| ... | @@ -389,6 +389,61 @@ fn clone() callconv(.Naked) void { | ... | @@ -389,6 +389,61 @@ fn clone() callconv(.Naked) void { |
| 389 | \\ syscall | 389 | \\ syscall |
| 390 | ); | 390 | ); |
| 391 | }, | 391 | }, |
| | 392 | |
| | 393 | .powerpc64, .powerpc64le => { |
| | 394 | asm volatile ( |
| | 395 | \\ # store non-volatile regs r30, r31 on stack in order to put our |
| | 396 | \\ # start func and its arg there |
| | 397 | \\ stwu 30, -16(1) |
| | 398 | \\ stw 31, 4(1) |
| | 399 | \\ # save r3 (func) into r30, and r6(arg) into r31 |
| | 400 | \\ mr 30, 3 |
| | 401 | \\ mr 31, 6 |
| | 402 | \\ # create initial stack frame for new thread |
| | 403 | \\ clrrwi 4, 4, 4 |
| | 404 | \\ li 0, 0 |
| | 405 | \\ stwu 0, -16(4) |
| | 406 | \\ #move c into first arg |
| | 407 | \\ mr 3, 5 |
| | 408 | \\ mr 5, 7 |
| | 409 | \\ mr 6, 8 |
| | 410 | \\ mr 7, 9 |
| | 411 | \\ # move syscall number into r0 |
| | 412 | \\ li 0, 120 |
| | 413 | \\ sc |
| | 414 | |
| | 415 | \\ # check for syscall error |
| | 416 | \\ bns+ 1f # jump to label 1 if no summary overflow. |
| | 417 | \\ #else |
| | 418 | \\ neg 3, 3 #negate the result (errno) |
| | 419 | \\1: |
| | 420 | \\ # compare sc result with 0 |
| | 421 | \\ cmpwi cr7, 3, 0 |
| | 422 | |
| | 423 | \\ # if not 0, jump to end |
| | 424 | \\ bne cr7, 2f |
| | 425 | |
| | 426 | \\ #else: we're the child |
| | 427 | \\ #call funcptr: move arg (d) into r3 |
| | 428 | \\ mr 3, 31 |
| | 429 | \\ #move r30 (funcptr) into CTR reg |
| | 430 | \\ mtctr 30 |
| | 431 | \\ # call CTR reg |
| | 432 | \\ bctrl |
| | 433 | \\ # mov SYS_exit into r0 (the exit param is already in r3) |
| | 434 | \\ li 0, 1 |
| | 435 | \\ sc |
| | 436 | |
| | 437 | \\2: |
| | 438 | \\ # restore stack |
| | 439 | \\ lwz 30, 0(1) |
| | 440 | \\ lwz 31, 4(1) |
| | 441 | \\ addi 1, 1, 16 |
| | 442 | |
| | 443 | \\ blr |
| | 444 | ); |
| | 445 | }, |
| | 446 | |
| 392 | else => @compileError("Implement clone() for this arch."), | 447 | else => @compileError("Implement clone() for this arch."), |
| 393 | } | 448 | } |
| 394 | } | 449 | } |
Shawn Anastasio <shawn@anastas.io> 2020-06-03 20:55:33-05:00
lib