Construct a gcc struct matching the gc argument frame. Assumes that in gcc, char is 1 byte, short 2 bytes, int 4 bytes, long long 8 bytes. These assumptions are checked by the gccProlog. Also assumes that gc convention is to word-align the input and output parameters.
(n *Name)
| 343 | // Also assumes that gc convention is to word-align the |
| 344 | // input and output parameters. |
| 345 | func (p *Package) structType(n *Name) (string, int64) { |
| 346 | var buf bytes.Buffer |
| 347 | fmt.Fprint(&buf, "struct {\n") |
| 348 | off := int64(0) |
| 349 | for i, t := range n.FuncType.Params { |
| 350 | if off%t.Align != 0 { |
| 351 | pad := t.Align - off%t.Align |
| 352 | fmt.Fprintf(&buf, "\t\tchar __pad%d[%d];\n", off, pad) |
| 353 | off += pad |
| 354 | } |
| 355 | c := t.Typedef |
| 356 | if c == "" { |
| 357 | c = t.C.String() |
| 358 | } |
| 359 | fmt.Fprintf(&buf, "\t\t%s p%d;\n", c, i) |
| 360 | off += t.Size |
| 361 | } |
| 362 | if off%p.PtrSize != 0 { |
| 363 | pad := p.PtrSize - off%p.PtrSize |
| 364 | fmt.Fprintf(&buf, "\t\tchar __pad%d[%d];\n", off, pad) |
| 365 | off += pad |
| 366 | } |
| 367 | if t := n.FuncType.Result; t != nil { |
| 368 | if off%t.Align != 0 { |
| 369 | pad := t.Align - off%t.Align |
| 370 | fmt.Fprintf(&buf, "\t\tchar __pad%d[%d];\n", off, pad) |
| 371 | off += pad |
| 372 | } |
| 373 | fmt.Fprintf(&buf, "\t\t%s r;\n", t.C) |
| 374 | off += t.Size |
| 375 | } |
| 376 | if off%p.PtrSize != 0 { |
| 377 | pad := p.PtrSize - off%p.PtrSize |
| 378 | fmt.Fprintf(&buf, "\t\tchar __pad%d[%d];\n", off, pad) |
| 379 | off += pad |
| 380 | } |
| 381 | if off == 0 { |
| 382 | fmt.Fprintf(&buf, "\t\tchar unused;\n") // avoid empty struct |
| 383 | } |
| 384 | fmt.Fprintf(&buf, "\t}") |
| 385 | return buf.String(), off |
| 386 | } |
| 387 | |
| 388 | func (p *Package) writeDefsFunc(fgo2 io.Writer, n *Name, callsMalloc *bool) { |
| 389 | name := n.Go |
no test coverage detected