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