diff --git a/lib/std/special/c.zig b/lib/std/special/c.zig index c769bc358b..13012e16a3 100644 --- a/lib/std/special/c.zig +++ b/lib/std/special/c.zig @@ -389,6 +389,61 @@ fn clone() callconv(.Naked) void { \\ syscall ); }, + + .powerpc64, .powerpc64le => { + asm volatile ( + \\ # store non-volatile regs r30, r31 on stack in order to put our + \\ # start func and its arg there + \\ stwu 30, -16(1) + \\ stw 31, 4(1) + \\ # save r3 (func) into r30, and r6(arg) into r31 + \\ mr 30, 3 + \\ mr 31, 6 + \\ # create initial stack frame for new thread + \\ clrrwi 4, 4, 4 + \\ li 0, 0 + \\ stwu 0, -16(4) + \\ #move c into first arg + \\ mr 3, 5 + \\ mr 5, 7 + \\ mr 6, 8 + \\ mr 7, 9 + \\ # move syscall number into r0 + \\ li 0, 120 + \\ sc + + \\ # check for syscall error + \\ bns+ 1f # jump to label 1 if no summary overflow. + \\ #else + \\ neg 3, 3 #negate the result (errno) + \\1: + \\ # compare sc result with 0 + \\ cmpwi cr7, 3, 0 + + \\ # if not 0, jump to end + \\ bne cr7, 2f + + \\ #else: we're the child + \\ #call funcptr: move arg (d) into r3 + \\ mr 3, 31 + \\ #move r30 (funcptr) into CTR reg + \\ mtctr 30 + \\ # call CTR reg + \\ bctrl + \\ # mov SYS_exit into r0 (the exit param is already in r3) + \\ li 0, 1 + \\ sc + + \\2: + \\ # restore stack + \\ lwz 30, 0(1) + \\ lwz 31, 4(1) + \\ addi 1, 1, 16 + + \\ blr + ); + }, + else => @compileError("Implement clone() for this arch."), } }