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runtime: check GOAMD64 compatibility after setting up TLS
We need TLS set up to be able to print an error without crashing. Fixes #49586 Update #45453 Change-Id: I97f0efcd716a8dca614e82ab73f2d855b7277599 Reviewed-on: https://go-review.googlesource.com/c/go/+/364174 Run-TryBot: Keith Randall <khr@golang.org> TryBot-Result: Go Bot <gobot@golang.org> Reviewed-by: Martin Möhrmann <martin@golang.org> Trust: Martin Möhrmann <martin@golang.org> Trust: Keith Randall <khr@golang.org>
This commit is contained in:
Keith Randall
parent
5e59d6ebd1
commit
01b6cf09fc
@ -145,28 +145,14 @@ GLOBL bad_cpu_msg<>(SB), RODATA, $84
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#endif
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#ifdef GOAMD64_v1
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#define SKIP_GOAMD64_CHECK
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#endif
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#ifndef GOAMD64_v1
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#ifndef GOAMD64_v2
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#ifndef GOAMD64_v3
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#ifndef GOAMD64_v4
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#define SKIP_GOAMD64_CHECK
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#endif
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#endif
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#endif
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#endif
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TEXT runtime·rt0_go(SB),NOSPLIT|TOPFRAME,$0
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// copy arguments forward on an even stack
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MOVQ DI, AX // argc
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MOVQ SI, BX // argv
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SUBQ $(4*8+7), SP // 2args 2auto
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SUBQ $(5*8), SP // 3args 2auto
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ANDQ $~15, SP
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MOVQ AX, 16(SP)
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MOVQ BX, 24(SP)
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MOVQ AX, 24(SP)
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MOVQ BX, 32(SP)
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// create istack out of the given (operating system) stack.
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// _cgo_init may update stackguard.
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@ -181,23 +167,8 @@ TEXT runtime·rt0_go(SB),NOSPLIT|TOPFRAME,$0
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MOVL $0, AX
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CPUID
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CMPL AX, $0
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#ifdef SKIP_GOAMD64_CHECK
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JE nocpuinfo
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#else
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JNE has_cpuinfo
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bad_cpu: // show that the program requires a certain microarchitecture level.
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MOVQ $2, 0(SP)
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MOVQ $bad_cpu_msg<>(SB), AX
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MOVQ AX, 8(SP)
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MOVQ $84, 16(SP)
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CALL runtime·write(SB)
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MOVQ $1, 0(SP)
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CALL runtime·exit(SB)
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CALL runtime·abort(SB)
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#endif
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has_cpuinfo:
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CMPL BX, $0x756E6547 // "Genu"
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JNE notintel
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CMPL DX, $0x49656E69 // "ineI"
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@ -212,44 +183,6 @@ notintel:
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CPUID
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MOVL AX, runtime·processorVersionInfo(SB)
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#ifdef NEED_FEATURES_CX
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ANDL $NEED_FEATURES_CX, CX
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CMPL CX, $NEED_FEATURES_CX
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JNE bad_cpu
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#endif
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#ifdef NEED_MAX_CPUID
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MOVL $0x80000000, AX
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CPUID
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CMPL AX, $NEED_MAX_CPUID
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JL bad_cpu
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#endif
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#ifdef NEED_EXT_FEATURES_BX
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MOVL $7, AX
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MOVL $0, CX
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CPUID
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ANDL $NEED_EXT_FEATURES_BX, BX
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CMPL BX, $NEED_EXT_FEATURES_BX
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JNE bad_cpu
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#endif
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#ifdef NEED_EXT_FEATURES_CX
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MOVL $0x80000001, AX
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CPUID
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ANDL $NEED_EXT_FEATURES_CX, CX
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CMPL CX, $NEED_EXT_FEATURES_CX
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JNE bad_cpu
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#endif
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#ifdef NEED_OS_SUPPORT_AX
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XORL CX, CX
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XGETBV
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ANDL $NEED_OS_SUPPORT_AX, AX
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CMPL AX, $NEED_OS_SUPPORT_AX
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JNE bad_cpu
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#endif
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nocpuinfo:
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// if there is an _cgo_init, call it.
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MOVQ _cgo_init(SB), AX
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@ -330,11 +263,59 @@ ok:
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MOVQ AX, g_m(CX)
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CLD // convention is D is always left cleared
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// Check GOAMD64 reqirements
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// We need to do this after setting up TLS, so that
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// we can report an error if there is a failure. See issue 49586.
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#ifdef NEED_FEATURES_CX
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MOVL $0, AX
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CPUID
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CMPL AX, $0
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JE bad_cpu
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MOVL $1, AX
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CPUID
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ANDL $NEED_FEATURES_CX, CX
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CMPL CX, $NEED_FEATURES_CX
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JNE bad_cpu
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#endif
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#ifdef NEED_MAX_CPUID
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MOVL $0x80000000, AX
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CPUID
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CMPL AX, $NEED_MAX_CPUID
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JL bad_cpu
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#endif
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#ifdef NEED_EXT_FEATURES_BX
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MOVL $7, AX
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MOVL $0, CX
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CPUID
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ANDL $NEED_EXT_FEATURES_BX, BX
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CMPL BX, $NEED_EXT_FEATURES_BX
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JNE bad_cpu
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#endif
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#ifdef NEED_EXT_FEATURES_CX
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MOVL $0x80000001, AX
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CPUID
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ANDL $NEED_EXT_FEATURES_CX, CX
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CMPL CX, $NEED_EXT_FEATURES_CX
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JNE bad_cpu
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#endif
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#ifdef NEED_OS_SUPPORT_AX
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XORL CX, CX
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XGETBV
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ANDL $NEED_OS_SUPPORT_AX, AX
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CMPL AX, $NEED_OS_SUPPORT_AX
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JNE bad_cpu
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#endif
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CALL runtime·check(SB)
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MOVL 16(SP), AX // copy argc
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MOVL 24(SP), AX // copy argc
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MOVL AX, 0(SP)
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MOVQ 24(SP), AX // copy argv
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MOVQ 32(SP), AX // copy argv
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MOVQ AX, 8(SP)
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CALL runtime·args(SB)
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CALL runtime·osinit(SB)
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@ -352,6 +333,17 @@ ok:
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CALL runtime·abort(SB) // mstart should never return
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RET
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bad_cpu: // show that the program requires a certain microarchitecture level.
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MOVQ $2, 0(SP)
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MOVQ $bad_cpu_msg<>(SB), AX
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MOVQ AX, 8(SP)
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MOVQ $84, 16(SP)
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CALL runtime·write(SB)
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MOVQ $1, 0(SP)
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CALL runtime·exit(SB)
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CALL runtime·abort(SB)
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RET
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// Prevent dead-code elimination of debugCallV2, which is
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// intended to be called by debuggers.
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MOVQ $runtime·debugCallV2<ABIInternal>(SB), AX
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