1 /*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License, Version 1.0 only
6 * (the "License"). You may not use this file except in compliance
7 * with the License.
8 *
9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10 * or http://www.opensolaris.org/os/licensing.
11 * See the License for the specific language governing permissions
12 * and limitations under the License.
13 *
14 * When distributing Covered Code, include this CDDL HEADER in each
15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16 * If applicable, add the following below this CDDL HEADER, with the
17 * fields enclosed by brackets "[]" replaced with your own identifying
18 * information: Portions Copyright [yyyy] [name of copyright owner]
19 *
20 * CDDL HEADER END
21 */
22 /*
23 * Copyright 2004 Sun Microsystems, Inc. All rights reserved.
24 * Use is subject to license terms.
25 */
26
27 #pragma ident "%Z%%M% %I% %E% SMI"
28
29 #include <sys/types.h>
30 #include <sys/param.h>
31 #include <sys/thread.h>
32 #include <sys/sysmacros.h>
33 #include <sys/signal.h>
34 #include <sys/cred.h>
35 #include <sys/user.h>
36 #include <sys/errno.h>
37 #include <sys/vnode.h>
38 #include <sys/mman.h>
39 #include <sys/kmem.h>
40 #include <sys/proc.h>
41 #include <sys/pathname.h>
42 #include <sys/cmn_err.h>
43 #include <sys/systm.h>
44 #include <sys/elf.h>
45 #include <sys/vmsystm.h>
46 #include <sys/debug.h>
47 #include <sys/old_procfs.h>
48 #include <sys/auxv.h>
49 #include <sys/exec.h>
50 #include <sys/prsystm.h>
51 #include <vm/as.h>
52 #include <vm/rm.h>
53 #include <sys/modctl.h>
54 #include <sys/systeminfo.h>
55 #include <sys/machelf.h>
56 #include <sys/zone.h>
57 #include "elf_impl.h"
58
59 extern void oprgetstatus(kthread_t *, prstatus_t *, zone_t *);
60 extern void oprgetpsinfo(proc_t *, prpsinfo_t *, kthread_t *);
61
62 void
setup_old_note_header(Phdr * v,proc_t * p)63 setup_old_note_header(Phdr *v, proc_t *p)
64 {
65 int nlwp = p->p_lwpcnt;
66 size_t size;
67
68 v[0].p_type = PT_NOTE;
69 v[0].p_flags = PF_R;
70 v[0].p_filesz = (sizeof (Note) * (3 + nlwp))
71 + roundup(sizeof (prpsinfo_t), sizeof (Word))
72 + roundup(strlen(platform) + 1, sizeof (Word))
73 + roundup(__KERN_NAUXV_IMPL * sizeof (aux_entry_t),
74 sizeof (Word))
75 + nlwp * roundup(sizeof (prstatus_t), sizeof (Word));
76 if (prhasfp())
77 v[0].p_filesz += nlwp * sizeof (Note)
78 + nlwp*roundup(sizeof (prfpregset_t), sizeof (Word));
79 if ((size = prhasx(p)? prgetprxregsize(p) : 0) != 0)
80 v[0].p_filesz += nlwp * sizeof (Note)
81 + nlwp * roundup(size, sizeof (Word));
82
83 #if defined(__sparc)
84 /*
85 * Figure out the number and sizes of register windows.
86 */
87 {
88 kthread_t *t = p->p_tlist;
89 do {
90 if ((size = prnwindows(ttolwp(t))) != 0) {
91 size = sizeof (gwindows_t) -
92 (SPARC_MAXREGWINDOW - size) *
93 sizeof (struct rwindow);
94 v[0].p_filesz += sizeof (Note) +
95 roundup(size, sizeof (Word));
96 }
97 } while ((t = t->t_forw) != p->p_tlist);
98 }
99 #endif /* __sparc */
100 }
101
102 int
write_old_elfnotes(proc_t * p,int sig,vnode_t * vp,offset_t offset,rlim64_t rlimit,cred_t * credp)103 write_old_elfnotes(proc_t *p, int sig, vnode_t *vp, offset_t offset,
104 rlim64_t rlimit, cred_t *credp)
105 {
106 union {
107 prpsinfo_t psinfo;
108 prstatus_t prstat;
109 prfpregset_t fpregs;
110 #if defined(__sparc)
111 gwindows_t gwindows;
112 #endif /* __sparc */
113 char xregs[1];
114 aux_entry_t auxv[__KERN_NAUXV_IMPL];
115 } *bigwad;
116 int xregsize = prhasx(p)? prgetprxregsize(p) : 0;
117 size_t bigsize = MAX(sizeof (*bigwad), (size_t)xregsize);
118 kthread_t *t;
119 klwp_t *lwp;
120 user_t *up;
121 int i;
122 int nlwp;
123 int error;
124
125 bigwad = kmem_alloc(bigsize, KM_SLEEP);
126
127 /*
128 * The order of the elfnote entries should be same here and in
129 * the gcore(1) command. Synchronization is needed between the
130 * kernel and libproc's Pfgcore() function where the meat of
131 * the gcore(1) command lives.
132 */
133
134 mutex_enter(&p->p_lock);
135 oprgetpsinfo(p, &bigwad->psinfo, NULL);
136 mutex_exit(&p->p_lock);
137 error = elfnote(vp, &offset, NT_PRPSINFO, sizeof (bigwad->psinfo),
138 (caddr_t)&bigwad->psinfo, rlimit, credp);
139 if (error)
140 goto done;
141
142 error = elfnote(vp, &offset, NT_PLATFORM, strlen(platform) + 1,
143 platform, rlimit, credp);
144 if (error)
145 goto done;
146
147 up = PTOU(p);
148 for (i = 0; i < __KERN_NAUXV_IMPL; i++) {
149 bigwad->auxv[i].a_type = up->u_auxv[i].a_type;
150 bigwad->auxv[i].a_un.a_val = up->u_auxv[i].a_un.a_val;
151 }
152 error = elfnote(vp, &offset, NT_AUXV, sizeof (bigwad->auxv),
153 (caddr_t)bigwad->auxv, rlimit, credp);
154 if (error)
155 goto done;
156
157 t = curthread;
158 nlwp = p->p_lwpcnt;
159 do {
160 ASSERT(nlwp != 0);
161 nlwp--;
162 lwp = ttolwp(t);
163
164 mutex_enter(&p->p_lock);
165 if (t == curthread) {
166 uchar_t oldsig;
167
168 /*
169 * Modify t_whystop and lwp_cursig so it appears that
170 * the current LWP is stopped after faulting on the
171 * signal that caused the core dump. As a result,
172 * oprgetstatus() will record that signal, the saved
173 * lwp_siginfo, and its signal handler in the core file
174 * status. We restore lwp_cursig in case a subsequent
175 * signal was received while dumping core.
176 */
177 oldsig = lwp->lwp_cursig;
178 lwp->lwp_cursig = (uchar_t)sig;
179 t->t_whystop = PR_FAULTED;
180
181 oprgetstatus(t, &bigwad->prstat, p->p_zone);
182 bigwad->prstat.pr_why = 0;
183
184 t->t_whystop = 0;
185 lwp->lwp_cursig = oldsig;
186
187 } else {
188 oprgetstatus(t, &bigwad->prstat, p->p_zone);
189 }
190 mutex_exit(&p->p_lock);
191 error = elfnote(vp, &offset, NT_PRSTATUS,
192 sizeof (bigwad->prstat), (caddr_t)&bigwad->prstat,
193 rlimit, credp);
194 if (error)
195 goto done;
196
197 if (prhasfp()) {
198 prgetprfpregs(lwp, &bigwad->fpregs);
199 error = elfnote(vp, &offset, NT_PRFPREG,
200 sizeof (bigwad->fpregs), (caddr_t)&bigwad->fpregs,
201 rlimit, credp);
202 if (error)
203 goto done;
204 }
205
206 #if defined(__sparc)
207 /*
208 * Unspilled SPARC register windows.
209 */
210 {
211 size_t size = prnwindows(lwp);
212
213 if (size != 0) {
214 size = sizeof (gwindows_t) -
215 (SPARC_MAXREGWINDOW - size) *
216 sizeof (struct rwindow);
217 prgetwindows(lwp, &bigwad->gwindows);
218 error = elfnote(vp, &offset, NT_GWINDOWS,
219 size, (caddr_t)&bigwad->gwindows,
220 rlimit, credp);
221 if (error)
222 goto done;
223 }
224 }
225 #endif /* __sparc */
226
227 if (xregsize) {
228 prgetprxregs(lwp, bigwad->xregs);
229 error = elfnote(vp, &offset, NT_PRXREG,
230 xregsize, bigwad->xregs, rlimit, credp);
231 if (error)
232 goto done;
233 }
234 } while ((t = t->t_forw) != curthread);
235 ASSERT(nlwp == 0);
236
237 done:
238 kmem_free(bigwad, bigsize);
239 return (error);
240 }
241