qemu/linux-user/arm/target_cpu.h
Mikhail Ilyin b8d43285a4 linux-user: Access correct register for get/set_tls syscalls on ARM TZ CPUs
When support was added for TrustZone to ARM CPU emulation, we failed
to correctly update the support for the linux-user implementation of
the get/set_tls syscalls. This meant that accesses to the TPIDRURO
register via the syscalls were always using the non-secure copy of
the register even if native MRC/MCR accesses were using the secure
register. This inconsistency caused most binaries to segfault on startup
if the CPU type was explicitly set to one of the TZ-enabled ones like
cortex-a15. (The default "any" CPU doesn't have TZ enabled and so is
not affected.)

Use access_secure_reg() to determine whether we should be using
the secure or the nonsecure copy of TPIDRURO when emulating these
syscalls.

Signed-off-by: Mikhail Ilyin <m.ilin@samsung.com>
Message-id: 1426505198-2411-1-git-send-email-m.ilin@samsung.com
[PMM: rewrote commit message to more clearly explain the issue
 and its consequences.]
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2015-03-16 12:30:47 +00:00

49 lines
1.3 KiB
C

/*
* ARM specific CPU ABI and functions for linux-user
*
* Copyright (c) 2003 Fabrice Bellard
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, see <http://www.gnu.org/licenses/>.
*/
#ifndef TARGET_CPU_H
#define TARGET_CPU_H
static inline void cpu_clone_regs(CPUARMState *env, target_ulong newsp)
{
if (newsp) {
env->regs[13] = newsp;
}
env->regs[0] = 0;
}
static inline void cpu_set_tls(CPUARMState *env, target_ulong newtls)
{
if (access_secure_reg(env)) {
env->cp15.tpidruro_s = newtls;
} else {
env->cp15.tpidrro_el[0] = newtls;
}
}
static inline target_ulong cpu_get_tls(CPUARMState *env)
{
if (access_secure_reg(env)) {
return env->cp15.tpidruro_s;
} else {
return env->cp15.tpidrro_el[0];
}
}
#endif