| // Copyright 2014 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 ARM, Darwin |
| // See http://fxr.watson.org/fxr/source/bsd/kern/syscalls.c?v=xnu-1228 |
| // or /usr/include/sys/syscall.h (on a Mac) for system call numbers. |
| |
| #include "go_asm.h" |
| #include "go_tls.h" |
| #include "textflag.h" |
| |
| // Copied from /usr/include/sys/syscall.h |
| #define SYS_gettimeofday 116 |
| #define SYS_kill 37 |
| #define SYS_getpid 20 |
| #define SYS_pthread_sigmask 329 |
| #define SYS_setitimer 83 |
| #define SYS___sysctl 202 |
| #define SYS_sigaction 46 |
| #define SYS_sigreturn 184 |
| #define SYS_kqueue 362 |
| #define SYS_kevent 363 |
| #define SYS_fcntl 92 |
| |
| TEXT notok<>(SB),NOSPLIT,$0 |
| MOVW $0, R8 |
| MOVW R8, (R8) |
| B 0(PC) |
| |
| TEXT runtime·open_trampoline(SB),NOSPLIT,$0 |
| MOVW 4(R0), R1 // arg 2 mode |
| MOVW 8(R0), R2 // arg 3 perm |
| MOVW 0(R0), R0 // arg 1 name |
| 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 |
| MOVW 4(R0), R1 // arg 2 buf |
| MOVW 8(R0), R2 // arg 3 count |
| MOVW 0(R0), R0 // arg 1 fd |
| BL libc_write(SB) |
| RET |
| |
| TEXT runtime·read_trampoline(SB),NOSPLIT,$0 |
| MOVW 4(R0), R1 // arg 2 buf |
| MOVW 8(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 // arg 0 code |
| BL libc_exit(SB) |
| MOVW $1234, R0 |
| MOVW $1002, R1 |
| MOVW R0, (R1) // fail hard |
| |
| TEXT runtime·raiseproc(SB),NOSPLIT,$24 |
| MOVW $SYS_getpid, R12 |
| SWI $0x80 |
| // arg 1 pid already in R0 from getpid |
| MOVW sig+0(FP), R1 // arg 2 - signal |
| MOVW $1, R2 // arg 3 - posix |
| MOVW $SYS_kill, R12 |
| SWI $0x80 |
| RET |
| |
| TEXT runtime·mmap_trampoline(SB),NOSPLIT,$0 |
| MOVW R0, R8 |
| MOVW 0(R8), R0 // arg 1 addr |
| MOVW 4(R8), R1 // arg 2 len |
| MOVW 8(R8), R2 // arg 3 prot |
| MOVW 12(R8), R3 // arg 4 flags |
| MOVW 16(R8), R4 // arg 5 fid |
| MOVW 20(R8), R5 // arg 6 offset |
| MOVW $0, R6 // off_t is uint64_t |
| // Only R0-R3 are used for arguments, the rest |
| // go on the stack. |
| MOVM.DB.W [R4-R6], (R13) |
| BL libc_mmap(SB) |
| ADD $12, R13 |
| MOVW $0, R1 |
| MOVW $-1, R2 |
| CMP R0, R2 |
| BNE ok |
| BL libc_error(SB) |
| MOVW (R0), R1 |
| MOVW $0, R0 |
| ok: |
| MOVW R0, 24(R8) // ret 1 addr |
| MOVW R1, 28(R8) // ret 2 err |
| RET |
| |
| TEXT runtime·munmap_trampoline(SB),NOSPLIT,$0 |
| MOVW 4(R0), R1 // arg 2 len |
| MOVW 0(R0), R0 // arg 1 addr |
| BL libc_munmap(SB) |
| MOVW $-1, R2 |
| CMP R0, R2 |
| BL.EQ notok<>(SB) |
| RET |
| |
| TEXT runtime·madvise_trampoline(SB),NOSPLIT,$0 |
| MOVW 4(R0), R1 // arg 2 len |
| MOVW 8(R0), R2 // arg 3 advice |
| MOVW 0(R0), R0 // arg 1 addr |
| BL libc_madvise(SB) |
| MOVW $-1, R2 |
| CMP R0, R2 |
| BL.EQ notok<>(SB) |
| RET |
| |
| TEXT runtime·setitimer(SB),NOSPLIT,$0 |
| MOVW mode+0(FP), R0 |
| MOVW new+4(FP), R1 |
| MOVW old+8(FP), R2 |
| MOVW $SYS_setitimer, R12 |
| SWI $0x80 |
| RET |
| |
| TEXT runtime·walltime_trampoline(SB),NOSPLIT,$0 |
| // R0 already has *timeval |
| MOVW $0, R1 // no timezone needed |
| BL libc_gettimeofday(SB) |
| RET |
| |
| GLOBL timebase<>(SB),NOPTR,$(machTimebaseInfo__size) |
| |
| TEXT runtime·nanotime_trampoline(SB),NOSPLIT,$0 |
| MOVW R0, R8 |
| BL libc_mach_absolute_time(SB) |
| MOVW R0, 0(R8) |
| MOVW R1, 4(R8) |
| MOVW timebase<>+machTimebaseInfo_numer(SB), R6 |
| MOVW $timebase<>+machTimebaseInfo_denom(SB), R5 |
| MOVW (R5), R7 |
| DMB MB_ISH // memory barrier for atomic read |
| CMP $0, R7 |
| BNE initialized |
| |
| SUB $(machTimebaseInfo__size+7)/8*8, R13 |
| MOVW R13, R0 |
| BL libc_mach_timebase_info(SB) |
| MOVW machTimebaseInfo_numer(R13), R6 |
| MOVW machTimebaseInfo_denom(R13), R7 |
| ADD $(machTimebaseInfo__size+7)/8*8, R13 |
| |
| MOVW R6, timebase<>+machTimebaseInfo_numer(SB) |
| MOVW $timebase<>+machTimebaseInfo_denom(SB), R5 |
| DMB MB_ISH // memory barrier for atomic write |
| MOVW R7, (R5) |
| DMB MB_ISH |
| |
| initialized: |
| MOVW R6, 8(R8) |
| MOVW R7, 12(R8) |
| RET |
| |
| TEXT runtime·sigfwd(SB),NOSPLIT,$0-16 |
| MOVW sig+4(FP), R0 |
| MOVW info+8(FP), R1 |
| MOVW ctx+12(FP), R2 |
| MOVW fn+0(FP), R11 |
| MOVW R13, R4 |
| SUB $24, R13 |
| BIC $0x7, R13 // alignment for ELF ABI |
| BL (R11) |
| MOVW R4, R13 |
| RET |
| |
| // Sigtramp's job is to call the actual signal handler. |
| // It is called with the following arguments on the stack: |
| // LR "return address" - ignored |
| // R0 actual handler |
| // R1 siginfo style - ignored |
| // R2 signal number |
| // R3 siginfo |
| // -4(FP) context, beware that 0(FP) is the saved LR |
| TEXT runtime·sigtramp(SB),NOSPLIT,$0 |
| // this might be called in external code context, |
| // where g is not set. |
| // first save R0, because runtime·load_g will clobber it |
| MOVM.DB.W [R0], (R13) |
| MOVB runtime·iscgo(SB), R0 |
| CMP $0, R0 |
| BL.NE runtime·load_g(SB) |
| |
| CMP $0, g |
| BNE cont |
| // fake function call stack frame for badsignal |
| // we only need to pass R2 (signal number), but |
| // badsignal will expect R2 at 4(R13), so we also |
| // push R1 onto stack. turns out we do need R1 |
| // to do sigreturn. |
| MOVM.DB.W [R1,R2], (R13) |
| MOVW $runtime·badsignal(SB), R11 |
| BL (R11) |
| MOVM.IA.W [R1], (R13) // saved infostype |
| ADD $(4+4), R13 // +4: also need to remove the pushed R0. |
| MOVW ucontext-4(FP), R0 // load ucontext |
| B ret |
| |
| cont: |
| // Restore R0 |
| MOVM.IA.W (R13), [R0] |
| |
| // NOTE: some Darwin/ARM kernels always use the main stack to run the |
| // signal handler. We need to switch to gsignal ourselves. |
| MOVW g_m(g), R11 |
| MOVW m_gsignal(R11), R5 |
| MOVW (g_stack+stack_hi)(R5), R6 |
| SUB $28, R6 |
| |
| // copy arguments for call to sighandler |
| MOVW R2, 4(R6) // signal num |
| MOVW R3, 8(R6) // signal info |
| MOVW g, 16(R6) // old_g |
| MOVW context-4(FP), R4 |
| MOVW R4, 12(R6) // context |
| |
| // Backup ucontext and infostyle |
| MOVW R4, 20(R6) |
| MOVW R1, 24(R6) |
| |
| // switch stack and g |
| MOVW R6, R13 // sigtramp is not re-entrant, so no need to back up R13. |
| MOVW R5, g |
| |
| BL (R0) |
| |
| // call sigreturn |
| MOVW 20(R13), R0 // saved ucontext |
| MOVW 24(R13), R1 // saved infostyle |
| ret: |
| MOVW $SYS_sigreturn, R12 // sigreturn(ucontext, infostyle) |
| SWI $0x80 |
| |
| // if sigreturn fails, we can do nothing but exit |
| B runtime·exit(SB) |
| |
| TEXT runtime·sigprocmask(SB),NOSPLIT,$0 |
| MOVW how+0(FP), R0 |
| MOVW new+4(FP), R1 |
| MOVW old+8(FP), R2 |
| MOVW $SYS_pthread_sigmask, R12 |
| SWI $0x80 |
| BL.CS notok<>(SB) |
| RET |
| |
| TEXT runtime·sigaction(SB),NOSPLIT,$0 |
| MOVW mode+0(FP), R0 |
| MOVW new+4(FP), R1 |
| MOVW old+8(FP), R2 |
| MOVW $SYS_sigaction, R12 |
| SWI $0x80 |
| RET |
| |
| TEXT runtime·usleep_trampoline(SB),NOSPLIT,$0 |
| MOVW 0(R0), R0 // arg 1 usec |
| BL libc_usleep(SB) |
| RET |
| |
| TEXT ·publicationBarrier(SB),NOSPLIT|NOFRAME,$0-0 |
| B runtime·armPublicationBarrier(SB) |
| |
| TEXT runtime·sysctl(SB),NOSPLIT,$0 |
| MOVW mib+0(FP), R0 |
| MOVW miblen+4(FP), R1 |
| MOVW out+8(FP), R2 |
| MOVW size+12(FP), R3 |
| MOVW dst+16(FP), R4 |
| MOVW ndst+20(FP), R5 |
| MOVW $SYS___sysctl, R12 // syscall entry |
| SWI $0x80 |
| BCC sysctl_ret |
| RSB $0, R0, R0 |
| MOVW R0, ret+24(FP) |
| RET |
| sysctl_ret: |
| MOVW $0, R0 |
| MOVW R0, ret+24(FP) |
| RET |
| |
| // uint32 mach_msg_trap(void*, uint32, uint32, uint32, uint32, uint32, uint32) |
| TEXT runtime·mach_msg_trap(SB),NOSPLIT,$0 |
| MOVW h+0(FP), R0 |
| MOVW op+4(FP), R1 |
| MOVW send_size+8(FP), R2 |
| MOVW rcv_size+12(FP), R3 |
| MOVW rcv_name+16(FP), R4 |
| MOVW timeout+20(FP), R5 |
| MOVW notify+24(FP), R6 |
| MVN $30, R12 |
| SWI $0x80 |
| MOVW R0, ret+28(FP) |
| RET |
| |
| TEXT runtime·mach_task_self(SB),NOSPLIT,$0 |
| MVN $27, R12 // task_self_trap |
| SWI $0x80 |
| MOVW R0, ret+0(FP) |
| RET |
| |
| TEXT runtime·mach_thread_self(SB),NOSPLIT,$0 |
| MVN $26, R12 // thread_self_trap |
| SWI $0x80 |
| MOVW R0, ret+0(FP) |
| RET |
| |
| TEXT runtime·mach_reply_port(SB),NOSPLIT,$0 |
| MVN $25, R12 // mach_reply_port |
| SWI $0x80 |
| MOVW R0, ret+0(FP) |
| RET |
| |
| // Mach provides trap versions of the semaphore ops, |
| // instead of requiring the use of RPC. |
| |
| // uint32 mach_semaphore_wait(uint32) |
| TEXT runtime·mach_semaphore_wait(SB),NOSPLIT,$0 |
| MOVW sema+0(FP), R0 |
| MVN $35, R12 // semaphore_wait_trap |
| SWI $0x80 |
| MOVW R0, ret+4(FP) |
| RET |
| |
| // uint32 mach_semaphore_timedwait(uint32, uint32, uint32) |
| TEXT runtime·mach_semaphore_timedwait(SB),NOSPLIT,$0 |
| MOVW sema+0(FP), R0 |
| MOVW sec+4(FP), R1 |
| MOVW nsec+8(FP), R2 |
| MVN $37, R12 // semaphore_timedwait_trap |
| SWI $0x80 |
| MOVW R0, ret+12(FP) |
| RET |
| |
| // uint32 mach_semaphore_signal(uint32) |
| TEXT runtime·mach_semaphore_signal(SB),NOSPLIT,$0 |
| MOVW sema+0(FP), R0 |
| MVN $32, R12 // semaphore_signal_trap |
| SWI $0x80 |
| MOVW R0, ret+4(FP) |
| RET |
| |
| // uint32 mach_semaphore_signal_all(uint32) |
| TEXT runtime·mach_semaphore_signal_all(SB),NOSPLIT,$0 |
| MOVW sema+0(FP), R0 |
| MVN $33, R12 // semaphore_signal_all_trap |
| SWI $0x80 |
| MOVW R0, ret+4(FP) |
| RET |
| |
| // int32 runtime·kqueue(void) |
| TEXT runtime·kqueue(SB),NOSPLIT,$0 |
| MOVW $SYS_kqueue, R12 |
| SWI $0x80 |
| RSB.CS $0, R0, R0 |
| MOVW R0, ret+0(FP) |
| RET |
| |
| // int32 runtime·kevent(int kq, Kevent *changelist, int nchanges, Kevent *eventlist, int events, Timespec *timeout) |
| TEXT runtime·kevent(SB),NOSPLIT,$0 |
| MOVW $SYS_kevent, R12 |
| MOVW kq+0(FP), R0 |
| MOVW ch+4(FP), R1 |
| MOVW nch+8(FP), R2 |
| MOVW ev+12(FP), R3 |
| MOVW nev+16(FP), R4 |
| MOVW ts+20(FP), R5 |
| SWI $0x80 |
| RSB.CS $0, R0, R0 |
| MOVW R0, ret+24(FP) |
| RET |
| |
| // int32 runtime·closeonexec(int32 fd) |
| TEXT runtime·closeonexec(SB),NOSPLIT,$0 |
| MOVW $SYS_fcntl, R12 |
| MOVW fd+0(FP), R0 |
| MOVW $2, R1 // F_SETFD |
| MOVW $1, R2 // FD_CLOEXEC |
| SWI $0x80 |
| RET |
| |
| // sigaltstack on some darwin/arm version is buggy and will always |
| // run the signal handler on the main stack, so our sigtramp has |
| // to do the stack switch ourselves. |
| TEXT runtime·sigaltstack(SB),NOSPLIT,$0 |
| RET |
| |
| // Thread related functions |
| // Note: On darwin/arm, 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 |
