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