| // Copyright 2016 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. |
| |
| #include "go_asm.h" |
| #include "go_tls.h" |
| #include "textflag.h" |
| |
| TEXT runtime·threadinit(SB),NOSPLIT,$0 |
| MOVQ DI, R8 |
| |
| MOVQ m_g0(R8), DX // g |
| MOVQ R8, g_m(DX) |
| |
| // Layout new m scheduler stack on os stack. |
| // TODO: which os stack? do we need to make a new vmo? |
| LEAQ (-8*1024+104)(SP), BX |
| MOVQ BX, g_stackguard0(DX) |
| MOVQ BX, g_stackguard1(DX) |
| MOVQ BX, (g_stack+stack_lo)(DX) |
| MOVQ SP, (g_stack+stack_hi)(DX) |
| |
| PUSHQ R8 |
| |
| // Set up tls. |
| LEAQ m_tls(R8), DI |
| CALL runtime·settls(SB) |
| |
| get_tls(CX) |
| |
| POPQ R8 |
| MOVQ m_g0(R8), DX |
| MOVQ DX, g(CX) |
| |
| CLD // convention is D is always left cleared |
| CALL runtime·stackcheck(SB) // clobbers AX,CX |
| CALL runtime·mstart(SB) |
| // TODO CALL syscall/zx·Sys_zircon_thread_exit(SB) |
| RET |
| |
| // set tls base to DI |
| // Note that this code is only used when CGO_ENABLED=0. |
| // Not using syscall/zx so we can avoid setting up a G. |
| // |
| // TODO: make VSDO call directly here, avoid the syscall. |
| TEXT runtime·settls(SB),NOSPLIT,$8 |
| ADDQ $8, DI // ELF wants to use -8(FS) |
| PUSHQ DI |
| LEAQ 0(SP), DX // prctl on zircon takes a pointer, not the value |
| MOVQ $0, DI |
| MOVQ $0, SI |
| MOVQ $0xff00ff00000035, AX // ZIRCON_SYSCALL_MAGIC | thread_arch_prctl (53) |
| SYSCALL |
| CMPQ AX, $0xfffffffffffff001 |
| JLS 2(PC) |
| MOVL $0xf1, 0xf1 // crash |
| POPQ DI |
| RET |
| |
| TEXT ·cgocallm0(SB),NOSPLIT,$0-20 |
| MOVQ fn+0(FP), AX |
| MOVQ arg+8(FP), DI |
| |
| MOVQ SP, BP // BP is callee-save in the x86-64 ABI |
| |
| ANDQ $~15, SP |
| CALL AX |
| |
| MOVQ BP, SP |
| get_tls(CX) |
| RET |
