Hi! There is a patch for tcc and test program. If a tcc is not patched
(a call to the __bound_init() is inserted) then a call to the
__bound_init() leads to the crash of the compiled test (tcc -b test.c;
./a.out). Can someone explain while this happens even when
__bound_init() is a null function (does nothing)?
int main ()
{
#ifdef BOUNDS
int v[10]; // program will crash if compiled with -b option
#endif
return 0;
}
diff -urN tinycc.old/lib/bcheck.c tinycc/lib/bcheck.c
--- tinycc.old/lib/bcheck.c 2015-03-25 16:38:59.000000000 +0300
+++ tinycc/lib/bcheck.c 2015-03-25 16:40:34.000000000 +0300
@@ -343,6 +343,7 @@
}
}
+#if 0
void __bound_init(void)
{
int i;
@@ -419,6 +420,11 @@
p += 2;
}
}
+#else
+void __bound_init(void)
+{
+}
+#endif
void __bound_main_arg(void **p)
{
diff -urN tinycc.old/tccelf.c tinycc/tccelf.c
--- tinycc.old/tccelf.c 2015-03-25 16:38:59.000000000 +0300
+++ tinycc/tccelf.c 2015-03-25 16:39:25.000000000 +0300
@@ -1557,7 +1557,8 @@
add_elf_sym(symtab_section, 0, 0,
ELFW(ST_INFO)(STB_GLOBAL, STT_NOTYPE), 0,
bounds_section->sh_num, "__bounds_start");
-#ifdef TCC_TARGET_I386
+#if 0
+//#ifdef TCC_TARGET_I386
if (s1->output_type != TCC_OUTPUT_MEMORY) {
/* add 'call __bound_init()' in .init section */
init_section = find_section(s1, ".init");
_______________________________________________
Tinycc-devel mailing list
[email protected]
https://lists.nongnu.org/mailman/listinfo/tinycc-devel
