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* hppa-tdep.c (frameless_function_invocation): If no unwind

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descriptor was found, then assume this was not a frameless
        function invocation.
        (frame_saved_pc): If the saved PC is in a linker stub, then
        return the return address which the linker stub will return to.
This commit is contained in:
Jeff Law 1994-04-06 00:51:50 +00:00
parent 220e70d9f8
commit 7f43b9b70d
2 changed files with 24 additions and 8 deletions
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6
gdb/ChangeLog
View file

@ -1,5 +1,11 @@
Tue Apr 5 15:29:25 1994 Jeffrey A. Law (law@snake.cs.utah.edu)
* hppa-tdep.c (frameless_function_invocation): If no unwind
descriptor was found, then assume this was not a frameless
function invocation.
(frame_saved_pc): If the saved PC is in a linker stub, then
return the return address which the linker stub will return to.
* xm-hppab.h: Never define USG.
* xm-hppah.h: Always define USG.

26
gdb/hppa-tdep.c
View file

@ -485,7 +485,7 @@ frameless_function_invocation (frame)
u = find_unwind_entry (frame->pc);
if (u == 0)
return frameless_look_for_prologue (frame);
return 0;
return (u->Total_frame_size == 0 && u->stub_type == 0);
}
@ -506,6 +506,7 @@ frame_saved_pc (frame)
FRAME frame;
{
CORE_ADDR pc = get_frame_pc (frame);
struct unwind_table_entry *u;
/* BSD, HPUX & OSF1 all lay out the hardware state in the same manner
at the base of the frame in an interrupt handler. Registers within
@ -522,6 +523,7 @@ frame_saved_pc (frame)
return rp;
}
restart:
if (frameless_function_invocation (frame))
{
int ret_regnum;
@ -542,12 +544,12 @@ frame_saved_pc (frame)
fi = get_frame_info (frame->next);
get_frame_saved_regs (fi, &saved_regs);
if (read_memory_integer (saved_regs.regs[FLAGS_REGNUM] & 0x2, 4))
return read_memory_integer (saved_regs.regs[31], 4);
pc = read_memory_integer (saved_regs.regs[31], 4) & ~0x3;
else
return read_memory_integer (saved_regs.regs[RP_REGNUM], 4);
pc = read_memory_integer (saved_regs.regs[RP_REGNUM], 4) & ~0x3;
}
else
return read_register (ret_regnum) & ~0x3;
pc = read_register (ret_regnum) & ~0x3;
}
else
{
@ -567,15 +569,23 @@ frame_saved_pc (frame)
fi = get_frame_info (frame->next);
get_frame_saved_regs (fi, &saved_regs);
if (read_memory_integer (saved_regs.regs[FLAGS_REGNUM] & 0x2, 4))
return read_memory_integer (saved_regs.regs[31], 4);
pc = read_memory_integer (saved_regs.regs[31], 4) & ~0x3;
else
return read_memory_integer (saved_regs.regs[RP_REGNUM], 4);
pc = read_memory_integer (saved_regs.regs[RP_REGNUM], 4) & ~0x3;
}
else if (rp_offset == 0)
return read_register (RP_REGNUM) & ~0x3;
pc = read_register (RP_REGNUM) & ~0x3;
else
return read_memory_integer (frame->frame + rp_offset, 4) & ~0x3;
pc = read_memory_integer (frame->frame + rp_offset, 4) & ~0x3;
}
/* If PC is inside a linker stub, then dig out the address the stub
will return to. */
u = find_unwind_entry (pc);
if (u && u->stub_type != 0)
goto restart;
return pc;
}
/* We need to correct the PC and the FP for the outermost frame when we are