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* tm-hppa.h (PROLOGUE_FIRSTLINE_OVERLAP): Delete. Causes more

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problems than it fixes.
	* hppa-tdep.c (skip_prologue): If we exit the main loop without
	finding all the register saves, retry again without looking for
	the registers we could not find the first time.

Better fix for 7768.
This commit is contained in:
Jeff Law
1995-08-22 08:04:15 +00:00
parent 06997b9a10
commit 7e72b115ad
3 changed files with 32 additions and 8 deletions
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25
gdb/hppa-tdep.c
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@@ -2288,10 +2288,15 @@ skip_prologue (pc)
CORE_ADDR pc;
{
char buf[4];
CORE_ADDR orig_pc = pc;
unsigned long inst, stack_remaining, save_gr, save_fr, save_rp, save_sp;
unsigned long args_stored, status, i;
unsigned long args_stored, status, i, restart_gr, restart_fr;
struct unwind_table_entry *u;
restart_gr = 0;
restart_fr = 0;
restart:
u = find_unwind_entry (pc);
if (!u)
return pc;
@@ -2322,11 +2327,13 @@ skip_prologue (pc)
save_gr |= (1 << i);
}
save_gr &= ~restart_gr;
/* Turn the Entry_FR field into a bitmask too. */
save_fr = 0;
for (i = 12; i < u->Entry_FR + 12; i++)
save_fr |= (1 << i);
save_fr &= ~restart_fr;
/* Loop until we find everything of interest or hit a branch.
@@ -2476,6 +2483,22 @@ skip_prologue (pc)
pc += 4;
}
/* We've got a tenative location for the end of the prologue. However
because of limitations in the unwind descriptor mechanism we may
have went too far into user code looking for the save of a register
that does not exist. So, if there registers we expected to be saved
but never were, mask them out and restart.
This should only happen in optimized code, and should be very rare. */
if (save_gr || save_fr
&& ! (restart_fr || restart_gr))
{
pc = orig_pc;
restart_gr = save_gr;
restart_fr = save_fr;
goto restart;
}
return pc;
}