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[Qemu-devel] [PATCH 08/12 v14] target-i386: Add API to write cpu status
From: |
Wen Congyang |
Subject: |
[Qemu-devel] [PATCH 08/12 v14] target-i386: Add API to write cpu status to core file |
Date: |
Tue, 24 Apr 2012 12:07:33 +0800 |
User-agent: |
Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.1.9) Gecko/20100413 Fedora/3.0.4-2.fc13 Thunderbird/3.0.4 |
The core file has register's value. But it does not include all registers value.
Store the cpu status into QEMU note, and the user can get more information
from vmcore. If you change QEMUCPUState, please count up QEMUCPUSTATE_VERSION.
Signed-off-by: Wen Congyang <address@hidden>
---
cpu-all.h | 18 ++++++
target-i386/arch_dump.c | 149 +++++++++++++++++++++++++++++++++++++++++++++++
2 files changed, 167 insertions(+), 0 deletions(-)
diff --git a/cpu-all.h b/cpu-all.h
index f23b578..183409b 100644
--- a/cpu-all.h
+++ b/cpu-all.h
@@ -549,6 +549,10 @@ int cpu_write_elf64_note(write_core_dump_function f,
CPUArchState *env,
int cpuid, void *opaque);
int cpu_write_elf32_note(write_core_dump_function f, CPUArchState *env,
int cpuid, void *opaque);
+int cpu_write_elf64_qemunote(write_core_dump_function f, CPUArchState *env,
+ void *opaque);
+int cpu_write_elf32_qemunote(write_core_dump_function f, CPUArchState *env,
+ void *opaque);
#else
static inline int cpu_write_elf64_note(write_core_dump_function f,
CPUArchState *env, int cpuid,
@@ -563,6 +567,20 @@ static inline int
cpu_write_elf32_note(write_core_dump_function f,
{
return -1;
}
+
+static inline int cpu_write_elf64_qemunote(write_core_dump_function f,
+ CPUArchState *env,
+ void *opaque)
+{
+ return -1;
+}
+
+static inline int cpu_write_elf32_qemunote(write_core_dump_function f,
+ CPUArchState *env,
+ void *opaque)
+{
+ return -1;
+}
#endif
#endif /* CPU_ALL_H */
diff --git a/target-i386/arch_dump.c b/target-i386/arch_dump.c
index d55c2ce..ddbe20c 100644
--- a/target-i386/arch_dump.c
+++ b/target-i386/arch_dump.c
@@ -231,3 +231,152 @@ int cpu_write_elf32_note(write_core_dump_function f,
CPUArchState *env,
return 0;
}
+
+/*
+ * please count up QEMUCPUSTATE_VERSION if you have changed definition of
+ * QEMUCPUState, and modify the tools using this information accordingly.
+ */
+#define QEMUCPUSTATE_VERSION (1)
+
+struct QEMUCPUSegment {
+ uint32_t selector;
+ uint32_t limit;
+ uint32_t flags;
+ uint32_t pad;
+ uint64_t base;
+};
+
+typedef struct QEMUCPUSegment QEMUCPUSegment;
+
+struct QEMUCPUState {
+ uint32_t version;
+ uint32_t size;
+ uint64_t rax, rbx, rcx, rdx, rsi, rdi, rsp, rbp;
+ uint64_t r8, r9, r10, r11, r12, r13, r14, r15;
+ uint64_t rip, rflags;
+ QEMUCPUSegment cs, ds, es, fs, gs, ss;
+ QEMUCPUSegment ldt, tr, gdt, idt;
+ uint64_t cr[5];
+};
+
+typedef struct QEMUCPUState QEMUCPUState;
+
+static void copy_segment(QEMUCPUSegment *d, SegmentCache *s)
+{
+ d->pad = 0;
+ d->selector = s->selector;
+ d->limit = s->limit;
+ d->flags = s->flags;
+ d->base = s->base;
+}
+
+static void qemu_get_cpustate(QEMUCPUState *s, CPUArchState *env)
+{
+ memset(s, 0, sizeof(QEMUCPUState));
+
+ s->version = QEMUCPUSTATE_VERSION;
+ s->size = sizeof(QEMUCPUState);
+
+ s->rax = env->regs[R_EAX];
+ s->rbx = env->regs[R_EBX];
+ s->rcx = env->regs[R_ECX];
+ s->rdx = env->regs[R_EDX];
+ s->rsi = env->regs[R_ESI];
+ s->rdi = env->regs[R_EDI];
+ s->rsp = env->regs[R_ESP];
+ s->rbp = env->regs[R_EBP];
+#ifdef TARGET_X86_64
+ s->r8 = env->regs[8];
+ s->r9 = env->regs[9];
+ s->r10 = env->regs[10];
+ s->r11 = env->regs[11];
+ s->r12 = env->regs[12];
+ s->r13 = env->regs[13];
+ s->r14 = env->regs[14];
+ s->r15 = env->regs[15];
+#endif
+ s->rip = env->eip;
+ s->rflags = env->eflags;
+
+ copy_segment(&s->cs, &env->segs[R_CS]);
+ copy_segment(&s->ds, &env->segs[R_DS]);
+ copy_segment(&s->es, &env->segs[R_ES]);
+ copy_segment(&s->fs, &env->segs[R_FS]);
+ copy_segment(&s->gs, &env->segs[R_GS]);
+ copy_segment(&s->ss, &env->segs[R_SS]);
+ copy_segment(&s->ldt, &env->ldt);
+ copy_segment(&s->tr, &env->tr);
+ copy_segment(&s->gdt, &env->gdt);
+ copy_segment(&s->idt, &env->idt);
+
+ s->cr[0] = env->cr[0];
+ s->cr[1] = env->cr[1];
+ s->cr[2] = env->cr[2];
+ s->cr[3] = env->cr[3];
+ s->cr[4] = env->cr[4];
+}
+
+static inline int cpu_write_qemu_note(write_core_dump_function f,
+ CPUArchState *env,
+ void *opaque,
+ int type)
+{
+ QEMUCPUState state;
+ Elf64_Nhdr *note64;
+ Elf32_Nhdr *note32;
+ void *note;
+ char *buf;
+ int descsz, note_size, name_size = 5, note_head_size;
+ const char *name = "QEMU";
+ int ret;
+
+ qemu_get_cpustate(&state, env);
+
+ descsz = sizeof(state);
+ if (type == 0) {
+ note_head_size = sizeof(Elf32_Nhdr);
+ } else {
+ note_head_size = sizeof(Elf64_Nhdr);
+ }
+ note_size = ((note_head_size + 3) / 4 + (name_size + 3) / 4 +
+ (descsz + 3) / 4) * 4;
+ note = g_malloc(note_size);
+
+ memset(note, 0, note_size);
+ if (type == 0) {
+ note32 = note;
+ note32->n_namesz = cpu_to_le32(name_size);
+ note32->n_descsz = cpu_to_le32(descsz);
+ note32->n_type = 0;
+ } else {
+ note64 = note;
+ note64->n_namesz = cpu_to_le32(name_size);
+ note64->n_descsz = cpu_to_le32(descsz);
+ note64->n_type = 0;
+ }
+ buf = note;
+ buf += ((note_head_size + 3) / 4) * 4;
+ memcpy(buf, name, name_size);
+ buf += ((name_size + 3) / 4) * 4;
+ memcpy(buf, &state, sizeof(state));
+
+ ret = f(note, note_size, opaque);
+ g_free(note);
+ if (ret < 0) {
+ return -1;
+ }
+
+ return 0;
+}
+
+int cpu_write_elf64_qemunote(write_core_dump_function f, CPUArchState *env,
+ void *opaque)
+{
+ return cpu_write_qemu_note(f, env, opaque, 1);
+}
+
+int cpu_write_elf32_qemunote(write_core_dump_function f, CPUArchState *env,
+ void *opaque)
+{
+ return cpu_write_qemu_note(f, env, opaque, 0);
+}
--
1.7.1
- [Qemu-devel] [PATCH 00/12 v14] introducing a new, dedicated guest memory dump mechanism, Wen Congyang, 2012/04/23
- [Qemu-devel] [PATCH 01/12 v14] Add API to create memory mapping list, Wen Congyang, 2012/04/23
- [Qemu-devel] [PATCH 02/12 v14] Add API to check whether a physical address is I/O address, Wen Congyang, 2012/04/23
- [Qemu-devel] [PATCH 03/12 v14] implement cpu_get_memory_mapping(), Wen Congyang, 2012/04/23
- [Qemu-devel] [PATCH 04/12 v14] Add API to check whether paging mode is enabled, Wen Congyang, 2012/04/24
- [Qemu-devel] [PATCH 05/12 v14] Add API to get memory mapping, Wen Congyang, 2012/04/24
- [Qemu-devel] [PATCH 06/12 v14] Add API to get memory mapping without do paging, Wen Congyang, 2012/04/24
- [Qemu-devel] [PATCH 07/12 v14] target-i386: Add API to write elf notes to core file, Wen Congyang, 2012/04/24
- [Qemu-devel] [PATCH 08/12 v14] target-i386: Add API to write cpu status to core file,
Wen Congyang <=
- [Qemu-devel] [PATCH 09/12 v14] target-i386: add API to get dump info, Wen Congyang, 2012/04/24
- [Qemu-devel] [PATCH 10/12 v14] target-i386: Add API to get note's size, Wen Congyang, 2012/04/24
- [Qemu-devel] [PATCH 11/12 v14] make gdb_id() generally avialable and rename it to cpu_index(), Wen Congyang, 2012/04/24
- [Qemu-devel] [PATCH 12/12 v14] introduce a new monitor command 'dump-guest-memory' to dump guest's memory, Wen Congyang, 2012/04/24