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Upgrade to GCC 10.1 toolchain (#6294)
* Upgrade to GCC 9.1 toolchain * Rebuilt using pure GNU binutils and GCC Remove dependencies on earlier forked GNU utilities (gcc-xtensa, binutils-gdb-xtensa) and just use GCC sources, unmodified (except for patches in the esp-quick-toolchain directories). * Rebuild bearssl using new toolchain * Fix GDBstub linkage options GDB works with pure GNU GCC and pure GNU binutils now. Still warnings galore, but tested with the example sketch in the docs. * Fix digitalRead alias warning * Remove gdb stub warnings w/a pragma * Fix deprecated implicit copy ctors in IP code Fix some warnings present in GCC8/9 in the IPAddress code In AddressListIterator there was a copy constructor which simply copied the structure bit-for-bit. That's the default operation, so remove it to avoid the warning there. IPAddress, add a default copy constructor since the other copy constructors are simply parsing from one format into a native ip_addr_t. @d-a-v, can you give these a look over and see if they're good (since IP stuff is really your domain). * Fix AxTLS alias function defs to match real code * Fix WiFiClientSecure implicit default copy ctor These both use shared-ptrs to handle refcnts to allocated data, so using the default copy constructor is fine (and has been in use for a long time). * Dummy size for heap to avoid GCC 8/9 warnings Make GCC think _heap_start is large enough to avoid the basic (and incorrect) bounds-checking warnings it produces. The size chosen is arbitrary and does not affect the actual size of the heap in any way. * Make heap an undefined extend array Instead of a bogus size, use an indefinite size for the heap to avoid GCC warnings * Trivial tab to space fix * Update SDFat to remove FatFile warnings * Fix ticker function cast warnings in GCC 9 The callback function is defined to take a (void*) as parameter, but our templates let users use anything that fits inside sizeof(void*) to be passed in. Add pragmas to stop GCC warnings about this, since we already check the size of the type will fit in the allocated space. * Remove GCC support fcn that's in ROM Manually delete the divdi3.so from the libgcc.a library by running the updated EQT's 9.1-post script. * Make exceptions work again, get std::regex up Exceptions are broken on all builds (GCC4.8-9.1) due to the removal of the PROGMEM non-32b read exception handler (added in the unstable pre3.0.0). Build the exception code with -mforce-l32 and patch accordingly to avoid LoadStore errors. Apply patches to select portions of the regex lib which use _stype_ (which is now in flash). * Rebuild Bearssl using latest GCC push * Automate building of BearSSL and LWIP w/new toolchain * Workaround g++ template section problem for exception strings G++ seems to throw out the section attributes for templates. This means that the __EXCSTR(a synonym for "PSTR()") is ignored and exception.what strings are stored in RODATA, eating up RAM. Workaround by using the linker to place the strings keying off their name ("*__exception_what__*"). * Rebuild moving exception.what to unique names Exception.whats are now all in __exception_what__ and can be moved by the linker to flash. Works aroung G++ issue with segments being lost in templates. * Rebuild with new LWIP locking * Update to latest libs, save iram Move two GCC FP support routines out of iram since they are in ROM already, saving some add'l IRAM. Same list as gcc 4.8. * Update BearSSL to latest release * Fix umm_perf reference to ROM function * Fix "reinterpret_case is not a constexpr" error In GCC 9 (and 8 from what I read on SO), a cast of a const int to a function pointer (via explicit or implicit reinterpret_cast) is not a constexpr. ```` /home/earle/Arduino/hardware/esp8266com/esp8266/cores/esp8266/umm_malloc/umm_performance.cpp:45:36: error: a reinterpret_cast is not a constant expression 45 | int constexpr (*_rom_putc1)(int) = (int (*)(int))(void*)0x40001dcc; | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ```` Remove the constexpr, potentially increasing heap usage by 4 bytes in debug mode. * Update libc.a to latest rev * Full rebuild of toolchain and libs * Upgrade to GCC 9.2, released in August 2019 Add builds for all 5 cross-compiles to pass CI * Move to --std=gnu++14 (C++14 + GNU extensions) * Fix Ticker merge conflict * Fix json merge conflict * One more merge diff fix * Reapply Ticker.h casting warning fixes for gcc9 * Update with fixes from Sming repo for PSTR and ASM * Upgrade to -gnu4 toolchain * Move to gnu5 build with add'l softFP from ROM * Move add'l softFP from IRAM to flash Per @mikee47, we miss sone add'l soft-FP routined in the linker which makes them end up in IRAM. Move them explicitly into flash, like a couple others we have already done this for. * Move to std=c++17/c17 in platform, remove abs/round Move to C++17 and C17 standards on the compiler options. Remove "register" from core since it is deprecated. Remove the #define abs() and #define round() which a) overwrote the C stdlib definitions, poorly, and b) broke the GCC core code which used "abs" as an internal function name. Now abs() returns an integer, and not whatever was being absoluted. fabs() etc. can be used if users need fload/double suport. round() returns a double now, which is basically what it was returning in the original case since adding/subtracting by a FP. * Use std::abs/round to replace the macro definitions Per discussion w/@devyte, preserve the abs() and round() functionality via the using statement. * Remove using std::abs which conflicted with C lib headers * Add 2nd arg (exception handler) to ets_isr_t Disassembly of the ROM shows there are 2 params to the ets_isr_t callback. The first is the arg passed in, the second is a pointer to an exception frame where you can get info about when the IRQ happened. * Move the gdbstub example to a subdir The Arduino IDE and the build CI don't build it without a subdir, so make one for gdbstub's example so it's visible and tested. * Fix ets_irq_arratch redefinition and core IRQ handlers Remove a duplicated, different declaration for ets_irq_attach from ets_sys.h. It never really even matched the other declaration in the same header. Update the core to IRQ handlers to fix the prototype and include the 2nd, unused frame parameter. * Actually rebuild the libc.a using GCC 9.2 * Fix SPISlave interrupt attach's 2nd parameter * Rebuild eboot.elf with GCC 9 * Update to latest SoftwareSerial for Delegate fix * Upgrade to GCC 9.3 * Rebuild all arch toolchains * Move to GCC 10.1 * Merge master and fix eboot build GCC10 now uses `-fno-common` so the eboot global variables were being placed in IRAM. Adjust the makefile and rebuild to fix. * Built complete toolchain for all archs * Pull in latest PSTR changes and fix GCC10.1 build Somehow the prior GCC build's -mforce32 patch wasn't applying correctly, but I was still able to get a binary. Fixed. Also pulled in latest PSTR changes in progmem.h * Update platform.io to platform C/C++ standards * Use PR's toolchain in platformio build * Fix several asm warnings in PIO build * Optional stack smash protection -fstack-protector Add a menu to enable GCC's built-in stack smash protection. When a subroutine goes past its end of stack, generate a crashdump on function exit like: ```` GCC detected stack overrun Stack corrupted, stack smash detected. >>>stack>>> ctx: cont sp: 3fffff20 end: 3fffffc0 offset: 0000 3fffff20: 40202955 00000001 0000001c 4020287e 3fffff30: feefeffe 000000fd 00000000 00000000 ... <<<stack<<< ```` Disabled by default because there is a small per-function code overhead (and CPU time if the function is called very frequently and is very small). BearSSL and LWIP are not built using stack smash detection, yet. * Fix duplicated stc=gnu99/c17 in build * Dump faulting function PC in stack overflow Report a fake exception to have the exception decoder print the actual faulting function. This won't tell you where in the function the issue happened, but it will tell you the function name first and foremost. * Rebuild with Platform.io JSON tag in release tgzs
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