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runtime: move loong64 library entry point to os-agnostic file

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The library entry point for loong64 is agnostic to the OS, so move it to
asm_loong64.s. This is similar to what we do for other architectures.

Cq-Include-Trybots: luci.golang.try:gotip-linux-loong64
Change-Id: I6915eb76d3ea72a779e05e78d85f24793169c61f
Reviewed-on: https://go-review.googlesource.com/c/go/+/706416
Reviewed-by: abner chenc <chenguoqi@loongson.cn>
Reviewed-by: Cherry Mui <cherryyz@google.com>
Reviewed-by: Keith Randall <khr@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
This commit is contained in:
qmuntal 2025-09-24 10:34:25 +02:00 • committed by Quim Muntal
parent c9257151e5
commit eb1c7f6e69
2 changed files with 53 additions and 48 deletions
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51
src/runtime/asm_loong64.s
View file

@ -6,6 +6,57 @@
#include "go_tls.h"
#include "funcdata.h"
#include "textflag.h"
#include "cgo/abi_loong64.h"
// When building with -buildmode=c-shared, this symbol is called when the shared
// library is loaded.
TEXT _rt0_loong64_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_lib_argc<>(SB)
MOVV R5, _rt0_loong64_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_lib_go(SB), R4
MOVV $0, R5
JAL (R19)
JMP restore
nocgo:
MOVV $0x800000, R4 // stacksize = 8192KB
MOVV $_rt0_loong64_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_lib_go(SB),NOSPLIT,$0
MOVV _rt0_loong64_lib_argc<>(SB), R4
MOVV _rt0_loong64_lib_argv<>(SB), R5
MOVV $runtime·rt0_go(SB),R19
JMP (R19)
DATA _rt0_loong64_lib_argc<>(SB)/8, $0
GLOBL _rt0_loong64_lib_argc<>(SB),NOPTR, $8
DATA _rt0_loong64_lib_argv<>(SB)/8, $0
GLOBL _rt0_loong64_lib_argv<>(SB),NOPTR, $8
#define REGCTXT R29

50
src/runtime/rt0_linux_loong64.s
View file

@ -3,7 +3,6 @@
// 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,
@ -16,53 +15,8 @@ TEXT _rt0_loong64_linux(SB),NOSPLIT|NOFRAME,$0
// 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 _rt0_loong64_linux_lib(SB),NOSPLIT,$0
JMP _rt0_loong64_lib(SB)
TEXT main(SB),NOSPLIT|NOFRAME,$0
// in external linking, glibc jumps to main with argc in R4