Check phdr for Referencing phdr

Change-Id: I63f07a7506d556de3d4c576fd141a007a34ceb0d

diff --git a/src/crash-stack/crash-stack-arm.c b/src/crash-stack/crash-stack-arm.c
index 4edf54f24478460ad23ed6d6c60552e09bde6757..e1d69048caabd93042bb3fa81588cabacb6be7b9 100644 (file)
--- a/src/crash-stack/crash-stack-arm.c
+++ b/src/crash-stack/crash-stack-arm.c
@@ -75,13 +75,19 @@ Boolean readT (Int32 a, void *v, size_t size)
        {
                // get data from segment
                GElf_Phdr mem;
-               GElf_Phdr *phdr = gelf_getphdr (g_core, segment, &mem);
-               Dwarf_Addr offset_in_segment = a - phdr->p_vaddr;
-               if (offset_in_segment < phdr->p_filesz)
+               GElf_Phdr *phdr;
+               Dwarf_Addr offset_in_segment;
+
+               phdr = gelf_getphdr (g_core, segment, &mem);
+               if (phdr != NULL)
                {
-                       Dwarf_Addr offset_in_file = phdr->p_offset + offset_in_segment;
+                       offset_in_segment = a - phdr->p_vaddr;
+                       if (offset_in_segment < phdr->p_filesz)
+                       {
+                               Dwarf_Addr offset_in_file = phdr->p_offset + offset_in_segment;
 
-                       data = elf_getdata_rawchunk (g_core, offset_in_file, size, ELF_T_BYTE);
+                               data = elf_getdata_rawchunk (g_core, offset_in_file, size, ELF_T_BYTE);
+                       }
                }
        }