ref: 1efff8a755b22b20bec7c671c25a63825cfd90f1
dir: /libstd/syscall-osx.s/
.globl _std$syscall _std$syscall: pushq %rbp /* hack: We load 6 args regardless of how many we actually have. This may load junk values, but if the syscall doesn't use them, it's going to be harmless. */ movq 16(%rsp),%rax movq 24(%rsp),%rdi movq 32(%rsp),%rsi movq 40(%rsp),%rdx movq 48(%rsp),%r10 movq 56(%rsp),%r8 movq 64(%rsp),%r9 syscall jae success negq %rax success: popq %rbp ret /* * OSX is dumb about fork, and needs an assembly wrapper. * The fork() syscall, when called directly, returns the pid in both * processes, which means that both parent and child think they're * the parent. * * checking this involves peeking in %edx, so we need to do this in asm. */ .globl _std$__osx_fork _std$__osx_fork: pushq %rbp movq $0x2000002,%rax syscall jae forksuccess negq %rax forksuccess: testl %edx,%edx jz isparent xorq %rax,%rax isparent: popq %rbp ret