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target-arm: dump-guest-memory: add prfpreg notes for aarch64

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Signed-off-by: Andrew Jones <drjones@redhat.com>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Message-id: 1452542185-10914-7-git-send-email-drjones@redhat.com
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Andrew Jones 2016-01-11 20:56:23 +01:00 committed by Peter Maydell
parent da2b91409f
commit bada8e4470
1 changed files with 71 additions and 8 deletions
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79
target-arm/arch_dump.c
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@ -45,13 +45,36 @@ struct aarch64_elf_prstatus {
QEMU_BUILD_BUG_ON(sizeof(struct aarch64_elf_prstatus) != 392);
/* struct user_fpsimd_state from arch/arm64/include/uapi/asm/ptrace.h
*
* While the vregs member of user_fpsimd_state is of type __uint128_t,
* QEMU uses an array of uint64_t, where the high half of the 128-bit
* value is always in the 2n+1'th index. Thus we also break the 128-
* bit values into two halves in this reproduction of user_fpsimd_state.
*/
struct aarch64_user_vfp_state {
uint64_t vregs[64];
uint32_t fpsr;
uint32_t fpcr;
char pad[8];
} QEMU_PACKED;
QEMU_BUILD_BUG_ON(sizeof(struct aarch64_user_vfp_state) != 528);
struct aarch64_note {
Elf64_Nhdr hdr;
char name[8]; /* align_up(sizeof("CORE"), 4) */
struct aarch64_elf_prstatus prstatus;
union {
struct aarch64_elf_prstatus prstatus;
struct aarch64_user_vfp_state vfp;
};
} QEMU_PACKED;
QEMU_BUILD_BUG_ON(sizeof(struct aarch64_note) != 412);
#define AARCH64_NOTE_HEADER_SIZE offsetof(struct aarch64_note, prstatus)
#define AARCH64_PRSTATUS_NOTE_SIZE \
(AARCH64_NOTE_HEADER_SIZE + sizeof(struct aarch64_elf_prstatus))
#define AARCH64_PRFPREG_NOTE_SIZE \
(AARCH64_NOTE_HEADER_SIZE + sizeof(struct aarch64_user_vfp_state))
static void aarch64_note_init(struct aarch64_note *note, DumpState *s,
const char *name, Elf64_Word namesz,
@ -66,6 +89,42 @@ static void aarch64_note_init(struct aarch64_note *note, DumpState *s,
memcpy(note->name, name, namesz);
}
static int aarch64_write_elf64_prfpreg(WriteCoreDumpFunction f,
CPUARMState *env, int cpuid,
DumpState *s)
{
struct aarch64_note note;
int ret, i;
aarch64_note_init(&note, s, "CORE", 5, NT_PRFPREG, sizeof(note.vfp));
for (i = 0; i < 64; ++i) {
note.vfp.vregs[i] = cpu_to_dump64(s, float64_val(env->vfp.regs[i]));
}
if (s->dump_info.d_endian == ELFDATA2MSB) {
/* For AArch64 we must always swap the vfp.regs's 2n and 2n+1
* entries when generating BE notes, because even big endian
* hosts use 2n+1 for the high half.
*/
for (i = 0; i < 32; ++i) {
uint64_t tmp = note.vfp.vregs[2*i];
note.vfp.vregs[2*i] = note.vfp.vregs[2*i+1];
note.vfp.vregs[2*i+1] = tmp;
}
}
note.vfp.fpsr = cpu_to_dump32(s, vfp_get_fpsr(env));
note.vfp.fpcr = cpu_to_dump32(s, vfp_get_fpcr(env));
ret = f(&note, AARCH64_PRFPREG_NOTE_SIZE, s);
if (ret < 0) {
return -1;
}
return 0;
}
int arm_cpu_write_elf64_note(WriteCoreDumpFunction f, CPUState *cs,
int cpuid, void *opaque)
{
@ -78,6 +137,7 @@ int arm_cpu_write_elf64_note(WriteCoreDumpFunction f, CPUState *cs,
aarch64_note_init(&note, s, "CORE", 5, NT_PRSTATUS, sizeof(note.prstatus));
note.prstatus.pr_pid = cpu_to_dump32(s, cpuid);
note.prstatus.pr_fpvalid = cpu_to_dump32(s, 1);
if (!is_a64(env)) {
aarch64_sync_32_to_64(env);
@ -95,12 +155,12 @@ int arm_cpu_write_elf64_note(WriteCoreDumpFunction f, CPUState *cs,
note.prstatus.pr_reg.pc = cpu_to_dump64(s, env->pc);
note.prstatus.pr_reg.pstate = cpu_to_dump64(s, pstate);
ret = f(&note, sizeof(note), s);
ret = f(&note, AARCH64_PRSTATUS_NOTE_SIZE, s);
if (ret < 0) {
return -1;
}
return 0;
return aarch64_write_elf64_prfpreg(f, env, cpuid, s);
}
/* struct pt_regs from arch/arm/include/asm/ptrace.h */
@ -129,7 +189,9 @@ struct arm_note {
struct arm_elf_prstatus prstatus;
} QEMU_PACKED;
QEMU_BUILD_BUG_ON(sizeof(struct arm_note) != 168);
#define ARM_NOTE_HEADER_SIZE offsetof(struct arm_note, prstatus)
#define ARM_PRSTATUS_NOTE_SIZE \
(ARM_NOTE_HEADER_SIZE + sizeof(struct arm_elf_prstatus))
static void arm_note_init(struct arm_note *note, DumpState *s,
const char *name, Elf32_Word namesz,
@ -161,7 +223,7 @@ int arm_cpu_write_elf32_note(WriteCoreDumpFunction f, CPUState *cs,
}
note.prstatus.pr_reg.regs[16] = cpu_to_dump32(s, cpsr_read(env));
ret = f(&note, sizeof(note), s);
ret = f(&note, ARM_PRSTATUS_NOTE_SIZE, s);
if (ret < 0) {
return -1;
}
@ -221,9 +283,10 @@ ssize_t cpu_get_note_size(int class, int machine, int nr_cpus)
size_t note_size;
if (class == ELFCLASS64) {
note_size = sizeof(struct aarch64_note);
note_size = AARCH64_PRSTATUS_NOTE_SIZE;
note_size += AARCH64_PRFPREG_NOTE_SIZE;
} else {
note_size = sizeof(struct arm_note);
note_size = ARM_PRSTATUS_NOTE_SIZE;
}
return note_size * nr_cpus;