Differential D20799 Diff 66014 head/libexec/rtld-elf/rtld.c

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head/libexec/rtld-elf/rtld.c

Show First 20 Lines • Show All 376 Lines • ▼ Show 20 Lines	_rtld(Elf_Addr sp, func_ptr_type exit_proc, Obj_Entry **objp)
RtldLockState lockstate;		RtldLockState lockstate;
struct stat st;		struct stat st;
Elf_Addr *argcp;		Elf_Addr *argcp;
char argv, env, *envp, kexecpath, *library_path_rpath;		char argv, env, *envp, kexecpath, *library_path_rpath;
const char *argv0;		const char *argv0;
caddr_t imgentry;		caddr_t imgentry;
char buf[MAXPATHLEN];		char buf[MAXPATHLEN];
int argc, fd, i, phnum, rtld_argc;		int argc, fd, i, phnum, rtld_argc;
		#ifdef __powerpc__
		int old_auxv_format = 1;
		#endif
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 9 Lines	;
aux = (Elf_Auxinfo *) sp;		aux = (Elf_Auxinfo *) sp;

/* Digest the auxiliary vector. */		/* Digest the auxiliary vector. */
for (i = 0; i < AT_COUNT; i++)		for (i = 0; i < AT_COUNT; i++)
aux_info[i] = NULL;		aux_info[i] = NULL;
for (auxp = aux; auxp->a_type != AT_NULL; auxp++) {		for (auxp = aux; auxp->a_type != AT_NULL; auxp++) {
if (auxp->a_type < AT_COUNT)		if (auxp->a_type < AT_COUNT)
aux_info[auxp->a_type] = auxp;		aux_info[auxp->a_type] = auxp;
		#ifdef __powerpc__
		if (auxp->a_type == 23) /* AT_STACKPROT */
		old_auxv_format = 0;
		#endif
}		}

		#ifdef __powerpc__
		if (old_auxv_format) {
		/* Remap from old-style auxv numbers. */
		aux_info[23] = aux_info[21]; /* AT_STACKPROT */
		aux_info[21] = aux_info[19]; /* AT_PAGESIZESLEN */
		aux_info[19] = aux_info[17]; /* AT_NCPUS */
		aux_info[17] = aux_info[15]; /* AT_CANARYLEN */
		aux_info[15] = aux_info[13]; /* AT_EXECPATH */
		aux_info[13] = NULL; /* AT_GID */

		aux_info[20] = aux_info[18]; /* AT_PAGESIZES */
		aux_info[18] = aux_info[16]; /* AT_OSRELDATE */
		aux_info[16] = aux_info[14]; /* AT_CANARY */
		aux_info[14] = NULL; /* AT_EGID */
		}
		#endif

/* Initialize and relocate ourselves. */		/* Initialize and relocate ourselves. */
assert(aux_info[AT_BASE] != NULL);		assert(aux_info[AT_BASE] != NULL);
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;
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