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linux-user: ARM: Ignore immediate value for svc in thumb mode

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When running in thumb mode, Linux doesn't evaluate the immediate value
of the svc instruction, but instead just always assumes the syscall number
to be in r7.

This fixes executing go_bootstrap while building go for me.

Signed-off-by: Alexander Graf <agraf@suse.de>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Alexander Graf 2012-05-29 05:30:26 +00:00 committed by Peter Maydell
parent 806d102141
commit 3a1363acf9
1 changed files with 1 additions and 2 deletions
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3
linux-user/main.c
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@ -822,8 +822,7 @@ void cpu_loop(CPUARMState *env)
} else if (n == ARM_NR_semihosting
|| n == ARM_NR_thumb_semihosting) {
env->regs[0] = do_arm_semihosting (env);
} else if (n == 0 || n >= ARM_SYSCALL_BASE
|| (env->thumb && n == ARM_THUMB_SYSCALL)) {
} else if (n == 0 || n >= ARM_SYSCALL_BASE || env->thumb) {
/* linux syscall */
if (env->thumb || n == 0) {
n = env->regs[7];