diff options
| author | Joel Brobecker <brobecker@gnat.com> | 2002-08-17 06:12:52 +0000 |
|---|---|---|
| committer | Joel Brobecker <brobecker@gnat.com> | 2002-08-17 06:12:52 +0000 |
| commit | 61f93994aae9c0cb2aaffd7572e8ca6c23b24557 (patch) | |
| tree | f7582d4848c0d55a08e1dd5211e75df7e21987e3 /gdb/infrun.c | |
| parent | f8e1e99433e74acc282efd04f9d05667b4f9f1bb (diff) | |
| download | gdb-61f93994aae9c0cb2aaffd7572e8ca6c23b24557.tar.gz | |
* alpha-osf1-tdep.c (alpha_osf1_init_abi): Unfortunately,
procfs appears to be broken when debugging on multi-processor
machines. So enable software single stepping in order to avoid
using the procfs interface to do next/step operations, using
internal breakpoints instead.
* infrun.c (handle_inferior_event): Readjust the stop_pc by
DECR_PC_AFTER_BREAK when hitting a single step breakpoint, to
make this pc address equal to the value it would have if the
system stepping capability was used. Also set a new flag used
to ensure that we don't readjust the PC one more time later.
* breakpoint.c (bpstat_stop_status): Do not adjust the PC
address by DECR_PC_AFTER_BREAK when software single step is
in use for this architecture, as this has already been taken
care of in handle_inferior_event().
Diffstat (limited to 'gdb/infrun.c')
| -rw-r--r-- | gdb/infrun.c | 23 |
1 files changed, 19 insertions, 4 deletions
diff --git a/gdb/infrun.c b/gdb/infrun.c index 8375b6937c1..98867cc9a46 100644 --- a/gdb/infrun.c +++ b/gdb/infrun.c @@ -1408,6 +1408,7 @@ handle_inferior_event (struct execution_control_state *ecs) { CORE_ADDR tmp; int stepped_after_stopped_by_watchpoint; + int sw_single_step_trap_p = 0; /* Cache the last pid/waitstatus. */ target_last_wait_ptid = ecs->ptid; @@ -1888,6 +1889,18 @@ handle_inferior_event (struct execution_control_state *ecs) } else if (SOFTWARE_SINGLE_STEP_P () && singlestep_breakpoints_inserted_p) { + /* Readjust the stop_pc as it is off by DECR_PC_AFTER_BREAK + compared to the value it would have if the system stepping + capability was used. This allows the rest of the code in + this function to use this address without having to worry + whether software single step is in use or not. */ + if (DECR_PC_AFTER_BREAK) + { + stop_pc -= DECR_PC_AFTER_BREAK; + write_pc_pid (stop_pc, ecs->ptid); + } + + sw_single_step_trap_p = 1; ecs->random_signal = 0; } } @@ -2111,14 +2124,16 @@ handle_inferior_event (struct execution_control_state *ecs) (&stop_pc, /* Pass TRUE if our reason for stopping is something other than hitting a breakpoint. We do this by checking that + either we detected earlier a software single step trap or 1) stepping is going on and 2) we didn't hit a breakpoint in a signal handler without an intervening stop in sigtramp, which is detected by a new stack pointer value below any usual function calling stack adjustments. */ - (currently_stepping (ecs) - && prev_pc != stop_pc - DECR_PC_AFTER_BREAK - && !(step_range_end - && INNER_THAN (read_sp (), (step_sp - 16))))); + sw_single_step_trap_p + || (currently_stepping (ecs) + && prev_pc != stop_pc - DECR_PC_AFTER_BREAK + && !(step_range_end + && INNER_THAN (read_sp (), (step_sp - 16))))); /* Following in case break condition called a function. */ stop_print_frame = 1; |