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fcf5ef2ab5
We've currently got 18 architectures in QEMU, and thus 18 target-xxx folders in the root folder of the QEMU source tree. More architectures (e.g. RISC-V, AVR) are likely to be included soon, too, so the main folder of the QEMU sources slowly gets quite overcrowded with the target-xxx folders. To disburden the main folder a little bit, let's move the target-xxx folders into a dedicated target/ folder, so that target-xxx/ simply becomes target/xxx/ instead. Acked-by: Laurent Vivier <laurent@vivier.eu> [m68k part] Acked-by: Bastian Koppelmann <kbastian@mail.uni-paderborn.de> [tricore part] Acked-by: Michael Walle <michael@walle.cc> [lm32 part] Acked-by: Cornelia Huck <cornelia.huck@de.ibm.com> [s390x part] Reviewed-by: Christian Borntraeger <borntraeger@de.ibm.com> [s390x part] Acked-by: Eduardo Habkost <ehabkost@redhat.com> [i386 part] Acked-by: Artyom Tarasenko <atar4qemu@gmail.com> [sparc part] Acked-by: Richard Henderson <rth@twiddle.net> [alpha part] Acked-by: Max Filippov <jcmvbkbc@gmail.com> [xtensa part] Reviewed-by: David Gibson <david@gibson.dropbear.id.au> [ppc part] Acked-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com> [crisµblaze part] Acked-by: Guan Xuetao <gxt@mprc.pku.edu.cn> [unicore32 part] Signed-off-by: Thomas Huth <thuth@redhat.com>
213 lines
5.3 KiB
C
213 lines
5.3 KiB
C
/*
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* Lattice Mico32 semihosting syscall interface
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*
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* Copyright (c) 2014 Michael Walle <michael@walle.cc>
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*
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* Based on target/m68k/m68k-semi.c, which is
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* Copyright (c) 2005-2007 CodeSourcery.
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*
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* This work is licensed under the terms of the GNU GPL, version 2 or later.
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* See the COPYING file in the top-level directory.
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*/
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#include "qemu/osdep.h"
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#include "cpu.h"
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#include "exec/helper-proto.h"
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#include "qemu/log.h"
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#include "exec/softmmu-semi.h"
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enum {
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TARGET_SYS_exit = 1,
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TARGET_SYS_open = 2,
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TARGET_SYS_close = 3,
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TARGET_SYS_read = 4,
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TARGET_SYS_write = 5,
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TARGET_SYS_lseek = 6,
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TARGET_SYS_fstat = 10,
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TARGET_SYS_stat = 15,
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};
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enum {
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NEWLIB_O_RDONLY = 0x0,
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NEWLIB_O_WRONLY = 0x1,
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NEWLIB_O_RDWR = 0x2,
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NEWLIB_O_APPEND = 0x8,
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NEWLIB_O_CREAT = 0x200,
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NEWLIB_O_TRUNC = 0x400,
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NEWLIB_O_EXCL = 0x800,
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};
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static int translate_openflags(int flags)
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{
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int hf;
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if (flags & NEWLIB_O_WRONLY) {
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hf = O_WRONLY;
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} else if (flags & NEWLIB_O_RDWR) {
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hf = O_RDWR;
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} else {
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hf = O_RDONLY;
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}
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if (flags & NEWLIB_O_APPEND) {
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hf |= O_APPEND;
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}
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if (flags & NEWLIB_O_CREAT) {
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hf |= O_CREAT;
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}
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if (flags & NEWLIB_O_TRUNC) {
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hf |= O_TRUNC;
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}
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if (flags & NEWLIB_O_EXCL) {
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hf |= O_EXCL;
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}
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return hf;
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}
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struct newlib_stat {
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int16_t newlib_st_dev; /* device */
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uint16_t newlib_st_ino; /* inode */
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uint16_t newlib_st_mode; /* protection */
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uint16_t newlib_st_nlink; /* number of hard links */
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uint16_t newlib_st_uid; /* user ID of owner */
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uint16_t newlib_st_gid; /* group ID of owner */
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int16_t newlib_st_rdev; /* device type (if inode device) */
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int32_t newlib_st_size; /* total size, in bytes */
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int32_t newlib_st_atime; /* time of last access */
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uint32_t newlib_st_spare1;
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int32_t newlib_st_mtime; /* time of last modification */
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uint32_t newlib_st_spare2;
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int32_t newlib_st_ctime; /* time of last change */
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uint32_t newlib_st_spare3;
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} QEMU_PACKED;
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static int translate_stat(CPULM32State *env, target_ulong addr,
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struct stat *s)
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{
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struct newlib_stat *p;
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p = lock_user(VERIFY_WRITE, addr, sizeof(struct newlib_stat), 0);
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if (!p) {
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return 0;
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}
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p->newlib_st_dev = cpu_to_be16(s->st_dev);
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p->newlib_st_ino = cpu_to_be16(s->st_ino);
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p->newlib_st_mode = cpu_to_be16(s->st_mode);
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p->newlib_st_nlink = cpu_to_be16(s->st_nlink);
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p->newlib_st_uid = cpu_to_be16(s->st_uid);
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p->newlib_st_gid = cpu_to_be16(s->st_gid);
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p->newlib_st_rdev = cpu_to_be16(s->st_rdev);
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p->newlib_st_size = cpu_to_be32(s->st_size);
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p->newlib_st_atime = cpu_to_be32(s->st_atime);
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p->newlib_st_mtime = cpu_to_be32(s->st_mtime);
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p->newlib_st_ctime = cpu_to_be32(s->st_ctime);
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unlock_user(p, addr, sizeof(struct newlib_stat));
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return 1;
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}
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bool lm32_cpu_do_semihosting(CPUState *cs)
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{
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LM32CPU *cpu = LM32_CPU(cs);
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CPULM32State *env = &cpu->env;
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int ret = -1;
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target_ulong nr, arg0, arg1, arg2;
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void *p;
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struct stat s;
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nr = env->regs[R_R8];
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arg0 = env->regs[R_R1];
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arg1 = env->regs[R_R2];
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arg2 = env->regs[R_R3];
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switch (nr) {
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case TARGET_SYS_exit:
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/* void _exit(int rc) */
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exit(arg0);
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case TARGET_SYS_open:
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/* int open(const char *pathname, int flags) */
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p = lock_user_string(arg0);
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if (!p) {
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ret = -1;
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} else {
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ret = open(p, translate_openflags(arg2));
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unlock_user(p, arg0, 0);
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}
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break;
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case TARGET_SYS_read:
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/* ssize_t read(int fd, const void *buf, size_t count) */
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p = lock_user(VERIFY_WRITE, arg1, arg2, 0);
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if (!p) {
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ret = -1;
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} else {
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ret = read(arg0, p, arg2);
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unlock_user(p, arg1, arg2);
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}
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break;
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case TARGET_SYS_write:
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/* ssize_t write(int fd, const void *buf, size_t count) */
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p = lock_user(VERIFY_READ, arg1, arg2, 1);
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if (!p) {
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ret = -1;
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} else {
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ret = write(arg0, p, arg2);
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unlock_user(p, arg1, 0);
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}
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break;
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case TARGET_SYS_close:
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/* int close(int fd) */
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/* don't close stdin/stdout/stderr */
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if (arg0 > 2) {
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ret = close(arg0);
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} else {
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ret = 0;
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}
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break;
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case TARGET_SYS_lseek:
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/* off_t lseek(int fd, off_t offset, int whence */
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ret = lseek(arg0, arg1, arg2);
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break;
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case TARGET_SYS_stat:
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/* int stat(const char *path, struct stat *buf) */
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p = lock_user_string(arg0);
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if (!p) {
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ret = -1;
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} else {
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ret = stat(p, &s);
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unlock_user(p, arg0, 0);
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if (translate_stat(env, arg1, &s) == 0) {
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ret = -1;
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}
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}
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break;
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case TARGET_SYS_fstat:
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/* int stat(int fd, struct stat *buf) */
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ret = fstat(arg0, &s);
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if (ret == 0) {
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if (translate_stat(env, arg1, &s) == 0) {
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ret = -1;
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}
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}
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break;
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default:
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/* unhandled */
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return false;
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}
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env->regs[R_R1] = ret;
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return true;
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}
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