from: https://github.com/bold84/tinycc
Author: Benjamin Oldenburg <benjamin.oldenburg@ordis.co.th> 2026-04-04 16:29:28
Committer: Benjamin Oldenburg <benjamin.oldenburg@ordis.co.th> 2026-04-04 16:29:28
Branch: win_arm64_clean
Commit: 8b5ab1bb01
Also here: https://repo.or.cz/tinycc.git/shortlog/refs/mob/mob_bold84/win_arm64_clean
This and the followup commits on mob is selected parts
of that original branch. So it is not everything.
It is not, for example:
- unrelated whitespace changes in many files
- a "pin msvcrt.dll" feature in tccpe.c (why that)
- a native getenv() replacement in tcc.c (why that)
- larger changes to the win32/lib runtime and tccrun.c (not needed)
- a very gcc specific detail for struct alignent in tccgen.c
- a custom set/longjmp implementation/replacement (not needed)
- lots of rather basic test files in the win32 folder
- a 'tests/asm' folder with some files (one file renamed to 140_test...c)
- a .docs folder with one file
Revert "Add support to debug libtcc code"
- not fully developed experimental feature
This reverts commit 1fe3e3bff5.
This reverts commit 4768b11737.
Revert "tests: add test for x86_64 xor REX prefix bug in load()"
- AI generated nonsense test
This reverts commit d5ecb52a71.
Revert "tccpp.c: Improve integer constant overflow warning"
- Too long and confusing messages and comments for feature
with questionable benefit.
This reverts commit 085bdf8997.
riscv64-link:
- cleanup "pair pcrel lo relocations by hi address"
From fada98b1ce
tccgen.c:
- Simplify "Cast signed pointer offset to ptrdiff_t before performing arithmetic"
From 5ad52cc1ed
libtcc.c:
- Revert "tcc options: document behavior and clashes (no-op)"
a bit more information than one would like to have I think.
(why try to understand that comments plus the extra
script if one can as well just read the code itself ;)
From 234e2dd2bf
tccdefs.h:
- Revert "Move lib/va_list.c into include/tccdefs.h"
Lets not fill tccdefs.h with too much inline code
Also, -nostdlib -run is no longer supported
From fa6a6bfbbd
arm64-gen.c:
- cleanup "Implement TOK_NEG for floats natively"
Also, make it "no lvalue" in tccgen.c/x86-64-gen.c
From c39eaf10cf
lib/lib-arm64.c:
- cleanup "Remove libc dependency from lib-arm64"
using unions is much faster than some made up memcpy()
From 8c61b91de8
Moving the u128_t struct may invoke calls to memcpy/memmove when
compiled with tinycc, which would depend on libc.
For example, some configure scripts get confused if they fail to build
test programs involving long doubles. I'm not sure if this is the root
cause, though.
workflow:
- revert 'pinact for security' for readability
from 831c3fa184
tccpp.c:
- remove code that allows tcc to parse numbers incorrectly (*)
from 829c848520
tccgen.c:
- Revert "Relaxed the 'incompatible pointer type' warning a bit" (*)
from d9ec17d334.
tccrun.c:
- remove support for -nostdlib -run
for simplicity, we require "main" with tcc -run always
tccpp.c:
- Revert "Free all preprocessor memmory in case of error."
from c96f0cad61
Remove TinyAlloc->limit instead. Thus it can do also bigger
allocs. Big TokenStrings (like 200kb+ when compiling tcc)
may come from inline functions or from large initializers.
Makefile/configure:
- use --config-pie for configuring tcc output only
- use -fPIC with clang-x86_64 to avoid 32-bit relocs
libtcc.c:
- fix "tcc file.c -run" i.e. -run as last argument
i386-gen.c:
- PIC refactor
(*) sorry, but code in tcc should have a minimum of generic relevance
Some targets (netbsd) require that code is
compiled with -fPIE.
i386-gen.c:
Lot of changes to load/store code
i386-link.c:
Set PCRELATIVE_DLLPLT depending on configuration
tccelf.c:
Change some relocations and add get_pc_thunk.o
Makefile lib/Makefile lib/get_pc_thunk.S:
Add new file get_pc_thunk.o
tcc.c:
- be nice to leak checkers
tcctools.c:
- remove unused TCCState params
tccrun.c:
- call bound_exit() after signals to let it free mem
tccelf.c:
- use section_add() instead of section_ptr_add() when
more appropriate
tccpp.c:
- use size_t to align tal_header naturally
- 'POINTER_SIZE' and 'PTR_SIZE' in the same source is confusing
- "char file_name[TAL_DEBUG_FILE_LEN + 1];" looks silly.
- next_nomacro(): skip UTF8 BOM at BOF
tccgen.c:
- get rid of STMT_EXPR clause on top of block
- warn with useless type like 'int;'
- move skip()'s in block() for better error line-info
- BIT_SIZE bits are meaningful only with VT_BITFIELD
(not with enums for example)
workflow/test-win32:
- build with MSVC using build-tcc.bat also
alloca.S:
- fix 'off by one' problem on win32 (must touch current page
too because the 'push %edx' at the end could touch the next page)
- must not align greater than 4 when used for struct args
(i386-gen.c:gfunc_call())
libtcc.c:
- accept -g1dwarf (dwarf output, only line info)
The code:
void mul(double *p)
{
*p *= 2.0;
}
failed on x86_64 because register was not loaded after
bound checking call.
Also printed size when pointer indir failes.
I updated the tests/gcctestsuite.sh a bit.
before:
3329 test(s) ok.
210 test(s) skipped.
168 test(s) failed.
28 test(s) exe failed.
after:
3331 test(s) ok.
299 test(s) skipped.
79 test(s) failed.
26 test(s) exe failed.
I found some small problems:
include/tccdefs.h: Add alloca definition for i386 and x86_64
lib/alloca.S/lib/alloca-bt.S: align i386 alloca to 16 bytes.
i386_gen.c vla code and gcc do the same.
x86_64-gen.c: fix typo in comment
Tested code with:
clang -fsanitize=address,undefined,nullability -pie -fPIE -Iinclude -I. -g tcc.c -o tcc.tcc -lm -ldl -lpthread
./tcc.tcc -Iinclude -I. -b -g tcc.c -o tcc.tcc1 -lm -ldl -lpthread
Also checked on i386/x86_64 with -fsanitize=memory (others not supported).
arm-link.c: use read32le/write32le/add32le to avoid unaligned access
tcc.h i386-asm.c: fix signed left shift
lib/bcheck.c: Add _Atomic
libtcc.c: Correct MEM_DEBUG_CHECK3 to avoid unaligned access
riscv64-link.c: Fix R_RISCV_SET16
tccpp.c: Align tal_header_t to avoid unaligned access
tccgen.c x86_64-gen.c: avoid use of uninitialized value
There are still warnings reported:
tccgen.c:4031:13: runtime error: member access within null pointer of type 'TCCState' (aka 'struct TCCState')
tccelf.c:321:22: runtime error: applying zero offset to null pointer
tccelf.c:1132:23: runtime error: applying non-zero offset 169184 to null pointer
A lot of left shift of negative value warnings.
I ignored these for the moment.
Also the -run option does no work well with -fsanitize. It gets confused
because it does not detect that the generated code in memory is used
without -fsanitize option.
There are a lot more -fsanitize options. I did not find serious problems
with them.
workflows/build.yml:
- win32/64: install mingw32/64 gcc on msys (because the default
gcc installed elsewhere seems to use ucrt, producing incompatible
fp printf formats.)
tccgen.c:
- cleanup funcs: save any lvalues from return expressions. Also use
get_temp_local_var() which however was causing a problem on i386
because its gfunc_call() removes the arguments from vstack and by
that defeats the 'in-use' tracking of get_temp_local_var(). Fixed by:
i386/arm/arm64/x86_64-gen.c:
- in gfunc_call(): save_regs before anything else, fixes
problems seen in arm64/i386
tccpp.c:
- allow arm asm specific use of '#' in macros
libtcc.c:
- organize -M options, and:
tccpe.c:
- move the subsystem option parsing from libtcc.c
tccelf.c:
- improved error handling in tcc_load_ldscript()
lib/atomic.S:
- TCC_TARGET_... not defined when building the lib
- endbrNN security feature not supported by TCC
tests/tests2/136_atomic_gcc_style.c:
- never use standard assert() in tests
The functions fetch_and_add_arm, fetch_and_add_arm64 and
fetch_and_add_riscv64 where removed with atomic change.
Replace the code in bcheck.c with call to atomic_fetch_add.
Use asm implements for i386/x86_64/arm/aarch64/riscv:
__atomic_load_[1,2,4,8]
__atomic_store_[1,2,4,8]
__atomic_compare_exchange_[1,2,4,8]
__atomic_test_and_set_[1,2,4,8]
atomic_thread_fence
atomic_signal_fence
atomic_flag_test_and_set
atomic_flag_test_and_set_explicit
atomic_flag_clear
atomic_flag_clear_explicit
`atomic.S` is extracted from `gcc` v15.1.0 `libatomic.a`.
And generated by https://github.com/kbkpbot/gen_atomic.git
arm-asm.c: add forward branches & some ops
lib/armeabi.c: faster i/udivmod (asm)
arm-gen.c: use movw/movt to load constants for CPUVER >= 70
configure: use dwarf-4 debug sections on android, detect idiv
lib/Makefile: always add -I$(TOP) for access to config.h
tcdbg.c: add a "code mapping symbol" to help out llvm-objdump
tccelf.c: don't load SHT_ARM_EXIDX, modify ARM.attributes
tccpp.c: accept '@' for arm asm comments
libtcc.c:
- free 'elfint' string
- acceot -O and -Os
- accept -gstabs (to override dwarf when default)
- better -Wp,...
tccpp.c:
- #line cleanup
also warn with "extra tokens after directive"
tccgen.c & xxx_gen.c:
- force CPU flags to register earlier
tccelf.c:
- tcc_load_object: align size only for code sections
data/bss objects are always put with their specfic type align
(in decl_initializer_alloc())
x86/64 doesn't need aligned code
from c6afdff7ab
tccpe.c:
- enable dllimport for "_imp__<sym>" also from assembler
x86_64-gen.c & lib/libtcc1.c:
- simpler fneg without libtcc1 reference
tests2/134_double_to_signed.c:
- a tcc compiled by msvc won't pass this test
Commit a522213 ("tccpe.c: never assume static...") removed the global
-I$(TOP) for cleaner lib build, and ensured that it is added for
bcheck.c as it now includes config.h, but forgot that bt-exe.c also
needs config.h, as it includes ../tccrun.c which includes it.
Also, the explicit tccrun.c prerequisite for bt-exe.c is not required,
as all *.o lib files depend on $(TCC), which depends on libtcc, which
depends on tccrun.c .
Also, at win32/built-tcc.bat, while bcheck.c needs -I.. for config.h,
bt-exe.c doesn't, as ../tccrun.c does find it where it expects it.
just clear s1->static_link before loading msvcrt etc.
Also:
- configure: get cc_version/name when making a cross compiler too
- configure: fix android triplets
- Makefile: remove CONFIG_TCC_CROSS, check TCC_TARGET_xxx instead
- libtcc.c: parse some linker option arguments more correctly
- tccelf.c: fix a versym problem with clang on android
- lib/Makefile, build-tcc.bat: bcheck.c now includes config.h
Put former NATIVE_DEFINES into config.h. Such tcc can be run
and tested directly from source more easily, like for example:
tcc -run tcc.c -B. -run test.c
Also:
- tccelf.c: cleanup
- tccpp.c: avoid stupid clang warning
- configure: reduce -Wno- switches
- tcc.h: inline wait/post_sem()
- tccpe.c: simplify import (assume STT_NOTYPE is function)
with -Wl,-oformat=binary, executable code should come first.
(for linux kernel image for example)
Also:
- simplify RELRO sections: create them as readonly, but add
SHF_WRITE flag later when needed (i.e. relocations do exist)
- tcc.h etc: exclude eh_frames on non-elf platforms
- tccelf.c:tcc_load_object_file(): don't load debug sections when
linking without -g (special dwarf case in relocate_section()
wont work when dwlo/hi were not initialized).
- tcc.c: avoid loop if something fails (ret < 0) without message
(while failing without message should not happen either)
- tccelf.c:tcc_load_alacarte: give message
- tccpp.c: treat '# 123xyz' in asm file as comment
- lib/Makefile: cleanup
- libtcc.c: tcc_add_library(): fallback to try filename as is
(also remove tcc_add_library_err())
Since commit 45cff8f0 tcc eventually generates object files
of non-even size.
tccelf.c:
- check ARFMAG for better invalid archive detection
- file_offset needs to be aligned, not the size (just a nitpick)
lib/Makefile:
- remake everything when tcc did change
Apple needs CONFIG_RUNMEM_RO=1
I now only set CONFIG_RUNMEM_RO=0 on _WIN32
Openbsd does not have malloc.h so remove some code
Also fix some warnings when compiling lib with gcc
- LIBTCCAPI int tcc_set_backtrace_func(void *ud, ...)
accept opaque user data pointer,
- tcc -vv -run... : show section info
- use memalign() to allocate runtime memory
- printline_/dwarf : pass output to parent function
- tccpe.c : fix -nostdlib -run
- --config-backtrace=no : make it work again
- new LIBTCC API tcc_setjmp() to allow longjmps & signals
from compiled code back to libtcc per TCCState
- new LIBTCC API tcc_set_backtrace_func() to handle backtrace output
- move c/dtor/atexit stuff to runtime (lib/runmain.c)
- move bt-log.o into libtcc1.a
- add timeouts to github action (beware, it did happen to hang
infinitely in the signal handler at some point)
tcc failed to run with bounds checking enabled because the functions
rt_wait_sem, rt_post_sem and _rt_error where defined twice.
This is solved by making them weak in tccrun.c
Also a nested lock was present when setting TCC_BOUNDS_PRINT_CALLS=1
This is solved in lib/bt-exe.c by moving lock/unlock code.
Also added a testcase in tests/Makefile to test tcc with bounds
checking enabled.
- abort with notice when tcc_relocate() is called with the
former two-step method
- support backtrace & bcheck not only with tcc_run() but also
for directly called functions from tcc_get_symbol(); enable
witn 'tcc_set_options("-bt/-b");'
- move struct rt_context and debug sections into compiled code
for TCC_OUTPUT_MEMORY also
- protect access (g_rc) with semaphore
Also:
- add armv7/aarch4/riscv64 github tests (qemu emulated)
- win32/build-tcc.bat: build cross compiler only with -x
using (modified) tcc_backtrace() instead.
Also
Also fix the original bug with doubles on x86_64.
(which was not caused by incr_offset() actually).
See 598134fff6
Also cleanup on_exit() stuff
From fef701b57f
The following targets are added:
testc / testc2.all / testc2.37 / testc2.37+ / testc2.37-
testcpp.all / make testcpp.17
This allows to check that the testcase(s) test the code modified.
See Makefile tests/pp/Makefile tests/tests2/Makefile
lib/tcov.c: Fix while loops with fgets.
tcc.h: Fix tcc_p compilation with latest gcc
tests/tests2/22_floating_point.*: Better test floating point
The incr_offset offset code was not working with bounds checking.
So I reverted part of tccgen.c.
See new test code 132.
Also added some debugging code that prints location of
bounds checking calls. Needed this to find the problem.
See lib/bcheck.c, lib/bt-dll.c, lib/bt-exe.c, lib/bt-log.c, tccrun.c
tccgen.c:
- allow cross-compiling 0.0L (cross-compile tcc with tcc)
tccelf.c:
- use alignment of TLS section for PT_TLS
tccpp.c:
- support long double constants on systems that do not support
long doubles (i.e. mark them (VT_DOUBLE | VT_LONG))
tccdefs.h:
#define __has_feature() for android
remove _unaligned (why define a msvc extension under !_WIN32)
