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[ELF][RISCV] Improve error message for unknown relocations 

Like rLLD354040.
This commit is contained in:
Fangrui Song 2019-12-31 15:06:31 -08:00
parent 26bdc603f7
commit e3e13db714
1 changed files with 14 additions and 15 deletions
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29
lld/ELF/Arch/RISCV.cpp
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@ -188,6 +188,15 @@ RelType RISCV::getDynRel(RelType type) const {
RelExpr RISCV::getRelExpr(const RelType type, const Symbol &s,
const uint8_t *loc) const {
switch (type) {
case R_RISCV_NONE:
return R_NONE;
case R_RISCV_32:
case R_RISCV_64:
case R_RISCV_HI20:
case R_RISCV_LO12_I:
case R_RISCV_LO12_S:
case R_RISCV_RVC_LUI:
return R_ABS;
case R_RISCV_ADD8:
case R_RISCV_ADD16:
case R_RISCV_ADD32:
@ -229,9 +238,11 @@ RelExpr RISCV::getRelExpr(const RelType type, const Symbol &s,
case R_RISCV_RELAX:
case R_RISCV_ALIGN:
case R_RISCV_TPREL_ADD:
return R_HINT;
return R_NONE;
default:
return R_ABS;
error(getErrorLocation(loc) + "unknown relocation (" + Twine(type) +
") against symbol " + toString(s));
return R_NONE;
}
}
@ -423,21 +434,9 @@ void RISCV::relocateOne(uint8_t *loc, const RelType type,
case R_RISCV_ALIGN:
case R_RISCV_RELAX:
return; // Ignored (for now)
case R_RISCV_NONE:
return; // Do nothing
// These are handled by the dynamic linker
case R_RISCV_RELATIVE:
case R_RISCV_COPY:
case R_RISCV_JUMP_SLOT:
// GP-relative relocations are only produced after relaxation, which
// we don't support for now
case R_RISCV_GPREL_I:
case R_RISCV_GPREL_S:
default:
error(getErrorLocation(loc) +
"unimplemented relocation: " + toString(type));
return;
llvm_unreachable("unknown relocation");
}
}