aboutsummaryrefslogtreecommitdiff
path: root/target-ppc/arch_dump.c
blob: 40282a1f50fa853958019e9bbbd58800ef8e0f20 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
/*
 * writing ELF notes for ppc64 arch
 *
 *
 * Copyright IBM, Corp. 2013
 *
 * Authors:
 * Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
 *
 * This work is licensed under the terms of the GNU GPL, version 2.  See
 * the COPYING file in the top-level directory.
 *
 */

#include "qemu/osdep.h"
#include "cpu.h"
#include "elf.h"
#include "exec/cpu-all.h"
#include "sysemu/dump.h"
#include "sysemu/kvm.h"

struct PPC64UserRegStruct {
    uint64_t gpr[32];
    uint64_t nip;
    uint64_t msr;
    uint64_t orig_gpr3;
    uint64_t ctr;
    uint64_t link;
    uint64_t xer;
    uint64_t ccr;
    uint64_t softe;
    uint64_t trap;
    uint64_t dar;
    uint64_t dsisr;
    uint64_t result;
} QEMU_PACKED;

struct PPC64ElfPrstatus {
    char pad1[112];
    struct PPC64UserRegStruct pr_reg;
    uint64_t pad2[4];
} QEMU_PACKED;


struct PPC64ElfFpregset {
    uint64_t fpr[32];
    uint64_t fpscr;
}  QEMU_PACKED;


struct PPC64ElfVmxregset {
    ppc_avr_t avr[32];
    ppc_avr_t vscr;
    union {
        ppc_avr_t unused;
        uint32_t value;
    } vrsave;
}  QEMU_PACKED;

struct PPC64ElfVsxregset {
    uint64_t vsr[32];
}  QEMU_PACKED;

struct PPC64ElfSperegset {
    uint32_t evr[32];
    uint64_t spe_acc;
    uint32_t spe_fscr;
}  QEMU_PACKED;

typedef struct noteStruct {
    Elf64_Nhdr hdr;
    char name[5];
    char pad3[3];
    union {
        struct PPC64ElfPrstatus  prstatus;
        struct PPC64ElfFpregset  fpregset;
        struct PPC64ElfVmxregset vmxregset;
        struct PPC64ElfVsxregset vsxregset;
        struct PPC64ElfSperegset speregset;
    } contents;
} QEMU_PACKED Note;

typedef struct NoteFuncArg {
    Note note;
    DumpState *state;
} NoteFuncArg;

static void ppc64_write_elf64_prstatus(NoteFuncArg *arg, PowerPCCPU *cpu)
{
    int i;
    uint64_t cr;
    struct PPC64ElfPrstatus *prstatus;
    struct PPC64UserRegStruct *reg;
    Note *note = &arg->note;
    DumpState *s = arg->state;

    note->hdr.n_type = cpu_to_dump32(s, NT_PRSTATUS);

    prstatus = &note->contents.prstatus;
    memset(prstatus, 0, sizeof(*prstatus));
    reg = &prstatus->pr_reg;

    for (i = 0; i < 32; i++) {
        reg->gpr[i] = cpu_to_dump64(s, cpu->env.gpr[i]);
    }
    reg->nip = cpu_to_dump64(s, cpu->env.nip);
    reg->msr = cpu_to_dump64(s, cpu->env.msr);
    reg->ctr = cpu_to_dump64(s, cpu->env.ctr);
    reg->link = cpu_to_dump64(s, cpu->env.lr);
    reg->xer = cpu_to_dump64(s, cpu_read_xer(&cpu->env));

    cr = 0;
    for (i = 0; i < 8; i++) {
        cr |= (cpu->env.crf[i] & 15) << (4 * (7 - i));
    }
    reg->ccr = cpu_to_dump64(s, cr);
}

static void ppc64_write_elf64_fpregset(NoteFuncArg *arg, PowerPCCPU *cpu)
{
    int i;
    struct PPC64ElfFpregset  *fpregset;
    Note *note = &arg->note;
    DumpState *s = arg->state;

    note->hdr.n_type = cpu_to_dump32(s, NT_PRFPREG);

    fpregset = &note->contents.fpregset;
    memset(fpregset, 0, sizeof(*fpregset));

    for (i = 0; i < 32; i++) {
        fpregset->fpr[i] = cpu_to_dump64(s, cpu->env.fpr[i]);
    }
    fpregset->fpscr = cpu_to_dump64(s, cpu->env.fpscr);
}

static void ppc64_write_elf64_vmxregset(NoteFuncArg *arg, PowerPCCPU *cpu)
{
    int i;
    struct PPC64ElfVmxregset *vmxregset;
    Note *note = &arg->note;
    DumpState *s = arg->state;

    note->hdr.n_type = cpu_to_dump32(s, NT_PPC_VMX);
    vmxregset = &note->contents.vmxregset;
    memset(vmxregset, 0, sizeof(*vmxregset));

    for (i = 0; i < 32; i++) {
        bool needs_byteswap;

#ifdef HOST_WORDS_BIGENDIAN
        needs_byteswap = s->dump_info.d_endian == ELFDATA2LSB;
#else
        needs_byteswap = s->dump_info.d_endian == ELFDATA2MSB;
#endif

        if (needs_byteswap) {
            vmxregset->avr[i].u64[0] = bswap64(cpu->env.avr[i].u64[1]);
            vmxregset->avr[i].u64[1] = bswap64(cpu->env.avr[i].u64[0]);
        } else {
            vmxregset->avr[i].u64[0] = cpu->env.avr[i].u64[0];
            vmxregset->avr[i].u64[1] = cpu->env.avr[i].u64[1];
        }
    }
    vmxregset->vscr.u32[3] = cpu_to_dump32(s, cpu->env.vscr);
}
static void ppc64_write_elf64_vsxregset(NoteFuncArg *arg, PowerPCCPU *cpu)
{
    int i;
    struct PPC64ElfVsxregset *vsxregset;
    Note *note = &arg->note;
    DumpState *s = arg->state;

    note->hdr.n_type = cpu_to_dump32(s, NT_PPC_VSX);
    vsxregset = &note->contents.vsxregset;
    memset(vsxregset, 0, sizeof(*vsxregset));

    for (i = 0; i < 32; i++) {
        vsxregset->vsr[i] = cpu_to_dump64(s, cpu->env.vsr[i]);
    }
}
static void ppc64_write_elf64_speregset(NoteFuncArg *arg, PowerPCCPU *cpu)
{
    struct PPC64ElfSperegset *speregset;
    Note *note = &arg->note;
    DumpState *s = arg->state;

    note->hdr.n_type = cpu_to_dump32(s, NT_PPC_SPE);
    speregset = &note->contents.speregset;
    memset(speregset, 0, sizeof(*speregset));

    speregset->spe_acc = cpu_to_dump64(s, cpu->env.spe_acc);
    speregset->spe_fscr = cpu_to_dump32(s, cpu->env.spe_fscr);
}

static const struct NoteFuncDescStruct {
    int contents_size;
    void (*note_contents_func)(NoteFuncArg *arg, PowerPCCPU *cpu);
} note_func[] = {
    {sizeof(((Note *)0)->contents.prstatus),  ppc64_write_elf64_prstatus},
    {sizeof(((Note *)0)->contents.fpregset),  ppc64_write_elf64_fpregset},
    {sizeof(((Note *)0)->contents.vmxregset), ppc64_write_elf64_vmxregset},
    {sizeof(((Note *)0)->contents.vsxregset), ppc64_write_elf64_vsxregset},
    {sizeof(((Note *)0)->contents.speregset), ppc64_write_elf64_speregset},
    { 0, NULL}
};

typedef struct NoteFuncDescStruct NoteFuncDesc;

int cpu_get_dump_info(ArchDumpInfo *info,
                      const struct GuestPhysBlockList *guest_phys_blocks)
{
    PowerPCCPU *cpu = POWERPC_CPU(first_cpu);
    PowerPCCPUClass *pcc = POWERPC_CPU_GET_CLASS(cpu);

    info->d_machine = EM_PPC64;
    info->d_class = ELFCLASS64;
    if ((*pcc->interrupts_big_endian)(cpu)) {
        info->d_endian = ELFDATA2MSB;
    } else {
        info->d_endian = ELFDATA2LSB;
    }
    /* 64KB is the max page size for pseries kernel */
    if (strncmp(object_get_typename(qdev_get_machine()),
                "pseries-", 8) == 0) {
        info->page_size = (1U << 16);
    }

    return 0;
}

ssize_t cpu_get_note_size(int class, int machine, int nr_cpus)
{
    int name_size = 8; /* "CORE" or "QEMU" rounded */
    size_t elf_note_size = 0;
    int note_head_size;
    const NoteFuncDesc *nf;

    if (class != ELFCLASS64) {
        return -1;
    }
    assert(machine == EM_PPC64);

    note_head_size = sizeof(Elf64_Nhdr);

    for (nf = note_func; nf->note_contents_func; nf++) {
        elf_note_size = elf_note_size + note_head_size + name_size +
                        nf->contents_size;
    }

    return (elf_note_size) * nr_cpus;
}

static int ppc64_write_all_elf64_notes(const char *note_name,
                                       WriteCoreDumpFunction f,
                                       PowerPCCPU *cpu, int id,
                                       void *opaque)
{
    NoteFuncArg arg = { .state = opaque };
    int ret = -1;
    int note_size;
    const NoteFuncDesc *nf;

    for (nf = note_func; nf->note_contents_func; nf++) {
        arg.note.hdr.n_namesz = cpu_to_dump32(opaque, sizeof(arg.note.name));
        arg.note.hdr.n_descsz = cpu_to_dump32(opaque, nf->contents_size);
        strncpy(arg.note.name, note_name, sizeof(arg.note.name));

        (*nf->note_contents_func)(&arg, cpu);

        note_size =
            sizeof(arg.note) - sizeof(arg.note.contents) + nf->contents_size;
        ret = f(&arg.note, note_size, opaque);
        if (ret < 0) {
            return -1;
        }
    }
    return 0;
}

int ppc64_cpu_write_elf64_note(WriteCoreDumpFunction f, CPUState *cs,
                               int cpuid, void *opaque)
{
    PowerPCCPU *cpu = POWERPC_CPU(cs);
    return ppc64_write_all_elf64_notes("CORE", f, cpu, cpuid, opaque);
}