mirror of
https://github.com/qemu/qemu.git
synced 2025-10-31 12:07:31 +00:00
95059f9c31
Change the semantics to be the last byte of the guest va, rather than the following byte. This avoids some overflow conditions. Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
80 lines
2.2 KiB
C
80 lines
2.2 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 2.1 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 ARM_TARGET_CPU_H
|
|
#define ARM_TARGET_CPU_H
|
|
|
|
static inline unsigned long arm_max_reserved_va(CPUState *cs)
|
|
{
|
|
ARMCPU *cpu = ARM_CPU(cs);
|
|
|
|
if (arm_feature(&cpu->env, ARM_FEATURE_M)) {
|
|
/*
|
|
* There are magic return addresses above 0xfe000000,
|
|
* and in general a lot of M-profile system stuff in
|
|
* the high addresses. Restrict linux-user to the
|
|
* cached write-back RAM in the system map.
|
|
*/
|
|
return 0x7ffffffful;
|
|
} else {
|
|
/*
|
|
* We need to be able to map the commpage.
|
|
* See init_guest_commpage in linux-user/elfload.c.
|
|
*/
|
|
return 0xfffffffful;
|
|
}
|
|
}
|
|
#define MAX_RESERVED_VA arm_max_reserved_va
|
|
|
|
static inline void cpu_clone_regs_child(CPUARMState *env, target_ulong newsp,
|
|
unsigned flags)
|
|
{
|
|
if (newsp) {
|
|
env->regs[13] = newsp;
|
|
}
|
|
env->regs[0] = 0;
|
|
}
|
|
|
|
static inline void cpu_clone_regs_parent(CPUARMState *env, unsigned flags)
|
|
{
|
|
}
|
|
|
|
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];
|
|
}
|
|
}
|
|
|
|
static inline abi_ulong get_sp_from_cpustate(CPUARMState *state)
|
|
{
|
|
return state->regs[13];
|
|
}
|
|
#endif
|