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<blockquote style="position: relative; padding-left: 55px;"><section><a href="https://mastodon.social/users/whitequark/statuses/114456996231195450">✧✦Catherine✦✧ (whitequark@mastodon.social)'s status on Tuesday, 06-May-2025 04:59:28 JST</a><a href="https://mastodon.social/@whitequark" title="whitequark@mastodon.social"><img src="https://gnusocial.jp/avatar/105710-48-20230309163231.webp" width="48" height="48" alt="✧✦Catherine✦✧" style="position: absolute; left: 0; top: 0;">✧✦Catherine✦✧</a><div><a href="https://mastodon.social/@whitequark/114456682278976948" rel="in-reply-to">in reply to</a></div></section><article><p>one more upsetting comment for the upsetting comment pile</p></article><footer><a rel="bookmark" href="https://gnusocial.jp/conversation/5008503#notice-9817596">In conversation</a><time datetime="2025-05-06T04:59:28+09:00" title="Tuesday, 06-May-2025 04:59:28 JST">about a month ago</time> <span>from <span><a href="https://mastodon.social/@whitequark/114456996231195450" rel="external" title="Sent from mastodon.social via ActivityPub">mastodon.social</a></span></span><a href="https://mastodon.social/@whitequark/114456996231195450">permalink</a><h4>Attachments</h4><ol><li><label><a rel="external" href="https://gnusocial.jp/attachment/4580449">    async def target_single_step(self):
        assert self._is_halted
        # ARM7TDMI has an erratum which causes a watchpoint unit that signals a breakpoint on two
        # consecutive cycles to not flag the second cycle correctly. (ARM7TDMI-S Errata List §5.1)
        # To work around this, we first set up watchpoint unit 1 to trigger on the current PC,
        # and then set up watchpoint unit 0 to trigger on anything but current PC. This makes
        # consecutive single stepping work, but could still fail if unit 1 was used to enter
        # debug mode prior to this call to `.target_single_step()`.</a></label><br><a href="https://files.mastodon.social/media_attachments/files/114/456/994/226/274/587/original/a68a19cc02be8919.png" rel="external">https://files.mastodon.social/media_attachments/files/114/456/994/226/274/587/original/a68a19cc02be8919.png</a></li></ol></footer></blockquote>

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✧✦Catherine✦✧ (whitequark@mastodon.social)'s status on Tuesday, 06-May-2025 04:59:28 JST ✧✦Catherine✦✧
in reply to
one more upsetting comment for the upsetting comment pile
In conversationabout a month ago from mastodon.socialpermalink
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1. async def target_single_step(self): assert self._is_halted # ARM7TDMI has an erratum which causes a watchpoint unit that signals a breakpoint on two # consecutive cycles to not flag the second cycle correctly. (ARM7TDMI-S Errata List §5.1) # To work around this, we first set up watchpoint unit 1 to trigger on the current PC, # and then set up watchpoint unit 0 to trigger on anything but current PC. This makes # consecutive single stepping work, but could still fail if unit 1 was used to enter # debug mode prior to this call to `.target_single_step()`.
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