diff options
| author | Paul Brook <paul@codesourcery.com> | 2012-03-30 18:02:50 +0100 |
|---|---|---|
| committer | Riku Voipio <riku.voipio@linaro.org> | 2012-04-06 19:25:57 +0300 |
| commit | d8fd2954996255ba6ad610917e7849832d0120b7 (patch) | |
| tree | 8278d793ca64380475ce207fc0baf374ac5f522a /target-arm/helper.c | |
| parent | ef8b0c0474aa7eab5172e866dc37428b41ff2934 (diff) | |
Userspace ARM BE8 support
Add support for ARM BE8 userspace binaries.
i.e. big-endian data and little-endian code.
In principle LE8 mode is also possible, but AFAIK has never actually
been implemented/used.
System emulation doesn't have any useable big-endian board models,
but should in principle work once you fix that.
Dynamic endianness switching requires messing with data accesses,
preferably with TCG cooperation, and is orthogonal to BE8 support.
Signed-off-by: Paul Brook <paul@codesourcery.com>
[PMM: various changes, mostly as per my suggestions in code review:
* rebase
* use EF_ defines rather than hardcoded constants
* make bswap_code a bool for future VMSTATE macro compatibility
* update comment in cpu.h about TB flags bit field usage
* factor out load-code-and-swap into arm_ld*_code functions and
get_user_code* macros
* fix stray trailing space at end of line
* added braces in disas.c to satisfy checkpatch
]
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
Diffstat (limited to 'target-arm/helper.c')
| -rw-r--r-- | target-arm/helper.c | 9 |
1 files changed, 5 insertions, 4 deletions
diff --git a/target-arm/helper.c b/target-arm/helper.c index d974b579dc..28f127baf8 100644 --- a/target-arm/helper.c +++ b/target-arm/helper.c @@ -842,7 +842,7 @@ static void do_interrupt_v7m(CPUARMState *env) case EXCP_BKPT: if (semihosting_enabled) { int nr; - nr = lduw_code(env->regs[15]) & 0xff; + nr = arm_lduw_code(env->regs[15], env->bswap_code) & 0xff; if (nr == 0xab) { env->regs[15] += 2; env->regs[0] = do_arm_semihosting(env); @@ -914,9 +914,10 @@ void do_interrupt(CPUARMState *env) if (semihosting_enabled) { /* Check for semihosting interrupt. */ if (env->thumb) { - mask = lduw_code(env->regs[15] - 2) & 0xff; + mask = arm_lduw_code(env->regs[15] - 2, env->bswap_code) & 0xff; } else { - mask = ldl_code(env->regs[15] - 4) & 0xffffff; + mask = arm_ldl_code(env->regs[15] - 4, env->bswap_code) + & 0xffffff; } /* Only intercept calls from privileged modes, to provide some semblance of security. */ @@ -936,7 +937,7 @@ void do_interrupt(CPUARMState *env) case EXCP_BKPT: /* See if this is a semihosting syscall. */ if (env->thumb && semihosting_enabled) { - mask = lduw_code(env->regs[15]) & 0xff; + mask = arm_lduw_code(env->regs[15], env->bswap_code) & 0xff; if (mask == 0xab && (env->uncached_cpsr & CPSR_M) != ARM_CPU_MODE_USR) { env->regs[15] += 2; |