| 1 | /* Low level Alpha GNU/Linux interface, for GDB when running native. |
| 2 | Copyright (C) 2005-2015 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 "defs.h" |
| 20 | #include "target.h" |
| 21 | #include "regcache.h" |
| 22 | #include "linux-nat.h" |
| 23 | |
| 24 | #include "alpha-tdep.h" |
| 25 | |
| 26 | #include "nat/gdb_ptrace.h" |
| 27 | #include <alpha/ptrace.h> |
| 28 | |
| 29 | #include <sys/procfs.h> |
| 30 | #include "gregset.h" |
| 31 | |
| 32 | /* The address of UNIQUE for ptrace. */ |
| 33 | #define ALPHA_UNIQUE_PTRACE_ADDR 65 |
| 34 | |
| 35 | |
| 36 | /* See the comment in m68k-tdep.c regarding the utility of these |
| 37 | functions. */ |
| 38 | |
| 39 | void |
| 40 | supply_gregset (struct regcache *regcache, const gdb_gregset_t *gregsetp) |
| 41 | { |
| 42 | const long *regp = (const long *)gregsetp; |
| 43 | |
| 44 | /* PC is in slot 32, UNIQUE is in slot 33. */ |
| 45 | alpha_supply_int_regs (regcache, -1, regp, regp + 31, regp + 32); |
| 46 | } |
| 47 | |
| 48 | void |
| 49 | fill_gregset (const struct regcache *regcache, |
| 50 | gdb_gregset_t *gregsetp, int regno) |
| 51 | { |
| 52 | long *regp = (long *)gregsetp; |
| 53 | |
| 54 | /* PC is in slot 32, UNIQUE is in slot 33. */ |
| 55 | alpha_fill_int_regs (regcache, regno, regp, regp + 31, regp + 32); |
| 56 | } |
| 57 | |
| 58 | /* Now we do the same thing for floating-point registers. |
| 59 | Again, see the comments in m68k-tdep.c. */ |
| 60 | |
| 61 | void |
| 62 | supply_fpregset (struct regcache *regcache, const gdb_fpregset_t *fpregsetp) |
| 63 | { |
| 64 | const long *regp = (const long *)fpregsetp; |
| 65 | |
| 66 | /* FPCR is in slot 32. */ |
| 67 | alpha_supply_fp_regs (regcache, -1, regp, regp + 31); |
| 68 | } |
| 69 | |
| 70 | void |
| 71 | fill_fpregset (const struct regcache *regcache, |
| 72 | gdb_fpregset_t *fpregsetp, int regno) |
| 73 | { |
| 74 | long *regp = (long *)fpregsetp; |
| 75 | |
| 76 | /* FPCR is in slot 32. */ |
| 77 | alpha_fill_fp_regs (regcache, regno, regp, regp + 31); |
| 78 | } |
| 79 | |
| 80 | |
| 81 | static CORE_ADDR |
| 82 | alpha_linux_register_u_offset (struct gdbarch *gdbarch, int regno, int store_p) |
| 83 | { |
| 84 | if (regno == gdbarch_pc_regnum (gdbarch)) |
| 85 | return PC; |
| 86 | if (regno == ALPHA_UNIQUE_REGNUM) |
| 87 | return ALPHA_UNIQUE_PTRACE_ADDR; |
| 88 | if (regno < gdbarch_fp0_regnum (gdbarch)) |
| 89 | return GPR_BASE + regno; |
| 90 | else |
| 91 | return FPR_BASE + regno - gdbarch_fp0_regnum (gdbarch); |
| 92 | } |
| 93 | |
| 94 | void _initialize_alpha_linux_nat (void); |
| 95 | |
| 96 | void |
| 97 | _initialize_alpha_linux_nat (void) |
| 98 | { |
| 99 | linux_nat_add_target (linux_trad_target (alpha_linux_register_u_offset)); |
| 100 | } |