| 1 | /* GNU/Linux S/390 specific low level interface, for the remote server |
| 2 | for GDB. |
| 3 | Copyright (C) 2001, 2002, 2005 |
| 4 | Free Software Foundation, Inc. |
| 5 | |
| 6 | This file is part of GDB. |
| 7 | |
| 8 | This program is free software; you can redistribute it and/or modify |
| 9 | it under the terms of the GNU General Public License as published by |
| 10 | the Free Software Foundation; either version 2 of the License, or |
| 11 | (at your option) any later version. |
| 12 | |
| 13 | This program is distributed in the hope that it will be useful, |
| 14 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 16 | GNU General Public License for more details. |
| 17 | |
| 18 | You should have received a copy of the GNU General Public License |
| 19 | along with this program; if not, write to the Free Software |
| 20 | Foundation, Inc., 51 Franklin Street, Fifth Floor, |
| 21 | Boston, MA 02110-1301, USA. */ |
| 22 | |
| 23 | /* This file is used for both 31-bit and 64-bit S/390 systems. */ |
| 24 | |
| 25 | #include "server.h" |
| 26 | #include "linux-low.h" |
| 27 | |
| 28 | #include <asm/ptrace.h> |
| 29 | |
| 30 | #define s390_num_regs 51 |
| 31 | |
| 32 | static int s390_regmap[] = { |
| 33 | PT_PSWMASK, PT_PSWADDR, |
| 34 | |
| 35 | PT_GPR0, PT_GPR1, PT_GPR2, PT_GPR3, |
| 36 | PT_GPR4, PT_GPR5, PT_GPR6, PT_GPR7, |
| 37 | PT_GPR8, PT_GPR9, PT_GPR10, PT_GPR11, |
| 38 | PT_GPR12, PT_GPR13, PT_GPR14, PT_GPR15, |
| 39 | |
| 40 | PT_ACR0, PT_ACR1, PT_ACR2, PT_ACR3, |
| 41 | PT_ACR4, PT_ACR5, PT_ACR6, PT_ACR7, |
| 42 | PT_ACR8, PT_ACR9, PT_ACR10, PT_ACR11, |
| 43 | PT_ACR12, PT_ACR13, PT_ACR14, PT_ACR15, |
| 44 | |
| 45 | PT_FPC, |
| 46 | |
| 47 | #ifndef __s390x__ |
| 48 | PT_FPR0_HI, PT_FPR1_HI, PT_FPR2_HI, PT_FPR3_HI, |
| 49 | PT_FPR4_HI, PT_FPR5_HI, PT_FPR6_HI, PT_FPR7_HI, |
| 50 | PT_FPR8_HI, PT_FPR9_HI, PT_FPR10_HI, PT_FPR11_HI, |
| 51 | PT_FPR12_HI, PT_FPR13_HI, PT_FPR14_HI, PT_FPR15_HI, |
| 52 | #else |
| 53 | PT_FPR0, PT_FPR1, PT_FPR2, PT_FPR3, |
| 54 | PT_FPR4, PT_FPR5, PT_FPR6, PT_FPR7, |
| 55 | PT_FPR8, PT_FPR9, PT_FPR10, PT_FPR11, |
| 56 | PT_FPR12, PT_FPR13, PT_FPR14, PT_FPR15, |
| 57 | #endif |
| 58 | }; |
| 59 | |
| 60 | static int |
| 61 | s390_cannot_fetch_register (int regno) |
| 62 | { |
| 63 | if (s390_regmap[regno] == -1) |
| 64 | return 1; |
| 65 | |
| 66 | return 0; |
| 67 | } |
| 68 | |
| 69 | static int |
| 70 | s390_cannot_store_register (int regno) |
| 71 | { |
| 72 | if (s390_regmap[regno] == -1) |
| 73 | return 1; |
| 74 | |
| 75 | return 0; |
| 76 | } |
| 77 | |
| 78 | |
| 79 | static const unsigned char s390_breakpoint[] = { 0, 1 }; |
| 80 | #define s390_breakpoint_len 2 |
| 81 | |
| 82 | static CORE_ADDR |
| 83 | s390_get_pc () |
| 84 | { |
| 85 | unsigned long pc; |
| 86 | collect_register_by_name ("pswa", &pc); |
| 87 | #ifndef __s390x__ |
| 88 | pc &= 0x7fffffff; |
| 89 | #endif |
| 90 | return pc; |
| 91 | } |
| 92 | |
| 93 | static void |
| 94 | s390_set_pc (CORE_ADDR newpc) |
| 95 | { |
| 96 | unsigned long pc = newpc; |
| 97 | #ifndef __s390x__ |
| 98 | pc |= 0x80000000; |
| 99 | #endif |
| 100 | supply_register_by_name ("pswa", &pc); |
| 101 | } |
| 102 | |
| 103 | static int |
| 104 | s390_breakpoint_at (CORE_ADDR pc) |
| 105 | { |
| 106 | unsigned char c[s390_breakpoint_len]; |
| 107 | read_inferior_memory (pc, c, s390_breakpoint_len); |
| 108 | return memcmp (c, s390_breakpoint, s390_breakpoint_len) == 0; |
| 109 | } |
| 110 | |
| 111 | |
| 112 | struct linux_target_ops the_low_target = { |
| 113 | s390_num_regs, |
| 114 | s390_regmap, |
| 115 | s390_cannot_fetch_register, |
| 116 | s390_cannot_store_register, |
| 117 | s390_get_pc, |
| 118 | s390_set_pc, |
| 119 | s390_breakpoint, |
| 120 | s390_breakpoint_len, |
| 121 | NULL, |
| 122 | s390_breakpoint_len, |
| 123 | s390_breakpoint_at, |
| 124 | }; |
| 125 | |