qemu/linux-user/arm/target_syscall.h

#ifndef ARM_TARGET_SYSCALL_H
#define ARM_TARGET_SYSCALL_H

/* this struct defines the way the registers are stored on the
   stack during a system call. */

/* uregs[0..15] are r0 to r15; uregs[16] is CPSR; uregs[17] is ORIG_r0 */
struct target_pt_regs {
    abi_long uregs[18];
};

#define ARM_SYSCALL_BASE	0x900000
#define ARM_THUMB_SYSCALL	0

#define ARM_NR_BASE	  0xf0000
#define ARM_NR_breakpoint (ARM_NR_BASE + 1)
#define ARM_NR_cacheflush (ARM_NR_BASE + 2)
#define ARM_NR_set_tls	  (ARM_NR_BASE + 5)

#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"
#endif
#define UNAME_MINIMUM_RELEASE "2.6.32"

#define TARGET_CLONE_BACKWARDS

#define TARGET_MINSIGSTKSZ 2048
#define TARGET_MLOCKALL_MCL_CURRENT 1
#define TARGET_MLOCKALL_MCL_FUTURE  2

#endif /* ARM_TARGET_SYSCALL_H */