kern_exec.c (ed6aff7387a072271291a3c7d9930312d44a5eaa) kern_exec.c (d323ddf3171ff6652c94cb9f79105f48f5ea8819)
1/*
2 * Copyright (c) 1993, David Greenman
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright

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101 struct proc *p;
102 register struct execve_args *uap;
103{
104 struct nameidata nd, *ndp;
105 register_t *stack_base;
106 int error, len, i;
107 struct image_params image_params, *imgp;
108 struct vattr attr;
1/*
2 * Copyright (c) 1993, David Greenman
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright

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101 struct proc *p;
102 register struct execve_args *uap;
103{
104 struct nameidata nd, *ndp;
105 register_t *stack_base;
106 int error, len, i;
107 struct image_params image_params, *imgp;
108 struct vattr attr;
109 int (*img_first) __P((struct image_params *));
109
110 imgp = &image_params;
111
112 /*
113 * Initialize part of the common data
114 */
115 imgp->proc = p;
116 imgp->uap = uap;

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169 }
170
171 error = exec_map_first_page(imgp);
172 VOP_UNLOCK(imgp->vp, 0, p);
173 if (error)
174 goto exec_fail_dealloc;
175
176 /*
110
111 imgp = &image_params;
112
113 /*
114 * Initialize part of the common data
115 */
116 imgp->proc = p;
117 imgp->uap = uap;

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170 }
171
172 error = exec_map_first_page(imgp);
173 VOP_UNLOCK(imgp->vp, 0, p);
174 if (error)
175 goto exec_fail_dealloc;
176
177 /*
177 * Loop through list of image activators, calling each one.
178 * If there is no match, the activator returns -1. If there
179 * is a match, but there was an error during the activation,
180 * the error is returned. Otherwise 0 means success. If the
181 * image is interpreted, loop back up and try activating
182 * the interpreter.
178 * If the current process has a special image activator it
179 * wants to try first, call it. For example, emulating shell
180 * scripts differently.
183 */
181 */
184 for (i = 0; execsw[i]; ++i) {
185 if (execsw[i]->ex_imgact)
186 error = (*execsw[i]->ex_imgact)(imgp);
187 else
182 error = -1;
183 if ((img_first = imgp->proc->p_sysent->sv_imgact_try) != NULL)
184 error = img_first(imgp);
185
186 /*
187 * Loop through the list of image activators, calling each one.
188 * An activator returns -1 if there is no match, 0 on success,
189 * and an error otherwise.
190 */
191 for (i = 0; error == -1 && execsw[i]; ++i) {
192 if (execsw[i]->ex_imgact == NULL ||
193 execsw[i]->ex_imgact == img_first) {
188 continue;
194 continue;
189 if (error == -1)
190 continue;
191 if (error)
192 goto exec_fail_dealloc;
193 if (imgp->interpreted) {
194 exec_unmap_first_page(imgp);
195 /* free name buffer and old vnode */
196 NDFREE(ndp, NDF_ONLY_PNBUF);
197 vrele(ndp->ni_vp);
198 /* set new name to that of the interpreter */
199 NDINIT(ndp, LOOKUP, LOCKLEAF | FOLLOW | SAVENAME,
200 UIO_SYSSPACE, imgp->interpreter_name, p);
201 goto interpret;
202 }
195 }
203 break;
196 error = (*execsw[i]->ex_imgact)(imgp);
204 }
197 }
205 /* If we made it through all the activators and none matched, exit. */
206 if (error == -1) {
207 error = ENOEXEC;
198
199 if (error) {
200 if (error == -1)
201 error = ENOEXEC;
208 goto exec_fail_dealloc;
209 }
210
211 /*
202 goto exec_fail_dealloc;
203 }
204
205 /*
206 * Special interpreter operation, cleanup and loop up to try to
207 * activate the interpreter.
208 */
209 if (imgp->interpreted) {
210 exec_unmap_first_page(imgp);
211 /* free name buffer and old vnode */
212 NDFREE(ndp, NDF_ONLY_PNBUF);
213 vrele(ndp->ni_vp);
214 /* set new name to that of the interpreter */
215 NDINIT(ndp, LOOKUP, LOCKLEAF | FOLLOW | SAVENAME,
216 UIO_SYSSPACE, imgp->interpreter_name, p);
217 goto interpret;
218 }
219
220 /*
212 * Copy out strings (args and env) and initialize stack base
213 */
214 stack_base = exec_copyout_strings(imgp);
215 p->p_vmspace->vm_minsaddr = (char *)stack_base;
216
217 /*
218 * If custom stack fixup routine present for this process
219 * let it do the stack setup.

--- 577 unchanged lines hidden --- 		221 * Copy out strings (args and env) and initialize stack base
222 */
223 stack_base = exec_copyout_strings(imgp);
224 p->p_vmspace->vm_minsaddr = (char *)stack_base;
225
226 /*
227 * If custom stack fixup routine present for this process
228 * let it do the stack setup.

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