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https://github.com/followmsi/android_kernel_google_msm.git
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db1c9dfa64
die_if_no_fixup() shouldn't use get_user() as it doesn't call set_fs() to indicate that it wants to probe a kernel address. Instead it should use probe_kernel_read(). This fixes the problem of gdb seeing SIGILL rather than SIGTRAP when hitting the KGDB special breakpoint upon SysRq+g being seen. The problem was that die_if_no_fixup() was failing to read the opcode of the instruction that caused the exception, and thus not fixing up the exception. This caused gdb to get a S04 response to the $? request in its remote protocol rather than S05 - which would then cause it to continue with $C04 rather than $c in an attempt to pass the signal onto the inferior process. The kernel, however, does not support $Cnn, and so objects by returning an E22 response, indicating an error. gdb does not expect this and prints: warning: Remote failure reply: E22 and then returns to the gdb command prompt unable to continue. Signed-off-by: David Howells <dhowells@redhat.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> |
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| .. | ||
| asm-offsets.c | ||
| cevt-mn10300.c | ||
| csrc-mn10300.c | ||
| entry.S | ||
| fpu-low.S | ||
| fpu-nofpu-low.S | ||
| fpu-nofpu.c | ||
| fpu.c | ||
| gdb-io-serial-low.S | ||
| gdb-io-serial.c | ||
| gdb-io-ttysm-low.S | ||
| gdb-io-ttysm.c | ||
| gdb-low.S | ||
| gdb-stub.c | ||
| head.S | ||
| init_task.c | ||
| internal.h | ||
| io.c | ||
| irq.c | ||
| kernel_execve.S | ||
| kgdb.c | ||
| kprobes.c | ||
| kthread.S | ||
| Makefile | ||
| mn10300-debug.c | ||
| mn10300-serial-low.S | ||
| mn10300-serial.c | ||
| mn10300-serial.h | ||
| mn10300-watchdog-low.S | ||
| mn10300-watchdog.c | ||
| mn10300_ksyms.c | ||
| module.c | ||
| process.c | ||
| profile-low.S | ||
| profile.c | ||
| ptrace.c | ||
| rtc.c | ||
| setup.c | ||
| sigframe.h | ||
| signal.c | ||
| smp-low.S | ||
| smp.c | ||
| switch_to.S | ||
| sys_mn10300.c | ||
| time.c | ||
| traps.c | ||
| vmlinux.lds.S | ||