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## Copyright (C) 2017 Jeremiah Orians ## This file is part of M2-Planet. ## ## M2-Planet is free software: you can redistribute it and/or modify ## it under the terms of the GNU General Public License as published by ## the Free Software Foundation, either version 3 of the License, or ## (at your option) any later version. ## ## M2-Planet is distributed in the hope that it will be useful, ## but WITHOUT ANY WARRANTY; without even the implied warranty of ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the ## GNU General Public License for more details. ## ## You should have received a copy of the GNU General Public License ## along with M2-Planet. If not, see <http://www.gnu.org/licenses/>.

Current

Added

Generates a warning on unknown preprocessor commands Implemented C99 negation Add support for empty defines Implemented support for #ifdef and #ifndef Implemented #error statement support Add support for evaluating macro variables Define arch specific variables i386 x86_64 arm aarch64 __riscv __riscv_xlen Implemented #undef statement support Add support for char** arrays Added basic test for multi-dimensional arrays Implemented minimal variable dereferencing support (base types only) Add support for assignment operators Add riscv32 port Enable riscv32 tests Added #FILENAME statement functionality to enable more flexiblity with debug messages

Changed

Updated M2libc dependency

Fixed

–max-string now validates passed input is an integer -D now throws an error if not passed an argument Fix segfault on half done #define statements Correct #define behavior inside of #if/#elif/#else/#endif blocks make clean now cleans up RISCV tests catch half broken #define (statements instead of segfaulting no longer segfault on null macro name no longer try to expand null tokens Catch the special case of attempting to remove a NULL macro token Fixed nested #if behavior to do the actual correct thing

Removed

1.9 - 2021-10-03

Added

Add riscv64 port Add tests for riscv64

Changed

Breakup program function to reduce complexity and risk of errors Update M2libc to enable RISC-V Development Update all tests to work around breaking update in blood-elf

Fixed

Stop hang on large global arrays Fixed Memory leak on read token Fixed Global buffer overflow in collect_weird_string Updated info in HACKING Report proper error message for negative global array values Fix global array initialization to allocate the correct amount of memory Fix Problem with global arrays Catch truncated function calls and truncated array statements

Removed

1.8 - 2021-06-08

Added

AArch64 added support for arithmetic right shift AMD64 added support for unsigned comparisons armv7l added support for unsigned comparisons AArch64 added support for unsigned comparison added support for –max-string to enable arbitrary large C tokens and strings Added prototype output buffering for x86 List of known M2-Planet issues has been added Added first generation implemention of typedef Add newline tokens to parse stream Add a preprocessor-only mode (-E) Add macro directives to token_list Add support for conditional inclusion (#if, #elif, #else, #endif) Add error checking for unexpected #endif Added hacky version of #define support (#if defined($FOO)) Add a test for supported preprocessor features Added simple macro expansion Add support for global char foo[12]; definitions Added support for make -j $num build operations for tests to speed up testing on multicore systems Enable virtualization of bare metal binaries Add support for &global_variable Added M2 to default macro environment to enable #if defined(M2) M2-Planet specific functionality Add support for -D variable and -D variable=value Added -e (errexit) shell option in scripts, where possible

Changed

knight-posix HEAP pointer now set by kernel rather than libc knight now leverages new SET instructions to reduce instruction count and processing time. Make type information localized to the inside of statements Default types available and added –bootstrap-mode flag to enable the old behavior for cc_* emulation Improve error reporting for unexpected non-newline Moved all low level primitives into M2libc Updated tests to leverage M2libc Standardized test scripts tests: use new-style mescc-tools flags Harmonize –debug behaviour for all scripts of the same test Unified all tests for all architectures Replace file_print with fputs Skip "extern" in type definitions. This makes supporting gcc >= 10 easier in GNU Mes.

Fixed

AArch64 Fix LSEEK syscall number Arithmetic recursion to match gcc behavior in regards to if(-1 > 0) Fix x86 behavior on unsigned compares Remove Segfault that occurs when outputing files in excess of 100MB in size Fix x86 close syscall Type abuse bugs that resulted in segfaults Fixed the backwards assignment of x86/AMD64 division Fix e25c1995aa SCM MES regression Fixed the backwards modulus Various segfaults in the new macro preprocessor Fix all special cases where line number was wrong

Removed

Removed obsolete bootstrap directory Removed need for fixup Remove test/common_* files with M2libc transistion

1.7 - 2020-11-15

Added

Added common error catch for the declaration of variables inside of loops that usually results in crashes Added support for C multi-strings

Changed

Changed ELF headers for FreeBSD compatibility Changed sha256 function to be more compatible with FreeBSD Changed malloc behavior to accept non-exact brk returns Changed looping tests to reflect new expected code behavior in regards to variable declaration inside of loops

Fixed

Type regression in cc_* compatibility Shift behavior to better match C standard 64bit host behavior in regards to primary_expr_number in knight tests GCC 10 compatibility

Removed

1.6 - 2020-04-30

Added

Added test for chdir and getcwd family of posix primitives Added fflush stub, for code to match our behavior when compiled with GCC (we don't buffer) Added fseek and rewind functions

Changed

Updated kaem Revised 27 to include dwart stubs Restructured tests to enable future growth Reengineered M2-Planet to leverage blood-elf v1.0's output format

Fixed

AArch64 wasteful stack Fixed continue behavior Generate fully proper elf output

Removed

1.5 - 2020-02-01

Added

Added support for \a and \b Added support for long Added support for size_t Added support for ssize_t Added support for const keyword Added support for alternate instructions for signed/unsigned combinations Added is_signed data to all types Added support for signed multiplication, division and modulus Added dist build target Added a manpage for M2-Planet Added support for nested structs thanks to fosslinux Added support for access, chdir and fchdir primitives Added AArch64 target (mescc-tools 0.7.0 required), all tests passing but rough on the edges Added require support to reduce number of segfaults possible Added first pass error checking in primitives Added first knight-native cc-minimal.c

Changed

Reordered types to prefer longs over unsigned over ints or chars Replaced NOP with NULL to better match what it is really ment. Enabled large binary support in knight-native

Fixed

Typo: Recieved -> Received ARMv7l elf-header regression Corrected AMD64's xchg rax, rbx into it's proper encoding A great deal of typos thanks to Andrius Štikonas Regression in numerate_number Segfault found in build_member when passed a non-number Segfault found in tokenizer Segfault in string hexifier Enabled skipped cleanup scripts Unbalanced { segfaults

Removed

Removed bootstrap process as it belongs in mescc-tools-seed instead. Removed need for fixup_int32 Removed unneeded lines in .gitignore

1.4 - 2019-06-23

Added

Changed

Tweaked cc_types.c to better match amd64 assembly Replaced out with output_list in cc_core.c For 32bit behavior on 64bit platforms Replaced generated seed with hand written seed in M1

Fixed

Removed

1.3 - 2019-04-22

Added

Added port to Knight-Native Ported 24/24 working tests for AMD64 Added support for CONSTANT to leverage sizeof(type)

Changed

Added basic verification of the compiled program (kaem) to test25 Added basic verification of the compiled program (Slow_Lisp) to test26 Updated from mescc-tools from 0.6.0 to 0.6.1 (To gain support for –64) Changed test26 to adust behavior according to struct size

Fixed

Corrected Global char* to behave correctly when given a static string Ensured pointers match register size

Removed

Removed need to hand calculate struct sizes

1.2 - 2019-04-14

Added

Added 24/24 working tests for armv7l Port to ARMv7l and ARMv6l both work

Changed

ELF-code segment now writable for ARMv7l without debug Updated from mescc-tools from 0.5.2 to 0.6 (with changes in checksums due to alternate null padding)

Fixed

Fixed unsigned division in ARMv7l port Fixed non-uniform behavior across locales and *BSDs Fixed broken stack in ARMv7l thanks to dddddd

Removed

1.1 - 2019-03-09

Added

Added support for \f, \v and \e Added refresh to bootstrap.sh to build seed from cc_x86.s Added missing license headers Added support for ~expressions Added prototype for Slow_Lisp build test Added Custom type for mes.h Added support for octal and binary numbers Added support for \0 Added support for GET_MACHINE_FLAGS in tests Added –architecture flag Added 24/24 working tests for knight-posix Added working HEAP/malloc to knight-posix

Changed

Converted M2-Planet to use GNU style error message Seed.M1 when built will now have the same checksum as M2-Planet self-hosted Harmonized license headers Updated M1 to current version Updated hex2 to current version Updated get_machine to current version Updated to mescc-tools 0.6.0 syntax Changed default architecture to knight-native Moved x86 specific exit.c and putchar.c to test/common_x86/functions Relocated x86 specific libc.M1 to test/common_x86 Formalized Knight-posix execve standard Relocated x86 specific file.c to test/common_x86/functions

Fixed

Fixed typo in file headers Fixed version number to reflect current version Thanks to akkartik several documentation issues were identified and fixed Corrected missed license headers Fix regression caused by Linux 4.17 Fixed broken logic comparions for knight-posix Fixed CONSTANT logic for knight-posix

Removed

Removed redundent x86 definitions

1.0 - 2018-08-26

Added

Added more generic logic to lookup_type Added prim_types to simply the task of reducing search space to primitives

Changed

Reorganized Primitive expression evaluation Reorganized Collect_local to better match implementation Broke out process_break Changed ordering in declare_function to reduce stack operations Converted weird_string collection into a simpler form Inlined 2 small stubs as breaking them out wouldn't help implementation Reordered conditionals for easier implementation and reduced operations Broke out OUT and FUNCTION to silence a single GCC warning Moved required_match and line_error into cc_core.c and removed required_match.c Relocated contents of test/functions to functions Upgrades mescc-tools to 40537c0200ad28cd5090bc0776251d5983ef56e3 commit Tweaked order for for, while and do loops to make them more in commone Tweaked source to better match assembly Simplify implementation order of logic Simplifed the promote_type logic to a much breifer form Broke out generally useful member lookup Upgraded seed.M1 to be generated by cc_x86

Fixed

Fixed detection of locals to screen out all non-primitive name space collisions Checked in updated gcc function definition Changed's numerate_number's behavior related to zeros Improved error message to help debugging Fixed bootstrap.sh to build a working M2-Planet binary

Removed

Removed redundent steps in Recursive statement Removed several redundent steps in Collect_arguments

0.3 - 2018-08-12

Added

Added support for global intializers Introduced base offset local and argument load/store Added function pointer requirement into M2-Planet Added test24 - get_machine Added General_Recursion to reduce complexity Added uniqueID to purge all code segments that recreate it's functionality Added struct Char arrays for structs Added in_set to make complex conditional logic into a simple char search

Changed

Made String naming 100% deterministic Broke up all_expr to simplify any manual implementations Cleaned up function calls Simplify variable looksup Reused a union to reduce globals Brought back common recursion Reorged logic tree to reduce complexity Simplified expression Changed EOF detection logic to deal with unsigned bits Reduced Memory usage down from 50MB to 2MB Simplified Tokenizer logic for easier implementation and understanding Simplified program logic Significantly reduced weird string detection logic Trimmed escape_lookup down to a key core Eliminated Several Minor unneeded steps

Fixed

Correct bug in how \" is treated Clean up of & when && should have been used Made test22 for consistent Fixed !c->a regression Fixed ARM platform build Reduced Memory usage per Token to size of string plus fixed padding

Removed

Removed need for string copying in M2-Planet Wasted steps in stack offsets Need for stack relative offsets Extra stack walks Removed need for current_function Removed unused values Removed legacy x86 << >> hacks at the cost of more instructions

0.2 - 2018-06-21

Added

Added type promotion to allow progress on mes.c Add support for anonymous unions inside of structs Added support for passing of function pointers via FUNCTION Added support for Local functions Added support for EOF Added additional debug information to M2-Planet Added line numbers and files names for errors in parsing to help debug Added support for close and fclose Added prototype support for chmod Added basic support for escape strings Added support for continue Added string_length function to string.c Added function numerate_string for converting string to integer Added supporting hex2char, char2hex, dec2char and char2dec functions Added support bitwise xor Added Blood-elf test Added Hex2_linker test Added M1-macro test Added prototypes to allow functions to be independently built Added support for debug format output to help debugging Added function specific counters to make output even more deterministic Added M1-macro seed to eliminate C compiler dependency for bootstrap

Changed

Improving Documentation to help new programmers get functional Cleaned up numerate_number to make it more general purpose Enabled stand alone builds of calloc Unified bitwise operations Made string.c more independent Created a M1-macro stub file to simplify independent builds Created a hex2_linker stub file to simplify independent builds Created a blood-elf stub file to simplify independent builds

Fixed

Minor cleanup and removal of unneeded whitespace Fixed outstanding bug when struct foo* foo and foo->bar was used Fixed ":foo bug Fixed "\n:foo bug Adjusted all previous references to numerate_number to ensure output is consistent Fixed up reader so that '\'' and "\"" work correctly now fixed "\"" bug in string output generation

Removed

Removed need for memset in numerate_number Removed minimal build target as it no longer serves a purpose Removed independent counters for for, while and if jumps

0.1 - 2018-02-23

Added

Added example programs Added first generation libc Added first generation defs.M1 added FOR Loop support along with example Added support for assembly statements Added CONSTANT to the language Added support for <. >= and > expressions Added struct support Added unary - and ! support Added additional functionality such as mixed structs, do while loops, gotos and tests for the new functionality Incorporate breaks into loops Became Self-Hosting

Changed

Tweaked argument processing to help mescc support Isolated global_token to cc.c Moved strings to the bottom of the output Broke out globals Started to move type information out of hard-coded logic Started adding tests instead of examples Put common x86 platform logic in a shared folder to reduce duplicate code Converted from legacy M2-Planet Input.c Output.c to M2-Planet -f input.c … -f Minor reordering of tests

Fixed

expanded type support to include integer arrays Reduced the memory churn in string creation fixed Capitalization problems

Removed

Removed need for enum in bootstrapping Removed need for global output list Eliminated the global stack Reduced library dependencies

0.0 - 2017-07-05

Added

Added minimal tokenizer Added minimal string support Added minimal parser

Changed

Fixed

Removed