backends/aarch64_corenote.c

   1 /* AArch64 specific core note handling.
   2    Copyright (C) 2013 Red Hat, Inc.
   3    This file is part of elfutils.
   4
   5    This file is free software; you can redistribute it and/or modify
   6    it under the terms of either
   7
   8      * the GNU Lesser General Public License as published by the Free
   9        Software Foundation; either version 3 of the License, or (at
  10        your option) any later version
  11
  12    or
  13
  14      * the GNU General Public License as published by the Free
  15        Software Foundation; either version 2 of the License, or (at
  16        your option) any later version
  17
  18    or both in parallel, as here.
  19
  20    elfutils is distributed in the hope that it will be useful, but
  21    WITHOUT ANY WARRANTY; without even the implied warranty of
  22    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  23    General Public License for more details.
  24
  25    You should have received copies of the GNU General Public License and
  26    the GNU Lesser General Public License along with this program.  If
  27    not, see <http://www.gnu.org/licenses/>.  */
  28
  29 #ifdef HAVE_CONFIG_H
  30 # include <config.h>
  31 #endif
  32
  33 #include <elf.h>
  34 #include <inttypes.h>
  35 #include <stddef.h>
  36 #include <stdio.h>
  37 #include <sys/time.h>
  38
  39 #define BACKEND aarch64_
  40 #include "libebl_CPU.h"
  41
  42 #define ULONG                   uint64_t
  43 #define PID_T                   int32_t
  44 #define UID_T                   uint32_t
  45 #define GID_T                   uint32_t
  46 #define ALIGN_ULONG             8
  47 #define ALIGN_PID_T             4
  48 #define ALIGN_UID_T             4
  49 #define ALIGN_GID_T             4
  50 #define TYPE_ULONG              ELF_T_XWORD
  51 #define TYPE_PID_T              ELF_T_SWORD
  52 #define TYPE_UID_T              ELF_T_WORD
  53 #define TYPE_GID_T              ELF_T_WORD
  54
  55 #define PRSTATUS_REGS_SIZE      (34 * 8)
  56
  57 static const Ebl_Register_Location prstatus_regs[] =
  58   {
  59     { .offset = 0, .regno = 0, .count = 32, .bits = 64 }, /* x0..x30, sp */
  60   };
  61
  62 #define PRSTATUS_REGSET_ITEMS                                           \
  63   {                                                                     \
  64     .name = "pc", .type = ELF_T_XWORD, .format = 'x',                   \
  65     .offset = (offsetof (struct EBLHOOK(prstatus), pr_reg)              \
  66                + PRSTATUS_REGS_SIZE - 16),                              \
  67     .group = "register",                                                \
  68     .pc_register = true                                                 \
  69   },                                                                    \
  70   {                                                                     \
  71     .name = "pstate", .type = ELF_T_XWORD, .format = 'x',               \
  72     .offset = (offsetof (struct EBLHOOK(prstatus), pr_reg)              \
  73                + PRSTATUS_REGS_SIZE - 8),                               \
  74     .group = "register"                                                 \
  75   }
  76
  77 static const Ebl_Register_Location aarch64_fpregset_regs[] =
  78   {
  79     { .offset = 0, .regno = 64, .count = 32, .bits = 128 }, /* v0..v31 */
  80   };
  81
  82 static const Ebl_Core_Item aarch64_fpregset_items[] =
  83   {
  84     {
  85       .name = "fpsr", .type = ELF_T_WORD, .format = 'x',
  86       .offset = 512, .group = "register"
  87     },
  88     {
  89       .name = "fpcr", .type = ELF_T_WORD, .format = 'x',
  90       .offset = 516, .group = "register"
  91     }
  92   };
  93
  94 static const Ebl_Core_Item aarch64_tls_items[] =
  95   {
  96     {
  97       .name = "tls", .type = ELF_T_XWORD, .format = 'x',
  98       .offset = 0, .group = "register"
  99     }
 100   };
 101
 102 #define AARCH64_HWBP_REG(KIND, N)                                       \
 103     {                                                                   \
 104       .name = "DBG" KIND "VR" #N "_EL1", .type = ELF_T_XWORD, .format = 'x', \
 105       .offset = 8 + N * 16, .group = "register"                         \
 106     },                                                                  \
 107     {                                                                   \
 108       .name = "DBG" KIND "CR" #N "_EL1", .type = ELF_T_WORD, .format = 'x', \
 109       .offset = 16 + N * 16, .group = "register"                        \
 110     }
 111
 112 #define AARCH64_BP_WP_GROUP(KIND, NAME)                                 \
 113   static const Ebl_Core_Item NAME[] =                                   \
 114     {                                                                   \
 115       {                                                                 \
 116         .name = "dbg_info", .type = ELF_T_WORD, .format = 'x',          \
 117         .offset = 0, .group = "control"                                 \
 118       },                                                                \
 119       /* N.B.: 4 bytes of padding here.  */                             \
 120                                                                         \
 121       AARCH64_HWBP_REG(KIND, 0),                                        \
 122       AARCH64_HWBP_REG(KIND, 1),                                        \
 123       AARCH64_HWBP_REG(KIND, 2),                                        \
 124       AARCH64_HWBP_REG(KIND, 3),                                        \
 125       AARCH64_HWBP_REG(KIND, 4),                                        \
 126       AARCH64_HWBP_REG(KIND, 5),                                        \
 127       AARCH64_HWBP_REG(KIND, 6),                                        \
 128       AARCH64_HWBP_REG(KIND, 7),                                        \
 129       AARCH64_HWBP_REG(KIND, 8),                                        \
 130       AARCH64_HWBP_REG(KIND, 9),                                        \
 131       AARCH64_HWBP_REG(KIND, 10),                                       \
 132       AARCH64_HWBP_REG(KIND, 11),                                       \
 133       AARCH64_HWBP_REG(KIND, 12),                                       \
 134       AARCH64_HWBP_REG(KIND, 13),                                       \
 135       AARCH64_HWBP_REG(KIND, 14),                                       \
 136       AARCH64_HWBP_REG(KIND, 15),                                       \
 137                                                                         \
 138       /* The DBGBVR+DBGBCR pair only takes 12 bytes.  There are 4 bytes \
 139          of padding at the end of each pair.  The item formatter in     \
 140          readelf can skip those, but the missing 4 bytes at the end of  \
 141          the whole block cause it to assume the whole item bunch        \
 142          repeats, so it loops around to read more.  Insert an explicit  \
 143          (but invisible) padding word.  */                              \
 144       {                                                                 \
 145         .name = "", .type = ELF_T_WORD, .format = 'h',                  \
 146         .offset = 260, .group = "register"                              \
 147       }                                                                 \
 148     }
 149
 150 AARCH64_BP_WP_GROUP ("B", aarch64_hw_bp_items);
 151 AARCH64_BP_WP_GROUP ("W", aarch64_hw_wp_items);
 152
 153 #undef AARCH64_BP_WP_GROUP
 154 #undef AARCH64_HWBP_REG
 155
 156 #define EXTRA_NOTES                                                     \
 157   EXTRA_REGSET_ITEMS (NT_FPREGSET, 528,                                 \
 158                       aarch64_fpregset_regs, aarch64_fpregset_items)    \
 159   EXTRA_ITEMS (NT_ARM_TLS, 8, aarch64_tls_items)                        \
 160   EXTRA_ITEMS (NT_ARM_HW_BREAK, 264, aarch64_hw_bp_items)               \
 161   EXTRA_ITEMS (NT_ARM_HW_WATCH, 264, aarch64_hw_wp_items)
 162
 163 #include "linux-core-note.c"