Commit Graph

108 Commits

Author SHA1 Message Date
herman ten brugge
3b617fdc53 Add sigsetjmp/siglongjmp bound checking support
tcctok.h:
- Add sigsetjmp/__sigsetjmp/siglongjmp

tccgen.c:
- redirect sigsetjmp/siglongjmp to bcheck.c code

i386-gen.c/x86_64-gen.c
- gcall_or_jmp: Set func_bound_add_epilog also when sigsetjmp is called
- gen_bounds_epilog: Only call __bound_local_new when needed (unrelated)

bcheck.c:
- Add __bound_siglongjmp
- __bound_setjmp/__bound_long_jump: Check no_checking
- Optimize __bound_local_delete (unrelated)

Modify testcase:
- 114_bound_signal
2020-05-25 12:26:55 +02:00
herman ten brugge
b5b92c7d6d Add setjmp/longjmp bound checking support
tcctok.h:
- Add __bound_setjmp/setjmp/_setjmp/longjmp

tccgen.c:
- redirect setjmp/longjmp to bcheck.c code

i386-gen.c/x86_64-gen.c
- Change func_bound_alloca_used into func_bound_add_epilog
- Set func_bound_add_epilog also when setjmp is called

bcheck.c:
- Add __bound_setjmp/__bound_longjmp
- __bound_local_delete: remove setjmp if used in function
- __bound_exit: clear setjmp list and print statistic
- make malloc_redir more readable (unrelated)

New testcases:
- 115_bound_setjmp
- 116_bound_setjmp2
2020-05-23 20:02:41 +02:00
Michael Matz
245f6a0d13 stdarg: always have the __builtin_va_* available
This makes available the __builtin_va_list type and __builtin variants
of va_start, va_arg, va_copy and va_end.  We do this via a header file
that's prepended to all compilations always (except if merely
preprocessing): tcc_predefs.h.  That header could also be used
for predefining other builtins in the future.

We don't need the define hacks for musl anymore with this.

Also fix x86_64 gfunc_prologue to reserve enoug space for the
full va_list structure, not just 16 bytes.
2020-04-15 22:06:52 +02:00
grischka
56db092ab7 bcheck cleanup
- 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.
2019-12-14 13:26:18 +01:00
herman ten brugge
39c0ff311d Add new bounds checking functions.
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.
2019-12-12 20:49:35 +01:00
herman ten brugge
4461f38a9e Fix bounds checking for linux/windows 2019-12-10 08:07:25 +01:00
herman ten brugge
800c3a5e0b Add constructor/destructor support 2019-10-29 07:02:58 +01:00
Michael Matz
982de78e8d riscv: implement stdarg functions
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.
2019-09-01 23:13:20 +02:00
Michael Matz
f44df9d85b riscv: some work on large function arguments
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.
2019-09-01 23:13:20 +02:00
matthias
5a0101856b add C11 _Static_assert support 2019-04-28 01:07:21 +02:00
Devin Hussey
9382a3ad58 C11 conformance: Add _Noreturn, stdnoreturn.h, and partial _Alignas support
_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>
2019-03-20 15:03:27 -04:00
matthias
0d91ba749c Add gcc attribute cleanup support
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:
}
2019-01-23 17:21:14 +01:00
Petr Skocik
070646b790 Recognize C11' _Alignof 2018-12-12 20:12:03 +01:00
Jonathan Newman
0edbed1d52 Implement __attribute__((nodecorate))
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.
2018-07-22 00:54:01 +01:00
grischka
da8c62f75d various stuff
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
2017-10-11 18:13:43 +02:00
grischka
69a137ff88 #pragma comment(option,"-..."), bitfields test, etc...
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"
2017-07-14 19:26:01 +02:00
Michael Matz
824dcebe59 tccpp: Implement __COUNTER__
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.
2017-07-09 05:30:47 +02:00
Matthias Gatto
157bad52cd add C11's _Generic
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.
2017-07-05 10:57:50 +02:00
grischka
3b84e61ead Revert "partial revert of the commit 4ad186c5ef61"
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.
2017-02-05 14:30:19 +01:00
Michael Matz
c4edfb4e08 tccasm: Implement .set sym, expr
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.
2016-12-15 17:47:10 +01:00
Michael Matz
8a1a2a6033 Implement __builtin_choose_expr
Follows GCC implementation.
2016-12-15 17:47:08 +01:00
Michael Matz
63e3ff7cca tccasm: Accept .balign 2016-12-15 17:47:07 +01:00
Michael Matz
c82e52d55b tccasm: Implement .pushsection and .popsection 2016-12-15 17:47:06 +01:00
grischka
02642bc94c lib/libtcc1.c: cleanup
- remove #include dependencies from libtcc1.c
  for easier cross compilation
- clear_cache only on ARM
- error-message for mprotect failure
2016-10-19 19:21:36 +02:00
grischka
f3c1ea6c2d #define __GNUC__ = 2.1
__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.
2016-10-15 16:01:16 +02:00
grischka
9c5bb16447 Revert part of "fix installation amd bcheck for Windows"
tccelf.c : force linking bcheck by adding elf symbol __bound_init
bcheck.c : use (size_t)1 for x86_64

Fixes 7e7e6148fd
2016-10-01 20:47:36 +02:00
seyko
1f49441a27 .rept asm directive
and '.' alone is a token now in *.S (not an identifier)
    representing a current position in the code (PC).
2016-04-22 18:29:56 +03:00
seyko
e010b1396b __builtin_expect no-op
Taken from David Mertens tcc branch on github
    https://github.com/run4flat/tinycc.git
2016-04-16 12:41:53 +03:00
seyko
6a49afb3ed correct version of "Identifiers can start and/or contain"
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'
2016-04-13 10:23:46 +03:00
seyko
131d776d66 revert of the 'Identifiers can start and/or contain'
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 '.'
2016-04-13 03:52:07 +03:00
seyko
d3e85e80fd Identifiers can start and/or contain '.' in *.S
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.
2016-04-05 10:43:50 +03:00
seyko
2bf43b5483 reverse of the "Identifiers can start and/or contain '.'"
- 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
2016-04-03 11:01:05 +03:00
Vlad Vissoultchev
aa1ed616eb Move all GAS directives under TOK_ASMDIR prefix to include leading '.'
Use only these tokens in `asm_parse_directive` and don't recycle others' tokens (like TOK_SECTION1)
2016-03-15 10:00:50 +02:00
Edmund Grimley Evans
eb00777309 tcctok.h: Put TOK_memmove in the correct places (I hope).
This should have been part of b051549. Someone should test on ARM.
2015-11-05 19:37:04 +00:00
Edmund Grimley Evans
7f0b798418 tcctok.h: Revert 41408f2, which moved TOK_memmove. 2015-11-05 19:33:46 +00:00
seyko
41408f2104 fix for the "tccgen.c: Use memmove for struct assignment"
./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
2015-11-05 20:24:04 +03:00
gus knight
89ad24e7d6 Revert all of my changes to directories & codingstyle. 2015-07-29 16:57:12 -04:00
gus knight
47e06c6d4e Reorganize the source tree.
* 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...
2015-07-27 16:03:25 -04:00
gus knight
41031221c8 Trim trailing spaces everywhere. 2015-07-27 12:43:40 -04:00
grischka
72e8ff11e9 tccpp: alternative #pragma push/pop_macro
using next_nomacro() so that for example
    #define push_macro foobar
does not affect how the pragma works (same behavior
as gcc, albeit not MS's cl).
2015-04-23 23:27:36 +02:00
grischka
7c27186a83 Revert "* and #pragma pop_macro("macro_name")"
- 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.
2015-04-23 23:26:46 +02:00
seyko
b08ce88082 "#pragma once" implementation 2015-04-21 15:46:29 +03:00
seyko
0c8447db79 * and #pragma pop_macro("macro_name")
* 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.
2015-04-21 06:34:35 +03:00
Steven G. Messervey
aeaff94ec1 implement #pragma comment(lib,...) 2015-04-15 22:56:21 -04:00
Steven G. Messervey
e50d68e417 Revert "implement #pragma comment(lib,...)"
This reverts commit 8615bb40fb.

Reverting as it breaks on MinGW targets
2015-04-15 21:24:15 -04:00
Steven G. Messervey
8615bb40fb implement #pragma comment(lib,...) 2015-04-15 17:00:26 -04:00
seyko
e7a60e4d01 replace a method to force bcheck.o linking
* 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
2015-04-12 04:47:15 +03:00
Edmund Grimley Evans
d73b488401 arm64: Implement __clear_cache.
__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
2015-03-08 00:10:44 +00:00
Edmund Grimley Evans
238e760a29 Add __builtin_return_address.
Implementation is mostly shared with __builtin_frame_address.
It seems to work on arm64, i386 and x86_64. It may need to be
adapted for other targets.
2015-03-06 21:01:14 +00:00
seyko
664c19ad5e partial revert of the commit 4ad186c5ef
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;
    }
2015-03-04 16:25:51 +03:00