| 1 | /* QNX Neutrino specific low level interface, for the remote server |
| 2 | for GDB. |
| 3 | Copyright (C) 2009-2020 Free Software Foundation, Inc. |
| 4 | |
| 5 | This file is part of GDB. |
| 6 | |
| 7 | This program is free software; you can redistribute it and/or modify |
| 8 | it under the terms of the GNU General Public License as published by |
| 9 | the Free Software Foundation; either version 3 of the License, or |
| 10 | (at your option) any later version. |
| 11 | |
| 12 | This program is distributed in the hope that it will be useful, |
| 13 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | GNU General Public License for more details. |
| 16 | |
| 17 | You should have received a copy of the GNU General Public License |
| 18 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
| 19 | |
| 20 | #include "server.h" |
| 21 | #include "nto-low.h" |
| 22 | #include "regdef.h" |
| 23 | #include "regcache.h" |
| 24 | |
| 25 | #include <x86/context.h> |
| 26 | #include "gdbsupport/x86-xstate.h" |
| 27 | #include "arch/i386.h" |
| 28 | #include "x86-tdesc.h" |
| 29 | |
| 30 | const unsigned char x86_breakpoint[] = { 0xCC }; |
| 31 | #define x86_breakpoint_len 1 |
| 32 | |
| 33 | /* Returns offset in appropriate Neutrino's context structure. |
| 34 | Defined in x86/context.h. |
| 35 | GDBREGNO is index into regs_i386 array. It is autogenerated and |
| 36 | hopefully doesn't change. */ |
| 37 | static int |
| 38 | nto_x86_register_offset (int gdbregno) |
| 39 | { |
| 40 | if (gdbregno >= 0 && gdbregno < 16) |
| 41 | { |
| 42 | X86_CPU_REGISTERS *dummy = (void*)0; |
| 43 | /* GPRs */ |
| 44 | switch (gdbregno) |
| 45 | { |
| 46 | case 0: |
| 47 | return (int)&(dummy->eax); |
| 48 | case 1: |
| 49 | return (int)&(dummy->ecx); |
| 50 | case 2: |
| 51 | return (int)&(dummy->edx); |
| 52 | case 3: |
| 53 | return (int)&(dummy->ebx); |
| 54 | case 4: |
| 55 | return (int)&(dummy->esp); |
| 56 | case 5: |
| 57 | return (int)&(dummy->ebp); |
| 58 | case 6: |
| 59 | return (int)&(dummy->esi); |
| 60 | case 7: |
| 61 | return (int)&(dummy->edi); |
| 62 | case 8: |
| 63 | return (int)&(dummy->eip); |
| 64 | case 9: |
| 65 | return (int)&(dummy->efl); |
| 66 | case 10: |
| 67 | return (int)&(dummy->cs); |
| 68 | case 11: |
| 69 | return (int)&(dummy->ss); |
| 70 | #ifdef __SEGMENTS__ |
| 71 | case 12: |
| 72 | return (int)&(dummy->ds); |
| 73 | case 13: |
| 74 | return (int)&(dummy->es); |
| 75 | case 14: |
| 76 | return (int)&(dummy->fs); |
| 77 | case 15: |
| 78 | return (int)&(dummy->gs); |
| 79 | #endif |
| 80 | default: |
| 81 | return -1; |
| 82 | } |
| 83 | } |
| 84 | return -1; |
| 85 | } |
| 86 | |
| 87 | static void |
| 88 | nto_x86_arch_setup (void) |
| 89 | { |
| 90 | the_low_target.num_regs = 16; |
| 91 | struct target_desc *tdesc |
| 92 | = i386_create_target_description (X86_XSTATE_SSE_MASK, false, false); |
| 93 | |
| 94 | init_target_desc (tdesc, i386_expedite_regs); |
| 95 | |
| 96 | nto_tdesc = tdesc; |
| 97 | } |
| 98 | |
| 99 | struct nto_target_ops the_low_target = |
| 100 | { |
| 101 | nto_x86_arch_setup, |
| 102 | 0, /* num_regs */ |
| 103 | nto_x86_register_offset, |
| 104 | x86_breakpoint, |
| 105 | x86_breakpoint_len |
| 106 | }; |
| 107 | |
| 108 | |
| 109 | |