Commit Graph

279 Commits

Author SHA1 Message Date
Michael Matz
f15c0a9333 x86-64: fix shared libs
The introduction of read32le everywhere created a subtle issue, going
from
   x = *(int*)p;
to
   x = read32le(p);
is not equivalent if x is a larger than 32bit quantity, like an
address on x86_64, because read32le returns an unsigned int.  The first
sign extends, the latter zero extends.  This broke shared library
creation for gawk.  It's enough to amend the case of the above
situation, cases like "write32le(p, read32le(p) +- something)" are okay,
no extensions happen or matter.
2015-12-17 19:41:20 +01:00
Michael Matz
e264243adc x86-64: Define symbol constant for new relocs
Whoops, we have our own <elf.h> copy, so I can just as well add
the symbol defines for the relocs instead of hard-coding numbers
in tccelf.c.
2015-12-17 07:30:35 +01:00
Michael Matz
c4d0498b3a x86-64: Add support for new psABI relocations
R_X86_64_GOTPCRELX and R_X86_64_REX_GOTPCRELX can occur in object files
comiled by new binutils.  They are not dynamic relocations, so normally
wouldn't be a problem for tcc (one doesn't normally mix object files
created by different compiler/binutils, static archives are so out :)).
If it weren't for the glibc startup code, crt*.o, of course.  They now
do contain such relocs --> boom.  Handle them in the trivial way.
2015-12-17 07:17:34 +01:00
Edmund Grimley Evans
c7067aeb84 tccelf.c: On arm64, use read64le, and use uint64_t to check range. 2015-11-20 23:29:08 +00:00
Edmund Grimley Evans
553242c18a Replace pointer casts with calls to (read|write)(16|32|64)le.
This stops UBSan from giving runtime misaligned address errors
and might eventually allow building on a non-little-endian host.
2015-11-19 18:21:14 +00:00
Edmund Grimley Evans
c52128c581 tccelf.c: Avoid two trivial instances of undefined behaviour. 2015-11-09 22:57:58 +00:00
seyko
35e715a1e3 defined twice: revert
An error message is changed to suggest -fcommon
2015-10-29 17:10:04 +03:00
seyko
c07785a1ea comment out tcc_error_noabort("'%s' defined twice"...
gcc-3.4.6 don't give such error by default
    example file1
	char __version_303_xxxxxxxx;
	void func1() {}
    example file2
	char __version_303_xxxxxxxx;
	void func2() {}
	int main() { return 0; }
2015-10-25 00:41:17 +03:00
Edmund Grimley Evans
f0b7566181 tccelf.c: Reset sym after call to build_got.
The call to build_got can cause symtab_section->data to be reallocated
(build_got -> add_elf_sym -> put_elf_sym -> section_ptr_add ->
section_realloc -> tcc_realloc). This is not obvious on a cursory
inspection, but fortunately Valgrind spotted it immediately.
Are there other, similar bugs that Valgrind did not detect?
2015-10-16 20:33:41 +01:00
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
d6b64e2574 Clean up lots of rogue tabs.
Still some more tabs to be taken care of. arm-gen.c and tcccoff.c
have so many style issues that I'm just going to throw clang-format
at them.
2015-07-27 14:14:41 -04:00
gus knight
41031221c8 Trim trailing spaces everywhere. 2015-07-27 12:43:40 -04:00
grischka
30df3189b1 tccpp: fix issues, add tests
* fix some macro expansion issues
* add some pp tests in tests/pp
* improved tcc -E output for better diff'ability
* remove -dD feature (quirky code, exotic feature,
  didn't work well)

Based partially on ideas / researches from PipCet

Some issues remain with VA_ARGS macros (if used in a
rather tricky way).

Also, to keep it simple, the pp doesn't automtically
add any extra spaces to separate tokens which otherwise
would form wrong tokens if re-read from tcc -E output
(such as '+' '=')  GCC does that, other compilers don't.

 * cleanups
  - #line 01 "file" / # 01 "file" processing
  - #pragma comment(lib,"foo")
  - tcc -E: forward some pragmas to output (pack, comment(lib))
  - fix macro parameter list parsing mess from
    a3fc543459
    a715d7143d
    (some coffee might help, next time ;)
  - introduce TOK_PPSTR - to have character constants as
    written in the file (similar to TOK_PPNUM)
  - allow '\' appear in macros
  - new functions begin/end_macro to:
      - fix switching macro levels during expansion
      - allow unget_tok to unget more than one tok
  - slight speedup by using bitflags in isidnum_table

Also:
  - x86_64.c : fix decl after statements
  - i386-gen,c : fix a vstack leak with VLA on windows
  - configure/Makefile : build on windows (MSYS) was broken
  - tcc_warning: fflush stderr to keep output order (win32)
2015-05-09 14:29:39 +02:00
Philip
951a43ea6c fix a potential end-of-buffer issue in tccelf.c
also read characters one at a time when PARSE_DEBUG is set; after this
patch, things seem to work with that.
2015-04-30 21:35:21 +00:00
Thomas Preud'homme
9336fa7ae5 Fix program symbols exported in dynsym section
Prior to this commit TinyCC was exporting symbols defined in programs
only when they resolve an undefined symbol of a library. However, the
expected behavior (see --export-dynamic in GNU ld manpage) is that all
symbols used by libraries and defined by a program should be exported in
dynsym section. This is because symbol resolution search first in
program and then in libraries, thus allowing program symbol to interpose
symbol defined in a library.
2015-04-18 15:34:04 +08:00
seyko
0536407204 ability to specify a type of the input file with the -x switch
Usage example: tcc -xc ex5.cgi
    From a gcc docs:

    You can specify the input language explicitly with the -x option:

    -x language
    Specify explicitly the language for the following input files
    (rather than letting the compiler choose a default based on the file
    name suffix). This option applies to all following input files until
    the next -x option. Possible values for language are:

        c  c-header  c-cpp-output
        c++  c++-header  c++-cpp-output
        objective-c  objective-c-header  objective-c-cpp-output
        objective-c++ objective-c++-header objective-c++-cpp-output
        assembler  assembler-with-cpp
        ada
        f77  f77-cpp-input f95  f95-cpp-input
        java

    -x none
    Turn off any specification of a language, so that subsequent files
    are handled according to their file name suffixes (as they are if -x
    has not been used at all)
2015-04-12 15:35:37 +03:00
seyko
92efee6e52 fix "handle a -s option" commit
for targets which don't support variable length arrays.
2015-04-10 17:35:54 +03:00
seyko
559675b90a a bounds checking code for the ARCH=x86_64 2015-04-10 15:17:22 +03:00
seyko
7e7e6148fd fix installation amd bcheck for Windows
* define targetos=Windows when --enable-tcc32-mingw, --enable-cygwin, ...
    * use TARGETOS insteed HOST_OS when selecting PROGS
    * use "$(tccdir)" insteed $(tccdir) on install (spaces in path)
    * install tcc.exe too
    * produce bcheck.o when cross-compiling too (lib/Makefile)
    * force bcheck.o linking by compiling inside tcc_set_output_type()
      a dummy program with local array. Otherwise bcheck.o may be not linked.
    * replace %xz format specifier with %p in bcheck (don't supported on
      Windows)
    * call a __bound_init when __bound_ptr_add, __bound_ptr_indir,
      __bound_new_region, __bound_delete_region called.
      This is because a __bound_init inside ".init" section is not called
      on Windows for unknown reason.
    * print on stderr a message when an illegal pointer is returned:
        there is no segmentation violation on Windows for a program
        compiled with "tcc -b"
    * remove "C:" subdir on clean if $HOST_OS = "Linux"
    * default CFLAGS="-Wall -g -O0" insteed CFLAGS="-Wall -g -O2"
      to speed up compilation and more precise debugging.
2015-04-10 07:37:31 +03:00
seyko
5cd4393a54 handle a -s option by executing sstrip/strip program 2015-04-10 06:53:48 +03:00
seyko
089ce6235c output all sections if we produce an executable file
tcc w/o -g option generate an executable file which format
    is not recognized by binutils. It is like stripped one but
    binutils don't think so. Solution: generate not stripped
    file which can be correctly stripped by external utils.

    may be there is a need to handle a -s option and call
    a sstrip/strip program to do a job.
2015-04-10 06:49:24 +03:00
seyko
d80593bc4d fix for the bcheck.o (bug #14958)
- care about __attribute__ redefinition in the system headers
    - an invalid pointer must be returned when (addr >= e->size),
      and not (addr > e->size)

    A test program:
    #include <stdio.h>
    #include <stdlib.h>
    int main ()
    {
	int v[10];
	fprintf(stderr, "&v[0]  = %p\n", &v[0]);
	fprintf(stderr, "&v[10] = %p\n", &v[10]);
	exit(1);
	return 0;
    }
    // tcc -b test.c

    The output before a patch:
    &v[0]  = 0xbf929d8c
    &v[10] = 0xbf929db4

    The output after a patch:
    &v[0]  = 0xbff6e33c
    &v[10] = 0xfffffffe
2015-03-29 11:28:02 +03:00
seyko
f2cfc07554 fix: try to add a bounds.o only if __bounds_init not found
/usr/local/lib/tcc/i386/bcheck.o: error: '__bound_error_msg' defined twice
    #include <stdio.h>
    int main ()
    {
        #if 1
    	    int v[10];
            v[10] = 0;
            fprintf(stderr, "is bounds error catched?\n");
        #endif
        return 0;
    }
    // tcc -b test.c
2015-03-28 19:41:01 +03:00
seyko
acef4ff244 make a bound checking more compatible with Windows 64
On Linux 32:   sizeof(long)=32 == sizeof(void *)=32
    on Linux 64:   sizeof(long)=64 == sizeof(void *)=64
    on Windows 64: sizeof(long)=32 != sizeof(void *)=64
2015-03-26 07:47:45 +03:00
seyko
548a55eda5 fix for the previous commit: tcc_add_support() was used before definition 2015-03-26 06:22:37 +03:00
seyko
a105837aae fix: enforce bcheck.o linking when -b option is used
fixes a crash for the empry program (tcc -b empty.c)
    empty.c: int main() { return 0; }
2015-03-26 06:04:36 +03:00
seyko
8f6390061d fix for: x86_64-tcc compiled by i386-tcc is wrong
A test program (must be compiled by the above version of the tcc):

    /* Tickle a bug in TinyC on 64-bit systems:
     * the LSB of the top word or ARGP gets set
     * for no obvious reason.
     *
     * Source: a legacy language interpreter which
     * has a little stack / stack pointer for arguments.
     *
     * Output is: 0x8049620 0x10804961c
     * Should be: 0x8049620 0x804961c
     */
    #include <stdio.h>
    #define NARGS 20000
    int ARG[NARGS];
    int *ARGSPACE = ARG;
    int *ARGP = ARG - 1;
    main() { printf("%p %p\n", ARGSPACE, ARGP); }
2015-03-23 19:24:55 +03:00
seyko
8dbe129ab7 fix a gcc compiler warning for the previous commit
mark a constant as long long (or -std=gnu99 is needed)
2015-03-23 16:36:09 +03:00
seyko
c2efd7c53b revert a commit: Work around for the issue TCC doesn't handle -2147483648 properly
because a tcc handle now -2147483648 properly. Look a commit:
    Make integer constant parsing C99 compliant
2015-03-23 15:31:10 +03:00
seyko
4ba7e5dc5a A correction for the commit: revert a grischka patch: gdb refused to know "main"
keep revert (check SHF_ALLOC) only for x86 target and keep a grishka patch for
other targets
2015-03-10 14:21:14 +03:00
Michael Matz
0ecee0072d Find libtcc1.a on arm32
The directory is called "arm", not "ARM".
2015-03-09 00:47:27 +01:00
Edmund Grimley Evans
3fb8b14806 tccelf.c: File path component is "arm64", not "ARM64". 2015-03-04 19:43:29 +00:00
seyko
d70440b406 A 32/64 bit tcc on linux: an arch specific path for libtcc1.a
Don't use /usr/local/lib/tcc/libtcc1.a for i386 and x86_64
A $(tccdir)/i386 directory was used to install a libtcc1.a
but only when cross compiling. And no x86_64 directory.
And this directory location was unknown inside tccelf.c
2015-03-03 18:34:22 +03:00
seyko
6cbf4fb740 tcc_add_runtime() for a CONFIG_USE_LIBGCC case: reducing a complexity 2015-03-03 17:11:18 +03:00
seyko
09d4e4f408 Revert a grischka patch: gdb refused to know "main"
It is a strange patch because before this commit a gdb is working well
and after this commit there is exactly the same problem on Linux:
gdb refuses to know "main"

    Author: grischka <grischka>
    Date:   Tue Feb 5 21:18:29 2013 +0100
    tccelf: fix debug section relocation
    With:
       tcc -g hello.c
       gdb a.out
         b main
    gdb refused to know "main" because of broken dwarf info.
2015-03-03 14:39:27 +03:00
Michael Matz
6d055312a2 aarch64: Fix -run.
This adds some more support for properly transfering some
offsets over the different stages of a relocations life.
Still not at all psABI compliant and DSOs can't yet be generated.
But it runs the testsuite in qemu-arm64.
2015-02-23 22:51:10 +00:00
Edmund Grimley Evans
b14ef0e24b Add arm64 (AArch64) as a target architecture. 2015-02-23 22:51:03 +00:00
Edmund Grimley Evans
738606dbd5 Use RELA relocations properly for R_DATA_PTR on x86_64.
libtcc.c: Add greloca, a generalisation of greloc that takes an addend.
tcc.h: Add greloca and put_elf_reloca.
tccelf.c: Add put_elf_reloca, a generalisation of put_elf_reloc.
tccgen.c: On x86_64, use greloca instead of greloc in init_putv.
2015-02-21 21:29:03 +00:00
Matteo Cypriani
63376d7712 tccelf: layout_sections: add missing param strsec
This fixes compilation on (k)FreeBSD.
2014-09-07 12:04:53 -04:00
grischka
6e0a658e96 win64: try to fix linkage
- revert to R_X86_64_PC32 for near calls on PE
- revert to s1->section_align set to zero by default

Untested. Compared to release_0_9_26 the pe-image looks back to
normal.  There are some differences in dissassembly (r10/r11 usage)
but maybe that's ok.
2014-06-24 22:09:12 -04:00
Michael Matz
e69c506617 x86_64: Handle PLT relocs to hidden symbols
For calls to hidden symbols we don't need a PLT slot, rewrite
the reloc into PC32.
2014-04-14 04:58:05 +02:00
Michael Matz
6a947d9d26 ELF: Remove traces of old RUNTIME_PLTGOT code
The last users of it went away, no use in keeping
this code.
2014-04-06 01:59:35 +02:00
Michael Matz
01c0419234 arm: Use proper PLT/GOT for -run.
Same as with x86_64, disable the runtime_plt_and_got hack
for -run on arm as well.  For that we need to handle several
relocations as (potentially) generating PLT slots as well.
Tested with mpfr-3.1.2 and gawk (both using --disable-shared),
there are two resp. five pre-existing problems, so no regressions.

This also works toward enabling real shared libs for arm,
but it's not there yet.
2014-04-06 01:50:35 +02:00
Michael Matz
9750d0b725 x86_64: Create proper PLT and GOT also for -run
This makes us use the normal PLT/GOT codepaths also for -run,
which formerly used an on-the-side blob for the jump tables.
For x86_64 only for now, arm coming up.
2014-04-06 00:30:22 +02:00
Michael Matz
0688afdd34 arm: Handle R_ARM_NONE relocs
These relocations are used to express a dependency on a certain
symbol (e.g. for EABIs exception handling to the
__aeabi_unwind_cpp_pr{0,1,2} routines).  Just ignore them in
reloc processing.
2014-04-04 23:33:04 +02:00
Michael Matz
2024c44541 run: Always create .got relocs
When output is memory we applied the correct GOT offset for certain
relocations (e.g. _GOT32), but we forgot to actually fill the got
entries with the final symbol values, so unconditionally create relocs
against .got as well.
2014-04-04 17:54:52 +02:00
Michael Matz
f2c8491fc0 ELF: Make first PT_LOAD cover headers
This makes it so that the first PT_LOAD segment covers
ELF and program header and .interp (contained in the same page anyway,
right before the start of the first loaded section).  binutils
strip creates invalid output otherwise (which strictly is a binutils
bug, but let's be nice anyway).
2014-04-03 18:00:44 +02:00
Michael Matz
0bd1282059 x86-64: shared libs improvement
This correctly resolves local references to global functions from
shared libs to their PLT slot (instead of directly to the target
symbol), so that interposition works.

This is still not 100% conforming (executables don't export symbols
that are also defined in linked shared libs, as they must), but
normal shared lib situations work.
2014-03-31 05:36:12 +02:00
Michael Matz
080ad7e62a x86-64: Add basic shared lib support
Initial support for shared libraries on x86-64.
2014-03-31 03:45:35 +02:00
Thomas Preud'homme
b018bac9c8 Fix again GOT32 + PLT32 reloc commit
Fix commit aa561d7011 by setting
has_plt_entry once the plt has been created, not before.
2014-03-29 14:46:26 +08:00
mingodad
5c233f2cf3 The hack to allow valgrind works with tcc compiled programs
have the undesired side effect of programs compiled with
debug info segfaulting after debug info been striped
more tought must be done here
2014-03-28 21:07:06 +00:00
mingodad
0ba7c8670c This allow valgrind to work on linux, some how the PHDR is missing and then valgrind complain with:
Inconsistency detected by ld.so: rtld.c: 1284: dl_main: Assertion `_rtld_local._dl_rtld_map.l_libname' failed!
2014-03-28 11:44:00 +00:00
Thomas Preud'homme
aa561d7011 Simplify and fix GOT32 + PLT32 reloc commit
Introduce a new attribute to check the existence of a PLT entry for a
given symbol has the presence of an entry for that symbol in the dynsym
section is not proof that a PLT entry exists.

This fixes commit dc8ea93b13.
2014-03-26 23:13:28 +08:00
mingodad
ad9568060e A possible fix for the memory leak reported by valgrind when running tcctest.c with tcc. 2014-03-25 18:06:14 +00:00
Thomas Preud'homme
dc8ea93b13 Support GOT32 and PLT32 reloc for same symbol
Some symbol (such as __gmon_start__ but this one does not matter to tcc)
can have both a R_386_GOT32 and R_386_PLT32 relocation. It is thus not
enough to test if a GOT reloc was already done when deciding whether to
return early from put_got_entry.
2014-03-25 22:35:11 +08:00
Thomas Preud'homme
078ba241d9 Always link libtcc1.a in (useful for va_* on x86)
On x86 tcc call to function in libtcc1.a to implement va_* functions.
2014-03-25 21:18:57 +08:00
Thomas Preud'homme
ec1c83081d Fix relocation of __bound_init
When bound check is enabled, tcc tries to relocate a call to
__bound_init in _init. This means that relocation (in tcc_add_bcheck)
must be done after libtcc1.a (which countains __bound_init) is loaded
but before crtn.o is loaded as this finalize _init.
2014-03-17 23:14:38 +08:00
Thomas Preud'homme
b2192fc50b Adjust relocation offset for thumb to ARM veneer 2014-03-11 21:45:52 +08:00
Thomas Preud'homme
62d1da1b3e Fix warning of clang 2014-03-09 22:54:30 +08:00
Thomas Preud'homme
361ec4f98e Call fill_got_entry unconditionally
Call fill_got_entry unconditionally from fill_got so as to avoid
warnings on !x86-64 architectures. This can be done since this code path
is only followed by x86-64 architecture anyway.
2014-02-10 21:35:00 +08:00
Thomas Preud'homme
e571850d79 Add support of Thumb to ARM branch relocation 2014-02-06 21:38:24 +08:00
Thomas Preud'homme
4aec2902ca Split elf_output_file in smaller functions 2014-02-06 19:38:28 +08:00
Thomas Preud'homme
55f751ac6d Add macro to browse reloc and sym entries
Introduce for_each_elem to browse relocation entries and symbols of a
section.
2014-02-06 19:38:24 +08:00
Thomas Preud'homme
2eb844f8b5 Revert "Add macro to browse reloc and sym entries"
This reverts commit 3cbc7a2dcc.
2014-02-02 20:02:12 +08:00
Thomas Preud'homme
e5a706a091 Revert "Split elf_output_file in smaller functions"
This reverts commit b5b82df3e3.
2014-02-02 20:02:11 +08:00
Thomas Preud'homme
f62e97e0ed Revert "Add support of Thumb to ARM branch relocation"
This reverts commit 8635939b8d.
2014-02-02 20:02:08 +08:00
Thomas Preud'homme
8635939b8d Add support of Thumb to ARM branch relocation 2014-02-02 17:23:15 +08:00
Thomas Preud'homme
b5b82df3e3 Split elf_output_file in smaller functions 2014-02-02 17:23:15 +08:00
Thomas Preud'homme
3cbc7a2dcc Add macro to browse reloc and sym entries
Introduce for_each_elem to browse relocation entries and symbols of a
section.
2014-02-02 17:23:15 +08:00
Thomas Preud'homme
599677a5e2 Give ARM asm mnemonic of PLT entries
Give ARM assembly mnemonic of PLT entries in put_got_entry
2014-02-02 17:23:15 +08:00
Thomas Preud'homme
3d4b57ffe3 Clean tccelf.c
- remove debug printf and commented out code
- remove C++-like comments
- remove whitespace at end of lines
- replace tabs by spaces
2014-02-02 17:23:14 +08:00
Thomas Preud'homme
da0601e490 Remove WITHOUT_LIBTCC macro: no more user 2014-01-08 21:32:53 +08:00
Thomas Preud'homme
3352cb8aef Shared libraries also have entry points
This fix commit 32734680cb
2014-01-08 18:10:02 +08:00
Thomas Preud'homme
32734680cb Improve ELF on ARM
* set whether soft or hardfloat calling convention is used
* mark ELF file has having an entry point when there is
2014-01-08 17:59:16 +08:00
Thomas Preud'homme
28f0286479 Update elf.h 2014-01-08 17:38:31 +08:00
Thomas Preud'homme
b6247d1f3c Add support for runtime selection of float ABI 2014-01-08 15:00:52 +08:00
grischka
4ad186c5ef i386: use __fixdfdi instead of __tcc_cvt_ftol
Variants __fixsfdi/__fixxfdi are not needed for now because
the value is converted to double always.

Also:
- remove __tcc_fpinit for unix as it seems redundant by the
  __setfpucw call in the startup code
- avoid reference to s->runtime_main in cross compilers
- configure: fix --with-libgcc help
- tcctok.h: cleanup
2014-01-06 19:07:08 +01:00
Thomas Preud'homme
9e79b18bca Use libtcc.a for static link even with USE_LIBGCC
When statically linking, runtime library should be static as well. tcc
could link with libgcc.a but it's in a gcc version specific directory.
Another solution, followed by this patch, is to use libtcc.a when
statically linking, even if USE_LIBGCC was configured.
2014-01-03 18:20:51 +08:00
Thomas Preud'homme
1b606d1884 Allow thumb transition for R_ARM_PC24
Allow bl -> blx conversion in the case of R_ARM_PC24 relocation with
instruction being an unconditional bl. Also make spacing more uniform.
2013-11-18 00:03:38 +08:00
Thomas Preud'homme
cf02f920c1 Revert "Add support for thread-local storage variables"
TLS support in tinyCC is absolutely not ready:
- segment register not select in load and store
- no relocation added for computing offset of per-thread symbol
- no support for TLS-specific relocations
- no program header added as per Drepper document about TLS

This reverts commit 1c4afd1350.
2013-11-03 18:55:54 +08:00
Thomas Preud'homme
1c4afd1350 Add support for thread-local storage variables 2013-10-29 22:10:02 +08:00
Urs Janssen
0bdbd49eac add version number to manpage
avoid c++/c99 style comments in preprocessor directives
avoid leadings whitespaces in preprocessor directives
mention implemented variable length arrays in documentation
fixed ambiguous option in texi2html call (Austin English)
2013-02-17 00:48:51 +01:00
grischka
05108a3b0a libtcc: new LIBTCCAPI tcc_set_options(TCCState*, const char*str)
This replaces       -> use instead:
-----------------------------------
- tcc_set_linker    -> tcc_set_options(s, "-Wl,...");
- tcc_set_warning   -> tcc_set_options(s, "-W...");
- tcc_enable_debug  -> tcc_set_options(s, "-g");

parse_args is moved to libtcc.c (now tcc_parse_args).

Also some cleanups:
- reorder TCCState members
- add some comments here and there
- do not use argv's directly, make string copies
- use const char* in tcc_set_linker
- tccpe: use fd instead of fp

tested with -D MEM_DEBUG: 0 bytes left
2013-02-12 19:13:28 +01:00
grischka
d6d7686b60 tcc.h: declare CValue.tab[LDOUBLE_SIZE/4]
Should fix some warnings wrt. access out of array bounds.

tccelf.c: fix "static function unused" warning
x86_64-gen.c: fix "ctype.ref uninitialzed" warning and cleanup
tcc-win32.txt: remove obsolete limitation notes.
2013-02-08 19:07:11 +01:00
grischka
7a477d70ca lib/Makefile: use CC, add bcheck to libtcc1.a
Also:
- fix "make tcc_p" (profiling version)
- remove old gcc flags:
  -mpreferred-stack-boundary=2 -march=i386 -falign-functions=0
- remove test "hello" for Darwin (cannot compile to file)
2013-02-06 19:01:07 +01:00
grischka
92024ab07a tccelf: fix debug section relocation
With:
   tcc -g hello.c
   gdb a.out
     b main
gdb refused to know "main" because of broken dwarf info.

This partially reverts commit 0d598aca08.
I don't remember what the problem was but it was the wrong way
to fix it.
2013-02-05 21:18:29 +01:00
grischka
e0aee4f455 portability: make tcc_get_symbol() available for non-native
For consistency with tcc_add_symbol().
Use uintptr_t here also.
2013-02-04 20:57:57 +01:00
grischka
82bcbd027f portability: fix void* <-> target address conversion confusion
- #define addr_t as ElfW(Addr)
- replace uplong by addr_t
- #define TCC_HAS_RUNTIME_PLTGOT and use it
2013-02-04 16:24:59 +01:00
Thomas Preud'homme
ae33c30b49 Revert "Don't call elf_hash on NULL value"
This reverts commit 505329b5b3.
2013-01-31 13:43:04 +01:00
grischka
2f6b8469cc safety: replace occurrences of strcpy by pstrcpy 2013-01-31 13:23:19 +01:00
Domingo Alvarez Duarte
505329b5b3 Don't call elf_hash on NULL value
Make sur elf_hash is never invoked with a NULL value.

Signed-off-by: Thomas Preud'homme <robotux@celest.fr>
2013-01-31 12:07:20 +01:00
Thomas Preud'homme
bcac413c30 Fix overflow detection in ARM relocation
Fix overflow detection for R_ARM_CALL, R_ARM_PC24, R_ARM_JUMP24 and
R_ARM_PLT32 relocations on ARM. 26 bits means 25 bits for positive and
negative offsets !
2013-01-28 19:13:25 +01:00
Thomas Preud'homme
f8cde52984 Link STT_GNU_IFUNC into STT_FUNC in executable.
Indirect functions shall have STT_FUNC type in executable dynsym
section. Indeed, a dlsym call following a lazy resolution would pick the
symbol value from the executable dynsym entry. This would contain the
address of the function wanted by the caller of dlsym instead of the
address of the function that would return that address.
2013-01-25 20:06:51 +01:00
Thomas Preud'homme
8c56b0cf90 Revert "Added what I call virtual io to tinycc this way we can make a monolitic executable or library that contains all needed to compile programs, truly tinycc portable."
This reverts commit 59e18aee0e.
tcc is being stabilized now in order to do a new release soon.
Therefore, such a change is not appropriate now.
2013-01-14 17:34:07 +01:00
mingodad
59e18aee0e Added what I call virtual io to tinycc this way we can make a monolitic executable or library that contains all needed to compile programs, truly tinycc portable.
Tested under linux exec the "mk-it" shell script and you'll end up with a portable tinycc executable that doesn't depend on anything else.
2013-01-11 00:04:38 +00:00
Thomas Preud'homme
e2212738d4 Generate PLT thumb stub only when necessary
Generate PLT thumb stub for an ARM PLT entry only when at least one
Thumb instruction branches to that entry. This is a rewrite of the
previous patch.
2012-11-17 10:01:11 +01:00
Thomas Preud'homme
1af3bca4ea Revert "Generate PLT thumb stub only when necessary"
Revert commit 891dfcdf3f since it assumes
*all* architectures supported by tcc have GOT offsets aligned on 2. A
rework of this commit is being done since without it all PLT entries
grow by 4 bytes.
2012-11-12 23:14:21 +01:00
Thomas Preud'homme
14c99236da Call to veneers in ARM mode
Since commit c6630ef92a, Call to a veneer
when the final symbol to be reached is thumb is made through a blx
instruction. This is a mistake since veneers are ARM instructions and
should thus be called with a simple bl. This commit prevent the bl ->
blx conversion when a veneer is used.
2012-11-09 10:59:06 +01:00
Thomas Preud'homme
891dfcdf3f Generate PLT thumb stub only when necessary
Generate PLT thumb stub for an ARM PLT entry only when at least one
Thumb instruction branches to that entry.

Warning: To save space, this commit reuses the bit 0 of entries of
got_offsets array. The GOT offset is thus saved in a 31 bit value.
Make sure to divide by 2 (right shift by 1) an offset before storing it
there and conversely to multiply the value by 2 (left shift by 1) before
using it.
2012-11-07 20:51:33 +01:00