| 1 | /* GNU/Linux/m32r specific low level interface, for the remote server for GDB. |
| 2 | Copyright (C) 2005, 2007, 2008, 2009, 2010 Free Software Foundation, Inc. |
| 3 | |
| 4 | This file is part of GDB. |
| 5 | |
| 6 | This program is free software; you can redistribute it and/or modify |
| 7 | it under the terms of the GNU General Public License as published by |
| 8 | the Free Software Foundation; either version 3 of the License, or |
| 9 | (at your option) any later version. |
| 10 | |
| 11 | This program is distributed in the hope that it will be useful, |
| 12 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | GNU General Public License for more details. |
| 15 | |
| 16 | You should have received a copy of the GNU General Public License |
| 17 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
| 18 | |
| 19 | #include "server.h" |
| 20 | #include "linux-low.h" |
| 21 | |
| 22 | #ifdef HAVE_SYS_REG_H |
| 23 | #include <sys/reg.h> |
| 24 | #endif |
| 25 | |
| 26 | /* Defined in auto-generated file reg-m32r.c. */ |
| 27 | void init_registers_m32r (void); |
| 28 | |
| 29 | #define m32r_num_regs 25 |
| 30 | |
| 31 | static int m32r_regmap[] = { |
| 32 | #ifdef PT_R0 |
| 33 | PT_R0, PT_R1, PT_R2, PT_R3, PT_R4, PT_R5, PT_R6, PT_R7, |
| 34 | PT_R8, PT_R9, PT_R10, PT_R11, PT_R12, PT_FP, PT_LR, PT_SPU, |
| 35 | PT_PSW, PT_CBR, PT_SPI, PT_SPU, PT_BPC, PT_PC, PT_ACCL, PT_ACCH, PT_EVB |
| 36 | #else |
| 37 | 4 * 4, 4 * 5, 4 * 6, 4 * 7, 4 * 0, 4 * 1, 4 * 2, 4 * 8, |
| 38 | 4 * 9, 4 * 10, 4 * 11, 4 * 12, 4 * 13, 4 * 24, 4 * 25, 4 * 23, |
| 39 | 4 * 19, 4 * 31, 4 * 26, 4 * 23, 4 * 20, 4 * 30, 4 * 16, 4 * 15, 4 * 32 |
| 40 | #endif |
| 41 | }; |
| 42 | |
| 43 | static int |
| 44 | m32r_cannot_store_register (int regno) |
| 45 | { |
| 46 | return (regno >= m32r_num_regs); |
| 47 | } |
| 48 | |
| 49 | static int |
| 50 | m32r_cannot_fetch_register (int regno) |
| 51 | { |
| 52 | return (regno >= m32r_num_regs); |
| 53 | } |
| 54 | |
| 55 | static CORE_ADDR |
| 56 | m32r_get_pc (struct regcache *regcache) |
| 57 | { |
| 58 | unsigned long pc; |
| 59 | collect_register_by_name (regcache, "pc", &pc); |
| 60 | if (debug_threads) |
| 61 | fprintf (stderr, "stop pc is %08lx\n", pc); |
| 62 | return pc; |
| 63 | } |
| 64 | |
| 65 | static void |
| 66 | m32r_set_pc (struct regcache *regcache, CORE_ADDR pc) |
| 67 | { |
| 68 | unsigned long newpc = pc; |
| 69 | supply_register_by_name (regcache, "pc", &newpc); |
| 70 | } |
| 71 | |
| 72 | static const unsigned short m32r_breakpoint = 0x10f1; |
| 73 | #define m32r_breakpoint_len 2 |
| 74 | |
| 75 | static int |
| 76 | m32r_breakpoint_at (CORE_ADDR where) |
| 77 | { |
| 78 | unsigned short insn; |
| 79 | |
| 80 | (*the_target->read_memory) (where, (unsigned char *) &insn, |
| 81 | m32r_breakpoint_len); |
| 82 | if (insn == m32r_breakpoint) |
| 83 | return 1; |
| 84 | |
| 85 | /* If necessary, recognize more trap instructions here. GDB only uses the |
| 86 | one. */ |
| 87 | return 0; |
| 88 | } |
| 89 | |
| 90 | struct linux_target_ops the_low_target = { |
| 91 | init_registers_m32r, |
| 92 | m32r_num_regs, |
| 93 | m32r_regmap, |
| 94 | m32r_cannot_fetch_register, |
| 95 | m32r_cannot_store_register, |
| 96 | m32r_get_pc, |
| 97 | m32r_set_pc, |
| 98 | (const unsigned char *) &m32r_breakpoint, |
| 99 | m32r_breakpoint_len, |
| 100 | NULL, |
| 101 | 0, |
| 102 | m32r_breakpoint_at, |
| 103 | }; |