| // Copyright 2015 The Go Authors. All rights reserved. | |
| // Use of this source code is governed by a BSD-style | |
| // license that can be found in the LICENSE file. | |
| // System calls and other sys.stuff for ARM64, Darwin | |
| // System calls are implemented in libSystem, this file contains | |
| // trampolines that convert from Go to C calling convention. | |
| #include "go_asm.h" | |
| #include "go_tls.h" | |
| #include "textflag.h" | |
| TEXT notok<>(SB),NOSPLIT,$0 | |
| MOVD $0, R8 | |
| MOVD R8, (R8) | |
| B 0(PC) | |
| TEXT runtime·open_trampoline(SB),NOSPLIT,$0 | |
| MOVW 8(R0), R1 // arg 2 flags | |
| MOVW 12(R0), R2 // arg 3 mode | |
| MOVD 0(R0), R0 // arg 1 pathname | |
| BL libc_open(SB) | |
| RET | |
| TEXT runtime·close_trampoline(SB),NOSPLIT,$0 | |
| MOVW 0(R0), R0 // arg 1 fd | |
| BL libc_close(SB) | |
| RET | |
| TEXT runtime·write_trampoline(SB),NOSPLIT,$0 | |
| MOVD 8(R0), R1 // arg 2 buf | |
| MOVW 16(R0), R2 // arg 3 count | |
| MOVW 0(R0), R0 // arg 1 fd | |
| BL libc_write(SB) | |
| RET | |
| TEXT runtime·read_trampoline(SB),NOSPLIT,$0 | |
| MOVD 8(R0), R1 // arg 2 buf | |
| MOVW 16(R0), R2 // arg 3 count | |
| MOVW 0(R0), R0 // arg 1 fd | |
| BL libc_read(SB) | |
| RET | |
| TEXT runtime·exit_trampoline(SB),NOSPLIT|NOFRAME,$0 | |
| MOVW 0(R0), R0 | |
| BL libc_exit(SB) | |
| MOVD $1234, R0 | |
| MOVD $1002, R1 | |
| MOVD R0, (R1) // fail hard | |
| TEXT runtime·raiseproc_trampoline(SB),NOSPLIT,$0 | |
| MOVD 0(R0), R19 // signal | |
| BL libc_getpid(SB) | |
| // arg 1 pid already in R0 from getpid | |
| MOVD R19, R1 // arg 2 signal | |
| BL libc_kill(SB) | |
| RET | |
| TEXT runtime·mmap_trampoline(SB),NOSPLIT,$0 | |
| MOVD R0, R19 | |
| MOVD 0(R19), R0 // arg 1 addr | |
| MOVD 8(R19), R1 // arg 2 len | |
| MOVW 16(R19), R2 // arg 3 prot | |
| MOVW 20(R19), R3 // arg 4 flags | |
| MOVW 24(R19), R4 // arg 5 fd | |
| MOVW 28(R19), R5 // arg 6 off | |
| BL libc_mmap(SB) | |
| MOVD $0, R1 | |
| MOVD $-1, R2 | |
| CMP R0, R2 | |
| BNE ok | |
| BL libc_error(SB) | |
| MOVW (R0), R1 | |
| MOVD $0, R0 | |
| ok: | |
| MOVD R0, 32(R19) // ret 1 p | |
| MOVD R1, 40(R19) // ret 2 err | |
| RET | |
| TEXT runtime·munmap_trampoline(SB),NOSPLIT,$0 | |
| MOVD 8(R0), R1 // arg 2 len | |
| MOVD 0(R0), R0 // arg 1 addr | |
| BL libc_munmap(SB) | |
| CMP $0, R0 | |
| BEQ 2(PC) | |
| BL notok<>(SB) | |
| RET | |
| TEXT runtime·madvise_trampoline(SB),NOSPLIT,$0 | |
| MOVD 8(R0), R1 // arg 2 len | |
| MOVW 16(R0), R2 // arg 3 advice | |
| MOVD 0(R0), R0 // arg 1 addr | |
| BL libc_madvise(SB) | |
| RET | |
| TEXT runtime·setitimer_trampoline(SB),NOSPLIT,$0 | |
| MOVD 8(R0), R1 // arg 2 new | |
| MOVD 16(R0), R2 // arg 3 old | |
| MOVW 0(R0), R0 // arg 1 which | |
| BL libc_setitimer(SB) | |
| RET | |
| TEXT runtime·walltime_trampoline(SB),NOSPLIT,$0 | |
| // R0 already has *timeval | |
| MOVD $0, R1 // no timezone needed | |
| BL libc_gettimeofday(SB) | |
| RET | |
| GLOBL timebase<>(SB),NOPTR,$(machTimebaseInfo__size) | |
| TEXT runtime·nanotime_trampoline(SB),NOSPLIT,$40 | |
| MOVD R0, R19 | |
| BL libc_mach_absolute_time(SB) | |
| MOVD R0, 0(R19) | |
| MOVW timebase<>+machTimebaseInfo_numer(SB), R20 | |
| MOVD $timebase<>+machTimebaseInfo_denom(SB), R21 | |
| LDARW (R21), R21 // atomic read | |
| CMP $0, R21 | |
| BNE initialized | |
| SUB $(machTimebaseInfo__size+15)/16*16, RSP | |
| MOVD RSP, R0 | |
| BL libc_mach_timebase_info(SB) | |
| MOVW machTimebaseInfo_numer(RSP), R20 | |
| MOVW machTimebaseInfo_denom(RSP), R21 | |
| ADD $(machTimebaseInfo__size+15)/16*16, RSP | |
| MOVW R20, timebase<>+machTimebaseInfo_numer(SB) | |
| MOVD $timebase<>+machTimebaseInfo_denom(SB), R22 | |
| STLRW R21, (R22) // atomic write | |
| initialized: | |
| MOVW R20, 8(R19) | |
| MOVW R21, 12(R19) | |
| RET | |
| TEXT runtime·sigfwd(SB),NOSPLIT,$0-32 | |
| MOVW sig+8(FP), R0 | |
| MOVD info+16(FP), R1 | |
| MOVD ctx+24(FP), R2 | |
| MOVD fn+0(FP), R11 | |
| BL (R11) | |
| RET | |
| TEXT runtime·sigtramp(SB),NOSPLIT,$0 | |
| // Reserve space for callee-save registers and arguments. | |
| SUB $(8*16), RSP | |
| // Save callee-save registers. | |
| MOVD R19, (8*4)(RSP) | |
| MOVD R20, (8*5)(RSP) | |
| MOVD R21, (8*6)(RSP) | |
| MOVD R22, (8*7)(RSP) | |
| MOVD R23, (8*8)(RSP) | |
| MOVD R24, (8*9)(RSP) | |
| MOVD R25, (8*10)(RSP) | |
| MOVD R26, (8*11)(RSP) | |
| MOVD R27, (8*12)(RSP) | |
| MOVD g, (8*13)(RSP) | |
| MOVD R29, (8*14)(RSP) | |
| // Save arguments. | |
| MOVW R0, (8*1)(RSP) // sig | |
| MOVD R1, (8*2)(RSP) // info | |
| MOVD R2, (8*3)(RSP) // ctx | |
| // this might be called in external code context, | |
| // where g is not set. | |
| MOVB runtime·iscgo(SB), R0 | |
| CMP $0, R0 | |
| BEQ 2(PC) | |
| BL runtime·load_g(SB) | |
| MOVD RSP, R6 | |
| CMP $0, g | |
| BEQ nog | |
| // iOS always use the main stack to run the signal handler. | |
| // We need to switch to gsignal ourselves. | |
| MOVD g_m(g), R11 | |
| MOVD m_gsignal(R11), R5 | |
| MOVD (g_stack+stack_hi)(R5), R6 | |
| nog: | |
| // Restore arguments. | |
| MOVW (8*1)(RSP), R0 | |
| MOVD (8*2)(RSP), R1 | |
| MOVD (8*3)(RSP), R2 | |
| // Reserve space for args and the stack pointer on the | |
| // gsignal stack. | |
| SUB $48, R6 | |
| // Save stack pointer. | |
| MOVD RSP, R4 | |
| MOVD R4, (8*4)(R6) | |
| // Switch to gsignal stack. | |
| MOVD R6, RSP | |
| // Call sigtrampgo. | |
| MOVW R0, (8*1)(RSP) | |
| MOVD R1, (8*2)(RSP) | |
| MOVD R2, (8*3)(RSP) | |
| MOVD $runtime·sigtrampgo(SB), R11 | |
| BL (R11) | |
| // Switch to old stack. | |
| MOVD (8*4)(RSP), R5 | |
| MOVD R5, RSP | |
| // Restore callee-save registers. | |
| MOVD (8*4)(RSP), R19 | |
| MOVD (8*5)(RSP), R20 | |
| MOVD (8*6)(RSP), R21 | |
| MOVD (8*7)(RSP), R22 | |
| MOVD (8*8)(RSP), R23 | |
| MOVD (8*9)(RSP), R24 | |
| MOVD (8*10)(RSP), R25 | |
| MOVD (8*11)(RSP), R26 | |
| MOVD (8*12)(RSP), R27 | |
| MOVD (8*13)(RSP), g | |
| MOVD (8*14)(RSP), R29 | |
| ADD $(8*16), RSP | |
| RET | |
| TEXT runtime·cgoSigtramp(SB),NOSPLIT,$0 | |
| JMP runtime·sigtramp(SB) | |
| TEXT runtime·sigprocmask_trampoline(SB),NOSPLIT,$0 | |
| MOVD 8(R0), R1 // arg 2 new | |
| MOVD 16(R0), R2 // arg 3 old | |
| MOVW 0(R0), R0 // arg 1 how | |
| BL libc_pthread_sigmask(SB) | |
| CMP $0, R0 | |
| BEQ 2(PC) | |
| BL notok<>(SB) | |
| RET | |
| TEXT runtime·sigaction_trampoline(SB),NOSPLIT,$0 | |
| MOVD 8(R0), R1 // arg 2 new | |
| MOVD 16(R0), R2 // arg 3 old | |
| MOVW 0(R0), R0 // arg 1 how | |
| BL libc_sigaction(SB) | |
| CMP $0, R0 | |
| BEQ 2(PC) | |
| BL notok<>(SB) | |
| RET | |
| TEXT runtime·usleep_trampoline(SB),NOSPLIT,$0 | |
| MOVW 0(R0), R0 // arg 1 usec | |
| BL libc_usleep(SB) | |
| RET | |
| TEXT runtime·sysctl_trampoline(SB),NOSPLIT,$0 | |
| MOVW 8(R0), R1 // arg 2 miblen | |
| MOVD 16(R0), R2 // arg 3 out | |
| MOVD 24(R0), R3 // arg 4 size | |
| MOVD 32(R0), R4 // arg 5 dst | |
| MOVD 40(R0), R5 // arg 6 ndst | |
| MOVD 0(R0), R0 // arg 1 mib | |
| BL libc_sysctl(SB) | |
| RET | |
| TEXT runtime·kqueue_trampoline(SB),NOSPLIT,$0 | |
| BL libc_kqueue(SB) | |
| RET | |
| TEXT runtime·kevent_trampoline(SB),NOSPLIT,$0 | |
| MOVD 8(R0), R1 // arg 2 keventt | |
| MOVW 16(R0), R2 // arg 3 nch | |
| MOVD 24(R0), R3 // arg 4 ev | |
| MOVW 32(R0), R4 // arg 5 nev | |
| MOVD 40(R0), R5 // arg 6 ts | |
| MOVW 0(R0), R0 // arg 1 kq | |
| BL libc_kevent(SB) | |
| MOVD $-1, R2 | |
| CMP R0, R2 | |
| BNE ok | |
| BL libc_error(SB) | |
| MOVW (R0), R0 // errno | |
| NEG R0, R0 // caller wants it as a negative error code | |
| ok: | |
| RET | |
| TEXT runtime·fcntl_trampoline(SB),NOSPLIT,$0 | |
| MOVW 4(R0), R1 // arg 2 cmd | |
| MOVW 8(R0), R2 // arg 3 arg | |
| MOVW 0(R0), R0 // arg 1 fd | |
| BL libc_fcntl(SB) | |
| RET | |
| // sigaltstack on iOS is not supported and will always | |
| // run the signal handler on the main stack, so our sigtramp has | |
| // to do the stack switch ourselves. | |
| TEXT runtime·sigaltstack_trampoline(SB),NOSPLIT,$0 | |
| MOVW $43, R0 | |
| BL libc_exit(SB) | |
| RET | |
| // Thread related functions | |
| // Note: On darwin/arm64, the runtime always use runtime/cgo to | |
| // create threads, so all thread related functions will just exit with a | |
| // unique status. | |
| TEXT runtime·mstart_stub(SB),NOSPLIT,$0 | |
| MOVW $44, R0 | |
| BL libc_exit(SB) | |
| RET | |
| TEXT runtime·pthread_attr_init_trampoline(SB),NOSPLIT,$0 | |
| MOVW $45, R0 | |
| BL libc_exit(SB) | |
| RET | |
| TEXT runtime·pthread_attr_setstacksize_trampoline(SB),NOSPLIT,$0 | |
| MOVW $46, R0 | |
| BL libc_exit(SB) | |
| RET | |
| TEXT runtime·pthread_attr_setdetachstate_trampoline(SB),NOSPLIT,$0 | |
| MOVW $47, R0 | |
| BL libc_exit(SB) | |
| RET | |
| TEXT runtime·pthread_create_trampoline(SB),NOSPLIT,$0 | |
| MOVW $48, R0 | |
| BL libc_exit(SB) | |
| RET | |
| TEXT runtime·raise_trampoline(SB),NOSPLIT,$0 | |
| MOVW 0(R0), R0 // arg 1 sig | |
| BL libc_raise(SB) | |
| RET | |
| TEXT runtime·pthread_mutex_init_trampoline(SB),NOSPLIT,$0 | |
| MOVD 8(R0), R1 // arg 2 attr | |
| MOVD 0(R0), R0 // arg 1 mutex | |
| BL libc_pthread_mutex_init(SB) | |
| RET | |
| TEXT runtime·pthread_mutex_lock_trampoline(SB),NOSPLIT,$0 | |
| MOVD 0(R0), R0 // arg 1 mutex | |
| BL libc_pthread_mutex_lock(SB) | |
| RET | |
| TEXT runtime·pthread_mutex_unlock_trampoline(SB),NOSPLIT,$0 | |
| MOVD 0(R0), R0 // arg 1 mutex | |
| BL libc_pthread_mutex_unlock(SB) | |
| RET | |
| TEXT runtime·pthread_cond_init_trampoline(SB),NOSPLIT,$0 | |
| MOVD 8(R0), R1 // arg 2 attr | |
| MOVD 0(R0), R0 // arg 1 cond | |
| BL libc_pthread_cond_init(SB) | |
| RET | |
| TEXT runtime·pthread_cond_wait_trampoline(SB),NOSPLIT,$0 | |
| MOVD 8(R0), R1 // arg 2 mutex | |
| MOVD 0(R0), R0 // arg 1 cond | |
| BL libc_pthread_cond_wait(SB) | |
| RET | |
| TEXT runtime·pthread_cond_timedwait_relative_np_trampoline(SB),NOSPLIT,$0 | |
| MOVD 8(R0), R1 // arg 2 mutex | |
| MOVD 16(R0), R2 // arg 3 timeout | |
| MOVD 0(R0), R0 // arg 1 cond | |
| BL libc_pthread_cond_timedwait_relative_np(SB) | |
| RET | |
| TEXT runtime·pthread_cond_signal_trampoline(SB),NOSPLIT,$0 | |
| MOVD 0(R0), R0 // arg 1 cond | |
| BL libc_pthread_cond_signal(SB) | |
| RET | |