From 071ea11e85eb9d529cc5eb3d35f6247466a21b99 Mon Sep 17 00:00:00 2001 From: Stan Shebs Date: Fri, 16 Apr 1999 01:34:07 +0000 Subject: Initial creation of sourceware repository --- sim/common/sim-break.c | 278 ------------------------------------------------- 1 file changed, 278 deletions(-) delete mode 100644 sim/common/sim-break.c (limited to 'sim/common/sim-break.c') diff --git a/sim/common/sim-break.c b/sim/common/sim-break.c deleted file mode 100644 index 3b89560..0000000 --- a/sim/common/sim-break.c +++ /dev/null @@ -1,278 +0,0 @@ -/* 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 - -#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; -} -- cgit v1.1