void
__start(int argc, char **argv, char **envp,
void (*cleanup)(void), /* from shared loader */
const Obj_Entry *obj, /* from shared loader */
struct ps_strings *ps_strings)
{
environ = envp;
if ((__progname = argv[0]) != NULL) { /* NULL ptr if argc = 0 */
if ((__progname = _strrchr(__progname, '/')) == NULL)
__progname = argv[0];
else
__progname++;
}
if (ps_strings != (struct ps_strings *)0)
__ps_strings = ps_strings;
#ifdef DYNAMIC
if (&_DYNAMIC != NULL)
_rtld_setup(cleanup, obj);
#endif
#ifdef MCRT0
atexit(_mcleanup);
monstartup((u_long)&_eprol, (u_long)&_etext);
#endif
atexit(_fini);
_init();
exit(main(argc, argv, environ));
}
void
_start(int argc, char **argv, char **envp,
const Obj_Entry *obj, /* from shared loader */
void (*cleanup)(void), /* from shared loader */
struct ps_strings *ps_strings) /* NetBSD extension */
{
char *namep;
/*
* Initialize the Small Data Area registers.
* _SDA_BASE is defined in the SVR4 ABI for PPC.
*
* Do the initialization in a PIC manner.
*/
__asm(
"bcl 20,31,1f;"
"1: mflr 11;"
"addis 13,11,rtld_SDA_BASE_-1b@ha;"
"addi 13,13,rtld_SDA_BASE_-1b@l;"
::: "lr" );
if ((namep = argv[0]) != NULL) { /* NULL ptr if argc = 0 */
if ((__progname = _strrchr(namep, '/')) == NULL)
__progname = namep;
else
__progname++;
}
environ = envp;
if (ps_strings != (struct ps_strings *)0)
__ps_strings = ps_strings;
#ifdef DYNAMIC
if (&rtld_DYNAMIC != NULL)
_rtld_setup(cleanup, obj);
#endif
_libc_init();
#ifdef MCRT0
atexit(_mcleanup);
monstartup((u_long)&_eprol, (u_long)&_etext);
#endif
atexit(_fini);
_init();
exit(main(argc, argv, environ));
}
void
_start(int argc, char **argv, char **envp,
const Obj_Entry *obj, /* from shared loader */
void (*cleanup)(void), /* from shared loader */
struct ps_strings *ps_strings) /* NetBSD extension */
{
char *namep;
/*
* Initialize the Small Data Area registers.
* _SDA_BASE is defined in the SVR4 ABI for PPC.
* _SDA2_BASE is defined in the E[mbedded] ABI for PPC.
*/
__asm( "lis %r13,_SDA_BASE_@ha;"
"addi %r13,%r13,_SDA_BASE_@l;"
"lis %r2,_SDA2_BASE_@ha;"
"addi %r2,%r2,_SDA2_BASE_@l" );
if ((namep = argv[0]) != NULL) { /* NULL ptr if argc = 0 */
if ((__progname = _strrchr(namep, '/')) == NULL)
__progname = namep;
else
__progname++;
}
environ = envp;
if (ps_strings != (struct ps_strings *)0)
__ps_strings = ps_strings;
#ifdef DYNAMIC
if (&_DYNAMIC != NULL)
_rtld_setup(cleanup, obj);
#endif
#ifdef MCRT0
atexit(_mcleanup);
monstartup((u_long)&_eprol, (u_long)&_etext);
#endif
atexit(_fini);
_init();
exit(main(argc, argv, environ));
}
void
___start(char **sp,
void (*cleanup)(void), /* from shared loader */
const Obj_Entry *obj, /* from shared loader */
struct ps_strings *ps_strings)
{
long argc;
char **argv, *namep;
argc = *(long *)sp;
argv = sp + 1;
environ = sp + 2 + argc; /* 2: argc + NULL ending argv */
if ((namep = argv[0]) != NULL) { /* NULL ptr if argc = 0 */
if ((__progname = _strrchr(namep, '/')) == NULL)
__progname = namep;
else
__progname++;
}
if (ps_strings != (struct ps_strings *)0 &&
ps_strings != (struct ps_strings *)0xbabefacedeadbeef)
__ps_strings = ps_strings;
#ifdef DYNAMIC
if (&rtld_DYNAMIC != NULL)
_rtld_setup(cleanup, obj);
#endif
_libc_init();
#ifdef MCRT0
atexit(_mcleanup);
monstartup((u_long)&_eprol, (u_long)&_etext);
#endif
atexit(_fini);
_init();
exit(main(argc, argv, environ));
}
static void
___start(struct ps_strings *ps_strings,
void (*cleanup)(void), /* from shared loader */
const Obj_Entry *obj, /* from shared loader */
int dp)
{
int argc;
char **argv;
int fini_plabel[2];
argc = ps_strings->ps_nargvstr;
argv = ps_strings->ps_argvstr;
environ = ps_strings->ps_envstr;
if ((__progname = argv[0]) != NULL) { /* NULL ptr if argc = 0 */
if ((__progname = _strrchr(__progname, '/')) == NULL)
__progname = argv[0];
else
__progname++;
}
if (ps_strings != (struct ps_strings *)0)
__ps_strings = ps_strings;
#ifdef DYNAMIC
/*
* XXX fredette - when not compiling PIC, you currently
* can't detect an undefined weak symbol by seeing if
* its address is NULL. The compiler emits code to find
* _DYNAMIC relative to %dp, the assembler notes the
* needed relocations, but when the linker sees that the
* (weak) symbol isn't defined it drops the ball - the
* relocations are never filled, and the binary ends up
* with code that sees an address of %dp plus zero,
* which != NULL.
*
* Arguably the linker could/should distinguish between
* code that is after a weak undefined symbol's contents
* from code that is after its address. In the first case,
* it would warn and/or bail. In the second case, it
* would fix up instructions to give a symbol address
* of NULL.
*
* For now, we take the easy way out and compare &_DYNAMIC
* to %dp, as well as to NULL.
*/
if (&_DYNAMIC != NULL && (int)&_DYNAMIC != dp)
_rtld_setup(cleanup, obj);
#endif
#ifdef MCRT0
atexit(_mcleanup);
monstartup((u_long)&_eprol, (u_long)&_etext);
#endif
/*
* Since crt0.o, crtbegin.o, and crtend.o are always
* compiled PIC, they must have %r19 set correctly on
* entry to any function they contain. However, when
* a program is linked statically, the linker does
* not fill a PLABEL relocation with a pointer to a
* true PLABEL, it just fills it with the offset of the
* function. This shows the linker's assumption that
* when linking statically, *all* of the code has *not*
* been compiled PIC. I guess to assume otherwise
* would be a performance hit, as you would end up
* with unnecessary PLABELs for function pointers.
*
* But here, passing the address of the PIC _fini to
* atexit, we must make sure that we pass a PLABEL.
*/
fini_plabel[0] = (int)_fini;
if (fini_plabel[0] & 2)
/* _fini is already a PLABEL. */
atexit(_fini);
else {
fini_plabel[1] = dp;
atexit((void (*)(void))(((int)fini_plabel) | 2));
}
_init();
exit(main(argc, argv, environ));
}
