void RISCVTargetInfo<ELFT>::relocateOne(uint8_t *Loc, uint32_t Type, uint64_t Val);

Tells how to encode result.

Loc: the address to relocate

Type: target specific relocation type

Val: target symbol value (to be detailed later.)

getRelocTargetVA(uint32_t Type, int64_t A, typename ELFT::uint P, const SymbolBody &Body, RelExpr Expr);

Determine target symbol value

Type: target-dependent relocation type

A: addend

P: address of instruction contains this relocation

Body: the symbol used to perform relocation

Expr: target-independent relocation type

example:

for case R_ABS:

return Body.getVA(A); // S + A

for case R_PC:

return Body.getVA(A) - P; // S + A - P

RelExpr RISCVTargetInfo<ELFT>::getRelExpr(uint32_t Type, const SymbolBody &S, const uint8_t *Loc) const ;

classify target-dependent relocation type as target-independent relocation type, so that lld can abstract common operation.