mirror of
https://github.com/vale981/apheleia
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47 lines
1 KiB
NASM
47 lines
1 KiB
NASM
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# Taken from https: // files.klauspost.com/diff.html
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#include "zasm_GOOS_GOARCH.h"
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#include "funcdata.h"
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#include "textflag.h"
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TEXT runtime·rt0_go(SB), NOSPLIT, $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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ANDQ $~15, SP
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MOVQ AX, 16(SP)
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MOVQ BX, 24(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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MOVQ $runtime·g0(SB), DI
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LEAQ (-64*1024+104)(SP), BX
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MOVQ BX, g_stackguard0(DI)
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MOVQ BX, g_stackguard1(DI)
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MOVQ BX, (g_stack+stack_lo)(DI)
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MOVQ SP, (g_stack+stack_hi)(DI)
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// find out information about the processor we're on
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MOVQ $0, AX
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CPUID
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CMPQ AX, $0
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JE nocpuinfo
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MOVQ $1, AX
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CPUID
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MOVL CX, runtime·cpuid_ecx(SB)
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MOVL DX, runtime·cpuid_edx(SB)
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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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TESTQ AX, AX
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JZ needtls
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// g0 already in DI
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MOVQ DI, CX // Win64 uses CX for first parameter
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MOVQ $setg_gcc<>(SB), SI
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CALL AX
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