2 * Copyright (c) 1992, 1993
3 * The Regents of the University of California. All rights reserved.
5 * This software was developed by the Computer Systems Engineering group
6 * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
7 * contributed to Berkeley.
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19 * This product includes software developed by the University of
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37 * @(#)md-sparc.c 8.1 (Berkeley) 6/6/93
39 * $DragonFly: src/usr.bin/gcore/md-sparc.c,v 1.5 2005/04/10 20:55:38 drhodus Exp $
42 #include <sys/param.h>
47 #include <sys/sysctl.h>
48 #include <machine/vmparam.h>
58 #define offsetof(s, f) ((int)&((s *)0)->f)
62 shift_page(int fd, off_t off, int ssize)
66 (void)lseek(fd, (off_t)-NBPG, SEEK_END);
67 for (; ssize > 0; ssize -= NBPG) {
68 (void)read(fd, buffer, NBPG);
69 (void)write(fd, buffer, NBPG);
70 (void)lseek(fd, (off_t)-2 * NBPG, SEEK_CUR);
75 * Fix up the core image for the sparc. We need to flush any register
76 * windows that are cached in the pcb out to the user stack.
77 * Also, we need to get the trap frame and possible floating point state
78 * from the top of the kernel stack and store it in the pcb.
81 md_core(kvm_t *kd, int fd, struct kinfo_proc *ki)
84 int nsaved, cc, ssize;
91 * Before anything else read the trapframe. Synchronizing here
92 * is impossible if the process is running.
94 cc = kvm_read(kd, (u_long)ki->kp_proc.p_md.md_tf,
96 (void *)&tf, sizeof(tf));
98 errx(1, "kvm_read: %s (reading kernel trapframe)",
100 if (cc != sizeof(tf))
101 errx(1, "cannot read kernel trapframe");
104 * Write out the real trap frame.
106 off = offsetof(struct user, u_md);
107 off += offsetof(struct md_coredump, md_tf);
108 if (lseek(fd, off, SEEK_SET) == -1)
110 (void)write(fd, &tf, sizeof(tf));
112 if (ki->kp_proc.p_md.md_fpstate != 0) {
114 * If floating point state is present, write it out too.
115 * It comes right after the trapframe so we don't need to seek.
118 cc = kvm_read(kd, (u_long)ki->kp_proc.p_md.md_fpstate,
119 (void *)&fs, sizeof(fs));
121 errx(1, "kvm_read: %s (fpu state)", kvm_geterr(kd));
122 if (cc != sizeof(fs))
123 errx(1, "cannot read fpu state");
124 (void)write(fd, (char *)&fs, sizeof(fs));
129 if (lseek(fd, (off_t)offsetof(struct user, u_pcb), SEEK_SET) == -1)
131 cc = read(fd, (char *)&pcb, sizeof(pcb));
132 if (cc != sizeof(pcb)) {
135 errx(1, "couldn't read pcb from core file");
139 * Write any unsaved windows to the appropriate stack locations.
141 nsaved = pcb.pcb_nsaved;
146 off = ctob(UPAGES + ki->kp_eproc.e_vm.vm_dsize);
147 ssize = ctob(ki->kp_eproc.e_vm.vm_ssize);
149 for (; --nsaved >= 0; ++rw) {
151 * Copy register window into appropriate stack location.
153 s = ssize - (USRSTACK - sp);
156 errx(1, "cannot copy pcb windows to stack");
158 * It's possible to be missing the bottomost
159 * page because a stack page hasn't been allocated
160 * for the register save area. Shift over
161 * the stack segment by a page, and update
162 * the u-area to reflect the new stack size. YECH!
164 shift_page(fd, off, ssize);
167 ++ki->kp_eproc.e_vm.vm_ssize;
169 (off_t)offsetof(struct user, u_kproc.kp_eproc.e_vm),
172 &ki->kp_eproc.e_vm, sizeof(ki->kp_eproc.e_vm));
174 if (lseek(fd, off + s, SEEK_SET) == -1)
175 errx(1, "cannot copy pcb windows to stack");
177 (void)write(fd, rw, sizeof(*rw));