/* GNU/Linux/PowerPC64 specific low level interface, for the remote server for
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/* GNU/Linux/PowerPC64 specific low level interface, for the remote server for
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GDB.
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GDB.
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Copyright (C) 1995, 1996, 1998, 1999, 2000, 2001, 2002, 2005, 2007, 2008
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Copyright (C) 1995, 1996, 1998, 1999, 2000, 2001, 2002, 2005, 2007, 2008
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Free Software Foundation, Inc.
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Free Software Foundation, Inc.
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This file is part of GDB.
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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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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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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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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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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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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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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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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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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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#include "server.h"
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#include "server.h"
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#include "linux-low.h"
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#include "linux-low.h"
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#include <asm/ptrace.h>
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#include <asm/ptrace.h>
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#define ppc_num_regs 71
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#define ppc_num_regs 71
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/* We use a constant for FPSCR instead of PT_FPSCR, because
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/* We use a constant for FPSCR instead of PT_FPSCR, because
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many shipped PPC64 kernels had the wrong value in ptrace.h. */
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many shipped PPC64 kernels had the wrong value in ptrace.h. */
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static int ppc_regmap[] =
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static int ppc_regmap[] =
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{PT_R0 * 8, PT_R1 * 8, PT_R2 * 8, PT_R3 * 8,
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{PT_R0 * 8, PT_R1 * 8, PT_R2 * 8, PT_R3 * 8,
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PT_R4 * 8, PT_R5 * 8, PT_R6 * 8, PT_R7 * 8,
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PT_R4 * 8, PT_R5 * 8, PT_R6 * 8, PT_R7 * 8,
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PT_R8 * 8, PT_R9 * 8, PT_R10 * 8, PT_R11 * 8,
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PT_R8 * 8, PT_R9 * 8, PT_R10 * 8, PT_R11 * 8,
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PT_R12 * 8, PT_R13 * 8, PT_R14 * 8, PT_R15 * 8,
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PT_R12 * 8, PT_R13 * 8, PT_R14 * 8, PT_R15 * 8,
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PT_R16 * 8, PT_R17 * 8, PT_R18 * 8, PT_R19 * 8,
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PT_R16 * 8, PT_R17 * 8, PT_R18 * 8, PT_R19 * 8,
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PT_R20 * 8, PT_R21 * 8, PT_R22 * 8, PT_R23 * 8,
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PT_R20 * 8, PT_R21 * 8, PT_R22 * 8, PT_R23 * 8,
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PT_R24 * 8, PT_R25 * 8, PT_R26 * 8, PT_R27 * 8,
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PT_R24 * 8, PT_R25 * 8, PT_R26 * 8, PT_R27 * 8,
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PT_R28 * 8, PT_R29 * 8, PT_R30 * 8, PT_R31 * 8,
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PT_R28 * 8, PT_R29 * 8, PT_R30 * 8, PT_R31 * 8,
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PT_FPR0*8, PT_FPR0*8 + 8, PT_FPR0*8+16, PT_FPR0*8+24,
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PT_FPR0*8, PT_FPR0*8 + 8, PT_FPR0*8+16, PT_FPR0*8+24,
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PT_FPR0*8+32, PT_FPR0*8+40, PT_FPR0*8+48, PT_FPR0*8+56,
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PT_FPR0*8+32, PT_FPR0*8+40, PT_FPR0*8+48, PT_FPR0*8+56,
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PT_FPR0*8+64, PT_FPR0*8+72, PT_FPR0*8+80, PT_FPR0*8+88,
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PT_FPR0*8+64, PT_FPR0*8+72, PT_FPR0*8+80, PT_FPR0*8+88,
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PT_FPR0*8+96, PT_FPR0*8+104, PT_FPR0*8+112, PT_FPR0*8+120,
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PT_FPR0*8+96, PT_FPR0*8+104, PT_FPR0*8+112, PT_FPR0*8+120,
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PT_FPR0*8+128, PT_FPR0*8+136, PT_FPR0*8+144, PT_FPR0*8+152,
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PT_FPR0*8+128, PT_FPR0*8+136, PT_FPR0*8+144, PT_FPR0*8+152,
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PT_FPR0*8+160, PT_FPR0*8+168, PT_FPR0*8+176, PT_FPR0*8+184,
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PT_FPR0*8+160, PT_FPR0*8+168, PT_FPR0*8+176, PT_FPR0*8+184,
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PT_FPR0*8+192, PT_FPR0*8+200, PT_FPR0*8+208, PT_FPR0*8+216,
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PT_FPR0*8+192, PT_FPR0*8+200, PT_FPR0*8+208, PT_FPR0*8+216,
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PT_FPR0*8+224, PT_FPR0*8+232, PT_FPR0*8+240, PT_FPR0*8+248,
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PT_FPR0*8+224, PT_FPR0*8+232, PT_FPR0*8+240, PT_FPR0*8+248,
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PT_NIP * 8, PT_MSR * 8, PT_CCR * 8, PT_LNK * 8,
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PT_NIP * 8, PT_MSR * 8, PT_CCR * 8, PT_LNK * 8,
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PT_CTR * 8, PT_XER * 8, PT_FPR0*8 + 256 };
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PT_CTR * 8, PT_XER * 8, PT_FPR0*8 + 256 };
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static int
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static int
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ppc_cannot_store_register (int regno)
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ppc_cannot_store_register (int regno)
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{
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{
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return 0;
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return 0;
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}
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}
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static int
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static int
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ppc_cannot_fetch_register (int regno)
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ppc_cannot_fetch_register (int regno)
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{
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{
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return 0;
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return 0;
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}
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}
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static CORE_ADDR
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static CORE_ADDR
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ppc_get_pc (void)
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ppc_get_pc (void)
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{
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{
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unsigned long pc;
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unsigned long pc;
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collect_register_by_name ("pc", &pc);
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collect_register_by_name ("pc", &pc);
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return (CORE_ADDR) pc;
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return (CORE_ADDR) pc;
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}
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}
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static void
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static void
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ppc_set_pc (CORE_ADDR pc)
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ppc_set_pc (CORE_ADDR pc)
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{
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{
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unsigned long newpc = pc;
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unsigned long newpc = pc;
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supply_register_by_name ("pc", &newpc);
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supply_register_by_name ("pc", &newpc);
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}
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}
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/* Correct in either endianness.
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/* Correct in either endianness.
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This instruction is "twge r2, r2", which GDB uses as a software
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This instruction is "twge r2, r2", which GDB uses as a software
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breakpoint. */
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breakpoint. */
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static const unsigned int ppc_breakpoint = 0x7d821008;
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static const unsigned int ppc_breakpoint = 0x7d821008;
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#define ppc_breakpoint_len 4
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#define ppc_breakpoint_len 4
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static int
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static int
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ppc_breakpoint_at (CORE_ADDR where)
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ppc_breakpoint_at (CORE_ADDR where)
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{
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{
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unsigned int insn;
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unsigned int insn;
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(*the_target->read_memory) (where, (unsigned char *) &insn, 4);
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(*the_target->read_memory) (where, (unsigned char *) &insn, 4);
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if (insn == ppc_breakpoint)
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if (insn == ppc_breakpoint)
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return 1;
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return 1;
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/* If necessary, recognize more trap instructions here. GDB only uses the
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/* If necessary, recognize more trap instructions here. GDB only uses the
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one. */
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one. */
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return 0;
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return 0;
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}
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}
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/* Provide only a fill function for the general register set. ps_lgetregs
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/* Provide only a fill function for the general register set. ps_lgetregs
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will use this for NPTL support. */
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will use this for NPTL support. */
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static void ppc_fill_gregset (void *buf)
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static void ppc_fill_gregset (void *buf)
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{
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{
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int i;
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int i;
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for (i = 0; i < 32; i++)
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for (i = 0; i < 32; i++)
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collect_register (i, (char *) buf + ppc_regmap[i]);
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collect_register (i, (char *) buf + ppc_regmap[i]);
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for (i = 64; i < 70; i++)
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for (i = 64; i < 70; i++)
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collect_register (i, (char *) buf + ppc_regmap[i]);
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collect_register (i, (char *) buf + ppc_regmap[i]);
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}
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}
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#ifdef __ALTIVEC__
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#ifdef __ALTIVEC__
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#ifndef PTRACE_GETVRREGS
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#ifndef PTRACE_GETVRREGS
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#define PTRACE_GETVRREGS 18
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#define PTRACE_GETVRREGS 18
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#define PTRACE_SETVRREGS 19
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#define PTRACE_SETVRREGS 19
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#endif
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#endif
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#define SIZEOF_VRREGS 33*16+4
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#define SIZEOF_VRREGS 33*16+4
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static void
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static void
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ppc_fill_vrregset (void *buf)
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ppc_fill_vrregset (void *buf)
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{
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{
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int i, base;
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int i, base;
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char *regset = buf;
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char *regset = buf;
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base = find_regno ("vr0");
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base = find_regno ("vr0");
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for (i = 0; i < 32; i++)
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for (i = 0; i < 32; i++)
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collect_register (base + i, ®set[i * 16]);
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collect_register (base + i, ®set[i * 16]);
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collect_register_by_name ("vscr", ®set[32 * 16 + 12]);
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collect_register_by_name ("vscr", ®set[32 * 16 + 12]);
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collect_register_by_name ("vrsave", ®set[33 * 16]);
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collect_register_by_name ("vrsave", ®set[33 * 16]);
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}
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}
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static void
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static void
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ppc_store_vrregset (const void *buf)
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ppc_store_vrregset (const void *buf)
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{
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{
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int i, base;
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int i, base;
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const char *regset = buf;
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const char *regset = buf;
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base = find_regno ("vr0");
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base = find_regno ("vr0");
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for (i = 0; i < 32; i++)
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for (i = 0; i < 32; i++)
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supply_register (base + i, ®set[i * 16]);
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supply_register (base + i, ®set[i * 16]);
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supply_register_by_name ("vscr", ®set[32 * 16 + 12]);
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supply_register_by_name ("vscr", ®set[32 * 16 + 12]);
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supply_register_by_name ("vrsave", ®set[33 * 16]);
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supply_register_by_name ("vrsave", ®set[33 * 16]);
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}
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}
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#endif /* __ALTIVEC__ */
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#endif /* __ALTIVEC__ */
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struct regset_info target_regsets[] = {
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struct regset_info target_regsets[] = {
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/* List the extra register sets before GENERAL_REGS. That way we will
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/* List the extra register sets before GENERAL_REGS. That way we will
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fetch them every time, but still fall back to PTRACE_PEEKUSER for the
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fetch them every time, but still fall back to PTRACE_PEEKUSER for the
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general registers. Some kernels support these, but not the newer
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general registers. Some kernels support these, but not the newer
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PPC_PTRACE_GETREGS. */
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PPC_PTRACE_GETREGS. */
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#ifdef __ALTIVEC__
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#ifdef __ALTIVEC__
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{ PTRACE_GETVRREGS, PTRACE_SETVRREGS, SIZEOF_VRREGS, EXTENDED_REGS,
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{ PTRACE_GETVRREGS, PTRACE_SETVRREGS, SIZEOF_VRREGS, EXTENDED_REGS,
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ppc_fill_vrregset, ppc_store_vrregset },
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ppc_fill_vrregset, ppc_store_vrregset },
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#endif
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#endif
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{ 0, 0, 0, GENERAL_REGS, ppc_fill_gregset, NULL },
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{ 0, 0, 0, GENERAL_REGS, ppc_fill_gregset, NULL },
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{ 0, 0, -1, -1, NULL, NULL }
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{ 0, 0, -1, -1, NULL, NULL }
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};
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};
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struct linux_target_ops the_low_target = {
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struct linux_target_ops the_low_target = {
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ppc_num_regs,
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ppc_num_regs,
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ppc_regmap,
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ppc_regmap,
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ppc_cannot_fetch_register,
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ppc_cannot_fetch_register,
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ppc_cannot_store_register,
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ppc_cannot_store_register,
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ppc_get_pc,
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ppc_get_pc,
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ppc_set_pc,
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ppc_set_pc,
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(const unsigned char *) &ppc_breakpoint,
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(const unsigned char *) &ppc_breakpoint,
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ppc_breakpoint_len,
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ppc_breakpoint_len,
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NULL,
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NULL,
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0,
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0,
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ppc_breakpoint_at,
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ppc_breakpoint_at,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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1
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1
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};
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};
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