2 * Mach Operating System
3 * Copyright (c) 1991,1990 Carnegie Mellon University
6 * Permission to use, copy, modify and distribute this software and its
7 * documentation is hereby granted, provided that both the copyright
8 * notice and this permission notice appear in all copies of the
9 * software, derivative works or modified versions, and any portions
10 * thereof, and that both notices appear in supporting documentation.
12 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS
13 * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
14 * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
16 * Carnegie Mellon requests users of this software to return to
18 * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
19 * School of Computer Science
20 * Carnegie Mellon University
21 * Pittsburgh PA 15213-3890
23 * any improvements or extensions that they make and grant Carnegie the
24 * rights to redistribute these changes.
27 #include <sys/cdefs.h>
28 __FBSDID("$FreeBSD$");
31 * Interface to new debugger.
34 #include <sys/param.h>
35 #include <sys/systm.h>
40 #include <machine/psl.h>
45 * Read bytes from kernel address space for debugger.
48 db_read_bytes(vm_offset_t addr, size_t size, char *data)
55 prev_jb = kdb_jmpbuf(jb);
62 (void)kdb_jmpbuf(prev_jb);
67 * Write bytes to kernel address space for debugger.
70 db_write_bytes(vm_offset_t addr, size_t size, char *data)
77 prev_jb = kdb_jmpbuf(jb);
84 (void)kdb_jmpbuf(prev_jb);
89 db_segsize(struct trapframe *tfp)
92 struct segment_descriptor *sdp;
97 if (tfp->tf_eflags & PSL_VM)
99 sel = tfp->tf_cs & 0xffff;
100 if (sel == GSEL(GCODE_SEL, SEL_KPL))
102 /* Rare cases follow. User mode cases are currently unreachable. */
104 plp = curthread->td_proc->p_md.md_ldt;
105 sdp = (plp != NULL) ? &plp->ldt_sd : &ldt[0].sd;
107 sdp = &gdt[PCPU_GET(cpuid) * NGDT].sd;
109 return (sdp[IDXSEL(sel)].sd_def32 == 0 ? 16 : 32);
113 db_show_mdpcpu(struct pcpu *pc)
116 db_printf("APIC ID = %d\n", pc->pc_apic_id);
117 db_printf("currentldt = 0x%x\n", pc->pc_currentldt);