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.
------------ libtest ------------
./libtcc_test lib_path=..
<string>:11: warning: implicit declaration of function 'printf'
<string>:13: warning: implicit declaration of function 'add'
------------ test3 ------------
tcctest.c:1982: warning: implicit declaration of function 'putchar'
tcctest.c:2133: warning: implicit declaration of function 'strlen'
- a warning: unnamed struct/union that defines no instances
- allow a nested named struct declaration w/o identifier
only when option -fms-extensions is used
- 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
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
The following program (errno.c) reports errno=2 when run
using "tcc -run errno.c"
#include <errno.h>
#include <stdio.h>
int main(void) { printf("errno=%d\n", errno); return 0; }
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); }
Force to use a NATIVE_DEFINES insteed of the DEFINES for the
native tcc. After this change we have on debian/ubuntu
# ./x86_64-tcc -vv
tcc version 0.9.26 (x86-64, Linux)
install: /usr/local/lib/tcc
crt:
/usr/lib/x86_64-linux-gnu
libraries:
/usr/lib/x86_64-linux-gnu
/usr/lib
/lib/x86_64-linux-gnu
/lib
/usr/local/lib/x86_64-linux-gnu
/usr/local/lib
include:
/usr/local/include/x86_64-linux-gnu
/usr/local/include
/usr/include/x86_64-linux-gnu
/usr/include
/usr/local/lib/tcc/include
elfinterp:
/lib64/ld-linux-x86-64.so.2
Before this change the output was
# ./x86_64-tcc -vv
tcc version 0.9.26 (x86-64, Linux)
install: /usr/local/lib/tcc
crt:
/usr/lib
libraries:
/usr/lib
/lib
/usr/local/lib
include:
/usr/local/include
/usr/include
/usr/local/lib/tcc/include
elfinterp:
/lib64/ld-linux-x86-64.so.2
This change don't fix a cross compilers
The following check in tccgen.c is removed
if (nocode_wanted)
tcc_error("statement expression in global scope");
This check is introduced in commit 5bcc3eed7b and breaks compilation
of the linux 2.4.26 kernel.
int i = i++ causes a segfault because of missing guard. Looking
recursively at all backend functions called from middle end several more
guard appeared to be missing.
i386-tcc.exe is a compiler for i386 Linux. A HOST_OS variable in Makefile is
introduced and used to select a native compiler (which one to name as tcc.exe)
Some structs are passed in registers. When they need more than
one the implementation of __va_arg on x86-64 didn't correctly account
for this. This fixes only the cases where the structs consist of
integer types, as there the register save area is consecutive.
Fixes some tests from 73_arm64.c, but still leaves those failing
that use floating point in the large-but-regpassed structs.
The common code to move a returned structure packed into
registers into memory on the caller side didn't take the
register size into account when allocating local storage,
so sometimes that lead to stack overwrites (e.g. in 73_arm64.c),
on x86_64. This fixes it by generally making gfunc_sret also return
the register size.
__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
More precisely, treat (0 << x) and so on as constant expressions, but
not if const_wanted as we do not want to allow "case (x*0):", ...
Do not optimise (0 / x) and (0 % x) here as x might be zero, though
for an architecture that does not generate an exception for division
by zero the back end might choose to optimise those.
a test program:
struct {
int a[2], b[2];
} cases[] = {
{ ((int)0), (((int)0)) },
((int)0), (((int)0)) /* error: ',' expected (got ")") */
};
int main() { return 0; }
This commit allow to skip ')' in the decl_initializer() and to see ','
