services+0x0000000000000068
0000000080250910 R_RISCV_64        efi_runtime_services+0x0000000000000038
0000000080250920 R_RISCV_64        efi_runtime_services+0x0000000000000018
0000000080250930 R_RISCV_64        efi_runtime_services+0x0000000000000020
0000000080250980 R_RISCV_64        efi_runtime_services+0x0000000000000048
0000000080250990 R_RISCV_64        efi_runtime_services+0x0000000000000050
00000000802509a0 R_RISCV_64        efi_runtime_services+0x0000000000000058
0000000080250940 R_RISCV_64        systab+0x0000000000000030
0000000080250950 R_RISCV_64        systab+0x0000000000000040
0000000080250960 R_RISCV_64        systab+0x0000000000000050
0000000080250970 R_RISCV_64        systab+0x0000000000000060

In these cases the addend needs to be added to the symbol value to get
the correct value for the reloc.

Signed-off-by: Marcus Comstedt <marcus@mc.pp.se>
Cc: Rick Chen <rick@andestech.com>
This commit is contained in:
Marcus Comstedt 2019-08-11 11:29:57 +02:00 committed by Andes
parent f379fa6406
commit 71bdfcb21d
1 changed files with 6 additions and 2 deletions
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8
tools/prelink-riscv.inc
View File

@ -27,6 +27,8 @@
#define target32_to_cpu CONCAT(PRELINK_BYTEORDER, 32_to_cpu)
#define target64_to_cpu CONCAT(PRELINK_BYTEORDER, 64_to_cpu)
#define targetnn_to_cpu CONCAT3(PRELINK_BYTEORDER, PRELINK_INC_BITS, _to_cpu)
#define cpu_to_target32 CONCAT3(cpu_to_, PRELINK_BYTEORDER, 32)
#define cpu_to_target64 CONCAT3(cpu_to_, PRELINK_BYTEORDER, 64)
static void* get_offset_bonn (void* data, Elf_Phdr* phdrs, size_t phnum, Elf_Addr addr)
{
@ -92,9 +94,9 @@ static void prelink_bonn(void *data)
if (ELF_R_TYPE(targetnn_to_cpu(r->r_info)) == R_RISCV_RELATIVE)
*((uintnn_t*) buf) = r->r_addend;
else if (ELF_R_TYPE(targetnn_to_cpu(r->r_info)) == R_RISCV_32)
*((uint32_t*) buf) = dynsym[ELF_R_SYM(targetnn_to_cpu(r->r_info))].st_value;
*((uint32_t*) buf) = cpu_to_target32(targetnn_to_cpu(dynsym[ELF_R_SYM(targetnn_to_cpu(r->r_info))].st_value) + targetnn_to_cpu(r->r_addend));
else if (ELF_R_TYPE(targetnn_to_cpu(r->r_info)) == R_RISCV_64)
*((uint64_t*) buf) = dynsym[ELF_R_SYM(targetnn_to_cpu(r->r_info))].st_value;
*((uint64_t*) buf) = cpu_to_target64(targetnn_to_cpu(dynsym[ELF_R_SYM(targetnn_to_cpu(r->r_info))].st_value) + targetnn_to_cpu(r->r_addend));
}
}
@ -113,6 +115,8 @@ static void prelink_bonn(void *data)
#undef target32_to_cpu
#undef target64_to_cpu
#undef targetnn_to_cpu
#undef cpu_to_target32
#undef cpu_to_target64
#undef CONCAT_IMPL
#undef CONCAT