| // Copyright 2009 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, Linux |
| // |
| |
| #include "go_asm.h" |
| #include "go_tls.h" |
| #include "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_gettimeofday (SYS_BASE + 78) |
| #define SYS_clone (SYS_BASE + 120) |
| #define SYS_rt_sigreturn (SYS_BASE + 173) |
| #define SYS_rt_sigaction (SYS_BASE + 174) |
| #define SYS_rt_sigprocmask (SYS_BASE + 175) |
| #define SYS_sigaltstack (SYS_BASE + 186) |
| #define SYS_mmap2 (SYS_BASE + 192) |
| #define SYS_futex (SYS_BASE + 240) |
| #define SYS_exit_group (SYS_BASE + 248) |
| #define SYS_munmap (SYS_BASE + 91) |
| #define SYS_madvise (SYS_BASE + 220) |
| #define SYS_setitimer (SYS_BASE + 104) |
| #define SYS_mincore (SYS_BASE + 219) |
| #define SYS_gettid (SYS_BASE + 224) |
| #define SYS_tkill (SYS_BASE + 238) |
| #define SYS_sched_yield (SYS_BASE + 158) |
| #define SYS_select (SYS_BASE + 142) // newselect |
| #define SYS_ugetrlimit (SYS_BASE + 191) |
| #define SYS_sched_getaffinity (SYS_BASE + 242) |
| #define SYS_clock_gettime (SYS_BASE + 263) |
| #define SYS_epoll_create (SYS_BASE + 250) |
| #define SYS_epoll_ctl (SYS_BASE + 251) |
| #define SYS_epoll_wait (SYS_BASE + 252) |
| #define SYS_epoll_create1 (SYS_BASE + 357) |
| #define SYS_fcntl (SYS_BASE + 55) |
| |
| #define ARM_BASE (SYS_BASE + 0x0f0000) |
| |
| TEXT runtime·open(SB),NOSPLIT,$0 |
| MOVW 0(FP), R0 |
| MOVW 4(FP), R1 |
| MOVW 8(FP), R2 |
| MOVW $SYS_open, R7 |
| SWI $0 |
| MOVW R0, ret+12(FP) |
| RET |
| |
| TEXT runtime·close(SB),NOSPLIT,$0 |
| MOVW 0(FP), R0 |
| MOVW $SYS_close, R7 |
| SWI $0 |
| MOVW R0, ret+4(FP) |
| RET |
| |
| TEXT runtime·write(SB),NOSPLIT,$0 |
| MOVW 0(FP), R0 |
| MOVW 4(FP), R1 |
| MOVW 8(FP), R2 |
| MOVW $SYS_write, R7 |
| SWI $0 |
| MOVW R0, ret+12(FP) |
| RET |
| |
| TEXT runtime·read(SB),NOSPLIT,$0 |
| MOVW 0(FP), R0 |
| MOVW 4(FP), R1 |
| MOVW 8(FP), R2 |
| MOVW $SYS_read, R7 |
| SWI $0 |
| MOVW R0, ret+12(FP) |
| RET |
| |
| TEXT runtime·getrlimit(SB),NOSPLIT,$0 |
| MOVW 0(FP), R0 |
| MOVW 4(FP), R1 |
| MOVW $SYS_ugetrlimit, R7 |
| SWI $0 |
| MOVW R0, ret+8(FP) |
| RET |
| |
| TEXT runtime·exit(SB),NOSPLIT,$-4 |
| MOVW 0(FP), R0 |
| MOVW $SYS_exit_group, R7 |
| SWI $0 |
| MOVW $1234, R0 |
| MOVW $1002, R1 |
| MOVW R0, (R1) // fail hard |
| |
| TEXT runtime·exit1(SB),NOSPLIT,$-4 |
| MOVW 0(FP), R0 |
| MOVW $SYS_exit, R7 |
| SWI $0 |
| MOVW $1234, R0 |
| MOVW $1003, R1 |
| MOVW R0, (R1) // fail hard |
| |
| TEXT runtime·raise(SB),NOSPLIT,$-4 |
| MOVW $SYS_gettid, R7 |
| SWI $0 |
| // arg 1 tid already in R0 from gettid |
| MOVW sig+0(FP), R1 // arg 2 - signal |
| MOVW $SYS_tkill, R7 |
| SWI $0 |
| RET |
| |
| TEXT runtime·mmap(SB),NOSPLIT,$0 |
| MOVW 0(FP), R0 |
| MOVW 4(FP), R1 |
| MOVW 8(FP), R2 |
| MOVW 12(FP), R3 |
| MOVW 16(FP), R4 |
| MOVW 20(FP), R5 |
| MOVW $SYS_mmap2, R7 |
| SWI $0 |
| MOVW $0xfffff001, R6 |
| CMP R6, R0 |
| RSB.HI $0, R0 |
| MOVW R0, ret+24(FP) |
| RET |
| |
| TEXT runtime·munmap(SB),NOSPLIT,$0 |
| MOVW 0(FP), R0 |
| MOVW 4(FP), R1 |
| MOVW $SYS_munmap, R7 |
| SWI $0 |
| MOVW $0xfffff001, R6 |
| CMP R6, R0 |
| MOVW.HI $0, R8 // crash on syscall failure |
| MOVW.HI R8, (R8) |
| RET |
| |
| TEXT runtime·madvise(SB),NOSPLIT,$0 |
| MOVW 0(FP), R0 |
| MOVW 4(FP), R1 |
| MOVW 8(FP), R2 |
| MOVW $SYS_madvise, R7 |
| SWI $0 |
| // ignore failure - maybe pages are locked |
| RET |
| |
| TEXT runtime·setitimer(SB),NOSPLIT,$0 |
| MOVW 0(FP), R0 |
| MOVW 4(FP), R1 |
| MOVW 8(FP), R2 |
| MOVW $SYS_setitimer, R7 |
| SWI $0 |
| RET |
| |
| TEXT runtime·mincore(SB),NOSPLIT,$0 |
| MOVW 0(FP), R0 |
| MOVW 4(FP), R1 |
| MOVW 8(FP), R2 |
| MOVW $SYS_mincore, R7 |
| SWI $0 |
| MOVW R0, ret+12(FP) |
| RET |
| |
| TEXT time·now(SB), NOSPLIT, $32 |
| MOVW $0, R0 // CLOCK_REALTIME |
| MOVW $8(R13), R1 // timespec |
| MOVW $SYS_clock_gettime, R7 |
| SWI $0 |
| |
| MOVW 8(R13), R0 // sec |
| MOVW 12(R13), R2 // nsec |
| |
| MOVW R0, 0(FP) |
| MOVW $0, R1 |
| MOVW R1, 4(FP) |
| MOVW R2, 8(FP) |
| RET |
| |
| // int64 nanotime(void) |
| TEXT runtime·nanotime(SB),NOSPLIT,$32 |
| MOVW $1, R0 // CLOCK_MONOTONIC |
| MOVW $8(R13), R1 // timespec |
| MOVW $SYS_clock_gettime, R7 |
| SWI $0 |
| |
| MOVW 8(R13), R0 // sec |
| MOVW 12(R13), R2 // nsec |
| |
| MOVW $1000000000, R3 |
| MULLU R0, R3, (R1, R0) |
| MOVW $0, R4 |
| ADD.S R2, R0 |
| ADC R4, R1 |
| |
| MOVW R0, ret_lo+0(FP) |
| MOVW R1, ret_hi+4(FP) |
| RET |
| |
| // int32 futex(int32 *uaddr, int32 op, int32 val, |
| // struct timespec *timeout, int32 *uaddr2, int32 val2); |
| TEXT runtime·futex(SB),NOSPLIT,$0 |
| MOVW 4(SP), R0 |
| MOVW 8(SP), R1 |
| MOVW 12(SP), R2 |
| MOVW 16(SP), R3 |
| MOVW 20(SP), R4 |
| MOVW 24(SP), R5 |
| MOVW $SYS_futex, R7 |
| SWI $0 |
| MOVW R0, ret+24(FP) |
| RET |
| |
| |
| // int32 clone(int32 flags, void *stack, M *mp, G *gp, void (*fn)(void)); |
| TEXT runtime·clone(SB),NOSPLIT,$0 |
| MOVW flags+0(FP), R0 |
| MOVW stk+4(FP), R1 |
| MOVW $0, R2 // parent tid ptr |
| MOVW $0, R3 // tls_val |
| MOVW $0, R4 // child tid ptr |
| MOVW $0, R5 |
| |
| // Copy mp, gp, fn off parent stack for use by child. |
| // TODO(kaib): figure out which registers are clobbered by clone and avoid stack copying |
| MOVW $-16(R1), R1 |
| MOVW mm+8(FP), R6 |
| MOVW R6, 0(R1) |
| MOVW gg+12(FP), R6 |
| MOVW R6, 4(R1) |
| MOVW fn+16(FP), R6 |
| MOVW R6, 8(R1) |
| MOVW $1234, R6 |
| MOVW R6, 12(R1) |
| |
| MOVW $SYS_clone, R7 |
| SWI $0 |
| |
| // In parent, return. |
| CMP $0, R0 |
| BEQ 3(PC) |
| MOVW R0, ret+20(FP) |
| RET |
| |
| // Paranoia: check that SP is as we expect. Use R13 to avoid linker 'fixup' |
| MOVW 12(R13), R0 |
| MOVW $1234, R1 |
| CMP R0, R1 |
| BEQ 2(PC) |
| BL runtime·abort(SB) |
| |
| MOVW 4(R13), g |
| MOVW 0(R13), R8 |
| MOVW R8, g_m(g) |
| |
| // paranoia; check they are not nil |
| MOVW 0(R8), R0 |
| MOVW 0(g), R0 |
| |
| BL runtime·emptyfunc(SB) // fault if stack check is wrong |
| |
| // Initialize m->procid to Linux tid |
| MOVW $SYS_gettid, R7 |
| SWI $0 |
| MOVW g_m(g), R8 |
| MOVW R0, m_procid(R8) |
| |
| // Call fn |
| MOVW 8(R13), R0 |
| MOVW $16(R13), R13 |
| BL (R0) |
| |
| MOVW $0, R0 |
| MOVW R0, 4(R13) |
| BL runtime·exit1(SB) |
| |
| // It shouldn't return |
| MOVW $1234, R0 |
| MOVW $1005, R1 |
| MOVW R0, (R1) |
| |
| TEXT runtime·sigaltstack(SB),NOSPLIT,$0 |
| MOVW 0(FP), R0 |
| MOVW 4(FP), R1 |
| MOVW $SYS_sigaltstack, R7 |
| SWI $0 |
| MOVW $0xfffff001, R6 |
| CMP R6, R0 |
| MOVW.HI $0, R8 // crash on syscall failure |
| MOVW.HI R8, (R8) |
| RET |
| |
| TEXT runtime·sigtramp(SB),NOSPLIT,$24 |
| // this might be called in external code context, |
| // where g is not set. |
| // first save R0, because runtime·load_g will clobber it |
| MOVW R0, 4(R13) |
| MOVB runtime·iscgo(SB), R0 |
| CMP $0, R0 |
| BL.NE runtime·load_g(SB) |
| |
| CMP $0, g |
| BNE 4(PC) |
| // signal number is already prepared in 4(R13) |
| MOVW $runtime·badsignal(SB), R11 |
| BL (R11) |
| RET |
| |
| // save g |
| MOVW g, R3 |
| MOVW g, 20(R13) |
| |
| // g = m->gsignal |
| MOVW g_m(g), R8 |
| MOVW m_gsignal(R8), g |
| |
| // copy arguments for call to sighandler |
| // R0 is already saved above |
| MOVW R1, 8(R13) |
| MOVW R2, 12(R13) |
| MOVW R3, 16(R13) |
| |
| BL runtime·sighandler(SB) |
| |
| // restore g |
| MOVW 20(R13), g |
| |
| RET |
| |
| TEXT runtime·rtsigprocmask(SB),NOSPLIT,$0 |
| MOVW 0(FP), R0 |
| MOVW 4(FP), R1 |
| MOVW 8(FP), R2 |
| MOVW 12(FP), R3 |
| MOVW $SYS_rt_sigprocmask, R7 |
| SWI $0 |
| RET |
| |
| TEXT runtime·rt_sigaction(SB),NOSPLIT,$0 |
| MOVW 0(FP), R0 |
| MOVW 4(FP), R1 |
| MOVW 8(FP), R2 |
| MOVW 12(FP), R3 |
| MOVW $SYS_rt_sigaction, R7 |
| SWI $0 |
| MOVW R0, ret+16(FP) |
| RET |
| |
| TEXT runtime·usleep(SB),NOSPLIT,$12 |
| MOVW usec+0(FP), R0 |
| MOVW R0, R1 |
| MOVW $1000000, R2 |
| DIV R2, R0 |
| MOD R2, R1 |
| MOVW R0, 4(SP) |
| MOVW R1, 8(SP) |
| MOVW $0, R0 |
| MOVW $0, R1 |
| MOVW $0, R2 |
| MOVW $0, R3 |
| MOVW $4(SP), R4 |
| MOVW $SYS_select, R7 |
| SWI $0 |
| RET |
| |
| // Use kernel version instead of native armcas in asm_arm.s. |
| // See ../sync/atomic/asm_linux_arm.s for details. |
| TEXT cas<>(SB),NOSPLIT,$0 |
| MOVW $0xffff0fc0, PC |
| |
| TEXT runtime·cas(SB),NOSPLIT,$0 |
| MOVW ptr+0(FP), R2 |
| MOVW old+4(FP), R0 |
| loop: |
| MOVW new+8(FP), R1 |
| BL cas<>(SB) |
| BCC check |
| MOVW $1, R0 |
| MOVB R0, ret+12(FP) |
| RET |
| check: |
| // Kernel lies; double-check. |
| MOVW ptr+0(FP), R2 |
| MOVW old+4(FP), R0 |
| MOVW 0(R2), R3 |
| CMP R0, R3 |
| BEQ loop |
| MOVW $0, R0 |
| MOVB R0, ret+12(FP) |
| RET |
| |
| TEXT runtime·casp1(SB),NOSPLIT,$0 |
| B runtime·cas(SB) |
| |
| TEXT runtime·osyield(SB),NOSPLIT,$0 |
| MOVW $SYS_sched_yield, R7 |
| SWI $0 |
| RET |
| |
| TEXT runtime·sched_getaffinity(SB),NOSPLIT,$0 |
| MOVW 0(FP), R0 |
| MOVW 4(FP), R1 |
| MOVW 8(FP), R2 |
| MOVW $SYS_sched_getaffinity, R7 |
| SWI $0 |
| MOVW R0, ret+12(FP) |
| RET |
| |
| // int32 runtime·epollcreate(int32 size) |
| TEXT runtime·epollcreate(SB),NOSPLIT,$0 |
| MOVW 0(FP), R0 |
| MOVW $SYS_epoll_create, R7 |
| SWI $0 |
| MOVW R0, ret+4(FP) |
| RET |
| |
| // int32 runtime·epollcreate1(int32 flags) |
| TEXT runtime·epollcreate1(SB),NOSPLIT,$0 |
| MOVW 0(FP), R0 |
| MOVW $SYS_epoll_create1, R7 |
| SWI $0 |
| MOVW R0, ret+4(FP) |
| RET |
| |
| // func epollctl(epfd, op, fd int32, ev *epollEvent) int |
| TEXT runtime·epollctl(SB),NOSPLIT,$0 |
| MOVW epfd+0(FP), R0 |
| MOVW op+4(FP), R1 |
| MOVW fd+8(FP), R2 |
| MOVW ev+12(FP), R3 |
| MOVW $SYS_epoll_ctl, R7 |
| SWI $0 |
| MOVW R0, ret+16(FP) |
| RET |
| |
| // int32 runtime·epollwait(int32 epfd, EpollEvent *ev, int32 nev, int32 timeout) |
| TEXT runtime·epollwait(SB),NOSPLIT,$0 |
| MOVW 0(FP), R0 |
| MOVW 4(FP), R1 |
| MOVW 8(FP), R2 |
| MOVW 12(FP), R3 |
| MOVW $SYS_epoll_wait, R7 |
| SWI $0 |
| MOVW R0, ret+16(FP) |
| 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 $0 |
| RET |
| |
| // b __kuser_get_tls @ 0xffff0fe0 |
| TEXT runtime·read_tls_fallback(SB),NOSPLIT,$-4 |
| MOVW $0xffff0fe0, R0 |
| B (R0) |
