bsd/kern/kern_exec.c

40  * All or some portions of this file are derived from material licensed
58  *    may be used to endorse or promote products derived from this software
73  *	from: @(#)kern_exec.c	8.1 (Berkeley) 6/10/93
181  * Mach things for which prototypes are unavailable from Mach headers
263  *		int				segment from which string comes
267  *		!0			Failure errno from copyinstr()
323  *		int				segment from which path comes
437 	 * from an interpreted file once, don't do it again.
529 	 * from the vnode and pass /dev/fd/%d instead of the actual
560  * need to select an image from it internally, and make that the image
562  * reloading the first page for the image with a first page from the
826 	/* Copy in arguments/environment from the old process */
844 	 * obtained indirectly from the image_params vfs_context_t, is the
1084 	 * we can race with the faulting code and proceed from here to
1163 	 * Pay for our earlier safety; deliver the delayed signals from
1288 	 * Before we start the transition from binary A to binary B, make
1602 			 * a path argument, which is normally copied in from
1604 			 * open from kernel space that passes an address space
1654 			 * If we didn't fall out from an error, we ended up
1658 			dup2a.from = origfd;
1683 			dup2a.from = psfa->psfaa_filedes;
1969 			 * Convert arguments descriptor from external 32 bit
1987 			 * because we already have it from px_args.
2073 	 * process which does not inherit memory from the parent process,
2220 		 * activator called from exec_activate_image().  POSIX
2251 		 * Forcibly disallow execution from data pages for the spawned process
2261 	 * P_DISABLE_ASLR was inherited from the parent process.
2355 			 * Always treat a CPU monitor activation coming from spawn as entitled. Requiring
2359 			 * XXX - Ignore the parameters that we get from userland. The spawnattr method of
2362 			 * respect the params passed in from userland.
2410 	 * because we come back from that call with signals blocked in the
2433 		/* reset the importance attribute from our previous life */
2436 		/* reset atm context from task */
2489 		 * Pay for our earlier safety; deliver the delayed signals from
2770 		/* reset atm context from task */
2800  * Description:	Copy a pointer in from user space to a user_addr_t in kernel
2834  * Description:	Copy a pointer out from a user_addr_t in kernel space to
2877  * Note:	The strings segment layout is backward, from the beginning
3113  * Copy arguments and environment from user space into work area; we may
3603  * should not technically be separate from the credential itself).
3881  *		load_result		Information from mach-o load commands
4127  *		to enable us to copy arguments in from user space.  This is
4519 	/* Decode dyld anchor structure from <mach-o/dyld_images.h> */