37224cd3fc
Most of the changes are a direct result of adding thread awareness. Typically, DDB_REGS is gone. All registers are taken from the trapframe and backtraces use the PCB based contexts. DDB_REGS was defined to be a trapframe on all platforms anyway. Thread awareness introduces the following new commands: thread X switch to thread X (where X is the TID), show threads list all threads. The backtrace code has been made more flexible so that one can create backtraces for any thread by giving the thread ID as an argument to trace. With this change, ia64 has support for breakpoints.
110 lines
2.4 KiB
C
110 lines
2.4 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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/*
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* Author: David B. Golub, Carnegie Mellon University
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* Date: 7/90
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/kdb.h>
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#include <ddb/ddb.h>
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#include <ddb/db_access.h>
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/*
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* Access unaligned data items on aligned (longword)
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* boundaries.
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*/
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static unsigned db_extend[] = { /* table for sign-extending */
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0,
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0xFFFFFF80U,
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0xFFFF8000U,
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0xFF800000U
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};
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db_expr_t
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db_get_value(addr, size, is_signed)
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db_addr_t addr;
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register int size;
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boolean_t is_signed;
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{
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char data[sizeof(u_int64_t)];
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register db_expr_t value;
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register int i;
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if (db_read_bytes(addr, size, data) != 0) {
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db_printf("*** error reading from address %llx ***\n",
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(long long)addr);
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kdb_reenter();
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}
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value = 0;
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#if BYTE_MSF
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for (i = 0; i < size; i++)
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#else /* BYTE_LSF */
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for (i = size - 1; i >= 0; i--)
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#endif
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{
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value = (value << 8) + (data[i] & 0xFF);
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}
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if (size < 4) {
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if (is_signed && (value & db_extend[size]) != 0)
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value |= db_extend[size];
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}
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return (value);
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}
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void
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db_put_value(addr, size, value)
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db_addr_t addr;
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register int size;
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register db_expr_t value;
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{
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char data[sizeof(int)];
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register int i;
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#if BYTE_MSF
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for (i = size - 1; i >= 0; i--)
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#else /* BYTE_LSF */
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for (i = 0; i < size; i++)
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#endif
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{
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data[i] = value & 0xFF;
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value >>= 8;
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}
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if (db_write_bytes(addr, size, data) != 0) {
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db_printf("*** error writing to address %llx ***\n",
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(long long)addr);
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kdb_reenter();
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}
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}
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