* Fix PRxxx printf format macros
Update toolchain (newlib) to supply proper definitions for PRxxx macros.
Fixes#8220
Added a PRxxx macro to an example to ensure CI will catch any problem like
this in the future.
Fixes#8069
GCC 10.3 has a patch to stop escaping the initial : in Windows paths which
is causing Arduino and other tools to fail dependency checks and rebuild
everything on every compile.
without any external wiring.
This patch introduces the new method
Esp.rebootIntoUartDownloadMode()
When the user calls this method the ESP8266 reboots into the UART
download mode. In this mode the user can use esptool.py to flash a new
firmware file. The following command was used to test it:
$ esptool.py --before no_reset --after soft_reset --chip esp8266 \
--port /dev/ttyUSB0 --baud 460800 write_flash 0x0 firmware.bin
The implementation is based on the original implementation in the
boot ROM. Some parts of the original implementation can be found in
[1]. This patch is a squashed and simplified version of [2]. The non
squashed version might be helpful in case of debugging issues.
[1] https://github.com/twischer/xtensa-subjects/blob/master/reversed/bootrom.c
[2] https://github.com/twischer/Arduino/tree/reboot_uart_download_full
Signed-off-by: Timo Wischer <twischer@freenet.de>
RODATA can be copied automatically by the bootrom, so no reason not to
allow its use for strings and constants in eboot.c
Revert to pfalcon's original uzlib since the single patch to remove
RODATA is not required.
Rationalize eboot.ld linker script, clean up BSS and init it in code.
Saves 112 bytes of space in the bootloader sector by removing the
extra code associated with literal loads.
* Move CRC out of bootload sector
We added protection to only erase the bootload sector when flashing an
image when the new sector != the old sector. This was intended to
minimize the chance of bricking (i.e. if there was a powerfail during
flashing of the boot sector the chip would be dead).
Unfortunately, by placing the CRC inside the eboot sector *every*
application will have a unique eboot sector (due to the crc/len), so
this protection doesn't work.
Move the CRC into the first 8 bytes of IROM itself. This frees up extra
space in the boot sector and ensures that eboot won't be reflashed
unless there really is an eboot change.
Update newlib to enable the __ieee754_remainder(f) calls required by
std::remainder and others.
Add device test for std::remainder variants.
Fixes#7845
The FSMs that drive the encryption logic are not performance critical,
but they are very large. Build BearSSL using -Os on them, leaving -O2
everywhere else (i.e. encryption) for speed.
Saves 1-2KB of flash for SSL applications.
* Upgrade to upstream newlib 4.0.0 release
Includes 64 bit time_t and 5 years of updates.
Binary incompatible with libraries which use time_t (due to the size
difference). Recompiling with the new newlib should be sufficient for
most libraries, assuming source is available.
* Remove tools/sdk/libc directory, it isn't used anywhere
Somewhere along the line the copy of libc in tools/sdl/libc was taken
out of the build process. Files in there are not used, take add'l time
to build and install on a toolchain release, and just cause confusion.
Remove them.
* Fix 64-bit time for LittleFS
The core was setting 64-bit times automatically on new file creation or
updates, but would fail when attempting to read them back due to 64/32b
confusion.
Now attempt to read 64b time, and if that fails fallback to reading 32b
time to allow both old and new FS to preserve timestamps.
* Update to jjsuwa-sys3175 additions to GCC and newlib
@jjsuwa-sys3175 contributed multiple patches to GCC, included in
the toolchain, as well as a slightly faster pgm_read_byte() macro.
* Rebuild w/addl GCC patches, new BearSSL flags
* Remove copied libgcc.a file, is contained in toolchain
This commit adds W5500 W5100 and ENC28j60 drivers from @njh with credits
They are available in libraries/
An example is added in W5500 examples directory
plus:
* Extract dhcp server from lwip2 and add it to the core as a class.
It must always be present, it is linked and can be called by fw on boot.
So it cannot be stored in a library.
* ethernet: static or dhcp works
* PPPServer: example
* bring WiFi.config() to the lwIP generic interface (argument reorder common function)
* move hostname() from WiFI-STA to generic interface
* remove non readable characters from dhcp-server comments
* dhcp-server: magic_cookie is part of bootp rfc
* fixes from https://github.com/d-a-v/W5500lwIP/issues/17
* enable lwip_hook_dhcp_parse_option()
* +ethernet tcp client example in w5500 library examples
* PoC cache configuration control
Expaned boards.txt.py to allow new MMU options and create revised .ld's
Updated eboot to pass 48K IRAM segments.
Added Cache_Read_Enable intercept to modify call for 16K ICACHE
Update platform.txt to pass new mmu options through to compiler and linker preprocessor.
Added quick example: esp8266/MMU48K
* Style corrections
Added MMU_ qualifier to new defines.
Moved changes into their own file.
Don't know how to fix platformio issue.
* Added detailed description for Cache_Read_Enable.
Updated tools/sizes.py to report correct IRAM size and indicate ICACHE size.
Merged in earlephilhower's work on unaligned exception. Refactored and added
support for store operations and changed the name to be more closely aligned
with its function. Improved crash reporting path.
* Style and MMU_SEC_HEAP corrections.
* Improved asm register usage.
Added some inline functions to aid in byte and short access to iRAM.
* only byte read has been tested
Updated .ld file to work better with platform.io; however, I am still
missing some steps, so platformio will still fail.
* Interesting glitch in boards.txt after github merge. A new board in
master was missing new additions added by boards.txt.py in the PR.
Which the CI flags when it rebuilds boards.txt.
* Support for 2nd Heap, excess IRAM, through umm_malloc.
Adapted changes to umm_malloc, Esp.cpp, StackThunk.cpp,
WiFiClientSecureBearSSL.cpp, and virtualmem.ino to irammem.ino from
@earlephilhower PR #6994.
Reworked umm_malloc to use context pointers instead of copy context.
umm_malloc now supports allocations from IRAM. Added class
HeapSelectIram, ... to aid in selecting alternate heaps,
modeled after class InterruptLock.
Restrict alloc request from ISRs to DRAM.
Never ending improvements to debug printing.
Sec Heap option now pulls in free IRAM left over in the 1st 32K block.
Managed through umm_malloc with HeapSelectIram.
Updated examples.
* Post push CI cleanup.
* Cleanup part II
* Cleanup part III
* Updates to support platformio, maybe.
* Added exception C wrapper replacement.
* CI Cleanup
* CI Cleanup II
Don't know what to do with platformio it doesn't like my .S file.
ifdef out USE_ISR_SAFE_EXC_WRAPPER to block the new assemlby module
from building on platformio only.
* Changes to exc-c-wrapper-handler.S to assemble under platformio.
* For platformio, Correction to toolchain-xtensa include path.
@mcspr, Thankyou!
* Temporarily added --print-memory-usage to ld parameters for cross-checking IRAM size.
* undo change to platform.txt
* correct merge conflict. take 1
* Fixed #if... for building umm_get_oom_count. It was not building when UMM_STATS_FULL was used.
* Commented out XMC support. Compatibility issues with PoC when using 16K ICACHE.
* Corrected size.py, DRAM bracketing changed to not include ICACHE with DRAM total.
* Added additional _context for support of use of UMM_INLINE_METRICS.
Corrected some UMM_POSION missed edits.
* Changes to clear errors and warnings from toolchain 10.1
Several fixes and improvements to example MMU48K.
With the improved optimization in toolchain 10.1 The example divide by 0
exception was failing with a HWDT event instead of its exception handler.
The compiler saw the obscured divide by 0 and replaced it with a break point.
* Isolated incompatable definitions related to _xtos_set_exception_handler.
GDBSTUB definitions are different from the BootROM's.
* Update tools/platformio-build.py
Co-authored-by: Max Prokhorov <prokhorov.max@outlook.com>
* Requested changes
Changed mmu related usages of ETS_... defines to DBG_MMU_...
Cleanup in example MMU48K.ino. Removed stale memory reference macro
and mmu_status print statement. Cleanup printf '\n' to be '\r\n'.
Improved issolation of development debug prints from the rest of the debug prints.
* Corrected comment. And added missing include.
* Improve comment.
* style and comment correction
* Added draft mmu.rst file and updated index.
Updated example HeapMetric.ino to also illustrate use of IRAM
Improved comments in exc-c-wrapper-handler.S. Added insurance IRQ disable.
* Updated mmu.rst
Improved function name uniqueness for is_iram, is_dram, and is_icache by
adding prefix mmu_. Also, made them available outside of a debug build.
Made pointer precision width more specific.
Made some of the static inline functions in mmu_irm.h safe for ISRs by
setting then for always inline.
* Add a default MMU_IRAM_SIZE value for a new CI test to pass.
Extended use 'umm_heap_context_t *_context' argument in ..._core functions
and expanded its usage to reduce unnecessary repeated calls to
umm_info(NULL, false), also removed recursion from umm_info(NULL, true).
Fixed stack buffer length in umm_info_safe_printf_P and heap.cpp.
Added example for creating an IRAM reserve section.
Updated mmu.rst. Grammar and spelling corrections.
* CI appeasement
* CI appeasement with comment correction.
* Ensure SYS always runs with DRAM Heap selected.
* Add/move heap stack overflow/underflow check to Esp.cpp where the event was discarded.
* Improved comment clarity of purpose for IramReserve.ino. Clean up MMU48K.ino
* Added missing #include
* Corrected usage of warning
* CI appeasement and use #message not #pragma message
* Updated git version of eboot.elf to match build version.
Good test catch.
* Remove conditional build option USE_ISR_SAFE_EXC_WRAPPER, always install.
Use the replacement wrapper on non32xfer_exception_handler install.
Added comments to code describing some exception handling issues.
* Updated mmu.rst
* Expanded and clarified comments.
Limited access to some detailed typdefs/prototypes to .cpp
modules, to avoid future build conflicts.
Completed TODO for verifing that the "C" structure struct __exception_frame
matches the ASM version.
Fixed some typo's, code rot, and added some more cases in examaple irammem.ino.
Refactored a little and reordered printing to ease comparison between methods.
Corrected `#ifdef __cplusplus` coverage area. Cleaned up `extern "C" ...` usage.
Fixes issues with including mmu_iram.h or esp8266_undocumented.h in .c files.
* Style fixes and more cleanup
* Style fix
* Remove unnessasary IRAM_ATTR from install_non32xfer_exception_handler
Some comment tuning.
In the context of _xtos_set_exception_handler and the functions it registers,
changed to type int for exception cause type. This is also the type used by gdbstub
and some other Xtensa files I found.
* Do not write more data than requested on PUYA flashes
* Always align flash reads/writes to 4 bytes
* fixup! Always align flash reads/writes to 4 bytes
This commit simplifies the code a bit and fixes a bug that caused wrong number of bytes to be
written
* fixup! Always align flash reads/writes to 4 bytes
* fixup! Always align flash reads/writes to 4 bytes
* Check for result before additional read/write
* Add overloads for unaligned reads/writes
* fixup! Add overloads for unaligned reads/writes
* fixup! Add overloads for unaligned reads/writes
* fixup! Add overloads for unaligned reads/writes
* fixup! Add overloads for unaligned reads/writes
* fixup! Add overloads for unaligned reads/writes
* fixup! Add overloads for unaligned reads/writes
* fixup! Add overloads for unaligned reads/writes
* Add tests for flashRead/flashWrite
* fixup! Add overloads for unaligned reads/writes
* fixup! Add tests for flashRead/flashWrite
* fixup! Add tests for flashRead/flashWrite
* fixup! Add overloads for unaligned reads/writes
The GCC10 PR accidentally reverted to an older BearSSL commit. There should
be no code changes, but to keep everything clean move it back ahead to the
proper commit.
* remove lwip-v1.4 specific code
* ditto
* ditto
* fix ip4_addr definition
* CI: change debug builds to use IPv6, remove regular IPv6 builds
* ditto
* split pio CI in four (because they last twice the time of the other builds)
* remove option from pio
* remove lwIP-1.4 from doc
* restore pio CI splitting
* fix CI debug6 script
* ditto
* 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
* upstream lwIP is now downloaded by a makefile, not subsubmoduled
* lwip2: upstream lwIP not sub-sub-modules anymore
lwip2: Allow IPv4 and IPv6 DNS and SNTP server configured via DHCP to co-exist (patch against upstream)
* lwip2: enable tcp-listen-with-backlog feature
* lwip2 submodule update:
- enable more efficient chksum algorithm thanks to Richard Allen
- enable tcp listener with backlog
* more comments, fix backlog management, fix API
* move default value definition in .cpp
because one must not believe it can be redefined before including WiFiServer.h
* improved backlog handling, it is no more a breaking change
Only minor updates to headers and no functionality change on the
portions that we use in the ESP8266.
@Teddyz reported random crashes while running against a local MQTT
server and was able to report stack usages of up to 6136 bytes.
Increase the SSL stack to a little more than that, once again.
* Allow GZIP compressed flash updates
Modified the bootloader to be able to take stored updates in compressed
GZIP format (i.e. the output of "gzip -9 xxx.bin") and decompress them
on-the-fly to their final destination. This can work for apps and for
filesystems (when used with the 2-step update option).
Allow eboot to be built using -Os/2 optimizations by fixing some portions
which failed when any optimizations were used. Add -Wall and use data
and function sections to reduce size. Use -Os to minimize size.
Remove obsolete esptool-ck calls to build a .ROM image, we don't use it.
Move all uninitted variables to RAM from IRAM, allowing 8-bit access.
Hook in @d-a-v and @pfalcon's uzlib port to actually do the
decompression. Do not use any CRC checking which saves space. Since we
have overwritten all of flash by the time we know id the CRC matches,
there's nothing we could have done anyway.
Adjust the Updater class to support GZIP files and not attempt to patch
them.
Bootloader builds to 0xd90 out of 0xfff bytes.
* Add @d-a-v's patch for httpupdate
https://github.com/esp8266/Arduino/pull/6820#pullrequestreview-326541014
* Update uzlib to point to pfalcon++
For now, because there are some self-test failures with @d-a-v's esp8266
branch (whose cool new features we don't actually use in eboot now)
start with pfalcon's 2.9 release and add the 2 patches (clcidx to code
from IRAM/RODATA, and the Windows test file renaming) needed to build
and run successfully.
* Add (c) notice for uzlib to README
* sdk:22x191122
another firmware to test
not default: v2.2.1-119-ga0b1311 (shows as SDK:2.2.2-dev(a58da79) in debug mode)
default unchanged
* and the obj files
* FW: use NONOS-SDK branch 2.2.x from 2019-10-24 by default
former one is available when using generic board configuration
* tv qvoqve, Platform-ii
* nonos-sdk v2.2.x from 2019-11-05 by default for all boards
(previous ones can be selected with the generic board)
* (w/ fw files)
* 191024 by default, 191105 is an option
* adds initial commit to boards.txt before actual edits
* reminder to remove vim .swp file
* Removes spaces and modifies outdated tags for menu `CpuFrequency -> xtal` for example
* Adds SparkFun Bynk Board to boards.txt.py, moves .build flags all together for SparkFun Blynk
* runs boards.txt.py to generate files for pull request - all files have been included as instructed at top of boards.txt file
* Deletes three .orig files generated by boards.txt.py: rst, txt, and json
* Moves boards.txt.py back to /tools directory and attempts to change its mode.
* restore 'x' flag
* sdk: testing branch update (v2.2.x), tidy up fw names in menus, add dates
Former default SDK (22y, renamed to 22x-190703) is still available
Changelog is included in sdk directory
* Keep current FW as default until next release
* update for PIO
This removes definitions relating to the built-in SNTP client that
are LwIP v1 specific. Instead of duplicating these pull in the
LwIP header that correspond to the required functions depending on
the version of the stack being used.
Without this fix calls to sntp_getserver() work but return invalid
data and can lead to stack exhaustion.
Update the NTP-TZ-DST example to use the Arduino sntp.h header
rather than duplicate the conditional checks to use the LwIP header.
Tests:
- Build against a simple SNTP API demonstratin app and all
LwIP configurations. Verify that the app runs for an extended
period and that the expected results are obtained.
Fixes#6590
The ASM block that implements the read-uint32-unaligned returns a
uint32_t. The old code was doing a cast like `(float)(uint32_t ret)
which actually goes and creates a new float of the positive uint value
(approx, of course due to exponent and sign bits) which is not correct.
C and C++ don't have a concise way to convert the bits in a register
from int to float interpretation, so avoid the whole issue by making a
new function which uses the same ASM block as the read-uint32-unaligned,
just make the destination and return values as floats.
* Replace ASM block w/C marco for PSTR
GAS doesn't support the C language idiom of catenating two strings
together with quotes (i.e. "x" "y" === "xy").
Specify the section attribute fully in the section attribute, instead,
to allow this.
* Fix WString optimization
PR #6573 introduced a corner case where a blind String() without any
initialization was in an in invalid state because the buffer and len
would not be updated properly. Concatenating to the empty string could
cause a failure.
Now, set the default state in ::init() to SSO (which is what happened
before when we were using String(char *s="")) and fix the crash.
* Move all PSTRs to own section, allow string dedup
GNU ld can deduplicate strings, and does so for most normal char *s
automatically. However, for PSTRs we were using a unique section per
string *and* the section was not flagges as containing dedupable
0-terminated strings.
Modify the PSTR macro to emit assembly, which lets us set the section
flags required (SM) for the variables, and use inline assembly to get
the asm-block defined address.
Should result in smaller compiled binaries if any strings are
duplicated.
* Give each PSTR its own segment
* Allow disposing of unused strings before merging
Add the "a" section flag to allow the linker to throw away unneeded
strings. Without this flag, the linker will not discard unreferenced
strings and ROMs will increase in size, possibly dramatically.
* Add typedef for putc1, fn_putc1_t.
Replaced relevant usage of `(void *)` with `fn_putc1_t`.
Correct usage of `ets_putc()`, returning 0, in libc_replacement.cpp
This PR assumes PR https://github.com/esp8266/Arduino/pull/6489#issue-315018841 has merged and removes `uart_buff_switch` from `umm_performance.cpp`
Updated method of defining `_rom_putc1` to be more acceptable (I hope) to the new compiler.
* Use PROVIDE to expose ROM function entry point, ets_uart_putc1.
Added comments to ets_putc() and ets_uart_putc1() to explain their
differences. Change prototype of ets_putc() to conform with fp_putc_t.
Updated _isr_safe_printf_P to use new definition, ets_uart_putc1.
In order to give user libs a change to update to the new symbols, re-add
the _SPIFFS_XX symbols to the linker file with a comment that they are
deprecated.
Also add back spiffs_hal_xxx functions, also marked as deprecated.
Fixes#6542
When the FS_END was adjusted to end on a full block (i.e. rounded down)
to avoid filesystem issues, but _FS_end was changed. The EEPROM library
used _FS_end to implicitly calculate the start of the EEPROM data, so
this means after the _FS_end fix, EEPROM data written with prior
releases would "disappear."
Avoid the issue by explicitly calculating the EEPROM start location in
the linker, using the same formula as prior release.
Fixes#6531
