* Make-common.in: New files sim-break.c, sim-break.h.
* sim-base.h: Add point to breakpoint list to sim_state_base. * sim-break.c sim-break.h: New modules that implement intrinsic breakpoint support. * sim-module.c: Add breakpoint module.
This commit is contained in:
Stu Grossman
parent
f849a33ee3
commit
b9d580a4b0
5 changed files with 331 additions and 0 deletions
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@ -53,6 +53,8 @@ sim-base.h
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sim-basics.h
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sim-bits.c
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sim-bits.h
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sim-break.c
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sim-break.h
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sim-config.c
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sim-config.h
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sim-core.c
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@ -1,3 +1,11 @@
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Wed Sep 24 17:41:40 1997 Stu Grossman <grossman@babylon-5.cygnus.com>
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* Make-common.in: New files sim-break.c, sim-break.h.
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* sim-base.h: Add point to breakpoint list to sim_state_base.
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* sim-break.c sim-break.h: New modules that implement intrinsic
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breakpoint support.
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* sim-module.c: Add breakpoint module.
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Tue Sep 23 00:26:39 1997 Felix Lee <flee@yin.cygnus.com>
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* sim-events.c (SIM_EVENTS_POLL_RATE): poll more often than once
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@ -239,6 +239,7 @@ sim-events_h = $(srcdir)/../common/sim-events.h
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sim-fpu_h = $(srcdir)/../common/sim-fpu.h
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sim-io_h = $(srcdir)/../common/sim-io.h
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sim-options_h = $(srcdir)/../common/sim-options.h
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sim-break_h = $(srcdir)/../common/sim-break.h
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# FIXME: If this complicated way of building .o files from ../common is
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# necessary, the reason should be documented here.
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@ -353,6 +354,10 @@ sim-watch.o: $(srcdir)/../common/sim-watch.c $(sim_main_headers) \
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sim-load.o: $(srcdir)/../common/sim-load.c
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$(CC) -c $(srcdir)/../common/sim-load.c $(ALL_CFLAGS)
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sim-break.o: $(srcdir)/../common/sim-break.c $(sim_main_headers) \
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$(SIM_EXTRA_DEPS) $(sim_break_h)
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$(CC) -c $(srcdir)/../common/sim-break.c $(ALL_CFLAGS)
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nrun.o: $(srcdir)/../common/nrun.c config.h tconfig.h \
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$(srcroot)/include/callback.h $(sim_main_headers)
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$(CC) -c $(srcdir)/../common/nrun.c $(ALL_CFLAGS)
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278
sim/common/sim-break.c
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278
sim/common/sim-break.c
Normal file
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@ -0,0 +1,278 @@
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/* Simulator breakpoint support.
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Copyright (C) 1997 Free Software Foundation, Inc.
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Contributed by Cygnus Support.
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This file is part of GDB, the GNU debugger.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License along
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with this program; if not, write to the Free Software Foundation, Inc.,
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59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
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#include <stdio.h>
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#include <signal.h>
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#include "sim-main.h"
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#include "sim-assert.h"
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#include "sim-break.h"
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#ifndef SIM_BREAKPOINT
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#define SIM_BREAKPOINT {0x00}
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#define SIM_BREAKPOINT_SIZE (1)
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#endif
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struct
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sim_breakpoint
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{
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struct sim_breakpoint *next;
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SIM_ADDR addr; /* Address of this breakpoint */
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int flags;
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unsigned char loc_contents[SIM_BREAKPOINT_SIZE]; /* Contents of addr while
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BP is enabled */
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};
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#define SIM_BREAK_INSERTED 0x1 /* Breakpoint has been inserted */
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#define SIM_BREAK_DISABLED 0x2 /* Breakpoint is disabled */
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static unsigned char sim_breakpoint [] = SIM_BREAKPOINT;
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static void insert_breakpoint PARAMS ((SIM_DESC sd,
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struct sim_breakpoint *bp));
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static void remove_breakpoint PARAMS ((SIM_DESC sd,
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struct sim_breakpoint *bp));
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static SIM_RC resume_handler PARAMS ((SIM_DESC sd));
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static SIM_RC suspend_handler PARAMS ((SIM_DESC sd));
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/* Do the actual work of inserting a breakpoint into the instruction stream. */
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static void
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insert_breakpoint (sd, bp)
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SIM_DESC sd;
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struct sim_breakpoint *bp;
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{
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if (bp->flags & (SIM_BREAK_INSERTED | SIM_BREAK_DISABLED))
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return;
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sim_core_read_buffer (sd, NULL, sim_core_write_map, bp->loc_contents,
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bp->addr, SIM_BREAKPOINT_SIZE);
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sim_core_write_buffer (sd, NULL, sim_core_write_map, sim_breakpoint,
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bp->addr, SIM_BREAKPOINT_SIZE);
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bp->flags |= SIM_BREAK_INSERTED;
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}
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/* Do the actual work of removing a breakpoint. */
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static void
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remove_breakpoint (sd, bp)
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SIM_DESC sd;
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struct sim_breakpoint *bp;
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{
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if (!(bp->flags & SIM_BREAK_INSERTED))
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return;
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sim_core_write_buffer (sd, NULL, sim_core_write_map, bp->loc_contents,
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bp->addr, SIM_BREAKPOINT_SIZE);
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bp->flags &= SIM_BREAK_INSERTED;
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}
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/* Come here when a breakpoint insn is hit. If it's really a breakpoint, we
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halt things, and never return. If it's a false hit, we return to let the
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caller handle things. */
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void
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sim_handle_breakpoint (sd, cpu, cia)
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SIM_DESC sd;
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sim_cpu *cpu;
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sim_cia cia;
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{
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struct sim_breakpoint *bp;
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for (bp = STATE_BREAKPOINTS (sd); bp; bp = bp->next)
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if (bp->addr == cia)
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break;
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if (!bp || !(bp->flags & SIM_BREAK_INSERTED))
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return;
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sim_engine_halt (sd, STATE_CPU (sd, 0), NULL, cia, sim_stopped, SIGTRAP);
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}
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/* Handler functions for simulator resume and suspend events. */
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static SIM_RC
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resume_handler (sd)
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SIM_DESC sd;
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{
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struct sim_breakpoint *bp;
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for (bp = STATE_BREAKPOINTS (sd); bp; bp = bp->next)
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insert_breakpoint (sd, bp);
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return SIM_RC_OK;
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}
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static SIM_RC
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suspend_handler (sd)
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SIM_DESC sd;
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{
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struct sim_breakpoint *bp;
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for (bp = STATE_BREAKPOINTS (sd); bp; bp = bp->next)
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remove_breakpoint (sd, bp);
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return SIM_RC_OK;
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}
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/* Called from simulator module initialization. */
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SIM_RC
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sim_break_install (sd)
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SIM_DESC sd;
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{
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sim_module_add_resume_fn (sd, resume_handler);
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sim_module_add_suspend_fn (sd, suspend_handler);
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return SIM_RC_OK;
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}
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/* Install a breakpoint. This is a user-function. The breakpoint isn't
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actually installed here. We just record it. Resume_handler does the
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actual work.
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*/
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SIM_RC
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sim_set_breakpoint (sd, addr)
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SIM_DESC sd;
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SIM_ADDR addr;
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{
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struct sim_breakpoint *bp;
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for (bp = STATE_BREAKPOINTS (sd); bp; bp = bp->next)
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if (bp->addr == addr)
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return SIM_RC_DUPLICATE_BREAKPOINT; /* Already there */
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else
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break;
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bp = (struct sim_breakpoint *) xmalloc (sizeof (struct sim_breakpoint));
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bp->addr = addr;
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bp->next = STATE_BREAKPOINTS (sd);
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bp->flags = 0;
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STATE_BREAKPOINTS (sd) = bp;
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return SIM_RC_OK;
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}
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/* Delete a breakpoint. All knowlege of the breakpoint is removed from the
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simulator.
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*/
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SIM_RC
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sim_clear_breakpoint (sd, addr)
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SIM_DESC sd;
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SIM_ADDR addr;
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{
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struct sim_breakpoint *bp, *bpprev;
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for (bp = STATE_BREAKPOINTS (sd), bpprev = NULL;
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bp;
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bpprev = bp, bp = bp->next)
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if (bp->addr == addr)
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break;
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if (!bp)
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return SIM_RC_UNKNOWN_BREAKPOINT;
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remove_breakpoint (sd, bp);
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if (bpprev)
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bpprev->next = bp->next;
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else
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STATE_BREAKPOINTS (sd) = NULL;
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free (bp);
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return SIM_RC_OK;
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}
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SIM_RC
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sim_clear_all_breakpoints (sd)
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SIM_DESC sd;
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{
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while (STATE_BREAKPOINTS (sd))
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sim_clear_breakpoint (sd, STATE_BREAKPOINTS (sd)->addr);
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return SIM_RC_OK;
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}
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SIM_RC
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sim_enable_breakpoint (sd, addr)
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SIM_DESC sd;
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SIM_ADDR addr;
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{
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struct sim_breakpoint *bp;
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for (bp = STATE_BREAKPOINTS (sd); bp; bp = bp->next)
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if (bp->addr == addr)
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break;
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if (!bp)
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return SIM_RC_UNKNOWN_BREAKPOINT;
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bp->flags &= ~SIM_BREAK_DISABLED;
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return SIM_RC_OK;
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}
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SIM_RC
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sim_disable_breakpoint (sd, addr)
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SIM_DESC sd;
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SIM_ADDR addr;
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{
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struct sim_breakpoint *bp;
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for (bp = STATE_BREAKPOINTS (sd); bp; bp = bp->next)
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if (bp->addr == addr)
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break;
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if (!bp)
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return SIM_RC_UNKNOWN_BREAKPOINT;
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bp->flags |= SIM_BREAK_DISABLED;
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return SIM_RC_OK;
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}
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SIM_RC
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sim_enable_all_breakpoints (sd)
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SIM_DESC sd;
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{
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struct sim_breakpoint *bp;
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for (bp = STATE_BREAKPOINTS (sd); bp; bp = bp->next)
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bp->flags &= ~SIM_BREAK_DISABLED;
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return SIM_RC_OK;
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}
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SIM_RC
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sim_disable_all_breakpoints (sd)
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SIM_DESC sd;
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{
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struct sim_breakpoint *bp;
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for (bp = STATE_BREAKPOINTS (sd); bp; bp = bp->next)
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bp->flags |= SIM_BREAK_DISABLED;
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return SIM_RC_OK;
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}
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38
sim/common/sim-break.h
Normal file
38
sim/common/sim-break.h
Normal file
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@ -0,0 +1,38 @@
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/* Simulator breakpoint support.
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Copyright (C) 1997 Free Software Foundation, Inc.
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Contributed by Cygnus Support.
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This file is part of GDB, the GNU debugger.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License along
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with this program; if not, write to the Free Software Foundation, Inc.,
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59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
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#ifndef SIM_BREAK_H
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#define SIM_BREAK_H
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/* Call this to install the resume and suspend handlers for the breakpoint
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module. */
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MODULE_INSTALL_FN sim_break_install;
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/* Call this inside the simulator when we execute the potential
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breakpoint insn. If the breakpoint system knows about it, the
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breakpoint is handled, and this routine never returns. If this
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isn't really a breakpoint, then it returns to allow the caller to
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handle things. */
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void sim_handle_breakpoint PARAMS ((SIM_DESC sd, sim_cpu *cpu, sim_cia cia));
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#endif /* SIM_BREAK_H */
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