> > > Hello, > > > > I get segementation fault from our 64-bit kernel crash > > This crash is caused by "echo c > /proc/sys-trigger". > > The reason seems to be that the x86_64_cpu_pda_init is > > not called at least gdb do not break there.

Btw, the "struct" command caused another segementation fault. Here is gdb bt: (gdb) bt #0 0x00007f74b3524a92 in strcmp () from /lib/libc.so.6 #1 0x0000000000534284 in lookup_partial_symtab (name=0x120e3c0 "x8664_pda") at symtab.c:276 #2 0x00000000005344ed in lookup_symtab (name=0x120e3c0 "x8664_pda") at symtab.c:228 #3 0x000000000060019d in c_lex () at c-exp.y:2149 #4 0x00000000006008f5 in c_parse_internal () at c-exp.c.tmp:1468 #5 0x00000000006022dd in c_parse () at c-exp.y:2225 #6 0x000000000055f614 in parse_exp_in_context (stringptr=0x7fffbc2f2260, block=<value optimized out>, comma=<value optimized out>, void_context_p=0, out_subexp=0x0) at parse.c:1094 #7 0x000000000055f924 in parse_expression (string=0x7fffbc2f2950 "x8664_pda") at parse.c:1144 #8 0x000000000053291b in gdb_command_funnel (req=0xca2c00) at symtab.c:4992 #9 0x00000000004c1740 in gdb_interface (req=0xca2c00) at gdb_interface.c:407 #10 0x00000000004e9dca in datatype_info (name=0xb618a7 "x8664_pda", member=0x0, dm=0x7fffbc2f3620) at symbols.c:4146 #11 0x00000000004eb1ee in arg_to_datatype (s=0xb618a7 "x8664_pda", dm=0x7fffbc2f3620, flags=524290) at symbols.c:4867 #12 0x00000000004efa1b in cmd_datatype_common (flags=2048) at symbols.c:4664 #13 0x000000000045efd9 in exec_command () at main.c:644 #14 0x000000000045f1fa in main_loop () at main.c:603 #15 0x00000000005452a9 in captured_command_loop (data=0x120e3c0) at ./main.c:226 #16 0x00000000005434e4 in catch_errors (func=0x5452a0 <captured_command_loop>, func_args=0x0, errstring=0x7f9d7c "", mask=<value optimized out>) at exceptions.c:520 #17 0x0000000000544d36 in captured_main (data=<value optimized out>) at ./main.c:924 #18 0x00000000005434e4 in catch_errors (func=0x544340 <captured_main>, func_args=0x7fffbc2f38b0, errstring=0x7f9d7c "", mask=<value optimized out>) at exceptions.c:520 #19 0x000000000054412f in gdb_main_entry (argc=<value optimized out>, argv=<value optimized out>) at ./main.c:939 #20 0x000000000045fece in main (argc=3, argv=0x7fffbc2f3a08) at main.c:517 (gdb) frame 1 #1 0x0000000000534284 in lookup_partial_symtab (name=0x120e3c0 "x8664_pda") at symtab.c:276 276 if (FILENAME_CMP (name, pst->filename) == 0) (gdb) p name $4 = 0x120e3c0 "x8664_pda" (gdb) p pst $5 = (struct partial_symtab *) 0x14d6040 (gdb) p pst->filename $6 = 0x0 (gdb) p *pst $7 = {next = 0x0, filename = 0x0, fullname = 0x0, dirname = 0x0, objfile = 0x0, section_offsets = 0x0, textlow = 0, texthigh = 0, dependencies = 0x0, number_of_dependencies = 0, globals_offset = 0, n_global_syms = 0, statics_offset = 0, n_static_syms = 0, symtab = 0x0, read_symtab = 0, read_symtab_private = 0x0, readin = 0 '\0'} (gdb)