Differential D15341 Diff 42304 head/libexec/rtld-elf/rtld.c

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head/libexec/rtld-elf/rtld.c

Show First 20 Lines • Show All 232 Lines • ▼ Show 20 Lines
int _rtld_addr_phdr(const void , struct dl_phdr_info ) __exported;		int _rtld_addr_phdr(const void , struct dl_phdr_info ) __exported;
int _rtld_get_stack_prot(void) __exported;		int _rtld_get_stack_prot(void) __exported;
int _rtld_is_dlopened(void *) __exported;		int _rtld_is_dlopened(void *) __exported;
void _rtld_error(const char *, ...) __exported;		void _rtld_error(const char *, ...) __exported;

int npagesizes, osreldate;		int npagesizes, osreldate;
size_t *pagesizes;		size_t *pagesizes;

long __stack_chk_guard[8] = {0, 0, 0, 0, 0, 0, 0, 0};

static int stack_prot = PROT_READ \| PROT_WRITE \| RTLD_DEFAULT_STACK_EXEC;		static int stack_prot = PROT_READ \| PROT_WRITE \| RTLD_DEFAULT_STACK_EXEC;
static int max_stack_flags;		static int max_stack_flags;

/*		/*
* Global declarations normally provided by crt1. The dynamic linker is		* Global declarations normally provided by crt1. The dynamic linker is
* not built with crt1, so we have to provide them ourselves.		* not built with crt1, so we have to provide them ourselves.
*/		*/
char *__progname;		char *__progname;
▲ Show 20 Lines • Show All 104 Lines • ▼ Show 20 Lines	_rtld(Elf_Addr sp, func_ptr_type exit_proc, Obj_Entry **objp)
const Elf_Phdr *phdr;		const Elf_Phdr *phdr;
Objlist initlist;		Objlist initlist;
RtldLockState lockstate;		RtldLockState lockstate;
struct stat st;		struct stat st;
Elf_Addr *argcp;		Elf_Addr *argcp;
char *argv, argv0, env, envp, kexecpath, library_path_rpath;		char *argv, argv0, env, envp, kexecpath, library_path_rpath;
caddr_t imgentry;		caddr_t imgentry;
char buf[MAXPATHLEN];		char buf[MAXPATHLEN];
int argc, fd, i, mib[2], phnum, rtld_argc;		int argc, fd, i, phnum, rtld_argc;
size_t len;
bool dir_enable, explicit_fd, search_in_path;		bool dir_enable, explicit_fd, search_in_path;

/*		/*
* On entry, the dynamic linker itself has not been relocated yet.		* On entry, the dynamic linker itself has not been relocated yet.
* Be very careful not to reference any global data until after		* Be very careful not to reference any global data until after
* init_rtld has returned. It is OK to reference file-scope statics		* init_rtld has returned. It is OK to reference file-scope statics
* and string constants, and to call static and global functions.		* and string constants, and to call static and global functions.
*/		*/
Show All 21 Lines	if (auxp->a_type < AT_COUNT)
init_rtld((caddr_t) aux_info[AT_BASE]->a_un.a_ptr, aux_info);		init_rtld((caddr_t) aux_info[AT_BASE]->a_un.a_ptr, aux_info);

__progname = obj_rtld.path;		__progname = obj_rtld.path;
argv0 = argv[0] != NULL ? argv[0] : "(null)";		argv0 = argv[0] != NULL ? argv[0] : "(null)";
environ = env;		environ = env;
main_argc = argc;		main_argc = argc;
main_argv = argv;		main_argv = argv;

if (aux_info[AT_CANARY] != NULL &&
aux_info[AT_CANARY]->a_un.a_ptr != NULL) {
i = aux_info[AT_CANARYLEN]->a_un.a_val;
if (i > sizeof(__stack_chk_guard))
i = sizeof(__stack_chk_guard);
memcpy(__stack_chk_guard, aux_info[AT_CANARY]->a_un.a_ptr, i);
} else {
mib[0] = CTL_KERN;
mib[1] = KERN_ARND;

len = sizeof(__stack_chk_guard);
if (sysctl(mib, 2, __stack_chk_guard, &len, NULL, 0) == -1 \|\|
len != sizeof(__stack_chk_guard)) {
/* If sysctl was unsuccessful, use the "terminator canary". */
((unsigned char )(void )__stack_chk_guard)[0] = 0;
((unsigned char )(void )__stack_chk_guard)[1] = 0;
((unsigned char )(void )__stack_chk_guard)[2] = '\n';
((unsigned char )(void )__stack_chk_guard)[3] = 255;
}
}

trust = !issetugid();		trust = !issetugid();

md_abi_variant_hook(aux_info);		md_abi_variant_hook(aux_info);

fd = -1;		fd = -1;
if (aux_info[AT_EXECFD] != NULL) {		if (aux_info[AT_EXECFD] != NULL) {
fd = aux_info[AT_EXECFD]->a_un.a_val;		fd = aux_info[AT_EXECFD]->a_un.a_val;
} else {		} else {
▲ Show 20 Lines • Show All 5,099 Lines • ▼ Show 20 Lines
int _thread_autoinit_dummy_decl = 1;		int _thread_autoinit_dummy_decl = 1;

/*		/*
* No unresolved symbols for rtld.		* No unresolved symbols for rtld.
*/		*/
void		void
__pthread_cxa_finalize(struct dl_phdr_info *a)		__pthread_cxa_finalize(struct dl_phdr_info *a)
{		{
}

void
__stack_chk_fail(void)
{

_rtld_error("stack overflow detected; terminated");
rtld_die();
}
__weak_reference(__stack_chk_fail, __stack_chk_fail_local);

void
__chk_fail(void)
{

_rtld_error("buffer overflow detected; terminated");
rtld_die();
}		}

const char *		const char *
rtld_strerror(int errnum)		rtld_strerror(int errnum)
{		{

if (errnum < 0 \|\| errnum >= sys_nerr)		if (errnum < 0 \|\| errnum >= sys_nerr)
return ("Unknown error");		return ("Unknown error");
return (sys_errlist[errnum]);		return (sys_errlist[errnum]);
}		}