51 lines
1.8 KiB
Go
51 lines
1.8 KiB
Go
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// 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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//go:build freebsd && riscv64
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package debug
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import "fmt"
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// The architecture has hardware watchpoint triggers, but FreeBSD exposes
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// no PT_GETDBREGS request for riscv64, so there is no supported way to arm
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// one: the watchpoint layer is honestly empty here.
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// WatchpointType selects what triggers the watchpoint.
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type WatchpointType int
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const (
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WatchWrite WatchpointType = 1 // trigger on write
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WatchRead WatchpointType = 3 // trigger on read or write
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)
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// maxWatchpoints reports the number of hardware watchpoint slots the
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// platform provides: FreeBSD exposes none for riscv64.
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func maxWatchpoints() int { return 0 }
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// archStopTrace classifies a TRAP_TRACE stop; with no watchpoint layer a
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// trace stop is always a completed single step.
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func archStopTrace(s *Session, siAddr uint64) (StopReason, uint64) {
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return StopSingleStep, 0
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}
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// FindFreeWatchpointSlot returns -1: no slots exist.
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func (s *Session) FindFreeWatchpointSlot() int { return -1 }
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// IsWatchpointSlotUsed reports whether slot currently holds a watchpoint.
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func (s *Session) IsWatchpointSlotUsed(slot int) bool { return false }
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// SetWatchpoint is unsupported: FreeBSD exposes no debug register request
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// for riscv64.
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func (s *Session) SetWatchpoint(slot int, addr uint64, typ WatchpointType, size int) error {
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return fmt.Errorf("debug: hardware watchpoints are not supported on freebsd/riscv64")
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}
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// ClearWatchpoint is unsupported for the same reason.
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func (s *Session) ClearWatchpoint(slot int) error {
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return fmt.Errorf("debug: hardware watchpoints are not supported on freebsd/riscv64")
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}
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// ClearAllWatchpoints is a no-op: no watchpoint can be armed.
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func (s *Session) ClearAllWatchpoints() error { return nil }
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