With 6.8.50.20090106-cvs:
$ gdb vmlinux
(gdb) list sys_execve
No line number known for sys_execve.
(gdb) maintenance info symtabs
{ objfile /usr/local/src/openssi-future-build/linux-ssi/vmlinux
((struct objfile *) 0x845d050)
{ symtab init/main.c ((struct symtab *) 0x8906a48)
dirname /usr/local/src/openssi-future-build/linux-ssi
fullname (null)
blockvector ((struct blockvector *) 0x89049b8) (primary)
linetable ((struct linetable *) 0x88c6b58)
debugformat DWARF 2
}
... lots of stuff omitted
{ symtab arch/i386/kernel/process.c ((struct symtab *) 0x88640c8)
dirname /usr/local/src/openssi-future-build/linux-ssi
fullname (null)
blockvector ((struct blockvector *) 0x88a016c) (primary)
linetable ((struct linetable *) 0x885bcd8)
debugformat DWARF 2
}
...
{ symtab include/asm/thread_info.h ((struct symtab *) 0x8818408)
dirname /usr/local/src/openssi-future-build/linux-ssi
fullname (null)
blockvector ((struct blockvector *) 0x88a016c)
linetable ((struct linetable *) 0x8863d8c)
debugformat unknown
}
}
Trying the same thing with 6.8 I get:
(gdb) list sys_execve
781
782 /*
783 * sys_execve() executes a new program.
784 */
785 asmlinkage int sys_execve(struct pt_regs regs)
786 {
787 int error;
788 char * filename;
789
790 filename = getname((char __user *) regs.ebx);
(gdb) maintenance info symtabs
{ objfile /usr/local/src/openssi-future-build/linux-ssi/vmlinux
((struct objfile *) 0x8377530)
{ symtab arch/i386/kernel/process.c ((struct symtab *) 0x87440f4)
dirname /usr/local/src/openssi-future-build/linux-ssi
fullname
/usr/local/src/openssi-future-build/linux-ssi/arch/i386/kernel/process.c
blockvector ((struct blockvector *) 0x8798d58) (primary)
linetable ((struct linetable *) 0x874c8e0)
debugformat DWARF 2
}
...
{ symtab include/asm/thread_info.h ((struct symtab *) 0x874108c)
dirname /usr/local/src/openssi-future-build/linux-ssi
fullname (null)
blockvector ((struct blockvector *) 0x8798d58)
linetable ((struct linetable *) 0x8743db8)
debugformat unknown
}
}
It looks like 6.8.50 is loading the symtab for init/main.c
"automatically" and somehow refusing to look at other stuff on the list.
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