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| author | Ian Lance Taylor <iant@golang.org> | 2021-04-28 13:06:55 -0700 |
|---|---|---|
| committer | Ian Lance Taylor <iant@golang.org> | 2021-04-29 14:16:19 +0000 |
| commit | b15372f39bb555196053ddac5e86931a1502c86c (patch) | |
| tree | e19b1e56fa4cdc2c6dd2628eaab9430702a8d33e /src/runtime/sys_linux_amd64.s | |
| parent | 862ddb37b4e24bcb89f060d50325c8f863ee99bc (diff) | |
| download | go-b15372f39bb555196053ddac5e86931a1502c86c.tar.gz go-b15372f39bb555196053ddac5e86931a1502c86c.zip | |
runtime: remove linux-amd64 walltime function
It's never called.
Change-Id: I8956743b21301816b5f37a9b34e3f50ef7b2e70a
Reviewed-on: https://go-review.googlesource.com/c/go/+/314771
Trust: Ian Lance Taylor <iant@golang.org>
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Michael Knyszek <mknyszek@google.com>
Diffstat (limited to 'src/runtime/sys_linux_amd64.s')
| -rw-r--r-- | src/runtime/sys_linux_amd64.s | 73 |
1 files changed, 2 insertions, 71 deletions
diff --git a/src/runtime/sys_linux_amd64.s b/src/runtime/sys_linux_amd64.s index ee587de805..33cc670b64 100644 --- a/src/runtime/sys_linux_amd64.s +++ b/src/runtime/sys_linux_amd64.s @@ -204,9 +204,8 @@ TEXT runtime·mincore(SB),NOSPLIT,$0-28 MOVL AX, ret+24(FP) RET -// func walltime() (sec int64, nsec int32) -// non-zero frame-size means bp is saved and restored -TEXT runtime·walltime(SB),NOSPLIT,$16-12 +// func nanotime1() int64 +TEXT runtime·nanotime1(SB),NOSPLIT,$16-8 // We don't know how much stack space the VDSO code will need, // so switch to g0. // In particular, a kernel configured with CONFIG_OPTIMIZE_INLINING=n @@ -232,74 +231,6 @@ TEXT runtime·walltime(SB),NOSPLIT,$16-12 MOVQ CX, 0(SP) MOVQ DX, 8(SP) - LEAQ sec+0(FP), DX - MOVQ -8(DX), CX - MOVQ CX, m_vdsoPC(BX) - MOVQ DX, m_vdsoSP(BX) - -#ifdef GOEXPERIMENT_regabig - CMPQ R14, m_curg(BX) // Only switch if on curg. -#else - CMPQ AX, m_curg(BX) // Only switch if on curg. -#endif - JNE noswitch - - MOVQ m_g0(BX), DX - MOVQ (g_sched+gobuf_sp)(DX), SP // Set SP to g0 stack - -noswitch: - SUBQ $16, SP // Space for results - ANDQ $~15, SP // Align for C code - - MOVL $0, DI // CLOCK_REALTIME - LEAQ 0(SP), SI - MOVQ runtime·vdsoClockgettimeSym(SB), AX - CMPQ AX, $0 - JEQ fallback - CALL AX -ret: - MOVQ 0(SP), AX // sec - MOVQ 8(SP), DX // nsec - MOVQ R12, SP // Restore real SP - // Restore vdsoPC, vdsoSP - // We don't worry about being signaled between the two stores. - // If we are not in a signal handler, we'll restore vdsoSP to 0, - // and no one will care about vdsoPC. If we are in a signal handler, - // we cannot receive another signal. - MOVQ 8(SP), CX - MOVQ CX, m_vdsoSP(BX) - MOVQ 0(SP), CX - MOVQ CX, m_vdsoPC(BX) - MOVQ AX, sec+0(FP) - MOVL DX, nsec+8(FP) - RET -fallback: - MOVQ $SYS_clock_gettime, AX - SYSCALL - JMP ret - -// func nanotime1() int64 -TEXT runtime·nanotime1(SB),NOSPLIT,$16-8 - // Switch to g0 stack. See comment above in runtime·walltime. - - MOVQ SP, R12 // Save old SP; R12 unchanged by C code. - -#ifdef GOEXPERIMENT_regabig - MOVQ g_m(R14), BX // BX unchanged by C code. -#else - get_tls(CX) - MOVQ g(CX), AX - MOVQ g_m(AX), BX // BX unchanged by C code. -#endif - - // Set vdsoPC and vdsoSP for SIGPROF traceback. - // Save the old values on stack and restore them on exit, - // so this function is reentrant. - MOVQ m_vdsoPC(BX), CX - MOVQ m_vdsoSP(BX), DX - MOVQ CX, 0(SP) - MOVQ DX, 8(SP) - LEAQ ret+0(FP), DX MOVQ -8(DX), CX MOVQ CX, m_vdsoPC(BX) |