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e826ef1ec4
DDB so that all the fields line up. - Print out the tid of the per-CPU idlethread instead of the pid since the idle process is now shared across all idle threads. MFC after: 1 month
149 lines
3.2 KiB
C
149 lines
3.2 KiB
C
/*-
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* Mach Operating System
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* Copyright (c) 1991,1990 Carnegie Mellon University
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* All Rights Reserved.
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*
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* Permission to use, copy, modify and distribute this software and its
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* documentation is hereby granted, provided that both the copyright
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* notice and this permission notice appear in all copies of the
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* software, derivative works or modified versions, and any portions
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* thereof, and that both notices appear in supporting documentation.
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*
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* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS
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* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
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* ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
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*
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* Carnegie Mellon requests users of this software to return to
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*
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* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
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* School of Computer Science
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* Carnegie Mellon University
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* Pittsburgh PA 15213-3890
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*
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* any improvements or extensions that they make and grant Carnegie the
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* rights to redistribute these changes.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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/*
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* Interface to new debugger.
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*/
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/kdb.h>
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#include <sys/cons.h>
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#include <sys/pcpu.h>
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#include <sys/proc.h>
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#include <machine/cpu.h>
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#include <vm/vm.h>
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#include <vm/pmap.h>
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#include <ddb/ddb.h>
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/*
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* Read bytes from kernel address space for debugger.
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*/
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int
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db_read_bytes(vm_offset_t addr, size_t size, char *data)
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{
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jmp_buf jb;
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void *prev_jb;
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char *src;
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int ret;
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prev_jb = kdb_jmpbuf(jb);
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ret = setjmp(jb);
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if (ret == 0) {
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src = (char *)addr;
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while (size-- > 0)
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*data++ = *src++;
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}
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(void)kdb_jmpbuf(prev_jb);
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return (ret);
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}
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/*
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* Write bytes to kernel address space for debugger.
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*/
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int
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db_write_bytes(vm_offset_t addr, size_t size, char *data)
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{
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jmp_buf jb;
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void *prev_jb;
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char *dst;
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pt_entry_t *ptep0 = NULL;
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pt_entry_t oldmap0 = 0;
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vm_offset_t addr1;
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pt_entry_t *ptep1 = NULL;
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pt_entry_t oldmap1 = 0;
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int ret;
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prev_jb = kdb_jmpbuf(jb);
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ret = setjmp(jb);
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if (ret == 0) {
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if (addr > trunc_page((vm_offset_t)btext) - size &&
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addr < round_page((vm_offset_t)etext)) {
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ptep0 = vtopte(addr);
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oldmap0 = *ptep0;
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*ptep0 |= PG_RW;
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/*
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* Map another page if the data crosses a page
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* boundary.
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*/
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if ((*ptep0 & PG_PS) == 0) {
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addr1 = trunc_page(addr + size - 1);
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if (trunc_page(addr) != addr1) {
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ptep1 = vtopte(addr1);
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oldmap1 = *ptep1;
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*ptep1 |= PG_RW;
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}
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} else {
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addr1 = trunc_2mpage(addr + size - 1);
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if (trunc_2mpage(addr) != addr1) {
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ptep1 = vtopte(addr1);
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oldmap1 = *ptep1;
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*ptep1 |= PG_RW;
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}
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}
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invltlb();
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}
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dst = (char *)addr;
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while (size-- > 0)
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*dst++ = *data++;
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}
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(void)kdb_jmpbuf(prev_jb);
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if (ptep0) {
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*ptep0 = oldmap0;
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if (ptep1)
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*ptep1 = oldmap1;
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invltlb();
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}
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return (ret);
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}
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void
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db_show_mdpcpu(struct pcpu *pc)
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{
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db_printf("curpmap = %p\n", pc->pc_curpmap);
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db_printf("tssp = %p\n", pc->pc_tssp);
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db_printf("commontssp = %p\n", pc->pc_commontssp);
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db_printf("rsp0 = 0x%lx\n", pc->pc_rsp0);
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db_printf("gs32p = %p\n", pc->pc_gs32p);
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db_printf("ldt = %p\n", pc->pc_ldt);
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db_printf("tss = %p\n", pc->pc_tss);
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}
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