| // Copyright 2012 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, FreeBSD |
| // /usr/src/sys/kern/syscalls.master for syscall numbers. |
| // |
| |
| #include "zasm_GOOS_GOARCH.h" |
| #include "../../cmd/ld/textflag.h" |
| |
| // for EABI, as we don't support OABI |
| #define SYS_BASE 0x0 |
| |
| #define SYS_exit (SYS_BASE + 1) |
| #define SYS_read (SYS_BASE + 3) |
| #define SYS_write (SYS_BASE + 4) |
| #define SYS_open (SYS_BASE + 5) |
| #define SYS_close (SYS_BASE + 6) |
| #define SYS_sigaltstack (SYS_BASE + 53) |
| #define SYS_munmap (SYS_BASE + 73) |
| #define SYS_madvise (SYS_BASE + 75) |
| #define SYS_setitimer (SYS_BASE + 83) |
| #define SYS_fcntl (SYS_BASE + 92) |
| #define SYS_getrlimit (SYS_BASE + 194) |
| #define SYS___sysctl (SYS_BASE + 202) |
| #define SYS_nanosleep (SYS_BASE + 240) |
| #define SYS_clock_gettime (SYS_BASE + 232) |
| #define SYS_sched_yield (SYS_BASE + 331) |
| #define SYS_sigprocmask (SYS_BASE + 340) |
| #define SYS_kqueue (SYS_BASE + 362) |
| #define SYS_kevent (SYS_BASE + 363) |
| #define SYS_sigaction (SYS_BASE + 416) |
| #define SYS_thr_exit (SYS_BASE + 431) |
| #define SYS_thr_self (SYS_BASE + 432) |
| #define SYS_thr_kill (SYS_BASE + 433) |
| #define SYS__umtx_op (SYS_BASE + 454) |
| #define SYS_thr_new (SYS_BASE + 455) |
| #define SYS_mmap (SYS_BASE + 477) |
| |
| TEXT runtime·sys_umtx_op(SB),NOSPLIT,$0 |
| MOVW 0(FP), R0 |
| MOVW 4(FP), R1 |
| MOVW 8(FP), R2 |
| MOVW 12(FP), R3 |
| ADD $20, R13 // arg 5 is passed on stack |
| MOVW $SYS__umtx_op, R7 |
| SWI $0 |
| SUB $20, R13 |
| // BCS error |
| RET |
| |
| TEXT runtime·thr_new(SB),NOSPLIT,$0 |
| MOVW 0(FP), R0 |
| MOVW 4(FP), R1 |
| MOVW $SYS_thr_new, R7 |
| SWI $0 |
| RET |
| |
| TEXT runtime·thr_start(SB),NOSPLIT,$0 |
| MOVW R0, m |
| |
| // set up g |
| MOVW m_g0(m), g |
| BL runtime·emptyfunc(SB) // fault if stack check is wrong |
| BL runtime·mstart(SB) |
| |
| MOVW $2, R8 // crash (not reached) |
| MOVW R8, (R8) |
| RET |
| |
| // Exit the entire program (like C exit) |
| TEXT runtime·exit(SB),NOSPLIT,$-8 |
| MOVW 0(FP), R0 // arg 1 exit status |
| MOVW $SYS_exit, R7 |
| SWI $0 |
| MOVW.CS $0, R8 // crash on syscall failure |
| MOVW.CS R8, (R8) |
| RET |
| |
| TEXT runtime·exit1(SB),NOSPLIT,$-8 |
| MOVW 0(FP), R0 // arg 1 exit status |
| MOVW $SYS_thr_exit, R7 |
| SWI $0 |
| MOVW.CS $0, R8 // crash on syscall failure |
| MOVW.CS R8, (R8) |
| RET |
| |
| TEXT runtime·open(SB),NOSPLIT,$-8 |
| MOVW 0(FP), R0 // arg 1 name |
| MOVW 4(FP), R1 // arg 2 mode |
| MOVW 8(FP), R2 // arg 3 perm |
| MOVW $SYS_open, R7 |
| SWI $0 |
| RET |
| |
| TEXT runtime·read(SB),NOSPLIT,$-8 |
| MOVW 0(FP), R0 // arg 1 fd |
| MOVW 4(FP), R1 // arg 2 buf |
| MOVW 8(FP), R2 // arg 3 count |
| MOVW $SYS_read, R7 |
| SWI $0 |
| RET |
| |
| TEXT runtime·write(SB),NOSPLIT,$-8 |
| MOVW 0(FP), R0 // arg 1 fd |
| MOVW 4(FP), R1 // arg 2 buf |
| MOVW 8(FP), R2 // arg 3 count |
| MOVW $SYS_write, R7 |
| SWI $0 |
| RET |
| |
| TEXT runtime·close(SB),NOSPLIT,$-8 |
| MOVW 0(FP), R0 // arg 1 fd |
| MOVW $SYS_close, R7 |
| SWI $0 |
| RET |
| |
| TEXT runtime·getrlimit(SB),NOSPLIT,$-8 |
| MOVW 0(FP), R0 |
| MOVW 4(FP), R1 |
| MOVW $SYS_getrlimit, R7 |
| SWI $0 |
| RET |
| |
| TEXT runtime·raise(SB),NOSPLIT,$8 |
| // thr_self(&4(R13)) |
| MOVW $4(R13), R0 // arg 1 &4(R13) |
| MOVW $SYS_thr_self, R7 |
| SWI $0 |
| // thr_kill(self, SIGPIPE) |
| MOVW 4(R13), R0 // arg 1 id |
| MOVW sig+0(FP), R1 // arg 2 - signal |
| MOVW $SYS_thr_kill, R7 |
| SWI $0 |
| RET |
| |
| TEXT runtime·setitimer(SB), NOSPLIT, $-8 |
| MOVW 0(FP), R0 |
| MOVW 4(FP), R1 |
| MOVW 8(FP), R2 |
| MOVW $SYS_setitimer, R7 |
| SWI $0 |
| RET |
| |
| // func now() (sec int64, nsec int32) |
| TEXT time·now(SB), NOSPLIT, $32 |
| MOVW $0, R0 // CLOCK_REALTIME |
| MOVW $8(R13), R1 |
| MOVW $SYS_clock_gettime, R7 |
| SWI $0 |
| |
| MOVW 8(R13), R0 // sec.low |
| MOVW 12(R13), R1 // sec.high |
| MOVW 16(R13), R2 // nsec |
| |
| MOVW R0, 0(FP) |
| MOVW R1, 4(FP) |
| MOVW R2, 8(FP) |
| RET |
| |
| // int64 nanotime(void) so really |
| // void nanotime(int64 *nsec) |
| TEXT runtime·nanotime(SB), NOSPLIT, $32 |
| // We can use CLOCK_MONOTONIC_FAST here when we drop |
| // support for FreeBSD 8-STABLE. |
| MOVW $4, R0 // CLOCK_MONOTONIC |
| MOVW $8(R13), R1 |
| MOVW $SYS_clock_gettime, R7 |
| SWI $0 |
| |
| MOVW 8(R13), R0 // sec.low |
| MOVW 12(R13), R4 // sec.high |
| MOVW 16(R13), R2 // nsec |
| |
| MOVW $1000000000, R3 |
| MULLU R0, R3, (R1, R0) |
| MUL R3, R4 |
| ADD.S R2, R0 |
| ADC R4, R1 |
| |
| MOVW 0(FP), R3 |
| MOVW R0, 0(R3) |
| MOVW R1, 4(R3) |
| RET |
| |
| TEXT runtime·sigaction(SB),NOSPLIT,$-8 |
| MOVW 0(FP), R0 // arg 1 sig |
| MOVW 4(FP), R1 // arg 2 act |
| MOVW 8(FP), R2 // arg 3 oact |
| MOVW $SYS_sigaction, R7 |
| SWI $0 |
| MOVW.CS $0, R8 // crash on syscall failure |
| MOVW.CS R8, (R8) |
| RET |
| |
| TEXT runtime·sigtramp(SB),NOSPLIT,$24 |
| // this might be called in external code context, |
| // where g and m are not set. |
| // first save R0, because runtime·load_gm will clobber it |
| MOVW R0, 4(R13) // signum |
| MOVB runtime·iscgo(SB), R0 |
| CMP $0, R0 |
| BL.NE runtime·load_gm(SB) |
| |
| CMP $0, m |
| BNE 4(PC) |
| // signal number is already prepared in 4(R13) |
| MOVW $runtime·badsignal(SB), R11 |
| BL (R11) |
| RET |
| |
| // save g |
| MOVW g, R4 |
| MOVW g, 20(R13) |
| |
| // g = m->signal |
| MOVW m_gsignal(m), g |
| |
| // R0 is already saved |
| MOVW R1, 8(R13) // info |
| MOVW R2, 12(R13) // context |
| MOVW R4, 16(R13) // oldg |
| |
| BL runtime·sighandler(SB) |
| |
| // restore g |
| MOVW 20(R13), g |
| RET |
| |
| TEXT runtime·mmap(SB),NOSPLIT,$16 |
| MOVW 0(FP), R0 // arg 1 addr |
| MOVW 4(FP), R1 // arg 2 len |
| MOVW 8(FP), R2 // arg 3 prot |
| MOVW 12(FP), R3 // arg 4 flags |
| // arg 5 (fid) and arg6 (offset_lo, offset_hi) are passed on stack |
| // note the C runtime only passes the 32-bit offset_lo to us |
| MOVW 16(FP), R4 // arg 5 |
| MOVW R4, 4(R13) |
| MOVW 20(FP), R5 // arg 6 lower 32-bit |
| // the word at 8(R13) is skipped due to 64-bit argument alignment. |
| MOVW R5, 12(R13) |
| MOVW $0, R6 // higher 32-bit for arg 6 |
| MOVW R6, 16(R13) |
| ADD $4, R13 |
| MOVW $SYS_mmap, R7 |
| SWI $0 |
| SUB $4, R13 |
| // TODO(dfc) error checking ? |
| RET |
| |
| TEXT runtime·munmap(SB),NOSPLIT,$0 |
| MOVW 0(FP), R0 // arg 1 addr |
| MOVW 4(FP), R1 // arg 2 len |
| MOVW $SYS_munmap, R7 |
| SWI $0 |
| MOVW.CS $0, R8 // crash on syscall failure |
| MOVW.CS R8, (R8) |
| RET |
| |
| TEXT runtime·madvise(SB),NOSPLIT,$0 |
| MOVW 0(FP), R0 // arg 1 addr |
| MOVW 4(FP), R1 // arg 2 len |
| MOVW 8(FP), R2 // arg 3 flags |
| MOVW $SYS_madvise, R7 |
| SWI $0 |
| // ignore failure - maybe pages are locked |
| RET |
| |
| TEXT runtime·sigaltstack(SB),NOSPLIT,$-8 |
| MOVW new+0(FP), R0 |
| MOVW old+4(FP), R1 |
| MOVW $SYS_sigaltstack, R7 |
| SWI $0 |
| MOVW.CS $0, R8 // crash on syscall failure |
| MOVW.CS R8, (R8) |
| RET |
| |
| TEXT runtime·usleep(SB),NOSPLIT,$16 |
| MOVW usec+0(FP), R0 |
| MOVW R0, R2 |
| MOVW $1000000, R1 |
| DIV R1, R0 |
| // 0(R13) is the saved LR, don't use it |
| MOVW R0, 4(R13) // tv_sec.low |
| MOVW $0, R0 |
| MOVW R0, 8(R13) // tv_sec.high |
| MOD R1, R2 |
| MOVW $1000, R1 |
| MUL R1, R2 |
| MOVW R2, 12(R13) // tv_nsec |
| |
| MOVW $4(R13), R0 // arg 1 - rqtp |
| MOVW $0, R1 // arg 2 - rmtp |
| MOVW $SYS_nanosleep, R7 |
| SWI $0 |
| RET |
| |
| TEXT runtime·sysctl(SB),NOSPLIT,$0 |
| MOVW 0(FP), R0 // arg 1 - name |
| MOVW 4(FP), R1 // arg 2 - namelen |
| MOVW 8(FP), R2 // arg 3 - old |
| MOVW 12(FP), R3 // arg 4 - oldlenp |
| // arg 5 (newp) and arg 6 (newlen) are passed on stack |
| ADD $20, R13 |
| MOVW $SYS___sysctl, R7 |
| SWI $0 |
| SUB.CS $0, R0, R0 |
| SUB $20, R13 |
| RET |
| |
| TEXT runtime·osyield(SB),NOSPLIT,$-4 |
| MOVW $SYS_sched_yield, R7 |
| SWI $0 |
| RET |
| |
| TEXT runtime·sigprocmask(SB),NOSPLIT,$0 |
| MOVW $3, R0 // arg 1 - how (SIG_SETMASK) |
| MOVW 0(FP), R1 // arg 2 - set |
| MOVW 4(FP), R2 // arg 3 - oset |
| MOVW $SYS_sigprocmask, R7 |
| SWI $0 |
| MOVW.CS $0, R8 // crash on syscall failure |
| MOVW.CS R8, (R8) |
| RET |
| |
| // int32 runtime·kqueue(void) |
| TEXT runtime·kqueue(SB),NOSPLIT,$0 |
| MOVW $SYS_kqueue, R7 |
| SWI $0 |
| RSB.CS $0, R0 |
| RET |
| |
| // int32 runtime·kevent(int kq, Kevent *changelist, int nchanges, Kevent *eventlist, int nevents, Timespec *timeout) |
| TEXT runtime·kevent(SB),NOSPLIT,$0 |
| MOVW 0(FP), R0 // kq |
| MOVW 4(FP), R1 // changelist |
| MOVW 8(FP), R2 // nchanges |
| MOVW 12(FP), R3 // eventlist |
| ADD $20, R13 // pass arg 5 and 6 on stack |
| MOVW $SYS_kevent, R7 |
| SWI $0 |
| RSB.CS $0, R0 |
| SUB $20, R13 |
| RET |
| |
| // void runtime·closeonexec(int32 fd) |
| TEXT runtime·closeonexec(SB),NOSPLIT,$0 |
| MOVW 0(FP), R0 // fd |
| MOVW $2, R1 // F_SETFD |
| MOVW $1, R2 // FD_CLOEXEC |
| MOVW $SYS_fcntl, R7 |
| SWI $0 |
| RET |
| |
| TEXT runtime·casp(SB),NOSPLIT,$0 |
| B runtime·cas(SB) |
| |
| // TODO(minux): this is only valid for ARMv6+ |
| // bool armcas(int32 *val, int32 old, int32 new) |
| // Atomically: |
| // if(*val == old){ |
| // *val = new; |
| // return 1; |
| // }else |
| // return 0; |
| TEXT runtime·cas(SB),NOSPLIT,$0 |
| B runtime·armcas(SB) |
| |
| // TODO(minux): this only supports ARMv6K+. |
| TEXT runtime·read_tls_fallback(SB),NOSPLIT,$-4 |
| WORD $0xee1d0f70 // mrc p15, 0, r0, c13, c0, 3 |
| RET |