| // Copyright 2022 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 "textflag.h" |
| #include "cgo/abi_loong64.h" |
| |
| TEXT _rt0_loong64_linux(SB),NOSPLIT|NOFRAME,$0 |
| // In a statically linked binary, the stack contains argc, |
| // argv as argc string pointers followed by a NULL, envv as a |
| // sequence of string pointers followed by a NULL, and auxv. |
| // There is no TLS base pointer. |
| MOVW 0(R3), R4 // argc |
| ADDV $8, R3, R5 // argv |
| JMP main(SB) |
| |
| // When building with -buildmode=c-shared, this symbol is called when the shared |
| // library is loaded. |
| TEXT _rt0_loong64_linux_lib(SB),NOSPLIT,$168 |
| // Preserve callee-save registers. |
| SAVE_R22_TO_R31(3*8) |
| SAVE_F24_TO_F31(13*8) |
| |
| // Initialize g as nil in case of using g later e.g. sigaction in cgo_sigaction.go |
| MOVV R0, g |
| |
| MOVV R4, _rt0_loong64_linux_lib_argc<>(SB) |
| MOVV R5, _rt0_loong64_linux_lib_argv<>(SB) |
| |
| // Synchronous initialization. |
| MOVV $runtime·libpreinit(SB), R19 |
| JAL (R19) |
| |
| // Create a new thread to do the runtime initialization and return. |
| MOVV _cgo_sys_thread_create(SB), R19 |
| BEQ R19, nocgo |
| MOVV $_rt0_loong64_linux_lib_go(SB), R4 |
| MOVV $0, R5 |
| JAL (R19) |
| JMP restore |
| |
| nocgo: |
| MOVV $0x800000, R4 // stacksize = 8192KB |
| MOVV $_rt0_loong64_linux_lib_go(SB), R5 |
| MOVV R4, 8(R3) |
| MOVV R5, 16(R3) |
| MOVV $runtime·newosproc0(SB), R19 |
| JAL (R19) |
| |
| restore: |
| // Restore callee-save registers. |
| RESTORE_R22_TO_R31(3*8) |
| RESTORE_F24_TO_F31(13*8) |
| RET |
| |
| TEXT _rt0_loong64_linux_lib_go(SB),NOSPLIT,$0 |
| MOVV _rt0_loong64_linux_lib_argc<>(SB), R4 |
| MOVV _rt0_loong64_linux_lib_argv<>(SB), R5 |
| MOVV $runtime·rt0_go(SB),R19 |
| JMP (R19) |
| |
| DATA _rt0_loong64_linux_lib_argc<>(SB)/8, $0 |
| GLOBL _rt0_loong64_linux_lib_argc<>(SB),NOPTR, $8 |
| DATA _rt0_loong64_linux_lib_argv<>(SB)/8, $0 |
| GLOBL _rt0_loong64_linux_lib_argv<>(SB),NOPTR, $8 |
| |
| TEXT main(SB),NOSPLIT|NOFRAME,$0 |
| // in external linking, glibc jumps to main with argc in R4 |
| // and argv in R5 |
| |
| MOVV $runtime·rt0_go(SB), R19 |
| JMP (R19) |
