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[/] [openrisc/] [trunk/] [rtos/] [ecos-2.0/] [packages/] [cygmon/] [v2_0/] [misc/] [bplist-dynamic.c] - Rev 27
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//========================================================================== // // bplist-dynamic.c // // Breakpoint list using dynamic memory. // //========================================================================== //####ECOSGPLCOPYRIGHTBEGIN#### // ------------------------------------------- // This file is part of eCos, the Embedded Configurable Operating System. // Copyright (C) 1998, 1999, 2000, 2001, 2002 Red Hat, Inc. // // eCos 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. // // eCos 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 eCos; if not, write to the Free Software Foundation, Inc., // 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. // // As a special exception, if other files instantiate templates or use macros // or inline functions from this file, or you compile this file and link it // with other works to produce a work based on this file, this file does not // by itself cause the resulting work to be covered by the GNU General Public // License. However the source code for this file must still be made available // in accordance with section (3) of the GNU General Public License. // // This exception does not invalidate any other reasons why a work based on // this file might be covered by the GNU General Public License. // // Alternative licenses for eCos may be arranged by contacting Red Hat, Inc. // at http://sources.redhat.com/ecos/ecos-license/ // ------------------------------------------- //####ECOSGPLCOPYRIGHTEND#### //========================================================================== //#####DESCRIPTIONBEGIN#### // // Author(s): // Contributors: gthomas // Date: 1999-10-20 // Purpose: Breakpoint list using dynamic memory. // Description: // // //####DESCRIPTIONEND#### // //========================================================================= #include "board.h" #ifndef USE_ECOS_HAL_BREAKPOINTS #include <stdlib.h> #ifndef NO_MALLOC #ifndef NO_MALLOC_H #include "malloc.h" #else void free (); char *malloc (); #endif #endif #ifdef __ECOS__ #include <cyg/hal/plf_stub.h> #endif /* __ECOS__ */ /* * A simple target breakpoint list using malloc. * To use this package, you must define TRAP_SIZE to be the size * in bytes of a trap instruction (max if there's more than one), * and export a char array called _breakinst that contains a * breakpoint trap. This package will copy trap instructions * from _breakinst into the breakpoint locations. */ static struct breakpoint_list { target_register_t addr; char old_contents [TRAP_SIZE]; struct breakpoint_list *next; char in_memory; } *breakpoint_list = NULL; #ifdef NO_MALLOC static struct breakpoint_list bp_list [MAX_BP_NUM]; static struct breakpoint_list *free_bp_list = NULL; static int curr_bp_num = 0; #endif #ifndef BREAKINST_DEFINED #define BREAKINST_DEFINED extern unsigned char _breakinst[]; #endif int __set_breakpoint (target_register_t addr) { struct breakpoint_list **addent = &breakpoint_list; struct breakpoint_list *l = breakpoint_list; struct breakpoint_list *newent; while (l != NULL && l->addr < addr) { addent = &l->next; l = l->next; } if (l != NULL && l->addr == addr) return 2; #ifdef NO_MALLOC if (free_bp_list != NULL) { newent = free_bp_list; free_bp_list = free_bp_list->next; } else { if (curr_bp_num < MAX_BP_NUM) { newent = &bp_list[curr_bp_num++]; } else { return 1; } } #else newent = (struct breakpoint_list *) malloc (sizeof (struct breakpoint_list)); #endif newent->addr = addr; newent->in_memory = 0; newent->next = l; *addent = newent; return 0; } int __remove_breakpoint (target_register_t addr) { struct breakpoint_list *l = breakpoint_list; struct breakpoint_list *prev = NULL; while (l != NULL && l->addr < addr) { prev = l; l = l->next; } if (l == NULL) return 1; if (l->in_memory) { __write_mem_safe (&l->old_contents[0], (void*)l->addr, sizeof (l->old_contents)); } if (prev == NULL) breakpoint_list = l->next; else prev->next = l->next; #ifdef NO_MALLOC l->next = free_bp_list; free_bp_list = l; #else free (l); #endif return 0; } #include <cyg/hal/generic-stub.h> #include <cyg/hal/hal_stub.h> void __cygmon_install_breakpoints (void) { struct breakpoint_list *l = breakpoint_list; while (l != NULL) { if (! l->in_memory) { int len = sizeof (l->old_contents); if (__read_mem_safe (&l->old_contents[0], (void*)l->addr, len) == len) { #ifdef WRITE_MEM_IS_MEMCPY if (__write_mem_safe (_breakinst, (void*)l->addr, len) == (void*)l->addr) #else if (__write_mem_safe (_breakinst, (void*)l->addr, len) == len) #endif { l->in_memory = 1; } } } l = l->next; } flush_i_cache (); } void __cygmon_clear_breakpoints (void) { struct breakpoint_list *l = breakpoint_list; while (l != NULL) { if (l->in_memory) { int len = sizeof (l->old_contents); #ifdef WRITE_MEM_IS_MEMCPY if (__write_mem_safe (_breakinst, (void*)l->addr, len) == (void*)l->addr) #else if (__write_mem_safe (&l->old_contents[0], (void*)l->addr, len) == len) #endif { l->in_memory = 0; } } l = l->next; } flush_i_cache (); } #endif // USE_ECOS_HAL_BREAKPOINTS
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