mirror of
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9c74856af7
currently, only i386 is tested. x86_64 and arm should probably work. the necessary relocation types for mips and microblaze have not been added because I don't understand how they're supposed to work, and I'm not even sure if it's defined yet on microblaze. I may be able to reverse engineer the requirements out of gcc/binutils output.
50 lines
1.1 KiB
C
50 lines
1.1 KiB
C
#include <string.h>
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#include <elf.h>
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#define ETC_LDSO_PATH "/etc/ld-musl-i386.path"
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#define IS_COPY(x) ((x)==R_386_COPY)
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#define IS_PLT(x) ((x)==R_386_JMP_SLOT)
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static inline void do_single_reloc(
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struct dso *self, unsigned char *base_addr,
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size_t *reloc_addr, int type, size_t addend,
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Sym *sym, size_t sym_size,
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struct symdef def, size_t sym_val)
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{
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switch(type) {
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case R_386_32:
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*reloc_addr += sym_val;
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break;
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case R_386_PC32:
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*reloc_addr += sym_val - (size_t)reloc_addr;
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break;
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case R_386_GLOB_DAT:
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case R_386_JMP_SLOT:
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*reloc_addr = sym_val;
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break;
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case R_386_RELATIVE:
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*reloc_addr += (size_t)base_addr;
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break;
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case R_386_COPY:
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memcpy(reloc_addr, (void *)sym_val, sym_size);
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break;
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case R_386_TLS_DTPMOD32:
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*reloc_addr = def.dso ? def.dso->tls_id : self->tls_id;
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break;
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case R_386_TLS_DTPOFF32:
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*reloc_addr = def.sym->st_value;
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break;
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case R_386_TLS_TPOFF:
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*reloc_addr += def.sym
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? def.sym->st_value - def.dso->tls_offset
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: 0 - self->tls_offset;
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break;
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case R_386_TLS_TPOFF32:
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*reloc_addr += def.sym
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? def.dso->tls_offset - def.sym->st_value
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: self->tls_offset;
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break;
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}
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}
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