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/* Kernel core dump functions below target vector, for GDB on FreeBSD/sparc64.
Copyright 1986, 1987, 1989, 1991, 1992, 1993, 1994, 1995
Free Software Foundation, Inc.
This file is part of GDB.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
__FBSDID("$FreeBSD$");
#define SPARC_INTREG_SIZE 8
static void
fetch_kcore_registers (struct pcb *pcbp)
{
static struct frame top;
CORE_ADDR f_addr;
int i;
/* Get the register values out of the sys pcb and store them where
`read_register' will find them. */
/*
* XXX many registers aren't available.
* XXX for the non-core case, the registers are stale - they are for
* the last context switch to the debugger.
* XXX do something with the floating-point registers?
*/
supply_register (SP_REGNUM, (char *)&pcbp->pcb_ufp);
supply_register (PC_REGNUM, (char *)&pcbp->pcb_pc);
f_addr = extract_address (&pcbp->pcb_ufp, SPARC_INTREG_SIZE);
/* Load the previous frame by hand (XXX) and supply it. */
read_memory (f_addr + SPOFF, (char *)&top, sizeof (top));
for (i = 0; i < 8; i++)
supply_register (i + L0_REGNUM, (char *)&top.fr_local[i]);
for (i = 0; i < 8; i++)
supply_register (i + I0_REGNUM, (char *)&top.fr_in[i]);
}
CORE_ADDR
fbsd_kern_frame_saved_pc (struct frame_info *fi)
{
struct minimal_symbol *sym;
CORE_ADDR frame, pc_addr, pc;
char *buf;
buf = alloca (MAX_REGISTER_RAW_SIZE);
/* XXX: duplicates fi->extra_info->bottom. */
frame = (fi->next != NULL) ? fi->next->frame : read_sp ();
pc_addr = frame + offsetof (struct frame, fr_in[7]);
#define READ_PC(pc, a, b) do { \
read_memory (a, b, SPARC_INTREG_SIZE); \
pc = extract_address (b, SPARC_INTREG_SIZE); \
} while (0)
READ_PC (pc, pc_addr, buf);
sym = lookup_minimal_symbol_by_pc (pc);
if (sym != NULL)
{
if (strncmp (SYMBOL_NAME (sym), "tl0_", 4) == 0 ||
strcmp (SYMBOL_NAME (sym), "btext") == 0 ||
strcmp (SYMBOL_NAME (sym), "mp_startup") == 0 ||
strcmp (SYMBOL_NAME (sym), "fork_trampoline") == 0)
{
/*
* Ugly kluge: user space addresses aren't separated from kernel
* ones by range; if encountering a trap from user space, just
* return a 0 to stop the trace.
* Do the same for entry points of kernel processes to avoid
* printing garbage.
*/
pc = 0;
}
if (strncmp (SYMBOL_NAME (sym), "tl1_", 4) == 0)
{
pc_addr = fi->frame + sizeof (struct frame) +
offsetof (struct trapframe, tf_tpc);
READ_PC (pc, pc_addr, buf);
}
}
return (pc);
}
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