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authorRuss Cox <rsc@golang.org>2014-09-08 00:08:51 -0400
committerRuss Cox <rsc@golang.org>2014-09-08 00:08:51 -0400
commitc007ce824d9a4fccb148f9204e04c23ed2984b71 (patch)
tree7dcac257114ef5c446be5b7b68c27dea230b7c09 /src/runtime/sys_solaris_amd64.s
parent220a6de47eced55956eb8af8d643d4f5b67fd634 (diff)
downloadgo-c007ce824d9a4fccb148f9204e04c23ed2984b71.tar.gz
go-c007ce824d9a4fccb148f9204e04c23ed2984b71.zip
build: move package sources from src/pkg to src
Preparation was in CL 134570043. This CL contains only the effect of 'hg mv src/pkg/* src'. For more about the move, see golang.org/s/go14nopkg.
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+// 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 AMD64, SunOS
+// /usr/include/sys/syscall.h for syscall numbers.
+//
+
+#include "zasm_GOOS_GOARCH.h"
+#include "textflag.h"
+
+// This is needed by asm_amd64.s
+TEXT runtime·settls(SB),NOSPLIT,$8
+ RET
+
+// void libc·miniterrno(void *(*___errno)(void));
+//
+// Set the TLS errno pointer in M.
+//
+// Called using runtime·asmcgocall from os_solaris.c:/minit.
+// NOT USING GO CALLING CONVENTION.
+TEXT runtime·miniterrno(SB),NOSPLIT,$0
+ // asmcgocall will put first argument into DI.
+ CALL DI // SysV ABI so returns in AX
+ get_tls(CX)
+ MOVQ g(CX), BX
+ MOVQ g_m(BX), BX
+ MOVQ AX, m_perrno(BX)
+ RET
+
+// int64 runtime·nanotime1(void);
+//
+// clock_gettime(3c) wrapper because Timespec is too large for
+// runtime·nanotime stack.
+//
+// Called using runtime·sysvicall6 from os_solaris.c:/nanotime.
+// NOT USING GO CALLING CONVENTION.
+TEXT runtime·nanotime1(SB),NOSPLIT,$0
+ // need space for the timespec argument.
+ SUBQ $64, SP // 16 bytes will do, but who knows in the future?
+ MOVQ $3, DI // CLOCK_REALTIME from <sys/time_impl.h>
+ MOVQ SP, SI
+ MOVQ libc·clock_gettime(SB), AX
+ CALL AX
+ MOVQ (SP), AX // tv_sec from struct timespec
+ IMULQ $1000000000, AX // multiply into nanoseconds
+ ADDQ 8(SP), AX // tv_nsec, offset should be stable.
+ ADDQ $64, SP
+ RET
+
+// pipe(3c) wrapper that returns fds in AX, DX.
+// NOT USING GO CALLING CONVENTION.
+TEXT runtime·pipe1(SB),NOSPLIT,$0
+ SUBQ $16, SP // 8 bytes will do, but stack has to be 16-byte alligned
+ MOVQ SP, DI
+ MOVQ libc·pipe(SB), AX
+ CALL AX
+ MOVL 0(SP), AX
+ MOVL 4(SP), DX
+ ADDQ $16, SP
+ RET
+
+// Call a library function with SysV calling conventions.
+// The called function can take a maximum of 6 INTEGER class arguments,
+// see
+// Michael Matz, Jan Hubicka, Andreas Jaeger, and Mark Mitchell
+// System V Application Binary Interface
+// AMD64 Architecture Processor Supplement
+// section 3.2.3.
+//
+// Called by runtime·asmcgocall or runtime·cgocall.
+// NOT USING GO CALLING CONVENTION.
+TEXT runtime·asmsysvicall6(SB),NOSPLIT,$0
+ // asmcgocall will put first argument into DI.
+ PUSHQ DI // save for later
+ MOVQ libcall_fn(DI), AX
+ MOVQ libcall_args(DI), R11
+ MOVQ libcall_n(DI), R10
+
+ get_tls(CX)
+ MOVQ g(CX), BX
+ MOVQ g_m(BX), BX
+ MOVQ m_perrno(BX), DX
+ CMPQ DX, $0
+ JEQ skiperrno1
+ MOVL $0, 0(DX)
+
+skiperrno1:
+ CMPQ R11, $0
+ JEQ skipargs
+ // Load 6 args into correspondent registers.
+ MOVQ 0(R11), DI
+ MOVQ 8(R11), SI
+ MOVQ 16(R11), DX
+ MOVQ 24(R11), CX
+ MOVQ 32(R11), R8
+ MOVQ 40(R11), R9
+skipargs:
+
+ // Call SysV function
+ CALL AX
+
+ // Return result
+ POPQ DI
+ MOVQ AX, libcall_r1(DI)
+ MOVQ DX, libcall_r2(DI)
+
+ get_tls(CX)
+ MOVQ g(CX), BX
+ MOVQ g_m(BX), BX
+ MOVQ m_perrno(BX), AX
+ CMPQ AX, $0
+ JEQ skiperrno2
+ MOVL 0(AX), AX
+ MOVQ AX, libcall_err(DI)
+
+skiperrno2:
+ RET
+
+// uint32 tstart_sysvicall(M *newm);
+TEXT runtime·tstart_sysvicall(SB),NOSPLIT,$0
+ // DI contains first arg newm
+ MOVQ m_g0(DI), DX // g
+
+ // Make TLS entries point at g and m.
+ get_tls(BX)
+ MOVQ DX, g(BX)
+ MOVQ DI, g_m(DX)
+
+ // Layout new m scheduler stack on os stack.
+ MOVQ SP, AX
+ MOVQ AX, g_stackbase(DX)
+ SUBQ $(0x100000), AX // stack size
+ MOVQ AX, g_stackguard(DX)
+ MOVQ AX, g_stackguard0(DX)
+
+ // Someday the convention will be D is always cleared.
+ CLD
+
+ CALL runtime·stackcheck(SB) // clobbers AX,CX
+ CALL runtime·mstart(SB)
+
+ XORL AX, AX // return 0 == success
+ MOVL AX, ret+8(FP)
+ RET
+
+// Careful, this is called by __sighndlr, a libc function. We must preserve
+// registers as per AMD 64 ABI.
+TEXT runtime·sigtramp(SB),NOSPLIT,$0
+ // Note that we are executing on altsigstack here, so we have
+ // more stack available than NOSPLIT would have us believe.
+ // To defeat the linker, we make our own stack frame with
+ // more space:
+ SUBQ $184, SP
+
+ // save registers
+ MOVQ BX, 32(SP)
+ MOVQ BP, 40(SP)
+ MOVQ R12, 48(SP)
+ MOVQ R13, 56(SP)
+ MOVQ R14, 64(SP)
+ MOVQ R15, 72(SP)
+
+ get_tls(BX)
+ // check that g exists
+ MOVQ g(BX), R10
+ CMPQ R10, $0
+ JNE allgood
+ MOVQ DI, 0(SP)
+ MOVQ $runtime·badsignal(SB), AX
+ CALL AX
+ JMP exit
+
+allgood:
+ // save g
+ MOVQ R10, 80(SP)
+
+ // Save m->libcall and m->scratch. We need to do this because we
+ // might get interrupted by a signal in runtime·asmcgocall.
+
+ // save m->libcall
+ MOVQ g_m(R10), BP
+ LEAQ m_libcall(BP), R11
+ MOVQ libcall_fn(R11), R10
+ MOVQ R10, 88(SP)
+ MOVQ libcall_args(R11), R10
+ MOVQ R10, 96(SP)
+ MOVQ libcall_n(R11), R10
+ MOVQ R10, 104(SP)
+ MOVQ libcall_r1(R11), R10
+ MOVQ R10, 168(SP)
+ MOVQ libcall_r2(R11), R10
+ MOVQ R10, 176(SP)
+
+ // save m->scratch
+ LEAQ m_scratch(BP), R11
+ MOVQ 0(R11), R10
+ MOVQ R10, 112(SP)
+ MOVQ 8(R11), R10
+ MOVQ R10, 120(SP)
+ MOVQ 16(R11), R10
+ MOVQ R10, 128(SP)
+ MOVQ 24(R11), R10
+ MOVQ R10, 136(SP)
+ MOVQ 32(R11), R10
+ MOVQ R10, 144(SP)
+ MOVQ 40(R11), R10
+ MOVQ R10, 152(SP)
+
+ // save errno, it might be EINTR; stuff we do here might reset it.
+ MOVQ m_perrno(BP), R10
+ MOVL 0(R10), R10
+ MOVQ R10, 160(SP)
+
+ MOVQ g(BX), R10
+ // g = m->gsignal
+ MOVQ m_gsignal(BP), BP
+ MOVQ BP, g(BX)
+
+ // prepare call
+ MOVQ DI, 0(SP)
+ MOVQ SI, 8(SP)
+ MOVQ DX, 16(SP)
+ MOVQ R10, 24(SP)
+ CALL runtime·sighandler(SB)
+
+ get_tls(BX)
+ MOVQ g(BX), BP
+ MOVQ g_m(BP), BP
+ // restore libcall
+ LEAQ m_libcall(BP), R11
+ MOVQ 88(SP), R10
+ MOVQ R10, libcall_fn(R11)
+ MOVQ 96(SP), R10
+ MOVQ R10, libcall_args(R11)
+ MOVQ 104(SP), R10
+ MOVQ R10, libcall_n(R11)
+ MOVQ 168(SP), R10
+ MOVQ R10, libcall_r1(R11)
+ MOVQ 176(SP), R10
+ MOVQ R10, libcall_r2(R11)
+
+ // restore scratch
+ LEAQ m_scratch(BP), R11
+ MOVQ 112(SP), R10
+ MOVQ R10, 0(R11)
+ MOVQ 120(SP), R10
+ MOVQ R10, 8(R11)
+ MOVQ 128(SP), R10
+ MOVQ R10, 16(R11)
+ MOVQ 136(SP), R10
+ MOVQ R10, 24(R11)
+ MOVQ 144(SP), R10
+ MOVQ R10, 32(R11)
+ MOVQ 152(SP), R10
+ MOVQ R10, 40(R11)
+
+ // restore errno
+ MOVQ m_perrno(BP), R11
+ MOVQ 160(SP), R10
+ MOVL R10, 0(R11)
+
+ // restore g
+ MOVQ 80(SP), R10
+ MOVQ R10, g(BX)
+
+exit:
+ // restore registers
+ MOVQ 32(SP), BX
+ MOVQ 40(SP), BP
+ MOVQ 48(SP), R12
+ MOVQ 56(SP), R13
+ MOVQ 64(SP), R14
+ MOVQ 72(SP), R15
+
+ ADDQ $184, SP
+ RET
+
+// Called from runtime·usleep (Go). Can be called on Go stack, on OS stack,
+// can also be called in cgo callback path without a g->m.
+TEXT runtime·usleep1(SB),NOSPLIT,$0
+ MOVL usec+0(FP), DI
+ MOVQ $runtime·usleep2(SB), AX // to hide from 6l
+
+ // Execute call on m->g0.
+ get_tls(R15)
+ CMPQ R15, $0
+ JE usleep1_noswitch
+
+ MOVQ g(R15), R13
+ CMPQ R13, $0
+ JE usleep1_noswitch
+ MOVQ g_m(R13), R13
+ CMPQ R13, $0
+ JE usleep1_noswitch
+ // TODO(aram): do something about the cpu profiler here.
+
+ MOVQ m_g0(R13), R14
+ CMPQ g(R15), R14
+ JNE usleep1_switch
+ // executing on m->g0 already
+ CALL AX
+ RET
+
+usleep1_switch:
+ // Switch to m->g0 stack and back.
+ MOVQ (g_sched+gobuf_sp)(R14), R14
+ MOVQ SP, -8(R14)
+ LEAQ -8(R14), SP
+ CALL AX
+ MOVQ 0(SP), SP
+ RET
+
+usleep1_noswitch:
+ // Not a Go-managed thread. Do not switch stack.
+ CALL AX
+ RET
+
+// Runs on OS stack. duration (in µs units) is in DI.
+TEXT runtime·usleep2(SB),NOSPLIT,$0
+ MOVQ libc·usleep(SB), AX
+ CALL AX
+ RET
+
+// Runs on OS stack, called from runtime·osyield.
+TEXT runtime·osyield1(SB),NOSPLIT,$0
+ MOVQ libc·sched_yield(SB), AX
+ CALL AX
+ RET
+
+// func now() (sec int64, nsec int32)
+TEXT time·now(SB),NOSPLIT,$8-12
+ CALL runtime·nanotime(SB)
+ MOVQ 0(SP), AX
+
+ // generated code for
+ // func f(x uint64) (uint64, uint64) { return x/1000000000, x%100000000 }
+ // adapted to reduce duplication
+ MOVQ AX, CX
+ MOVQ $1360296554856532783, AX
+ MULQ CX
+ ADDQ CX, DX
+ RCRQ $1, DX
+ SHRQ $29, DX
+ MOVQ DX, sec+0(FP)
+ IMULQ $1000000000, DX
+ SUBQ DX, CX
+ MOVL CX, nsec+8(FP)
+ RET