mirror of https://github.com/F-Stack/f-stack.git
123 lines
2.8 KiB
C
123 lines
2.8 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/pcpu.h>
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#include <sys/proc.h>
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#include <machine/psl.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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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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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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return (ret);
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}
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int
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db_segsize(struct trapframe *tfp)
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{
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struct proc_ldt *plp;
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struct segment_descriptor *sdp;
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int sel;
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if (tfp == NULL)
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return (32);
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if (tfp->tf_eflags & PSL_VM)
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return (16);
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sel = tfp->tf_cs & 0xffff;
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if (sel == GSEL(GCODE_SEL, SEL_KPL))
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return (32);
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/* Rare cases follow. User mode cases are currently unreachable. */
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if (ISLDT(sel)) {
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plp = curthread->td_proc->p_md.md_ldt;
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sdp = (plp != NULL) ? &plp->ldt_sd : &ldt[0].sd;
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} else {
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sdp = &gdt[PCPU_GET(cpuid) * NGDT].sd;
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}
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return (sdp[IDXSEL(sel)].sd_def32 == 0 ? 16 : 32);
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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("APIC ID = %d\n", pc->pc_apic_id);
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db_printf("currentldt = 0x%x\n", pc->pc_currentldt);
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db_printf("trampstk = 0x%x\n", pc->pc_trampstk);
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db_printf("kesp0 = 0x%x\n", pc->pc_kesp0);
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db_printf("common_tssp = 0x%x\n", (u_int)pc->pc_common_tssp);
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db_printf("tlb gen = %u\n", pc->pc_smp_tlb_done);
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}
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