As the standard requires, take 4 hex digits after the \u opener of a
Universal Character Name, or take 8 hex digits after \U, but reject
smaller counts and don't consume more (https://port70.net/~nsz/c/c11/n1570.html#6.4.3,
https://port70.net/~nsz/c/c99/n1256.html#6.4.3).
The unicode codepoint used to get truncated to 1 byte. Now it gets expanded into UTF-8,
matching gcc & clang behavior on Linux.
TODO: Universal character names should also be supported in identifiers,
as in, e.g., char \u010dau_sv\u011bte[]="čau_světe";
Support OpenBSD/FreeBSD/NetBSD on asm.
move PAGESIZE to tcc.h and use _SC_PAGESIZE (netbsd/arm has 8192 pagesize)
arm:
- fix cmp instruction for qemu (raspberry pi works without patch?)
- increase start address/size
- use large plt size
- add return R_ARM_PREL31
- add R_ARM_TARGET1 to prepare_dynamic_rel
- add gcc_s to FreeBSD (unwind code)
- do not use __clear_cache on bsd (sometimes bad system call)
- do stack unwinding on bsd
- test/tcctest.c: use %lld %llu on bsd
The small common parts within elf_output_file() aren't
worth the many #ifdefs. Also, set section sizes and
allocate section names in 2 separate functions.
Using "-0.0 - x" still isn't enough if x is a NaN, so bite the bullet
and implement sign-bit flipping via memory. (It's usually not too bad,
the -0.0-x method also uses memory for the floating point constant).
This way is at least shorter than implementing a new top-level operation
for all backends (a negate) that would be unary.
implement load/store to constant address
use VT_LLONG instead of VT_PTR in register passing
fix bound checking problem with small structs
enable riscv tests in tests/tcctest.c and tests/tests2/119_random_stuff.c
moved target_machine defines to the <target>-gen.c files.
Also:
- c2str.c moved into conftest.c
- tccdefs.h ; defined(__TINYC__) && !defined(_LOCORE) removed
(in tinycc __TINYC__ is always defined and _LO... is never.)
- stddef.h : too many #ifdefs, removed
- tccgen.c:stabs: support win32 long doubles aka doubles.
- win32: math.h/tcc_libm.h: fix pointer mismatch in modfl
- tccpp.c: increment include_stack_ptr after the file was
actually found otherwise it would print
"in file included from <itself>: file not found..."
netbsd does not allow text relocations in text segment.
tcc.h:
- Add data_ro_section
- Fix typo rela.plt
tccelf.c:
- Add data_ro_section
- Make bounds_section/lbounds_section rw
- Add GNU_RELRO section for data_ro_section/bounds_section/lbounds_section
- Fix relocation for __dso_handle in atexit()
tccgen.c:
- Use data_ro_section
x86_64-gen.c:
- Use R_X86_64_PC32 instead of R_X86_64_64 for bounds checking
tests/Makefile, tests/tests2/Makefile
- Enable dll tests for netbsd
tcc_define_symbol(): now only for -D on command line
include/tccdefs.h: converted to strings and compiled into
the tcc executable. Can be disabled with
./configure --config-predefs=no
In this case include/tccdefs.h is loaded at runtime. This is
default for other build-methods (build-tcc.bat) also (to avoid
some complexity).
Also:
- lib/Makefile: fix typo
- tcc.h : avoid _strto(u)i64 (for TCC on WIN98/2K)
- tccpp.h:cstr_printf() : workaround incompatible vsnprintf's
(generally faster too)
This implements support for FreeBSD on aarch64
This partial implements support on FreeBSD(32). This still needs fixing
i386_gen.c because small structures on this target are passed in registers.
Add aligned 16 to __int128_t for FreeBSD
Support __i386__ on FreeBSD/NetBSD
Fix testcase 115 on FreeBSD/NetBSD
Disable testcase 116 on *BSD* because TLS_FUNC/TLS_VAR not set in bcheck.c
Remove FreeBSD/FreeBSD_kernel code from tccelf.c
Fix crtbegin/crtend
Use dlsym on all bsd targets
Check .eh_frame on all bsd targets
Disable test3 on FreeBSD and NetBSD and use test1 instead because dlsym not working (WIP)
Disable dlltest and 113_btdll on NetBSD because text relocations are not allowed
Disable 115_bound_setjmp on NetBSD because longjmp is renamed into __longjmp14
Currently tcc does not use lazy binding. It puts all relocations in the RELX
section and solve them all at startup.
This was not working on bsd.
tcc.h:
- New RELPLT_SECTION_FMT for plt relocations
- New entry relocplt in struct Section
tccelf.c:
- put_elf_reloca: put R_JMP_SLOT in relocplt section
- build_got_entries*: Use two passes because R_JMP_SLOT and R_GLOB_DAT
can not be intermixed on some targets (arm, arm64)
- layout_sections: Calculate correct size relocplt section for DT_ values.
Make sure relocplt is last
- fill_dynamic: Add DT_ values when got is filled
move DT_VERSYM because dynamic linker cannot handle it standone
- Add note section for NetBSD
arm-link.c/arm64-link.c/i386-link.c/riscv64-link.c/x86_64-link.c:
- fill got table with pointer to plt section or symbol value in case
of TCC_OUTPUT_MEMORY
arm-link.c/arm64-link.c:
- fix offset first plt entry
i386-link.c/x86_64-link.c:
- use correct reloc entry
- use relofs - sizeof (ElfW_Rel) because the reloc is already done
lib/bcheck.c:
- no __libc_freeres on FreeBSD and NetBSD
tests/Makefile:
- Add -fno-stack-protector for OpenBSD
tests/tests2/Makefile:
- disable 106_pthread/114_bound_signal
- The compiler should not use these
- However tccrun.c & libtcc1.a files should use these
Also:
- use s1->loaded_dlls for loaded dlls instead of dlopens
- alpine musl: fully supported now and tested
- ./configure ...
--config-backtrace=no : disable backtraces
--config-bcheck=no : disable bcheck
- tests:dlltest: enable by default
- tccrun.c : simplify mmaps
- __builtin_alloca : always use asm-alias (instead of #define)
- tccpe.c : use write32le
Fix all testcases for openbsd except dlltest.
Remember dlopen calls and use them to fix openbsd dlsym problem
Use crtbeginS.o/crtendS.o for DLL for bsd
Do not include -ldl for __NetBSD__
Redirect malloc, realloc, ..., free for bsd
Align stack in tests/asm-c-connect-*.c for x86_64
Remove -B in tests/pp/Makefile (not supported on bsd)
tcc_enter/exit_state() are meant exclusively to protect
the tcc_compile() and its sub-functions in tccpp.c,
tccgen.c, tccasm.c and xxx-gen.c.
Other files that are part of libtcc simply must not use global
variables.
- riscv64/last_hi: move to TCCState
from 72250bece2
- tccrun.c: Using a fixed address would not work anyway
("tcc -run tcc.c -run ..." for example)
from baacb0f52a
- tests/Makefile: support for a platform doesn't make sense if
it doesn't pass our basic tests.
from 591feda103
Also:
- tccgen: cleanup "duplicate member" (only 2 passes,
avoids additional TokenSym field)
from 170be79a42
After this commit we can compile and run code with some limitations.
- The dlsym function is broken so this makes -run and bound checking
not work all the time. Make -k test does work for most code.
- You have to do:
ln -s /usr/lib/libN.so.x.y /usr/lib/libN.so
for all .so files in /usr/lib.
OpenBSD uses opendir/readdir to find the correct so file. This is
not the way other platforms do this.
Also the .a versions do not have all symbols that are present in the .so
files.
tcc.h:
- Use different dynamic loader
elf.h:
- Add SHT_X86_64_UNWIND
tccelf.c:
- Do not use -dl
- Add required NOTE section
- Add extra dynamic tags
- Allow SHT_X86_64_UNWIND/SHT_NOTE in tcc_load_object_file
tccrun.c:
- Uses MAP_FIXED because without the offset between exec and data section
becomes too big for x86_64
lib/bcheck.c:
- Do not use __libc_freeres
tests/tcctest.c:
- aligned_function also disabled for __GNUC__ == 4
Check duplicate struct/union member names
tcc.h: Add cnt field in TokenSym
tccgen.c: New function check_fields to find duplicate member names.
This avoids quadratic behavior and can be used for large structs.
Tcc considered function ptrs with different return types to be
compatible which disallowed some otherwise valid operations like:
`_Generic(foo, int(*)():0, void(*)(void):1)`
which would fail to compile with a error message of "type match twice"
This changed also required longjump's return type to be void and
munmap's to be int to be compatible with standard headers.
- tcc.h: msvc doesn't grok __func__ (reverts previous commit)
- tccgen.c: fortify tcc against bogus code:
- n[sizeof({3;})]; // statement expression outside of function
- f(){"123"4}; // tokens with values following each other
(also, add "type defaults to int" warning for variables)
- tccpe.c: removed a check that caused BSS symbols not to be
exported. Whatever that check was meant to prevent.
- win32/build-tcc.bat: cmd.exe sometimes doesn't grok '-' in labels
- Revert "libtcc: no need to undef"
This reverts commit 2b7aa2a1e1.
- Revert "tcc.h libtcc.c: remove unused defines"
This reverts commit 985d963745.
The point of these "unused defines" is to be unused, that is
to remind people not to use malloc but please to "use_tcc_malloc",
instead.
Fixes potential writes past the allocated space with mostly
illegal flex array initializers. (60_errors_and_warnings.c
:test_var_array)
In exchange suspicious precautions such as section_reserve
or checks with sec->data_allocated were removed. (There is
an hard check 'init_assert()' for now but it's meant to be
just temporary)
Also, instead of filling holes, always memset(0) structures
& arrays on stack. Sometimes more efficient, sometimes isn't.
At least we can omit putting null initializers.
About array range inititializers: Reparsing tokens has a
small problem with sideeffects, for example
int c = 0, dd[] = { [0 ... 1] = ++c, [2 ... 3] = ++c };
Also, instead of 'squeeze_multi_relocs()', delete pre-existing
relocations in advance. This works even if secondary initializers
don't even have relocations, as with
[0 ... 7] = &stuff,
[4] = NULL
Also, in tcc.h: new macro "tcc_internal_error()"
Always fine to try out things but not everything must be shown
to the public. ;)
Also, AFAIK pointers must compare equal only if derived directly
from each other (for example by cast to void* and back).
This reverts commit 8f9bf3f223.
Arm has a problem with tls after a fork. The pthread_key_create seems to
be forgotten?
Apple has a problem with the exit(0) code in do_fork(). An IO mutex
is still held after a fork().
While MacOS doesn't natively support the alias attribute, let's support
it with TCC anyway. This means we need to make a decision if the
string in the alias attribute is decorated or not due to the implicit
underscore on MacOS. To make life easier we decide that it's the C name,
i.e. without underscore, and so TCC needs to emit alias names with
underscore handling.
Irrespective of that the test case needs to deal with the underscore
itself for __asm__ renaming which is always requiring the assembler name.
