dump: Set correct vaddr for ELF dump

vaddr needs to be equal to the paddr since the dump file represents the
physical memory image.

Without setting vaddr correctly, GDB would load all the different memory
regions on top of each other to vaddr 0, thus making GDB showing the wrong
memory data for a given address.

Signed-off-by: Jon Doron <arilou@gmail.com>
Message-Id: <20190109082203.27142-1-arilou@gmail.com>
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Tested-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Acked-by: Laszlo Ersek <lersek@redhat.com>

diff --git a/dump.c b/dump.c
index ef1d8025c9dc0e2fc155545d3b033ac7304df132..107a67165a645dcd96dfcf64dfd6d398915014b1 100644 (file)
--- a/dump.c
+++ b/dump.c
@@ -192,7 +192,7 @@ static void write_elf64_load(DumpState *s, MemoryMapping *memory_mapping,
     phdr.p_paddr = cpu_to_dump64(s, memory_mapping->phys_addr);
     phdr.p_filesz = cpu_to_dump64(s, filesz);
     phdr.p_memsz = cpu_to_dump64(s, memory_mapping->length);
-    phdr.p_vaddr = cpu_to_dump64(s, memory_mapping->virt_addr);
+    phdr.p_vaddr = cpu_to_dump64(s, memory_mapping->virt_addr) ?: phdr.p_paddr;
 
     assert(memory_mapping->length >= filesz);
 
@@ -216,7 +216,8 @@ static void write_elf32_load(DumpState *s, MemoryMapping *memory_mapping,
     phdr.p_paddr = cpu_to_dump32(s, memory_mapping->phys_addr);
     phdr.p_filesz = cpu_to_dump32(s, filesz);
     phdr.p_memsz = cpu_to_dump32(s, memory_mapping->length);
-    phdr.p_vaddr = cpu_to_dump32(s, memory_mapping->virt_addr);
+    phdr.p_vaddr =
+        cpu_to_dump32(s, memory_mapping->virt_addr) ?: phdr.p_paddr;
 
     assert(memory_mapping->length >= filesz);
 

diff --git a/scripts/dump-guest-memory.py b/scripts/dump-guest-memory.py
index 198cd0fe40f0f177fa71fedeb7cf21d4d0927125..2c587cbefc5702544b78ffea196d9dcdd984085d 100644 (file)
--- a/scripts/dump-guest-memory.py
+++ b/scripts/dump-guest-memory.py
@@ -163,6 +163,7 @@ class ELF(object):
         phdr = get_arch_phdr(self.endianness, self.elfclass)
         phdr.p_type = p_type
         phdr.p_paddr = p_paddr
+        phdr.p_vaddr = p_paddr
         phdr.p_filesz = p_size
         phdr.p_memsz = p_size
         self.segments.append(phdr)