| /* GNU/Linux/PowerPC64 specific low level interface, for the remote server for |
| GDB. |
| Copyright (C) 1995, 1996, 1998, 1999, 2000, 2001, 2002, 2005 |
| 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., 51 Franklin Street, Fifth Floor, |
| Boston, MA 02110-1301, USA. */ |
| |
| #include "server.h" |
| #include "linux-low.h" |
| |
| #include <asm/ptrace.h> |
| |
| #define ppc_num_regs 71 |
| |
| /* We use a constant for FPSCR instead of PT_FPSCR, because |
| many shipped PPC64 kernels had the wrong value in ptrace.h. */ |
| static int ppc_regmap[] = |
| {PT_R0 * 8, PT_R1 * 8, PT_R2 * 8, PT_R3 * 8, |
| PT_R4 * 8, PT_R5 * 8, PT_R6 * 8, PT_R7 * 8, |
| PT_R8 * 8, PT_R9 * 8, PT_R10 * 8, PT_R11 * 8, |
| PT_R12 * 8, PT_R13 * 8, PT_R14 * 8, PT_R15 * 8, |
| PT_R16 * 8, PT_R17 * 8, PT_R18 * 8, PT_R19 * 8, |
| PT_R20 * 8, PT_R21 * 8, PT_R22 * 8, PT_R23 * 8, |
| PT_R24 * 8, PT_R25 * 8, PT_R26 * 8, PT_R27 * 8, |
| PT_R28 * 8, PT_R29 * 8, PT_R30 * 8, PT_R31 * 8, |
| PT_FPR0*8, PT_FPR0*8 + 8, PT_FPR0*8+16, PT_FPR0*8+24, |
| PT_FPR0*8+32, PT_FPR0*8+40, PT_FPR0*8+48, PT_FPR0*8+56, |
| PT_FPR0*8+64, PT_FPR0*8+72, PT_FPR0*8+80, PT_FPR0*8+88, |
| PT_FPR0*8+96, PT_FPR0*8+104, PT_FPR0*8+112, PT_FPR0*8+120, |
| PT_FPR0*8+128, PT_FPR0*8+136, PT_FPR0*8+144, PT_FPR0*8+152, |
| PT_FPR0*8+160, PT_FPR0*8+168, PT_FPR0*8+176, PT_FPR0*8+184, |
| PT_FPR0*8+192, PT_FPR0*8+200, PT_FPR0*8+208, PT_FPR0*8+216, |
| PT_FPR0*8+224, PT_FPR0*8+232, PT_FPR0*8+240, PT_FPR0*8+248, |
| PT_NIP * 8, PT_MSR * 8, PT_CCR * 8, PT_LNK * 8, |
| PT_CTR * 8, PT_XER * 8, PT_FPR0*8 + 256 }; |
| |
| static int |
| ppc_cannot_store_register (int regno) |
| { |
| return 0; |
| } |
| |
| static int |
| ppc_cannot_fetch_register (int regno) |
| { |
| return 0; |
| } |
| |
| static CORE_ADDR |
| ppc_get_pc (void) |
| { |
| unsigned long pc; |
| |
| collect_register_by_name ("pc", &pc); |
| return (CORE_ADDR) pc; |
| } |
| |
| static void |
| ppc_set_pc (CORE_ADDR pc) |
| { |
| unsigned long newpc = pc; |
| |
| supply_register_by_name ("pc", &newpc); |
| } |
| |
| /* Correct in either endianness. |
| This instruction is "twge r2, r2", which GDB uses as a software |
| breakpoint. */ |
| static const unsigned int ppc_breakpoint = 0x7d821008; |
| #define ppc_breakpoint_len 4 |
| |
| static int |
| ppc_breakpoint_at (CORE_ADDR where) |
| { |
| unsigned int insn; |
| |
| (*the_target->read_memory) (where, (unsigned char *) &insn, 4); |
| if (insn == ppc_breakpoint) |
| return 1; |
| /* If necessary, recognize more trap instructions here. GDB only uses the |
| one. */ |
| return 0; |
| } |
| |
| /* Provide only a fill function for the general register set. ps_lgetregs |
| will use this for NPTL support. */ |
| |
| static void ppc_fill_gregset (void *buf) |
| { |
| int i; |
| |
| for (i = 0; i < 32; i++) |
| collect_register (i, (char *) buf + ppc_regmap[i]); |
| |
| for (i = 64; i < 70; i++) |
| collect_register (i, (char *) buf + ppc_regmap[i]); |
| } |
| |
| struct regset_info target_regsets[] = { |
| { 0, 0, 0, GENERAL_REGS, ppc_fill_gregset, NULL }, |
| { 0, 0, -1, -1, NULL, NULL } |
| }; |
| |
| struct linux_target_ops the_low_target = { |
| ppc_num_regs, |
| ppc_regmap, |
| ppc_cannot_fetch_register, |
| ppc_cannot_store_register, |
| ppc_get_pc, |
| ppc_set_pc, |
| (const unsigned char *) &ppc_breakpoint, |
| ppc_breakpoint_len, |
| NULL, |
| 0, |
| ppc_breakpoint_at, |
| NULL, |
| NULL, |
| NULL, |
| NULL, |
| 1 |
| }; |