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 "qemu/osdep.h"
  15 #include "cpu.h"
  16 #include "elf.h"
  17 #include "exec/cpu-all.h"
  18 #include "sysemu/dump.h"
  19 #include "sysemu/kvm.h"
  20
  21
  22 struct S390xUserRegsStruct {
  23     uint64_t psw[2];
  24     uint64_t gprs[16];
  25     uint32_t acrs[16];
  26 } QEMU_PACKED;
  27
  28 typedef struct S390xUserRegsStruct S390xUserRegs;
  29
  30 struct S390xElfPrstatusStruct {
  31     uint8_t pad1[32];
  32     uint32_t pid;
  33     uint8_t pad2[76];
  34     S390xUserRegs regs;
  35     uint8_t pad3[16];
  36 } QEMU_PACKED;
  37
  38 typedef struct S390xElfPrstatusStruct S390xElfPrstatus;
  39
  40 struct S390xElfFpregsetStruct {
  41     uint32_t fpc;
  42     uint32_t pad;
  43     uint64_t fprs[16];
  44 } QEMU_PACKED;
  45
  46 typedef struct S390xElfFpregsetStruct S390xElfFpregset;
  47
  48 struct S390xElfVregsLoStruct {
  49     uint64_t vregs[16];
  50 } QEMU_PACKED;
  51
  52 typedef struct S390xElfVregsLoStruct S390xElfVregsLo;
  53
  54 struct S390xElfVregsHiStruct {
  55     uint64_t vregs[16][2];
  56 } QEMU_PACKED;
  57
  58 typedef struct S390xElfVregsHiStruct S390xElfVregsHi;
  59
  60 typedef struct noteStruct {
  61     Elf64_Nhdr hdr;
  62     char name[8];
  63     union {
  64         S390xElfPrstatus prstatus;
  65         S390xElfFpregset fpregset;
  66         S390xElfVregsLo vregslo;
  67         S390xElfVregsHi vregshi;
  68         uint32_t prefix;
  69         uint64_t timer;
  70         uint64_t todcmp;
  71         uint32_t todpreg;
  72         uint64_t ctrs[16];
  73     } contents;
  74 } QEMU_PACKED Note;
  75
  76 static void s390x_write_elf64_prstatus(Note *note, S390CPU *cpu)
  77 {
  78     int i;
  79     S390xUserRegs *regs;
  80
  81     note->hdr.n_type = cpu_to_be32(NT_PRSTATUS);
  82
  83     regs = &(note->contents.prstatus.regs);
  84     regs->psw[0] = cpu_to_be64(cpu->env.psw.mask);
  85     regs->psw[1] = cpu_to_be64(cpu->env.psw.addr);
  86     for (i = 0; i <= 15; i++) {
  87         regs->acrs[i] = cpu_to_be32(cpu->env.aregs[i]);
  88         regs->gprs[i] = cpu_to_be64(cpu->env.regs[i]);
  89     }
  90 }
  91
  92 static void s390x_write_elf64_fpregset(Note *note, S390CPU *cpu)
  93 {
  94     int i;
  95     CPUS390XState *cs = &cpu->env;
  96
  97     note->hdr.n_type = cpu_to_be32(NT_FPREGSET);
  98     note->contents.fpregset.fpc = cpu_to_be32(cpu->env.fpc);
  99     for (i = 0; i <= 15; i++) {
 100         note->contents.fpregset.fprs[i] = cpu_to_be64(get_freg(cs, i)->ll);
 101     }
 102 }
 103
 104 static void s390x_write_elf64_vregslo(Note *note, S390CPU *cpu)
 105 {
 106     int i;
 107
 108     note->hdr.n_type = cpu_to_be32(NT_S390_VXRS_LOW);
 109     for (i = 0; i <= 15; i++) {
 110         note->contents.vregslo.vregs[i] = cpu_to_be64(cpu->env.vregs[i][1].ll);
 111     }
 112 }
 113
 114 static void s390x_write_elf64_vregshi(Note *note, S390CPU *cpu)
 115 {
 116     int i;
 117     S390xElfVregsHi *temp_vregshi;
 118
 119     temp_vregshi = &note->contents.vregshi;
 120
 121     note->hdr.n_type = cpu_to_be32(NT_S390_VXRS_HIGH);
 122     for (i = 0; i <= 15; i++) {
 123         temp_vregshi->vregs[i][0] = cpu_to_be64(cpu->env.vregs[i + 16][0].ll);
 124         temp_vregshi->vregs[i][1] = cpu_to_be64(cpu->env.vregs[i + 16][1].ll);
 125     }
 126 }
 127
 128 static void s390x_write_elf64_timer(Note *note, S390CPU *cpu)
 129 {
 130     note->hdr.n_type = cpu_to_be32(NT_S390_TIMER);
 131     note->contents.timer = cpu_to_be64((uint64_t)(cpu->env.cputm));
 132 }
 133
 134 static void s390x_write_elf64_todcmp(Note *note, S390CPU *cpu)
 135 {
 136     note->hdr.n_type = cpu_to_be32(NT_S390_TODCMP);
 137     note->contents.todcmp = cpu_to_be64((uint64_t)(cpu->env.ckc));
 138 }
 139
 140 static void s390x_write_elf64_todpreg(Note *note, S390CPU *cpu)
 141 {
 142     note->hdr.n_type = cpu_to_be32(NT_S390_TODPREG);
 143     note->contents.todpreg = cpu_to_be32((uint32_t)(cpu->env.todpr));
 144 }
 145
 146 static void s390x_write_elf64_ctrs(Note *note, S390CPU *cpu)
 147 {
 148     int i;
 149
 150     note->hdr.n_type = cpu_to_be32(NT_S390_CTRS);
 151
 152     for (i = 0; i <= 15; i++) {
 153         note->contents.ctrs[i] = cpu_to_be64(cpu->env.cregs[i]);
 154     }
 155 }
 156
 157 static void s390x_write_elf64_prefix(Note *note, S390CPU *cpu)
 158 {
 159     note->hdr.n_type = cpu_to_be32(NT_S390_PREFIX);
 160     note->contents.prefix = cpu_to_be32((uint32_t)(cpu->env.psa));
 161 }
 162
 163
 164 typedef struct NoteFuncDescStruct {
 165     int contents_size;
 166     void (*note_contents_func)(Note *note, S390CPU *cpu);
 167 } NoteFuncDesc;
 168
 169 static const NoteFuncDesc note_core[] = {
 170     {sizeof(((Note *)0)->contents.prstatus), s390x_write_elf64_prstatus},
 171     {sizeof(((Note *)0)->contents.fpregset), s390x_write_elf64_fpregset},
 172     { 0, NULL}
 173 };
 174
 175 static const NoteFuncDesc note_linux[] = {
 176     {sizeof(((Note *)0)->contents.prefix),   s390x_write_elf64_prefix},
 177     {sizeof(((Note *)0)->contents.ctrs),     s390x_write_elf64_ctrs},
 178     {sizeof(((Note *)0)->contents.timer),    s390x_write_elf64_timer},
 179     {sizeof(((Note *)0)->contents.todcmp),   s390x_write_elf64_todcmp},
 180     {sizeof(((Note *)0)->contents.todpreg),  s390x_write_elf64_todpreg},
 181     {sizeof(((Note *)0)->contents.vregslo),  s390x_write_elf64_vregslo},
 182     {sizeof(((Note *)0)->contents.vregshi),  s390x_write_elf64_vregshi},
 183     { 0, NULL}
 184 };
 185
 186 static int s390x_write_elf64_notes(const char *note_name,
 187                                        WriteCoreDumpFunction f,
 188                                        S390CPU *cpu, int id,
 189                                        void *opaque,
 190                                        const NoteFuncDesc *funcs)
 191 {
 192     Note note;
 193     const NoteFuncDesc *nf;
 194     int note_size;
 195     int ret = -1;
 196
 197     for (nf = funcs; nf->note_contents_func; nf++) {
 198         memset(&note, 0, sizeof(note));
 199         note.hdr.n_namesz = cpu_to_be32(strlen(note_name) + 1);
 200         note.hdr.n_descsz = cpu_to_be32(nf->contents_size);
 201         strncpy(note.name, note_name, sizeof(note.name));
 202         (*nf->note_contents_func)(&note, cpu);
 203
 204         note_size = sizeof(note) - sizeof(note.contents) + nf->contents_size;
 205         ret = f(&note, note_size, opaque);
 206
 207         if (ret < 0) {
 208             return -1;
 209         }
 210
 211     }
 212
 213     return 0;
 214 }
 215
 216
 217 int s390_cpu_write_elf64_note(WriteCoreDumpFunction f, CPUState *cs,
 218                               int cpuid, void *opaque)
 219 {
 220     S390CPU *cpu = S390_CPU(cs);
 221     int r;
 222
 223     r = s390x_write_elf64_notes("CORE", f, cpu, cpuid, opaque, note_core);
 224     if (r) {
 225         return r;
 226     }
 227     return s390x_write_elf64_notes("LINUX", f, cpu, cpuid, opaque, note_linux);
 228 }
 229
 230 int cpu_get_dump_info(ArchDumpInfo *info,
 231                       const struct GuestPhysBlockList *guest_phys_blocks)
 232 {
 233     info->d_machine = EM_S390;
 234     info->d_endian = ELFDATA2MSB;
 235     info->d_class = ELFCLASS64;
 236
 237     return 0;
 238 }
 239
 240 ssize_t cpu_get_note_size(int class, int machine, int nr_cpus)
 241 {
 242     int name_size = 8; /* "LINUX" or "CORE" + pad */
 243     size_t elf_note_size = 0;
 244     int note_head_size;
 245     const NoteFuncDesc *nf;
 246
 247     assert(class == ELFCLASS64);
 248     assert(machine == EM_S390);
 249
 250     note_head_size = sizeof(Elf64_Nhdr);
 251
 252     for (nf = note_core; nf->note_contents_func; nf++) {
 253         elf_note_size = elf_note_size + note_head_size + name_size +
 254                         nf->contents_size;
 255     }
 256     for (nf = note_linux; nf->note_contents_func; nf++) {
 257         elf_note_size = elf_note_size + note_head_size + name_size +
 258                         nf->contents_size;
 259     }
 260
 261     return (elf_note_size) * nr_cpus;
 262 }