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* mips-tdep.c: Call reinit_frame_cache every time the user does 

"set heuristic-fence-post".
This commit is contained in:
Jim Kingdon 1993-08-27 19:33:43 +00:00
parent 20bee06dad
commit 427fec5d1b
2 changed files with 34 additions and 10 deletions
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3
gdb/ChangeLog
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@ -1,5 +1,8 @@
Fri Aug 27 09:30:40 1993 Jim Kingdon (kingdon@deneb.cygnus.com)
* mips-tdep.c: Call reinit_frame_cache every time the user does
"set heuristic-fence-post".
* gdbserver/low-sun3.c: New file.
* gdbserver/Makefile.in, config/m68k/sun3.mh: Change accordingly.

41
gdb/mips-tdep.c
View File

@ -762,7 +762,7 @@ mips_frame_num_args(fip)
return -1;
}
/* Does this instruction involve use of a delay slot? */
/* Is this a branch with a delay slot? */
static int
is_delayed (insn)
unsigned long insn;
@ -772,7 +772,10 @@ is_delayed (insn)
if (mips_opcodes[i].pinfo != INSN_MACRO
&& (insn & mips_opcodes[i].mask) == mips_opcodes[i].match)
break;
return i < NUMOPCODES && (mips_opcodes[i].pinfo & ANY_DELAY);
return (i < NUMOPCODES
&& (mips_opcodes[i].pinfo & (INSN_UNCOND_BRANCH_DELAY
| INSN_COND_BRANCH_DELAY
| INSN_COND_BRANCH_LIKELY)));
}
/* To skip prologues, I use this predicate. Returns either PC itself
@ -910,12 +913,28 @@ mips_store_return_value (valtype, valbuf)
write_register_bytes(REGISTER_BYTE (regnum), raw_buffer, TYPE_LENGTH (valtype));
}
/* Let the user turn off floating point and set the fence post for
heuristic_proc_start. */
static void reinit_frame_cache_sfunc PARAMS ((char *, int
struct cmd_list_element *));
/* Just like reinit_frame_cache, but with the right arguments to be
callable as an sfunc. */
static void
reinit_frame_cache_sfunc (args, from_tty, c)
char *args;
int from_tty;
struct cmd_list_element *c;
{
reinit_frame_cache ();
}
void
_initialize_mips_tdep ()
{
struct cmd_list_element *c;
/* Let the user turn off floating point and set the fence post for
heuristic_proc_start. */
add_show_from_set
(add_set_cmd ("mipsfpu", class_support, var_boolean,
(char *) &mips_fpu,
@ -924,14 +943,16 @@ Turn off to avoid using floating point instructions when calling functions\n\
or dealing with return values.", &setlist),
&showlist);
add_show_from_set
(add_set_cmd ("heuristic-fence-post", class_support, var_uinteger,
(char *) &heuristic_fence_post,
"\
c = add_set_cmd ("heuristic-fence-post", class_support, var_uinteger,
(char *) &heuristic_fence_post,
"\
Set the distance searched for the start of a function.\n\
If you are debugging a stripped executable, GDB needs to search through the\n\
program for the start of a function. This command sets the distance of the\n\
search. The only need to set it is when debugging a stripped executable.",
&setlist),
&showlist);
&setlist);
/* We need to throw away the frame cache when we set this, since it
might change our ability to get backtraces. */
c->function.sfunc = reinit_frame_cache_sfunc;
add_show_from_set (c, &showlist);
}