Crash needs extra memory mapping to determine phys_base.
Signed-off-by: Wen Congyang <we...@cn.fujitsu.com>
---
cpu-all.h | 2 ++
target-i386/arch-dump.c | 43 +++++++++++++++++++++++++++++++++++++++++++
2 files changed, 45 insertions(+), 0 deletions(-)
diff --git a/cpu-all.h b/cpu-all.h
index efb5ba3..290c43a 100644
--- a/cpu-all.h
+++ b/cpu-all.h
@@ -530,10 +530,12 @@ int cpu_write_elf64_note(int fd, CPUState *env, int cpuid,
target_phys_addr_t *offset);
int cpu_write_elf32_note(int fd, CPUState *env, int cpuid,
target_phys_addr_t *offset);
+int cpu_add_extra_memory_mapping(MemoryMappingList *list);
#else
#define cpu_get_memory_mapping(list, env)
#define cpu_write_elf64_note(fd, env, cpuid, offset) ({ -1; })
#define cpu_write_elf32_note(fd, env, cpuid, offset) ({ -1; })
+#define cpu_add_extra_memory_mapping(list) ({ 0; })
#endif
#endif /* CPU_ALL_H */
diff --git a/target-i386/arch-dump.c b/target-i386/arch-dump.c
index 4c0ff77..d96f6ae 100644
--- a/target-i386/arch-dump.c
+++ b/target-i386/arch-dump.c
@@ -495,3 +495,46 @@ int cpu_write_elf32_note(int fd, CPUState *env, int cpuid,
{
return x86_write_elf32_note(fd, env, cpuid, offset);
}
+
+/* This function is copied from crash */
+static target_ulong get_phys_base_addr(CPUState *env, target_ulong *base_vaddr)
+{
+ int i;
+ target_ulong kernel_base = -1;
+ target_ulong last, mask;
+
+ for (i = 30, last = -1; (kernel_base == -1) && (i >= 20); i--) {
+ mask = ~((1LL << i) - 1);
+ *base_vaddr = env->idt.base & mask;
+ if (*base_vaddr == last) {
+ continue;
+ }
+
+ kernel_base = cpu_get_phys_page_debug(env, *base_vaddr);
+ last = *base_vaddr;
+ }
+
+ return kernel_base;
+}
+
+int cpu_add_extra_memory_mapping(MemoryMappingList *list)
+{
+#ifdef TARGET_X86_64
+ target_phys_addr_t kernel_base = -1;
+ target_ulong base_vaddr;
+ bool lma = !!(first_cpu->hflags & HF_LMA_MASK);
+
+ if (!lma) {
+ return 0;
+ }
+
+ kernel_base = get_phys_base_addr(first_cpu, &base_vaddr);
+ if (kernel_base == -1) {
+ return -1;
+ }
+
+ create_new_memory_mapping_head(list, kernel_base, base_vaddr,
+ TARGET_PAGE_SIZE);
+#endif
+ return 0;
+}
--
1.7.1
