474f819672
When PTRACE_O_TRACEEXEC is used, a ptrace call to fetch the registers at the PTRACE_EVENT_EXEC stop (PTRACE_PEEKUSR) will oops in CHECK_FULL_REGS. With recent versions, "gdb --args /bin/sh -c 'exec /bin/true'" and "run" at the (gdb) prompt is sufficient to produce this. I also have written an isolated test case, see https://bugzilla.redhat.com/show_bug.cgi?id=301791#c15. This change fixes the problem by clearing the low bit of pt_regs.trap in start_thread so that FULL_REGS is true again. This is correct since all of the GPRs that "full" refers to are cleared in start_thread. Signed-off-by: Roland McGrath <roland@redhat.com> Signed-off-by: Paul Mackerras <paulus@samba.org> |
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.. | ||
vdso32 | ||
vdso64 | ||
align.c | ||
asm-offsets.c | ||
audit.c | ||
binfmt_elf32.c | ||
btext.c | ||
compat_audit.c | ||
cpu_setup_6xx.S | ||
cpu_setup_pa6t.S | ||
cpu_setup_ppc970.S | ||
cputable.c | ||
crash_dump.c | ||
crash.c | ||
dma_64.c | ||
entry_32.S | ||
entry_64.S | ||
firmware.c | ||
fpu.S | ||
head_4xx.S | ||
head_8xx.S | ||
head_32.S | ||
head_44x.S | ||
head_64.S | ||
head_booke.h | ||
head_fsl_booke.S | ||
ibmebus.c | ||
idle_6xx.S | ||
idle_power4.S | ||
idle.c | ||
init_task.c | ||
io.c | ||
iomap.c | ||
iommu.c | ||
irq.c | ||
isa-bridge.c | ||
kprobes.c | ||
l2cr_6xx.S | ||
legacy_serial.c | ||
lparcfg.c | ||
lparmap.c | ||
machine_kexec_32.c | ||
machine_kexec_64.c | ||
machine_kexec.c | ||
Makefile | ||
misc_32.S | ||
misc_64.S | ||
misc.S | ||
module_32.c | ||
module_64.c | ||
msi.c | ||
nvram_64.c | ||
of_device.c | ||
of_platform.c | ||
paca.c | ||
pci_32.c | ||
pci_64.c | ||
pci_dn.c | ||
pci-common.c | ||
pmc.c | ||
ppc32.h | ||
ppc_ksyms.c | ||
proc_ppc64.c | ||
process.c | ||
prom_init.c | ||
prom_parse.c | ||
prom.c | ||
ptrace32.c | ||
ptrace.c | ||
rtas_flash.c | ||
rtas_pci.c | ||
rtas-proc.c | ||
rtas-rtc.c | ||
rtas.c | ||
semaphore.c | ||
setup_32.c | ||
setup_64.c | ||
setup-common.c | ||
setup.h | ||
signal_32.c | ||
signal_64.c | ||
signal.c | ||
signal.h | ||
smp-tbsync.c | ||
smp.c | ||
suspend.c | ||
swsusp_32.S | ||
swsusp_64.c | ||
swsusp_asm64.S | ||
swsusp.c | ||
sys_ppc32.c | ||
syscalls.c | ||
sysfs.c | ||
systbl.S | ||
tau_6xx.c | ||
time.c | ||
traps.c | ||
udbg_16550.c | ||
udbg.c | ||
vdso.c | ||
vecemu.c | ||
vector.S | ||
vio.c | ||
vmlinux.lds.S |