From: Ilya Leoshkevich iii@linux.ibm.com
commit e9c9cb90e76ffaabcc7ca8f275d9e82195fd6367 upstream.
When debugging vmlinux with QEMU + GDB, the following GDB error may occur:
(gdb) c Continuing. Warning: Cannot insert breakpoint -1. Cannot access memory at address 0xffffffffffff95c0
Command aborted. (gdb)
The reason is that, when .interp section is present, GDB tries to locate the file specified in it in memory and put a number of breakpoints there (see enable_break() function in gdb/solib-svr4.c). Sometimes GDB finds a bogus location that matches its heuristics, fails to set a breakpoint and stops. This makes further debugging impossible.
The .interp section contains misleading information anyway (vmlinux does not need ld.so), so fix by discarding it.
Signed-off-by: Ilya Leoshkevich iii@linux.ibm.com Cc: stable@vger.kernel.org Signed-off-by: Heiko Carstens hca@linux.ibm.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- arch/s390/kernel/vmlinux.lds.S | 1 + 1 file changed, 1 insertion(+)
--- a/arch/s390/kernel/vmlinux.lds.S +++ b/arch/s390/kernel/vmlinux.lds.S @@ -228,5 +228,6 @@ SECTIONS DISCARDS /DISCARD/ : { *(.eh_frame) + *(.interp) } }