+++ /dev/null
-/* Simulator breakpoint support.
- Copyright (C) 1997 Free Software Foundation, Inc.
- Contributed by Cygnus Support.
-
-This file is part of GDB, the GNU debugger.
-
-This program is free software; you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation; either version 2, or (at your option)
-any later version.
-
-This program is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-GNU General Public License for more details.
-
-You should have received a copy of the GNU General Public License along
-with this program; if not, write to the Free Software Foundation, Inc.,
-59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
-
-#include <stdio.h>
-
-#include "sim-main.h"
-#include "sim-assert.h"
-#include "sim-break.h"
-
-#ifndef SIM_BREAKPOINT
-#define SIM_BREAKPOINT {0x00}
-#define SIM_BREAKPOINT_SIZE (1)
-#endif
-
-struct
-sim_breakpoint
-{
- struct sim_breakpoint *next;
- SIM_ADDR addr; /* Address of this breakpoint */
- int flags;
- unsigned char loc_contents[SIM_BREAKPOINT_SIZE]; /* Contents of addr while
- BP is enabled */
-};
-
-#define SIM_BREAK_INSERTED 0x1 /* Breakpoint has been inserted */
-#define SIM_BREAK_DISABLED 0x2 /* Breakpoint is disabled */
-
-static unsigned char sim_breakpoint [] = SIM_BREAKPOINT;
-
-static void insert_breakpoint PARAMS ((SIM_DESC sd,
- struct sim_breakpoint *bp));
-static void remove_breakpoint PARAMS ((SIM_DESC sd,
- struct sim_breakpoint *bp));
-static SIM_RC resume_handler PARAMS ((SIM_DESC sd));
-static SIM_RC suspend_handler PARAMS ((SIM_DESC sd));
-
-
-/* Do the actual work of inserting a breakpoint into the instruction
- stream. */
-
-static void
-insert_breakpoint (sd, bp)
- SIM_DESC sd;
- struct sim_breakpoint *bp;
-{
- if (bp->flags & (SIM_BREAK_INSERTED | SIM_BREAK_DISABLED))
- return;
-
- sim_core_read_buffer (sd, NULL, exec_map, bp->loc_contents,
- bp->addr, SIM_BREAKPOINT_SIZE);
- sim_core_write_buffer (sd, NULL, exec_map, sim_breakpoint,
- bp->addr, SIM_BREAKPOINT_SIZE);
- bp->flags |= SIM_BREAK_INSERTED;
-}
-
-/* Do the actual work of removing a breakpoint. */
-
-static void
-remove_breakpoint (sd, bp)
- SIM_DESC sd;
- struct sim_breakpoint *bp;
-{
- if (!(bp->flags & SIM_BREAK_INSERTED))
- return;
-
- sim_core_write_buffer (sd, NULL, exec_map, bp->loc_contents,
- bp->addr, SIM_BREAKPOINT_SIZE);
- bp->flags &= ~SIM_BREAK_INSERTED;
-}
-
-/* Come here when a breakpoint insn is hit. If it's really a breakpoint, we
- halt things, and never return. If it's a false hit, we return to let the
- caller handle things. */
-
-void
-sim_handle_breakpoint (sd, cpu, cia)
- SIM_DESC sd;
- sim_cpu *cpu;
- sim_cia cia;
-{
- struct sim_breakpoint *bp;
-
- for (bp = STATE_BREAKPOINTS (sd); bp; bp = bp->next)
- if (bp->addr == CIA_ADDR (cia))
- break;
-
- if (!bp || !(bp->flags & SIM_BREAK_INSERTED))
- return;
-
- sim_engine_halt (sd, STATE_CPU (sd, 0), NULL, cia, sim_stopped, SIM_SIGTRAP);
-}
-
-/* Handler functions for simulator resume and suspend events. */
-
-static SIM_RC
-resume_handler (sd)
- SIM_DESC sd;
-{
- struct sim_breakpoint *bp;
-
- for (bp = STATE_BREAKPOINTS (sd); bp; bp = bp->next)
- insert_breakpoint (sd, bp);
-
- return SIM_RC_OK;
-}
-
-static SIM_RC
-suspend_handler (sd)
- SIM_DESC sd;
-{
- struct sim_breakpoint *bp;
-
- for (bp = STATE_BREAKPOINTS (sd); bp; bp = bp->next)
- remove_breakpoint (sd, bp);
-
- return SIM_RC_OK;
-}
-
-/* Called from simulator module initialization. */
-
-SIM_RC
-sim_break_install (sd)
- SIM_DESC sd;
-{
- sim_module_add_resume_fn (sd, resume_handler);
- sim_module_add_suspend_fn (sd, suspend_handler);
-
- return SIM_RC_OK;
-}
-
-/* Install a breakpoint. This is a user-function. The breakpoint isn't
- actually installed here. We just record it. Resume_handler does the
- actual work.
-*/
-
-SIM_RC
-sim_set_breakpoint (sd, addr)
- SIM_DESC sd;
- SIM_ADDR addr;
-{
- struct sim_breakpoint *bp;
-
- for (bp = STATE_BREAKPOINTS (sd); bp; bp = bp->next)
- if (bp->addr == addr)
- return SIM_RC_DUPLICATE_BREAKPOINT; /* Already there */
- else
- break; /* FIXME: why not scan all bp's? */
-
- bp = ZALLOC (struct sim_breakpoint);
-
- bp->addr = addr;
- bp->next = STATE_BREAKPOINTS (sd);
- bp->flags = 0;
- STATE_BREAKPOINTS (sd) = bp;
-
- return SIM_RC_OK;
-}
-
-/* Delete a breakpoint. All knowlege of the breakpoint is removed from the
- simulator.
-*/
-
-SIM_RC
-sim_clear_breakpoint (sd, addr)
- SIM_DESC sd;
- SIM_ADDR addr;
-{
- struct sim_breakpoint *bp, *bpprev;
-
- for (bp = STATE_BREAKPOINTS (sd), bpprev = NULL;
- bp;
- bpprev = bp, bp = bp->next)
- if (bp->addr == addr)
- break;
-
- if (!bp)
- return SIM_RC_UNKNOWN_BREAKPOINT;
-
- remove_breakpoint (sd, bp);
-
- if (bpprev)
- bpprev->next = bp->next;
- else
- STATE_BREAKPOINTS (sd) = NULL;
-
- zfree (bp);
-
- return SIM_RC_OK;
-}
-
-SIM_RC
-sim_clear_all_breakpoints (sd)
- SIM_DESC sd;
-{
- while (STATE_BREAKPOINTS (sd))
- sim_clear_breakpoint (sd, STATE_BREAKPOINTS (sd)->addr);
-
- return SIM_RC_OK;
-}
-
-SIM_RC
-sim_enable_breakpoint (sd, addr)
- SIM_DESC sd;
- SIM_ADDR addr;
-{
- struct sim_breakpoint *bp;
-
- for (bp = STATE_BREAKPOINTS (sd); bp; bp = bp->next)
- if (bp->addr == addr)
- break;
-
- if (!bp)
- return SIM_RC_UNKNOWN_BREAKPOINT;
-
- bp->flags &= ~SIM_BREAK_DISABLED;
-
- return SIM_RC_OK;
-}
-
-SIM_RC
-sim_disable_breakpoint (sd, addr)
- SIM_DESC sd;
- SIM_ADDR addr;
-{
- struct sim_breakpoint *bp;
-
- for (bp = STATE_BREAKPOINTS (sd); bp; bp = bp->next)
- if (bp->addr == addr)
- break;
-
- if (!bp)
- return SIM_RC_UNKNOWN_BREAKPOINT;
-
- bp->flags |= SIM_BREAK_DISABLED;
-
- return SIM_RC_OK;
-}
-
-SIM_RC
-sim_enable_all_breakpoints (sd)
- SIM_DESC sd;
-{
- struct sim_breakpoint *bp;
-
- for (bp = STATE_BREAKPOINTS (sd); bp; bp = bp->next)
- bp->flags &= ~SIM_BREAK_DISABLED;
-
- return SIM_RC_OK;
-}
-
-SIM_RC
-sim_disable_all_breakpoints (sd)
- SIM_DESC sd;
-{
- struct sim_breakpoint *bp;
-
- for (bp = STATE_BREAKPOINTS (sd); bp; bp = bp->next)
- bp->flags |= SIM_BREAK_DISABLED;
-
- return SIM_RC_OK;
-}
+++ /dev/null
-/* Simulator breakpoint support.
- Copyright (C) 1997 Free Software Foundation, Inc.
- Contributed by Cygnus Support.
-
-This file is part of GDB, the GNU debugger.
-
-This program is free software; you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation; either version 2, or (at your option)
-any later version.
-
-This program is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-GNU General Public License for more details.
-
-You should have received a copy of the GNU General Public License along
-with this program; if not, write to the Free Software Foundation, Inc.,
-59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
-
-
-#ifndef SIM_BREAK_H
-#define SIM_BREAK_H
-
-/* Call this to install the resume and suspend handlers for the breakpoint
- module. */
-
-MODULE_INSTALL_FN sim_break_install;
-
-/* Call this inside the simulator when we execute the potential
- breakpoint insn. If the breakpoint system knows about it, the
- breakpoint is handled, and this routine never returns. If this
- isn't really a breakpoint, then it returns to allow the caller to
- handle things. */
-
-void sim_handle_breakpoint PARAMS ((SIM_DESC sd, sim_cpu *cpu, sim_cia cia));
-
-#endif /* SIM_BREAK_H */
projects / binutils-gdb.git / commitdiff