Differential D26534 Diff 77578 head/lib/libc/gen/auxv.c

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head/lib/libc/gen/auxv.c

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	{			{

	if (&_DYNAMIC != NULL)			if (&_DYNAMIC != NULL)
	return;			return;
	_once(&aux_vector_once, init_aux_vector_once);			_once(&aux_vector_once, init_aux_vector_once);
	}			}

	static pthread_once_t aux_once = PTHREAD_ONCE_INIT;			static pthread_once_t aux_once = PTHREAD_ONCE_INIT;
	static int pagesize, osreldate, canary_len, ncpus, pagesizes_len, bsdflags;			static int pagesize, osreldate, ncpus, bsdflags;
				static size_t canary_len, pagesizes_len;
	static int hwcap_present, hwcap2_present;			static int hwcap_present, hwcap2_present;
	static char canary, pagesizes, *execpath;			static char canary, pagesizes, *execpath;
	static void ps_strings, timekeep;			static void ps_strings, timekeep;
	static u_long hwcap, hwcap2;			static u_long hwcap, hwcap2;

	#ifdef __powerpc__			#ifdef __powerpc__
	static int powerpc_new_auxv_format = 0;			static int powerpc_new_auxv_format = 0;
	static void _init_aux_powerpc_fixup(void);			static void _init_aux_powerpc_fixup(void);
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	#else			#else
	__weak_reference(_elf_aux_info, elf_aux_info);			__weak_reference(_elf_aux_info, elf_aux_info);
	#endif			#endif

	int			int
	_elf_aux_info(int aux, void *buf, int buflen)			_elf_aux_info(int aux, void *buf, int buflen)
	{			{
	int res;			int res;
				size_t buflen_;

	__init_elf_aux_vector();			__init_elf_aux_vector();
	if (__elf_aux_vector == NULL)			if (__elf_aux_vector == NULL)
	return (ENOSYS);			return (ENOSYS);
	_once(&aux_once, init_aux);			_once(&aux_once, init_aux);

				if (buflen < 0)
				return (EINVAL);
				buflen_ = (size_t)buflen;

	switch (aux) {			switch (aux) {
	case AT_CANARY:			case AT_CANARY:
	if (canary != NULL && canary_len >= buflen) {			if (canary != NULL && canary_len >= buflen_) {
	memcpy(buf, canary, buflen);			memcpy(buf, canary, buflen_);
	memset(canary, 0, canary_len);			memset(canary, 0, canary_len);
	canary = NULL;			canary = NULL;
	res = 0;			res = 0;
	} else			} else
	res = ENOENT;			res = ENOENT;
	break;			break;
	case AT_EXECPATH:			case AT_EXECPATH:
	if (execpath == NULL)			if (execpath == NULL)
	res = ENOENT;			res = ENOENT;
	else if (buf == NULL)			else if (buf == NULL)
	res = EINVAL;			res = EINVAL;
	else {			else {
	if (strlcpy(buf, execpath, buflen) >= buflen)			if (strlcpy(buf, execpath, buflen_) >= buflen_)
	res = EINVAL;			res = EINVAL;
	else			else
	res = 0;			res = 0;
	}			}
	break;			break;
	case AT_HWCAP:			case AT_HWCAP:
	if (hwcap_present && buflen == sizeof(u_long)) {			if (hwcap_present && buflen_ == sizeof(u_long)) {
	(u_long )buf = hwcap;			(u_long )buf = hwcap;
	res = 0;			res = 0;
	} else			} else
	res = ENOENT;			res = ENOENT;
	break;			break;
	case AT_HWCAP2:			case AT_HWCAP2:
	if (hwcap2_present && buflen == sizeof(u_long)) {			if (hwcap2_present && buflen_ == sizeof(u_long)) {
	(u_long )buf = hwcap2;			(u_long )buf = hwcap2;
	res = 0;			res = 0;
	} else			} else
	res = ENOENT;			res = ENOENT;
	break;			break;
	case AT_PAGESIZES:			case AT_PAGESIZES:
	if (pagesizes != NULL && pagesizes_len >= buflen) {			if (pagesizes != NULL && pagesizes_len >= buflen_) {
	memcpy(buf, pagesizes, buflen);			memcpy(buf, pagesizes, buflen_);
	res = 0;			res = 0;
	} else			} else
	res = ENOENT;			res = ENOENT;
	break;			break;
	case AT_PAGESZ:			case AT_PAGESZ:
	if (buflen == sizeof(int)) {			if (buflen_ == sizeof(int)) {
	if (pagesize != 0) {			if (pagesize != 0) {
	(int )buf = pagesize;			(int )buf = pagesize;
	res = 0;			res = 0;
	} else			} else
	res = ENOENT;			res = ENOENT;
	} else			} else
	res = EINVAL;			res = EINVAL;
	break;			break;
	case AT_OSRELDATE:			case AT_OSRELDATE:
	if (buflen == sizeof(int)) {			if (buflen_ == sizeof(int)) {
	if (osreldate != 0) {			if (osreldate != 0) {
	(int )buf = osreldate;			(int )buf = osreldate;
	res = 0;			res = 0;
	} else			} else
	res = ENOENT;			res = ENOENT;
	} else			} else
	res = EINVAL;			res = EINVAL;
	break;			break;
	case AT_NCPUS:			case AT_NCPUS:
	if (buflen == sizeof(int)) {			if (buflen_ == sizeof(int)) {
	if (ncpus != 0) {			if (ncpus != 0) {
	(int )buf = ncpus;			(int )buf = ncpus;
	res = 0;			res = 0;
	} else			} else
	res = ENOENT;			res = ENOENT;
	} else			} else
	res = EINVAL;			res = EINVAL;
	break;			break;
	case AT_TIMEKEEP:			case AT_TIMEKEEP:
	if (buflen == sizeof(void *)) {			if (buflen_ == sizeof(void *)) {
	if (timekeep != NULL) {			if (timekeep != NULL) {
	(void *)buf = timekeep;			(void *)buf = timekeep;
	res = 0;			res = 0;
	} else			} else
	res = ENOENT;			res = ENOENT;
	} else			} else
	res = EINVAL;			res = EINVAL;
	break;			break;
	case AT_BSDFLAGS:			case AT_BSDFLAGS:
	if (buflen == sizeof(int)) {			if (buflen_ == sizeof(int)) {
	(int )buf = bsdflags;			(int )buf = bsdflags;
	res = 0;			res = 0;
	} else			} else
	res = EINVAL;			res = EINVAL;
	break;			break;
	case AT_PS_STRINGS:			case AT_PS_STRINGS:
	if (buflen == sizeof(void *)) {			if (buflen_ == sizeof(void *)) {
	if (ps_strings != NULL) {			if (ps_strings != NULL) {
	(void *)buf = ps_strings;			(void *)buf = ps_strings;
	res = 0;			res = 0;
	} else			} else
	res = ENOENT;			res = ENOENT;
	} else			} else
	res = EINVAL;			res = EINVAL;
	break;			break;
	default:			default:
	res = ENOENT;			res = ENOENT;
	break;			break;
	}			}
	return (res);			return (res);
	}			}