Peter Maydell a7ec0f98e3 linux-user: Don't allow guest to block SIGSEGV ... Don't allow the linux-user guest to block SIGSEGV -- QEMU needs this signal to detect accesses to pages which it has marked read-only because it has cached translated code from them. We implement this by making the do_sigprocmask() wrapper suppress SIGSEGV when doing the host process signal mask manipulation; instead we store the current state of SIGSEGV in the TaskState struct. If we get a SIGSEGV for the guest when the guest has blocked the signal, we treat it as if the default SEGV handler was in place, as the kernel does for forced SIGSEGV delivery. This patch is based on an idea by Alex Barcelo, but rather than simply lying to the guest about the SIGSEGV state we track it. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reported-by: Alex Barcelo <abarcelo@ac.upc.edu> Signed-off-by: Riku Voipio <riku.voipio@linaro.org>		2014-03-17 11:44:32 +02:00
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aarch64	linux-user: AArch64: define TARGET_CLONE_BACKWARDS	2014-01-08 19:07:20 +00:00
alpha	linux-user: set minimum kernel version to 2.6.32	2014-03-10 13:55:00 +02:00
arm	linux-user: set minimum kernel version to 2.6.32	2014-03-10 13:55:00 +02:00
cris	linux-user: set minimum kernel version to 2.6.32	2014-03-10 13:55:00 +02:00
i386	linux-user: set minimum kernel version to 2.6.32	2014-03-10 13:55:00 +02:00
m68k	cpu: Move opaque field from CPU_COMMON to CPUState	2014-03-13 19:20:47 +01:00
microblaze	linux-user: set minimum kernel version to 2.6.32	2014-03-10 13:55:00 +02:00
mips	linux-user: set minimum kernel version to 2.6.32	2014-03-10 13:55:00 +02:00
mips64	linux-user: set minimum kernel version to 2.6.32	2014-03-10 13:55:00 +02:00
openrisc	linux-user: set minimum kernel version to 2.6.32	2014-03-10 13:55:00 +02:00
ppc	linux-user: set minimum kernel version to 2.6.32	2014-03-10 13:55:00 +02:00
s390x	linux-user: set minimum kernel version to 2.6.32	2014-03-10 13:55:00 +02:00
sh4	linux-user: set minimum kernel version to 2.6.32	2014-03-10 13:55:00 +02:00
sparc	linux-user: set minimum kernel version to 2.6.32	2014-03-10 13:55:00 +02:00
sparc64	linux-user: set minimum kernel version to 2.6.32	2014-03-10 13:55:00 +02:00
unicore32	linux-user: set minimum kernel version to 2.6.32	2014-03-10 13:55:00 +02:00
x86_64	linux-user: set minimum kernel version to 2.6.32	2014-03-10 13:55:00 +02:00
cpu-uname.c	linux-user: Don't treat AArch64 cpu names specially	2013-09-10 19:11:28 +01:00
cpu-uname.h	linux-user: adapt uname machine to emulated CPU	2010-02-06 17:19:43 +01:00
elfload.c	linux-user: Don't reserve space for commpage for AArch64	2014-03-17 11:44:31 +02:00
errno_defs.h	Remove unnecessary trailing newlines	2008-12-13 09:32:43 +00:00
flat.h	Support for 32 bit ABI on 64 bit targets (only enabled Sparc64)	2007-10-14 16:27:31 +00:00
flatload.c	linux-user: Remove regs parameter of load_elf_binary and load_flt_binary	2014-01-10 08:51:37 +02:00
ioctls.h	linux-user: Implement BLKPG ioctl	2014-02-19 12:29:23 +02:00
linux_loop.h	Fix build failure with old kernel headers (loop.h is incompatible with	2008-05-23 16:06:43 +00:00
linuxload.c	cpu: Move opaque field from CPU_COMMON to CPUState	2014-03-13 19:20:47 +01:00
m68k-sim.c	exec: Change cpu_abort() argument to CPUState	2014-03-13 19:52:28 +01:00
main.c	exec: Change cpu_abort() argument to CPUState	2014-03-13 19:52:28 +01:00
Makefile.objs	build: move *-user/ objects to nested Makefile.objs	2012-06-07 07:17:33 +02:00
mmap.c	configure: Make NPTL non-optional	2013-07-22 21:54:52 +03:00
qemu.h	linux-user: Don't allow guest to block SIGSEGV	2014-03-17 11:44:32 +02:00
signal.c	linux-user: Don't allow guest to block SIGSEGV	2014-03-17 11:44:32 +02:00
socket.h	linux-user: improve target_to_host_sock_type conversion	2013-07-05 15:45:40 +03:00
strace.c	linux-user: Don't omit comma for strace of rt_sigaction()	2013-04-05 14:40:54 +02:00
strace.list	[v2] linux-user: implement m68k atomic syscalls	2013-09-24 10:47:07 +03:00
syscall_defs.h	linux-user: implement F_[GS]ETOWN_EX	2014-03-17 11:44:31 +02:00
syscall_types.h	linux-user: Implement BLKPG ioctl	2014-02-19 12:29:23 +02:00
syscall.c	signal: added a wrapper for sigprocmask function	2014-03-17 11:44:32 +02:00
target_flat.h	linux-user/FLAT: allow targets to override FLAT processing	2011-02-09 10:33:54 +02:00
uaccess.c	Fix missing strnlen problems	2009-07-01 18:24:44 +00:00
vm86.c	cpu: Move opaque field from CPU_COMMON to CPUState	2014-03-13 19:20:47 +01:00