diff options
Diffstat (limited to 'ddb/db_run.c')
| -rw-r--r-- | ddb/db_run.c | 26 |
1 files changed, 13 insertions, 13 deletions
diff --git a/ddb/db_run.c b/ddb/db_run.c index 47c39c2..c6feb24 100644 --- a/ddb/db_run.c +++ b/ddb/db_run.c @@ -1,25 +1,25 @@ -/* +/* * Mach Operating System * Copyright (c) 1993-1990 Carnegie Mellon University * All Rights Reserved. - * + * * Permission to use, copy, modify and distribute this software and its * documentation is hereby granted, provided that both the copyright * notice and this permission notice appear in all copies of the * software, derivative works or modified versions, and any portions * thereof, and that both notices appear in supporting documentation. - * + * * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. - * + * * Carnegie Mellon requests users of this software to return to - * + * * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU * School of Computer Science * Carnegie Mellon University * Pittsburgh PA 15213-3890 - * + * * any improvements or extensions that they make and grant Carnegie Mellon * the rights to redistribute these changes. */ @@ -240,7 +240,7 @@ db_single_step(regs, task) * db_getreg_val(); return the value of a user register, * as indicated in the hardware instruction * encoding, e.g. 8 for r8 - * + * * next_instr_address(pc,bd,task) returns the address of the first * instruction following the one at "pc", * which is either in the taken path of @@ -252,7 +252,7 @@ db_single_step(regs, task) * If one of these addresses does not already have a breakpoint, * we allocate a breakpoint and save it here. * These breakpoints are deleted on return. - */ + */ db_breakpoint_t db_not_taken_bkpt = 0; db_breakpoint_t db_taken_bkpt = 0; @@ -294,18 +294,18 @@ db_set_task_single_step(regs, task) db_taken_bkpt = 0; pc = next_instr_address(pc,1,task); } - + /* check if this control flow instruction is an unconditional transfer */ unconditional = inst_unconditional_flow_transfer(inst); pc = next_instr_address(pc,0,task); - /* + /* We only set the sequential breakpoint if previous instruction was not an unconditional change of flow of control. If the previous instruction is an unconditional change of flow of control, setting a breakpoint in the next sequential location may set a breakpoint in data or in another routine, - which could screw up either the program or the debugger. - (Consider, for instance, that the next sequential instruction is the + which could screw up either the program or the debugger. + (Consider, for instance, that the next sequential instruction is the start of a routine needed by the debugger.) */ if (!unconditional && db_find_breakpoint_here(task, pc) == 0) { @@ -438,4 +438,4 @@ db_in_single_step() return(db_run_mode != STEP_NONE && db_run_mode != STEP_CONTINUE); } -#endif MACH_KDB +#endif /* MACH_KDB */ |