ref: 74d91a0021de012908cfdb35fb61a1473a376130
dir: /lib/sys/syscall+freebsd-x64.s/
.globl sys$syscall sys$syscall: /* 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 %rdi,%rax /* 8(%rsp): hidden type arg */ movq 16(%rsp),%rdi movq 24(%rsp),%rsi movq 32(%rsp),%rdx movq 40(%rsp),%r10 movq 48(%rsp),%r8 movq 56(%rsp),%r9 syscall jae .success negq %rax .success: ret /* * pipe() syscall returns the pipes created in eax:edx, and * needs to copy them to the destination locations manually. */ .globl sys$__freebsd_pipe sys$__freebsd_pipe: movq $0x2a,%rax syscall jae .pipesuccess negq %rax .pipesuccess: movl %eax,(%rdi) movl %edx,4(%rdi) xorq %rax,%rax ret