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EPFramebufferSwtcon moved from libqsgepaper.so into xochitl in firmware 3.25, breaking the dlopen/dlsym server path. This adds LD_PRELOAD-based support that hooks into xochitl's statically-linked SWTCON functions. Changes: - Version3.25.cpp: new implementation using malloc/calloc/mmap hooks to redirect the gray buffer to shared memory, then lock → actualUpdate → processAndSignal to drive the framegen thread - Version.cpp: added 3.25 build ID mapping + robust ELF PT_NOTE parsing for build-id discovery (replaces hardcoded address, backward compatible) - PreloadHooks.h: added Mmap to the HOOKS(X) macro - CLAUDE.md: reproduction instructions for future contributors Tested on reMarkable 2 with firmware 3.25.1.1 using yaft terminal emulator with Type Folio keyboard. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Covers SSH access, terminal usage, build/deploy, remote screen verification, debugging, architecture, and address discovery for future firmware versions. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Restores the detailed RE narrative: how addresses were discovered, buffer redirections, update mechanism, ELF build ID parsing, failed approaches, and the terminal helper script. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Rasterize 9,944 glyphs (regular + bold) from JetBrains Mono Nerd Font using a new Python generator script. Covers ASCII, Latin, Greek, Cyrillic, box drawing, block elements, Powerline, and ~5,900 Nerd Font dev icons (Seti-UI, Devicons, Font Awesome, Codicons, etc.). Box drawing characters are post-processed to extend lines to cell edges for seamless connections across terminal cells. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Add keyhotd, a keyboard hotkey daemon that listens for Ctrl+Alt+T on the Type Folio to launch the terminal directly from xochitl. Runs as a systemd service, passively monitors input without grabbing, and guards against double-launch. Also includes yaft glyph regeneration with JetBrains Mono Nerd Font, dirty line tracking improvements, and test infrastructure updates. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Skip e-ink updates for cells that haven't actually changed. tmux and Claude Code TUI frequently repaint unchanged content (status bars, static text), causing unnecessary full-screen e-ink flashes. - Add cells_equal() for field-by-field cell comparison (fast path skips pixmap[] unless has_pixmap is set) - Guard erase_cell, set_cell, copy_cell with comparison checks - Make erase_display shouldClear conditional on actual changes - Scope server-side RGB565→Y8/ARGB32 conversion to dirty rect only (was converting all 2.6M pixels per doUpdate call) - Send single bounding-box doUpdate per frame instead of per-line - Fix existing dirty tracking tests for new skip-unchanged semantics - Add 6 new tests for redundant-write skipping Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Server: when GrayReady flag is set, skip redundant gray buffer write and only convert RGB565→ARGB32 (~30% per-pixel savings). The Y8→ARGB32 fast path was investigated but doesn't work due to canvas rotation mismatch between the unrotated gray buffer and rotated RGB565 layout. yaft: replace per-chunk setState with a 32ms debounce timer. Terminal output is parsed immediately but draws are batched, limiting panel refreshes to ~30/sec. This is the biggest performance win — each e-ink refresh costs 50-250ms, so batching rapid output (e.g. ls, cat) into fewer refreshes saves far more time than pixel conversion optimizations. Infrastructure: add GrayReady=8 UpdateFlag, getGrayCanvas(), expanded shared memory mmap for Y8 buffer, and canvasOffset() helper. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
…low commands Document actualUpdate's ARGB32 dependency, canvas rotation mismatch, GrayReady fast path behavior, e-ink refresh batching strategy, quick build-deploy-test cycle, screenshot script usage, WiFi fallback note, and expanded files-modified table. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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This worked great for me! I mean Claude did all the work, but i've got Claude Code running on my RM2 now, version 3.25.1.1 ... Thank you!! |
Owner
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Nice, I do see some changes that are not related to 3.25 support. |
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Summary
libqsgepaper.sointoxochitl(statically linked)dlopen(libqsgepaper.so)no longer finds the SWTCON implementationVersion.cpp, replacing the hardcoded address (backward compatible with older firmware)What changed in firmware 3.25
In 3.20-3.23,
EPFramebufferSwtconlived inlibqsgepaper.soand the server coulddlopen/dlsymthe update functions. In 3.25, these are statically linked into xochitl.libqsgepaper.sonow only containsEPFramebufferDesktop(a software renderer).The 3.25 build ID is intentionally not mapped for
libqsgepaper.soinVersion.cppso thatServerExefalls through to the LD_PRELOAD path.Files
libs/rm2fb/Versions/Version3.25.cpplock → actualUpdate → processAndSignallibs/rm2fb/Versions/Version.cpplibs/rm2fb/Versions/Version.hversion_3_25_0libs/rm2fb/PreloadHooks.hMmaptoHOOKS(X)macrolibs/rm2fb/CMakeLists.txtVersion3.25.cppto buildCLAUDE.mdTest plan
dbclient)Build
nix build .#dev-crossCross-compiled on aarch64-darwin, deployed via SCP + patchelf.