/* this struct defines the way the registers are stored on the   stack during a system call. */struct target_pt_regs {    abi_long uregs[18];};#define ARM_cpsr	uregs[16]#define ARM_pc		uregs[15]#define ARM_lr		uregs[14]#define ARM_sp		uregs[13]#define ARM_ip		uregs[12]#define ARM_fp		uregs[11]#define ARM_r10		uregs[10]#define ARM_r9		uregs[9]#define ARM_r8		uregs[8]#define ARM_r7		uregs[7]#define ARM_r6		uregs[6]#define ARM_r5		uregs[5]#define ARM_r4		uregs[4]#define ARM_r3		uregs[3]#define ARM_r2		uregs[2]#define ARM_r1		uregs[1]#define ARM_r0		uregs[0]#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)#define ARM_NR_semihosting	  0x123456#define ARM_NR_thumb_semihosting  0xAB#if defined(TARGET_WORDS_BIGENDIAN)#define UNAME_MACHINE "armv5teb"#else#define UNAME_MACHINE "armv5tel"#endifuint32_t do_arm_semihosting(CPUState *);