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riscv: tools: Add big endian target support to prelink-riscv 

Signed-off-by: Marcus Comstedt <marcus@mc.pp.se>
Cc: Rick Chen <rick@andestech.com>
Reviewed-by: Rick Chen <rick@andestech.com>
This commit is contained in:
Marcus Comstedt 2019-08-02 19:45:16 +02:00 committed by Andes
parent e604410d3e
commit 4539926a9c
2 changed files with 62 additions and 32 deletions
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32
tools/prelink-riscv.c
View File

@ -47,12 +47,28 @@ const char *argv0;
exit(EXIT_FAILURE); \
} while (0)
#define PRELINK_BYTEORDER le
#define PRELINK_INC_BITS 32
#include "prelink-riscv.inc"
#undef PRELINK_BYTEORDER
#undef PRELINK_INC_BITS
#define PRELINK_BYTEORDER le
#define PRELINK_INC_BITS 64
#include "prelink-riscv.inc"
#undef PRELINK_BYTEORDER
#undef PRELINK_INC_BITS
#define PRELINK_BYTEORDER be
#define PRELINK_INC_BITS 32
#include "prelink-riscv.inc"
#undef PRELINK_BYTEORDER
#undef PRELINK_INC_BITS
#define PRELINK_BYTEORDER be
#define PRELINK_INC_BITS 64
#include "prelink-riscv.inc"
#undef PRELINK_BYTEORDER
#undef PRELINK_INC_BITS
int main(int argc, const char *const *argv)
@ -88,11 +104,19 @@ int main(int argc, const char *const *argv)
die("Invalid ELF file %s", argv[1]);
bool is64 = e_ident[EI_CLASS] == ELFCLASS64;
bool isbe = e_ident[EI_DATA] == ELFDATA2MSB;
if (is64)
prelink64(data);
else
prelink32(data);
if (is64) {
if (isbe)
prelink_be64(data);
else
prelink_le64(data);
} else {
if (isbe)
prelink_be32(data);
else
prelink_le32(data);
}
return 0;
}

62
tools/prelink-riscv.inc
View File

@ -12,9 +12,9 @@
#define CONCAT(x, y) CONCAT_IMPL(x, y)
#define CONCAT3(x, y, z) CONCAT(CONCAT(x, y), z)
#define prelink_nn CONCAT(prelink, PRELINK_INC_BITS)
#define prelink_bonn CONCAT3(prelink_, PRELINK_BYTEORDER, PRELINK_INC_BITS)
#define uintnn_t CONCAT3(uint, PRELINK_INC_BITS, _t)
#define get_offset_nn CONCAT(get_offset_, PRELINK_INC_BITS)
#define get_offset_bonn CONCAT3(get_offset_, PRELINK_BYTEORDER, PRELINK_INC_BITS)
#define Elf_Ehdr CONCAT3(Elf, PRELINK_INC_BITS, _Ehdr)
#define Elf_Phdr CONCAT3(Elf, PRELINK_INC_BITS, _Phdr)
#define Elf_Rela CONCAT3(Elf, PRELINK_INC_BITS, _Rela)
@ -23,35 +23,38 @@
#define Elf_Addr CONCAT3(Elf, PRELINK_INC_BITS, _Addr)
#define ELF_R_TYPE CONCAT3(ELF, PRELINK_INC_BITS, _R_TYPE)
#define ELF_R_SYM CONCAT3(ELF, PRELINK_INC_BITS, _R_SYM)
#define lenn_to_cpu CONCAT3(le, PRELINK_INC_BITS, _to_cpu)
#define target16_to_cpu CONCAT(PRELINK_BYTEORDER, 16_to_cpu)
#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)
static void* get_offset_nn (void* data, Elf_Phdr* phdrs, size_t phnum, Elf_Addr addr)
static void* get_offset_bonn (void* data, Elf_Phdr* phdrs, size_t phnum, Elf_Addr addr)
{
Elf_Phdr *p;
for (p = phdrs; p < phdrs + phnum; ++p)
if (lenn_to_cpu(p->p_vaddr) <= addr && lenn_to_cpu(p->p_vaddr) + lenn_to_cpu(p->p_memsz) > addr)
return data + lenn_to_cpu(p->p_offset) + (addr - lenn_to_cpu(p->p_vaddr));
if (targetnn_to_cpu(p->p_vaddr) <= addr && targetnn_to_cpu(p->p_vaddr) + targetnn_to_cpu(p->p_memsz) > addr)
return data + targetnn_to_cpu(p->p_offset) + (addr - targetnn_to_cpu(p->p_vaddr));
return NULL;
}
static void prelink_nn(void *data)
static void prelink_bonn(void *data)
{
Elf_Ehdr *ehdr = data;
Elf_Phdr *p;
Elf_Dyn *dyn;
Elf_Rela *r;
if (le16_to_cpu(ehdr->e_machine) != EM_RISCV)
if (target16_to_cpu(ehdr->e_machine) != EM_RISCV)
die("Machine type is not RISC-V");
Elf_Phdr *phdrs = data + lenn_to_cpu(ehdr->e_phoff);
Elf_Phdr *phdrs = data + targetnn_to_cpu(ehdr->e_phoff);
Elf_Dyn *dyns = NULL;
for (p = phdrs; p < phdrs + le16_to_cpu(ehdr->e_phnum); ++p) {
if (le32_to_cpu(p->p_type) == PT_DYNAMIC) {
dyns = data + lenn_to_cpu(p->p_offset);
for (p = phdrs; p < phdrs + target16_to_cpu(ehdr->e_phnum); ++p) {
if (target32_to_cpu(p->p_type) == PT_DYNAMIC) {
dyns = data + targetnn_to_cpu(p->p_offset);
break;
}
}
@ -63,14 +66,14 @@ static void prelink_nn(void *data)
size_t rela_count = 0;
Elf_Sym *dynsym = NULL;
for (dyn = dyns;; ++dyn) {
if (lenn_to_cpu(dyn->d_tag) == DT_NULL)
if (targetnn_to_cpu(dyn->d_tag) == DT_NULL)
break;
else if (lenn_to_cpu(dyn->d_tag) == DT_RELA)
rela_dyn = get_offset_nn(data, phdrs, le16_to_cpu(ehdr->e_phnum), + lenn_to_cpu(dyn->d_un.d_ptr));
else if (lenn_to_cpu(dyn->d_tag) == DT_RELASZ)
rela_count = lenn_to_cpu(dyn->d_un.d_val) / sizeof(Elf_Rela);
else if (lenn_to_cpu(dyn->d_tag) == DT_SYMTAB)
dynsym = get_offset_nn(data, phdrs, le16_to_cpu(ehdr->e_phnum), + lenn_to_cpu(dyn->d_un.d_ptr));
else if (targetnn_to_cpu(dyn->d_tag) == DT_RELA)
rela_dyn = get_offset_bonn(data, phdrs, target16_to_cpu(ehdr->e_phnum), + targetnn_to_cpu(dyn->d_un.d_ptr));
else if (targetnn_to_cpu(dyn->d_tag) == DT_RELASZ)
rela_count = targetnn_to_cpu(dyn->d_un.d_val) / sizeof(Elf_Rela);
else if (targetnn_to_cpu(dyn->d_tag) == DT_SYMTAB)
dynsym = get_offset_bonn(data, phdrs, target16_to_cpu(ehdr->e_phnum), + targetnn_to_cpu(dyn->d_un.d_ptr));
}
@ -81,23 +84,23 @@ static void prelink_nn(void *data)
die("No .dynsym found");
for (r = rela_dyn; r < rela_dyn + rela_count; ++r) {
void* buf = get_offset_nn(data, phdrs, le16_to_cpu(ehdr->e_phnum), lenn_to_cpu(r->r_offset));
void* buf = get_offset_bonn(data, phdrs, target16_to_cpu(ehdr->e_phnum), targetnn_to_cpu(r->r_offset));
if (buf == NULL)
continue;
if (ELF_R_TYPE(lenn_to_cpu(r->r_info)) == R_RISCV_RELATIVE)
if (ELF_R_TYPE(targetnn_to_cpu(r->r_info)) == R_RISCV_RELATIVE)
*((uintnn_t*) buf) = r->r_addend;
else if (ELF_R_TYPE(lenn_to_cpu(r->r_info)) == R_RISCV_32)
*((uint32_t*) buf) = dynsym[ELF_R_SYM(lenn_to_cpu(r->r_info))].st_value;
else if (ELF_R_TYPE(lenn_to_cpu(r->r_info)) == R_RISCV_64)
*((uint64_t*) buf) = dynsym[ELF_R_SYM(lenn_to_cpu(r->r_info))].st_value;
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;
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;
}
}
#undef prelink_nn
#undef prelink_bonn
#undef uintnn_t
#undef get_offset_nn
#undef get_offset_bonn
#undef Elf_Ehdr
#undef Elf_Phdr
#undef Elf_Rela
@ -106,7 +109,10 @@ static void prelink_nn(void *data)
#undef Elf_Addr
#undef ELF_R_TYPE
#undef ELF_R_SYM
#undef lenn_to_cpu
#undef target16_to_cpu
#undef target32_to_cpu
#undef target64_to_cpu
#undef targetnn_to_cpu
#undef CONCAT_IMPL
#undef CONCAT