41 lines
946 B
ArmAsm
41 lines
946 B
ArmAsm
// Copyright (c) 2026 Petr Balvín <opensource@petrbalvin.org> (https://petrbalvin.org)
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// SPDX-License-Identifier: BSD-3-Clause
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// Differential kernel for the riscv64 bookkeeping statements and the
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// slot-relative branches: FUNCDATA and PCDATA (the expanded forms of the
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// funcdata.h macros, contributing no bytes), UNDEF (the toolchain's ebreak),
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// and the JMP N(PC) slot jumps including the self-loop and the backward form.
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#include "textflag.h"
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TEXT ·bookkeep(SB), NOSPLIT, $8-8
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FUNCDATA $1, marks<>(SB)
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PCDATA $1, $-1
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MOV ZERO, ret+0(FP)
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PCDATA $1, $1
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UNDEF
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MOV $1, X10
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RET
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TEXT ·slots(SB), NOSPLIT, $0-0
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MOV $1, X10
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JMP 2(PC)
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MOV $64, X11
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MOV $128, X12
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MOV $2, X11
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MOV $3, X12
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BEQ X10, X11, skip
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JMP -2(PC)
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skip:
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JMP 0(PC)
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TEXT ·marksreader(SB), NOSPLIT, $0-8
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MOV $marks<>(SB), X10
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MOV (X10), X11
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MOV X11, ret+0(FP)
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RET
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GLOBL marks<>(SB), RODATA, $8
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DATA marks<>+0(SB)/8, $1234605616436508552
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