From: Cliff Wickman <[email protected]>

If the vmlinux does not have dwarf information makedumpfile fails in
a rather obscure way, with a flood of redundant errors,

Make it fail with more of a hint of what is wrong.

Signed-off-by: Cliff Wickman <[email protected]>
---
 dwarf_info.c |    4 ++++
 1 file changed, 4 insertions(+)

Index: makedumpfile.mmap/dwarf_info.c
===================================================================
--- makedumpfile.mmap.orig/dwarf_info.c
+++ makedumpfile.mmap/dwarf_info.c
@@ -139,6 +139,10 @@ process_module (Dwfl_Module *dwflmod,
 
        /* get a debug context descriptor.*/
        dwarf_info.dwarfd = dwfl_module_getdwarf (dwflmod, &dwbias);
+       if (dwarf_info.dwarfd == NULL) {
+               fprintf(stderr, "makedumpfile: dwfl_module_getdwarf error\n");
+               exit(1);
+       }
        dwarf_info.elfd = dwarf_getelf(dwarf_info.dwarfd);
 
        mod_name = dwfl_module_info(dwflmod, NULL, NULL, NULL, NULL, NULL,

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