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* Move to PROGMEM aware libc, allow PSTR in printf() A Newlib (libc) patch is in progress to move the _P functions from inside Arduino into first-class citizens in libc. This Arduino patch cleans up code that's been migrated there. Binaries for the new libs are included because it seems they're part of the Arduino git tree, and should be replaced with @igrr built ones when/if the Newlib changes are accepted. Notable changes/additions for Arduino: Allow for use of PROGMEM based format and parameter strings in all *printf functions. No need for copying PSTR()s into RAM before printing them out (transparently saves heap space when using _P functions) and makes it easier to print out constant strings for applications. Add "%S" (capital-S) format that I've been told, but cannot verify, is used in Arduino to specify a PROGMEM string parameter in printfs, as an alias for "%s" since plain "%s" can now handle PROGMEM. Optimized the memcpy_P, strnlen_P, and strncpy_P functions to use 32-bit direct reads whenver possible (source and dest alignment mediated), but there is still room for improvement in others. Finally, move several constant arrays from RODATA into PROGMEM and update their accessors. Among these are the ctype array, ~260 bytes, mprec* arrays, ~300 bytes, and strings/daycounts in the time formatting functions, ~200 bytes. All told, sketches will see from 300 to 800 additional RAM heap free on startup (depending on their use of these routines). * Fix merge error in #ifdef/#endif * Fix host test using the newlib generic pgmspace.h Host tests now use the sys/pgmspace.h for compiles instead of the ESP8266-specific version. * Update with rebuilt libraries using latest newlib * Include binaries built directly from @igrr repo Rebuild the binaries using a git clone of https://github.com/igrr/newlib-xtensa Build commands for posterity: ```` rm -rf ./xtensa-lx106-elf/ ./configure --prefix=<DIR>/esp8266/tools/sdk/libc --with-newlib \ --enable-multilib --disable-newlib-io-c99-formats \ --disable-newlib-supplied-syscalls \ --enable-newlib-nano-formatted-io --enable-newlib-reent-small \ --enable-target-optspace \ --program-transform-name="s&^&xtensa-lx106-elf-&" \ --disable-option-checking --with-target-subdir=xtensa-lx106-elf \ --target=xtensa-lx106-elf rm -f etc/config.cache CROSS_CFLAGS="-fno-omit-frame-pointer -DSIGNAL_PROVIDED -DABORT_PROVIDED"\ " -DMALLOC_PROVIDED" \ PATH=<DIR>/esp8266/tools/xtensa-lx106-elf/bin/:$PATH \ make all install ```` * Fix merge define conflict in c_types.h * Fix strlen_P misaligned source error Include fix from newlib-xtensa/fix-strlen branch cleaning up misaligned access on a non-aligned source string. * Fix strlen_P and strcpy_P edge cases Ran the included test suite on ESP8266 tstring.c with the following defines: #define MAX_1 50 #define memcmp memcmp_P #define memcpy memcpy_P #define memmem memmem_P #define memchr memchr_P #define strcat strcat_P #define strncat strncat_P #define strcpy strcpy_P #define strlen strlen_P #define strnlen strnlen_P #define strcmp strcmp_P #define strncmp strncmp_P Uncovered edge case and return value problems in the optimized versions of the strnlen_P and strncpy_P functions. Corrected. * Fix memcpy_P return value memcpy-1.c test suite showed error in return value of memcpy_P. Correct it. * Fix strnlen_P/strlen_P off-by-4 error Random crashes, often on String constructors using a PSTR, would occur due to the accelerated strnlen_P going past the end of the string. Would make debug builds fail, too (ESP.getVersionString() failure). Fix to fall through to normal copy on a word that's got a 0 byte anywhere in it. * Add device tests for libc functional verification Add test suite used to debug libc optimized _P functions to the device tests. * Rebuild from igrr's repo (same source as prior) Rebuild .a from igrr's repo at 347260af117b4177389e69fd4d04169b11d87a97 * WIP - add exceptions * Fix exception to have 0-terminator * Move some exception constants to TEXT from RODATA * Remove throw stubs * Move more exception stuff to ROM * Enable exceptions in platform.io * Remove atexit, is duplicated in rebuilt lib Need to look at the quick-toolchain options, there seems to be a definition for atexit defined there (libgcc?) that needs to be excised. For now, remove our local do-nothing copy. * Update libgcc to remove soft-fp functions The esp-quick-toolchain generated libgcc.a needed to have the soft-FP routines that are in ROM removed from it. Remove them in the new esp-quick-toolchain and update. * Fix merge typos in Makefile * Add unhandled exception handler to postmortem * Return our atexit() handler * Latest stdc++, minimize exception emercengy area * Remove atexit from newlib atexit was defined in newlib strongly, but we also define a noop atexit in core. Since we never exit, use the core's noop and delete the atexit from libc.a Updated in esp-quick-toolchain as well. * Move __FUNCTION__ static strings to PROGMEM __FUNCTION__ is unlikely to be a timing sensitive variable, so move it to PROGMEM and not RODATA (RAM) using linker magic. asserts() now should take no RAM for any strings. * Clean up linker file, update to latest stdc++ * Update to latest stdc++ which doesn't call strerror * Update to GCC5.1 exception emergency allocator Using GCC 5.1's emergency memory allocator for exceptions, much less space is required in programs which do not use exceptions and when space is allocated it is managed more efficiently. * Initial try with new compiler toolchain * Include newlib built from esp-quick-toolchain * Update JSON with all new esp-quick-toolchain builds * Use 64bit Windows compiler on 64bit Windows * Dump std::exception.what() when possible When doing the panic on unhandled exceptions, try and grab the .what() pointer and dump it as part of the termination info. Makes it easy to see mem errors (std::bad_alloc) or std::runtime_error strings. * Use scripted install from esp-quick-toolchain Makes sure proper libraries and includes are present by using a scripted installation from esp-quick-install instead of a manual one. * Update eqk to remove atexit, fix packaging diff
Host Tests for Continuous Integration ------------------------------------- make FORCE32=0 OPTZ=-O0 CI (FORCE32=0: https://bugs.launchpad.net/ubuntu/+source/valgrind/+bug/948004) Sketch emulation on host ------------------------ This environment let compile esp8266/Arduino sketches into native environment. Network (tcp, udp, including ssl and multicast) is linked to local host interfaces. WiFi is trivialy emulated and reported as "just" already connected and usable. Currently network emulation is a complete rewrite of WiFiClient+WiFiServer/ClientContext and WifiUdp/UdpContext using socket posix API. Further work will optionally propose native lwIP library instead. How to compile and run a sketch ------------------------------- All results are stored in ./bin/ . Show the core example list: make list Build one example make D=1 ../../libraries/esp8266/examples/Blink/Blink run it: ./bin/Blink/Blink -h Optional 'V=1' enables makefile verbosity Optional 'D=1' enables core debug (same as IDE's tools menu) Optional 'OPTZ=-O2' will update gcc -O option (default is -Os, D=1 implies -O0) Optional 'FORCE32=0' will use native/default gcc (default is FORCE32=1 unless gcc-multilib is not detected) Non exhaustive list of working examples: make D=1 ../../libraries/ESP8266WiFi/examples/udp/udp make D=1 ../../libraries/ESP8266WiFi/examples/WiFiClient/WiFiClient make D=1 ../../libraries/ESP8266WebServer/examples/HelloServer/HelloServer make D=1 ../../libraries/ESP8266WebServer/examples/AdvancedWebServer/AdvancedWebServer make D=1 ../../libraries/ESP8266mDNS/examples/mDNS_Web_Server/mDNS_Web_Server make D=1 ../../libraries/ESP8266WiFi/examples/BearSSL_Validation/BearSSL_Validation Compile other sketches: - library paths are specified using ULIBDIRS variable, separated by ':' - call 'make path-to-the-sketch-file' to build (without its '.ino' extension): - CAVEAT: functions must be declared *before* being called (arduino builder is not around) make D=1 ULIBDIRS=/path/to/your/arduino/libraries/lib1:/path/to/another/place/lib2 /path/to/your/sketchdir/sketch/sketch or: ULIBDIRS=/path/to/your/arduino/libraries/lib1:/path/to/another/place/lib2 make D=1 /path/to/your/sketchdir/sketch/sketch or (preferred): export ULIBDIRS=/path/to/your/arduino/libraries/lib1:/path/to/another/place/lib2 export D=1 export OPTZ=-O2 make clean make /path/to/your/sketchdir/sketch/sketch ./bin/sketch/sketch Executable location is always in bin/. Once a sketch is compiled, just run it: bin/sketch/sketch Options are available: -h -i eth0 bind servers to this interface (WIP) -l bind Multicast to the above interface (WIP) -f no throttle (possibly 100%CPU) TODO ---- A lot. Make fun, propose PRs. - replace some "fprintf(stderr" with redirectable log functions - spiffs in a file (done, need to initialize and check) - EEPROM in a file (partly done) - SDCARD on Host filesystem ? or in an image ? - nice curses interface to display/change gpios ? - display device emulation (like ssd1306) - optionaly use arduino-builder ? - store sketch objects and binaries outside from the source directories (done for sketches) - compile and use lwIP on host - easily debug HTTP classes - https://github.com/esp8266/Arduino/issues/1715 - gpio, currently: read as 0(digital) or 512(analog). output is printed on console.