| # | |
| # arch/alpha/pipe.S | |
| # | |
| # | |
| # pipe() on alpha returns both file descriptors in registers -- | |
| # $0 (v0) and $20 (a4) respectively. This is unlike any other system call, | |
| # as far as I can tell. | |
| # | |
| #include <asm/unistd.h> | |
| #include <machine/asm.h> | |
| .text | |
| .align 3 | |
| .type pipe, @function | |
| .ent pipe, 0 | |
| .globl pipe | |
| pipe: | |
| .frame sp,0,ra,0 | |
| lda v0, __NR_pipe | |
| callsys | |
| beq a3, 1f | |
| br pv, 2f # pv <- pc | |
| 2: | |
| ldgp gp, 0(pv) | |
| lda a1, errno | |
| lda v0, -1(zero) | |
| stl a3, 0(a1) | |
| ret zero,(ra),1 | |
| 1: | |
| stl v0, 0(a0) | |
| lda v0, 0 | |
| stl a4, 4(a0) | |
| ret zero,(ra),1 | |
| .size pipe,.-pipe | |
| .end pipe |