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ARM Thumb syscalls (Paul Brook) 

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@1415 c046a42c-6fe2-441c-8c8c-71466251a162
This commit is contained in:
bellard 2005-04-27 20:11:21 +00:00
parent b48a8bb6b1
commit 192c7bd927
2 changed files with 16 additions and 4 deletions
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1
linux-user/arm/syscall.h
View File

@ -26,6 +26,7 @@ struct target_pt_regs {
#define ARM_ORIG_r0 uregs[17]
#define ARM_SYSCALL_BASE 0x900000
#define ARM_THUMB_SYSCALL 0
#define ARM_NR_cacheflush (ARM_SYSCALL_BASE + 0xf0000 + 2)

19
linux-user/main.c
View File

@ -359,16 +359,27 @@ void cpu_loop(CPUARMState *env)
case EXCP_SWI:
{
/* system call */
insn = ldl((void *)(env->regs[15] - 4));
n = insn & 0xffffff;
if (env->thumb) {
insn = lduw((void *)(env->regs[15] - 2));
n = insn & 0xff;
} else {
insn = ldl((void *)(env->regs[15] - 4));
n = insn & 0xffffff;
}
if (n == ARM_NR_cacheflush) {
arm_cache_flush(env->regs[0], env->regs[1]);
} else if (n == ARM_NR_semihosting
|| n == ARM_NR_thumb_semihosting) {
env->regs[0] = do_arm_semihosting (env);
} else if (n >= ARM_SYSCALL_BASE) {
} else if (n >= ARM_SYSCALL_BASE
|| (env->thumb && n == ARM_THUMB_SYSCALL)) {
/* linux syscall */
n -= ARM_SYSCALL_BASE;
if (env->thumb) {
n = env->regs[7];
} else {
n -= ARM_SYSCALL_BASE;
}
env->regs[0] = do_syscall(env,
n,
env->regs[0],