- revert Makefiles to state before last bcheck additions
Instead, just load bcheck.o explicitly if that is
what is wanted.
- move tcc_add_bcheck() to the <target>-link.c files and
remove revently added arguments. This function is to
support tccelf.c with linking, not for tccgen.c to
support compilation.
- remove -ba option: It said:
"-ba Enable better address checking with bounds checker"
Okay, if it is better then to have it is not an option.
- remove va_copy. It is C99 and we try to stay C89 in tinycc
when possible. For example, MS compilers do not have va_copy.
- win64: revert any 'fixes' to alloca
It was correct as it was before, except for bound_checking
where it was not implemented. This should now work too.
- remove parasitic filename:linenum features
Such feature is already present with rt_printline in
tccrun.c. If it doesn't work it can be fixed.
- revert changes to gen_bounded_ptr_add()
gen_bounded_ptr_add() was working as it should before
(mostly). For the sake of simplicity I switched it to
CDECL. Anyway, FASTCALL means SLOWCALL with tinycc.
In exchange you get one addition which is required for
bounds_cnecking function arguments. The important thing
is to check them *BEFORE* they are loaded into registers.
New function gbound_args() does that.
In any case, code instrumentation with the bounds-check
functions as such now seems to work flawlessly again,
which means when they are inserted as NOPs, any code that
tcc can compile, seems to behave just the same as without
them.
What these functions then do when fully enabled, is a
differnt story. I did not touch this.
The following functions are now also bounds checked:
memcmp, strncpy, strcmp, strncmp, strcat, strchr, strdup.
Add statistics code for bounds checking functions.
The statistics can be printed by settings environment variable
"TCC_BOUNDS_PRINT_STATISTIC".
Enabled more tests in test/Makefile.
this also fixes passing of params > 16 bytes. In riscv
they aren't passed by value on stack, but via reference (and
because callees are allowed to modify by-ref params the caller must
allocate an own copy per call).
This fixes the stdarg parts of 73_arm.c.
like long double (16 bytes) and structs. Not completely
correct, but 73_arm64 somewhat works now (when the stdarg part
is disabled), though with some errors. What's definitely incorrect
is arguments of a mixed int/float struct. I'm using VT_LDOUBLE
(which conveniently has to be placed in a int-reg-pair) to load/store
structure arguments of size > 8 and <= 16, and that can lead to
overreads.
_Noreturn, just like __attribute__((noreturn)), is ignored.
I also added stdnoreturn.h, in all its glorious uselessness.
_Alignas only works for integer expressions right now. In order
to comply, we need:
- _Alignas(type) -> _Alignas(_Alignof(type)).
- stdalign.h as soon as it is done.
Note: DR 444 is supported; it works on struct members.
Signed-off-by: Devin Hussey <husseydevin@gmail.com>
The major difficulty was to handle cleanup when a goto happen
to do so, I've had a "ScopeTracker" struct.
I can't use local_scope because that would not work with code like below
as local_scope would be at the same level:
{
char * __attribute__ ((cleanup(clean_function))) str = "hej";
goto next;
}
{
next:
}
Prevent any decoration that would otherwise affect an exported
PE function. For example, given the following:
__declspec(dllexport) __stdcall
int decorated(int arg) {
return 0;
}
__declspec(dllexport) __stdcall __attribute__((nodecorate))
int undecorated(int arg) {
return 0;
}
The following exported functions can now be seen in the DLL:
_decorated@4
undecorated
The attribute is recognised for all targets but only
affects PE codegen. I'm not sure whether this would be
useful for other targets; its intended use was to allow
the creation of a DLL matching an existing set of signatures.
win32/Makefile ("for cygwin") removed
- On cygwin, the normal ./configure && make can be used with either
cygwin's "GCC for Win32 Toolchain"
./configure --cross-prefix=i686-w64-mingw32-
or with an existing tcc:
./configure --cc=<old-tccdir>/tcc.exe
tcctest.c:
- exclude test_high_clobbers() on _WIN64 (does not work)
tests2/95_bitfield.c:
- use 'signed char' for ARM (where default 'char' is unsigned)
tests:
- remove -I "expr" diff option to allow tests with
busybox-diff.
libtcc.c, tcc.c:
- removed -iwithprefix option. It is supposed to be
combined with -iprefix which we don't have either.
tccgen.c:
- fix assignments and return of 'void', as in
void f() {
void *p, *q;
*p = *q:
return *p;
}
This appears to be allowed but should do nothing.
tcc.h, libtcc.c, tccpp.c:
- Revert "Introduce VIP sysinclude paths which are always searched first"
This reverts commit 1d5e386b0a.
The patch was giving tcc's system includes priority over -I which
is not how it should be.
tccelf.c:
- add DT_TEXTREL tag only if text relocations are actually
used (which is likely not the case on x86_64)
- prepare_dynamic_rel(): avoid relocation of unresolved
(weak) symbols
tccrun.c:
- for HAVE_SELINUX, use two mappings to the same (real) file.
(it was so once except the RX mapping wasn't used at all).
tccpe.c:
- fix relocation constant used for x86_64 (by Andrei E. Warentin)
- #ifndef _WIN32 do "chmod 755 ..." to get runnable exes on cygwin.
tccasm.c:
- keep forward asm labels static, otherwise they will endup
in dynsym eventually.
configure, Makefile:
- mingw32: respect ./configure options --bindir --docdir --libdir
- allow overriding tcc when building libtcc1.a and libtcc.def with
make XTCC=<tcc program to use>
- use $(wildcard ...) for install to allow installing just
a cross compiler for example
make cross-arm
make install
- use name <target>-libtcc1.a
build-tcc.bat:
- add options: -clean, -b bindir
tccpp.c:
* #pragma comment(option,"-some-option")
to set commandline option from C code. May work only
for some options.
libtcc.c:
* option "-d1..9": sets a 'g_debug' global variable.
(for development)
tests2/Makefile:
* new make targets: tests2.37 / tests2.37+
run single test from tests2, optionally update .expect
* new variable GEN-ALWAYS to always generate certain .expects
* bitfields test
tccgen.c:
* bitfields: fix a bug and improve slightly more
* _Generic: ignore "type match twice"
This requires one more change in how macro arguments are expanded:
the standard requires that macro args are expanded before substituting
into the replacement list. This implies expanding them only once
even when they occur multiple times in the list. TCC expanded
them repeatedly in that case. Without __COUNTER__ that's harmless.
So, simply always expand arguments (when used without # and ##) once
and store the resulting tokens.
Simple implementation, I'm not even sure to respect C standart here,
but it should work with most use case.
This add an case in unary(), and generate TokString depending of _Generic
controlling exression, use begin_macro to "push"
the generated TokString, then call unary() again before exiting the switch
so the just add token are reevaluate again.
There seems nothing wrong. With
int t1 = 176401255;
float f = 0.25;
int t2 = t1 * f; // 176401255 * 0.25 = 44100313.75
according to the arithmetic conversion rules, the number
176401255 needs to be converted to float, and the compiler
can choose either the nearest higher or nearest lower
representable number "in an implementation-defined manner".
Which may be 176401248 or 176401264. So as result both
44100312 and 44100313 are correct.
This reverts commit 664c19ad5e.
That, as well as "sym = expr", if expr contains symbols.
Slightly tricky because a definition from .set is overridable,
whereas proper definitions aren't.
This doesn't yet allow using this for override tricks from C
and global asm blocks because the symbol tables from C and asm
are separate.
__GNUC__ nowadays as macro seems to mean the "GNU C dialect"
rather than the compiler itself. See also
http://gcc.gnu.org/ml/gcc/2008-07/msg00026.html
This patch will probably cause problems of various kinds but
maybe we should try nonetheless.
A problem was in TOK_ASMDIR_text:
- sprintf(sname, ".%s", get_tok_str(tok1, NULL));
+ sprintf(sname, "%s", get_tok_str(tok1, NULL));
When tok1 is '.text', then sname is '..text'
When tccboot kernels compiles with
'Identifiers can start and/or', this kernel don't start.
It is hard to find what is wrong.
PS: there was no test for identifiers in *.S with '.'
modified version of the old one which don't allow '.'
in #define Identifiers. This allow correctly preprocess
the following code in *.S
#define SRC(y...) \
9999: y; \
.section __ex_table, "a"; \
.long 9999b, 6001f ; \
// .previous
SRC(1: movw (%esi), %bx)
6001:
A test included.
- Identifiers can start and/or contain '.' in PARSE_FLAG_ASM_FILE
- Move all GAS directives under TOK_ASMDIR prefix
This patches breaks compilation of the tccboot (linux 2.4.26
kernel). A test.S which fails with this patches:
#define SRC(y...) \
9999: y; \
.section __ex_table, "a"; \
.long 9999b, 6001f<---->; \
.previous
SRC(1:<>movw (%esi), %bx<------>)
// 029-test.S:7: error: macro 'SRC' used with too many args
./configure --enable-cross
make
tcc -o i386-tcc tcc.c
tcc -o x86_64-tcc tcc.c
tcc -o i386-win-tcc tcc.c
In file included from tcc.c:22:
In file included from libtcc.c:39:
tccgen.c:2580: error: 'TOK_memmove' undeclared
* Documentation is now in "docs".
* Source code is now in "src".
* Misc. fixes here and there so that everything still works.
I think I got everything in this commit, but I only tested this
on Linux (Make) and Windows (CMake), so I might've messed
something up on other platforms...
- pop_macro incorrect with initially undefined macro
- horrible implementation (tcc_open_bf)
- crashes eventually (abuse of Sym->prev_tok)
- the (unrelated) asm_label part is the opposite of a fix
(Despite of its name this variable has nothing to do with
the built-in assembler)
This reverts commit 0c8447db79.
* give warning if pragma is unknown for tcc
* don't free asm_label in sym_free(),
it's a job of the asm_free_labels().
The above pragmas are used in the mingw headers.
Thise pragmas are implemented in gcc-4.5+ and current
clang.
* define __bound_init as external_global_sym insteed of the compiling
a tiny program
* remove warning about buf[] when CONFIG_TCC_BCHECK is not defined
__clear_cache is defined in lib-arm64.c with a single call to
__arm64_clear_cache, which is the real built-in function and is
turned into inline assembler by gen_clear_cache in arm64-gen.c
A test program:
/* result of the new version inroduced in 4ad186c5ef: t2a = 44100312 */
#include<stdio.h>
int main() {
int t1 = 176401255;
float f = 0.25f;
int t2a = (int)(t1 * f); // must be 44100313
int t2b = (int)(t1 * (float)0.25f);
printf("t2a=%d t2b=%d \n",t2a,t2b);
return 0;
}
