target-s390x/arch_dump.c

   1 /*
   2  * writing ELF notes for s390x arch
   3  *
   4  *
   5  * Copyright IBM Corp. 2012, 2013
   6  *
   7  *     Ekaterina Tumanova <tumanova@linux.vnet.ibm.com>
   8  *
   9  * This work is licensed under the terms of the GNU GPL, version 2 or later.
  10  * See the COPYING file in the top-level directory.
  11  *
  12  */
  13
  14 #include "cpu.h"
  15 #include "elf.h"
  16 #include "exec/cpu-all.h"
  17 #include "sysemu/dump.h"
  18 #include "sysemu/kvm.h"
  19
  20
  21 struct S390xUserRegsStruct {
  22     uint64_t psw[2];
  23     uint64_t gprs[16];
  24     uint32_t acrs[16];
  25 } QEMU_PACKED;
  26
  27 typedef struct S390xUserRegsStruct S390xUserRegs;
  28
  29 struct S390xElfPrstatusStruct {
  30     uint8_t pad1[32];
  31     uint32_t pid;
  32     uint8_t pad2[76];
  33     S390xUserRegs regs;
  34     uint8_t pad3[16];
  35 } QEMU_PACKED;
  36
  37 typedef struct S390xElfPrstatusStruct S390xElfPrstatus;
  38
  39 struct S390xElfFpregsetStruct {
  40     uint32_t fpc;
  41     uint32_t pad;
  42     uint64_t fprs[16];
  43 } QEMU_PACKED;
  44
  45 typedef struct S390xElfFpregsetStruct S390xElfFpregset;
  46
  47 typedef struct noteStruct {
  48     Elf64_Nhdr hdr;
  49     char name[5];
  50     char pad3[3];
  51     union {
  52         S390xElfPrstatus prstatus;
  53         S390xElfFpregset fpregset;
  54         uint32_t prefix;
  55         uint64_t timer;
  56         uint64_t todcmp;
  57         uint32_t todpreg;
  58         uint64_t ctrs[16];
  59     } contents;
  60 } QEMU_PACKED Note;
  61
  62 static void s390x_write_elf64_prstatus(Note *note, S390CPU *cpu)
  63 {
  64     int i;
  65     S390xUserRegs *regs;
  66
  67     note->hdr.n_type = cpu_to_be32(NT_PRSTATUS);
  68
  69     regs = &(note->contents.prstatus.regs);
  70     regs->psw[0] = cpu_to_be64(cpu->env.psw.mask);
  71     regs->psw[1] = cpu_to_be64(cpu->env.psw.addr);
  72     for (i = 0; i <= 15; i++) {
  73         regs->acrs[i] = cpu_to_be32(cpu->env.aregs[i]);
  74         regs->gprs[i] = cpu_to_be64(cpu->env.regs[i]);
  75     }
  76 }
  77
  78 static void s390x_write_elf64_fpregset(Note *note, S390CPU *cpu)
  79 {
  80     int i;
  81
  82     note->hdr.n_type = cpu_to_be32(NT_FPREGSET);
  83     note->contents.fpregset.fpc = cpu_to_be32(cpu->env.fpc);
  84     for (i = 0; i <= 15; i++) {
  85         note->contents.fpregset.fprs[i] = cpu_to_be64(cpu->env.fregs[i].ll);
  86     }
  87 }
  88
  89
  90 static void s390x_write_elf64_timer(Note *note, S390CPU *cpu)
  91 {
  92     note->hdr.n_type = cpu_to_be32(NT_S390_TIMER);
  93     note->contents.timer = cpu_to_be64((uint64_t)(cpu->env.cputm));
  94 }
  95
  96 static void s390x_write_elf64_todcmp(Note *note, S390CPU *cpu)
  97 {
  98     note->hdr.n_type = cpu_to_be32(NT_S390_TODCMP);
  99     note->contents.todcmp = cpu_to_be64((uint64_t)(cpu->env.ckc));
 100 }
 101
 102 static void s390x_write_elf64_todpreg(Note *note, S390CPU *cpu)
 103 {
 104     note->hdr.n_type = cpu_to_be32(NT_S390_TODPREG);
 105     note->contents.todpreg = cpu_to_be32((uint32_t)(cpu->env.todpr));
 106 }
 107
 108 static void s390x_write_elf64_ctrs(Note *note, S390CPU *cpu)
 109 {
 110     int i;
 111
 112     note->hdr.n_type = cpu_to_be32(NT_S390_CTRS);
 113
 114     for (i = 0; i <= 15; i++) {
 115         note->contents.ctrs[i] = cpu_to_be64(cpu->env.cregs[i]);
 116     }
 117 }
 118
 119 static void s390x_write_elf64_prefix(Note *note, S390CPU *cpu)
 120 {
 121     note->hdr.n_type = cpu_to_be32(NT_S390_PREFIX);
 122     note->contents.prefix = cpu_to_be32((uint32_t)(cpu->env.psa));
 123 }
 124
 125
 126 struct NoteFuncDescStruct {
 127     int contents_size;
 128     void (*note_contents_func)(Note *note, S390CPU *cpu);
 129 } note_func[] = {
 130     {sizeof(((Note *)0)->contents.prstatus), s390x_write_elf64_prstatus},
 131     {sizeof(((Note *)0)->contents.prefix),   s390x_write_elf64_prefix},
 132     {sizeof(((Note *)0)->contents.fpregset), s390x_write_elf64_fpregset},
 133     {sizeof(((Note *)0)->contents.ctrs),     s390x_write_elf64_ctrs},
 134     {sizeof(((Note *)0)->contents.timer),    s390x_write_elf64_timer},
 135     {sizeof(((Note *)0)->contents.todcmp),   s390x_write_elf64_todcmp},
 136     {sizeof(((Note *)0)->contents.todpreg),  s390x_write_elf64_todpreg},
 137     { 0, NULL}
 138 };
 139
 140 typedef struct NoteFuncDescStruct NoteFuncDesc;
 141
 142
 143 static int s390x_write_all_elf64_notes(const char *note_name,
 144                                        WriteCoreDumpFunction f,
 145                                        S390CPU *cpu, int id,
 146                                        void *opaque)
 147 {
 148     Note note;
 149     NoteFuncDesc *nf;
 150     int note_size;
 151     int ret = -1;
 152
 153     for (nf = note_func; nf->note_contents_func; nf++) {
 154         note.hdr.n_namesz = cpu_to_be32(sizeof(note.name));
 155         note.hdr.n_descsz = cpu_to_be32(nf->contents_size);
 156         strncpy(note.name, note_name, sizeof(note.name));
 157         (*nf->note_contents_func)(&note, cpu);
 158
 159         note_size = sizeof(note) - sizeof(note.contents) + nf->contents_size;
 160         ret = f(&note, note_size, opaque);
 161
 162         if (ret < 0) {
 163             return -1;
 164         }
 165
 166     }
 167
 168     return 0;
 169 }
 170
 171
 172 int s390_cpu_write_elf64_note(WriteCoreDumpFunction f, CPUState *cs,
 173                               int cpuid, void *opaque)
 174 {
 175     S390CPU *cpu = S390_CPU(cs);
 176     return s390x_write_all_elf64_notes("CORE", f, cpu, cpuid, opaque);
 177 }
 178
 179 int cpu_get_dump_info(ArchDumpInfo *info,
 180                       const struct GuestPhysBlockList *guest_phys_blocks)
 181 {
 182     info->d_machine = EM_S390;
 183     info->d_endian = ELFDATA2MSB;
 184     info->d_class = ELFCLASS64;
 185
 186     return 0;
 187 }
 188
 189 ssize_t cpu_get_note_size(int class, int machine, int nr_cpus)
 190 {
 191     int name_size = 8; /* "CORE" or "QEMU" rounded */
 192     size_t elf_note_size = 0;
 193     int note_head_size;
 194     NoteFuncDesc *nf;
 195
 196     assert(class == ELFCLASS64);
 197     assert(machine == EM_S390);
 198
 199     note_head_size = sizeof(Elf64_Nhdr);
 200
 201     for (nf = note_func; nf->note_contents_func; nf++) {
 202         elf_note_size = elf_note_size + note_head_size + name_size +
 203                         nf->contents_size;
 204     }
 205
 206     return (elf_note_size) * nr_cpus;
 207 }
 208
 209 int s390_cpu_write_elf64_qemunote(WriteCoreDumpFunction f,
 210                                   CPUState *cpu, void *opaque)
 211 {
 212     return 0;
 213 }