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fix(asm): add cross-package GOOBJ resolution for riscv64, loong64, arm64

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Assisted-by: MiMo V2.5 Pro
This commit is contained in:
petrbalvin
2026-08-21 00:35:21 +02:00
parent cc50035375
commit ae550cc05a
4 changed files with 58 additions and 9 deletions
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asm/arm64_assemble.go
+13 -3
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@@ -192,9 +192,9 @@ func encodeARM64Instr(instr *ast.Instr, pc int, offsets map[string]int, fi arm64
}
return a64wordLE(uint32(immFromOperand(ops[0]))), nil
case "B":
return encodeARM64Branch(mnem, ops, pc, offsets, false, resolve)
return encodeARM64Branch(mnem, ops, pc, offsets, false, relocs, resolve)
case "BL", "CALL":
return encodeARM64Branch(mnem, ops, pc, offsets, true, resolve)
return encodeARM64Branch(mnem, ops, pc, offsets, true, relocs, resolve)
case "MOV", "MOVD", "MOVW", "MOVWU", "MOVH", "MOVHU", "MOVB", "MOVBU",
"FMOVS", "FMOVD":
return encodeARM64Mov(instr, mnem, fi, relocs)
@@ -300,7 +300,7 @@ func encodeARM64Instr(instr *ast.Instr, pc int, offsets map[string]int, fi arm64
// ---- branch encoding ----
// encodeARM64Branch encodes an unconditional branch (B/BL) to a label.
func encodeARM64Branch(mnem string, ops []*ast.Operand, pc int, offsets map[string]int, link bool, resolve func(string) string) ([]byte, error) {
func encodeARM64Branch(mnem string, ops []*ast.Operand, pc int, offsets map[string]int, link bool, relocs *[]Reloc, resolve func(string) string) ([]byte, error) {
if len(ops) != 1 {
return nil, fmt.Errorf("%s expects 1 operand, got %d", mnem, len(ops))
}
@@ -308,6 +308,15 @@ func encodeARM64Branch(mnem string, ops []*ast.Operand, pc int, offsets map[stri
// External symbol reference: BL sym(SB).
if link && op.Addr.Sym != nil && op.Addr.Sym.Pseudo == "SB" {
if relocs != nil {
*relocs = append(*relocs, Reloc{
Off: 0,
After: 4,
Name: op.Addr.Sym.Name,
Addend: op.Addr.Sym.Offset,
Kind: RelArm64Branch,
})
}
// Emit BL with zero offset; the linker fills in the target.
return a64wordLE(a64Branch(1, 0)), nil
}
@@ -1324,5 +1333,6 @@ func AssembleFileARM64(f *ast.File) (*Image, error) {
})
}
markExternals(img, dataSyms)
return img, nil
}