Commit a0a839b6 authored by Marek Vasut's avatar Marek Vasut Committed by Richard Henderson
Browse files

nios2: Add usermode binaries emulation 



Add missing bits for qemu-user required for emulating Altera Nios2
userspace binaries.

Signed-off-by: default avatarMarek Vasut <marex@denx.de>
Cc: Chris Wulff <crwulff@gmail.com>
Cc: Jeff Da Silva <jdasilva@altera.com>
Cc: Ley Foon Tan <lftan@altera.com>
Cc: Sandra Loosemore <sandra@codesourcery.com>
Cc: Yves Vandervennet <yvanderv@altera.com>
Reviewed-by: default avatarAlexander Graf <agraf@suse.de>
Message-Id: <20170118220146.489-4-marex@denx.de>
Signed-off-by: default avatarRichard Henderson <rth@twiddle.net>
parent 3f0c3423

include/elf.h

+2 −0
Original line number Diff line number Diff line
@@ -126,6 +126,8 @@ typedef int64_t Elf64_Sxword; 
 */

#define EM_S390_OLD     0xA390



#define EM_ALTERA_NIOS2 113     /* Altera Nios II soft-core processor */



#define EM_MICROBLAZE      189

#define EM_MICROBLAZE_OLD  0xBAAB

linux-user/elfload.c

+57 −0
Original line number Diff line number Diff line
@@ -967,6 +967,63 @@ static void elf_core_copy_regs(target_elf_gregset_t *regs, const CPUMBState *env 


#endif /* TARGET_MICROBLAZE */



#ifdef TARGET_NIOS2



#define ELF_START_MMAP 0x80000000



#define elf_check_arch(x) ((x) == EM_ALTERA_NIOS2)



#define ELF_CLASS   ELFCLASS32

#define ELF_ARCH    EM_ALTERA_NIOS2



static void init_thread(struct target_pt_regs *regs, struct image_info *infop)

{

    regs->ea = infop->entry;

    regs->sp = infop->start_stack;

    regs->estatus = 0x3;

}



#define ELF_EXEC_PAGESIZE        4096



#define USE_ELF_CORE_DUMP

#define ELF_NREG 49

typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG];



/* See linux kernel: arch/mips/kernel/process.c:elf_dump_regs.  */

static void elf_core_copy_regs(target_elf_gregset_t *regs,

                               const CPUNios2State *env)

{

    int i;



    (*regs)[0] = -1;

    for (i = 1; i < 8; i++)    /* r0-r7 */

        (*regs)[i] = tswapreg(env->regs[i + 7]);



    for (i = 8; i < 16; i++)   /* r8-r15 */

        (*regs)[i] = tswapreg(env->regs[i - 8]);



    for (i = 16; i < 24; i++)  /* r16-r23 */

        (*regs)[i] = tswapreg(env->regs[i + 7]);

    (*regs)[24] = -1;    /* R_ET */

    (*regs)[25] = -1;    /* R_BT */

    (*regs)[26] = tswapreg(env->regs[R_GP]);

    (*regs)[27] = tswapreg(env->regs[R_SP]);

    (*regs)[28] = tswapreg(env->regs[R_FP]);

    (*regs)[29] = tswapreg(env->regs[R_EA]);

    (*regs)[30] = -1;    /* R_SSTATUS */

    (*regs)[31] = tswapreg(env->regs[R_RA]);



    (*regs)[32] = tswapreg(env->regs[R_PC]);



    (*regs)[33] = -1; /* R_STATUS */

    (*regs)[34] = tswapreg(env->regs[CR_ESTATUS]);



    for (i = 35; i < 49; i++)    /* ... */

        (*regs)[i] = -1;

}



#endif /* TARGET_NIOS2 */



#ifdef TARGET_OPENRISC



#define ELF_START_MMAP 0x08000000

linux-user/main.c

+138 −2
Original line number Diff line number Diff line
@@ -68,8 +68,11 @@ do { \ 
 * This way we will never overlap with our own libraries or binaries or stack

 * or anything else that QEMU maps.

 */

# ifdef TARGET_MIPS

/* MIPS only supports 31 bits of virtual address space for user space */

# if defined(TARGET_MIPS) || defined(TARGET_NIOS2)

/*

 * MIPS only supports 31 bits of virtual address space for user space.

 * Nios2 also only supports 31 bits.

 */

unsigned long reserved_va = 0x77000000;

# else

unsigned long reserved_va = 0xf7000000;
@@ -2462,6 +2465,109 @@ error: 
}

#endif



#ifdef TARGET_NIOS2



void cpu_loop(CPUNios2State *env)

{

    CPUState *cs = ENV_GET_CPU(env);

    Nios2CPU *cpu = NIOS2_CPU(cs);

    target_siginfo_t info;

    int trapnr, gdbsig, ret;



    for (;;) {

        cpu_exec_start(cs);

        trapnr = cpu_exec(cs);

        cpu_exec_end(cs);

        gdbsig = 0;



        switch (trapnr) {

        case EXCP_INTERRUPT:

            /* just indicate that signals should be handled asap */

            break;

        case EXCP_TRAP:

            if (env->regs[R_AT] == 0) {

                abi_long ret;

                qemu_log_mask(CPU_LOG_INT, "\nSyscall\n");



                ret = do_syscall(env, env->regs[2],

                                 env->regs[4], env->regs[5], env->regs[6],

                                 env->regs[7], env->regs[8], env->regs[9],

                                 0, 0);



                if (env->regs[2] == 0) {    /* FIXME: syscall 0 workaround */

                    ret = 0;

                }



                env->regs[2] = abs(ret);

                /* Return value is 0..4096 */

                env->regs[7] = (ret > 0xfffffffffffff000ULL);

                env->regs[CR_ESTATUS] = env->regs[CR_STATUS];

                env->regs[CR_STATUS] &= ~0x3;

                env->regs[R_EA] = env->regs[R_PC] + 4;

                env->regs[R_PC] += 4;

                break;

            } else {

                qemu_log_mask(CPU_LOG_INT, "\nTrap\n");



                env->regs[CR_ESTATUS] = env->regs[CR_STATUS];

                env->regs[CR_STATUS] &= ~0x3;

                env->regs[R_EA] = env->regs[R_PC] + 4;

                env->regs[R_PC] = cpu->exception_addr;



                gdbsig = TARGET_SIGTRAP;

                break;

            }

        case 0xaa:

            switch (env->regs[R_PC]) {

            /*case 0x1000:*/  /* TODO:__kuser_helper_version */

            case 0x1004:      /* __kuser_cmpxchg */

                start_exclusive();

                if (env->regs[4] & 0x3) {

                    goto kuser_fail;

                }

                ret = get_user_u32(env->regs[2], env->regs[4]);

                if (ret) {

                    end_exclusive();

                    goto kuser_fail;

                }

                env->regs[2] -= env->regs[5];

                if (env->regs[2] == 0) {

                    put_user_u32(env->regs[6], env->regs[4]);

                }

                end_exclusive();

                env->regs[R_PC] = env->regs[R_RA];

                break;

            /*case 0x1040:*/  /* TODO:__kuser_sigtramp */

            default:

                ;

kuser_fail:

                info.si_signo = TARGET_SIGSEGV;

                info.si_errno = 0;

                /* TODO: check env->error_code */

                info.si_code = TARGET_SEGV_MAPERR;

                info._sifields._sigfault._addr = env->regs[R_PC];

                queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info);

            }

            break;

        default:

            EXCP_DUMP(env, "\nqemu: unhandled CPU exception %#x - aborting\n",

                     trapnr);

            gdbsig = TARGET_SIGILL;

            break;

        }

        if (gdbsig) {

            gdb_handlesig(cs, gdbsig);

            if (gdbsig != TARGET_SIGTRAP) {

                exit(EXIT_FAILURE);

            }

        }



        process_pending_signals(env);

    }

}



#endif /* TARGET_NIOS2 */



#ifdef TARGET_OPENRISC



void cpu_loop(CPUOpenRISCState *env)
@@ -4632,6 +4738,36 @@ int main(int argc, char **argv, char **envp) 
            restore_snan_bit_mode(env);

        }

    }

#elif defined(TARGET_NIOS2)

    {

        env->regs[0] = 0;

        env->regs[1] = regs->r1;

        env->regs[2] = regs->r2;

        env->regs[3] = regs->r3;

        env->regs[4] = regs->r4;

        env->regs[5] = regs->r5;

        env->regs[6] = regs->r6;

        env->regs[7] = regs->r7;

        env->regs[8] = regs->r8;

        env->regs[9] = regs->r9;

        env->regs[10] = regs->r10;

        env->regs[11] = regs->r11;

        env->regs[12] = regs->r12;

        env->regs[13] = regs->r13;

        env->regs[14] = regs->r14;

        env->regs[15] = regs->r15;

        /* TODO: unsigned long  orig_r2; */

        env->regs[R_RA] = regs->ra;

        env->regs[R_FP] = regs->fp;

        env->regs[R_SP] = regs->sp;

        env->regs[R_GP] = regs->gp;

        env->regs[CR_ESTATUS] = regs->estatus;

        env->regs[R_EA] = regs->ea;

        /* TODO: unsigned long  orig_r7; */



        /* Emulate eret when starting thread. */

        env->regs[R_PC] = regs->ea;

    }

#elif defined(TARGET_OPENRISC)

    {

        int i;

linux-user/nios2/syscall_nr.h

0 → 100644
+329 −0
Original line number Diff line number Diff line 
#define TARGET_NR_io_setup                  0

#define TARGET_NR_io_destroy                1

#define TARGET_NR_io_submit                 2

#define TARGET_NR_io_cancel                 3

#define TARGET_NR_io_getevents              4

#define TARGET_NR_setxattr                  5

#define TARGET_NR_lsetxattr                 6

#define TARGET_NR_fsetxattr                 7

#define TARGET_NR_getxattr                  8

#define TARGET_NR_lgetxattr                 9

#define TARGET_NR_fgetxattr                 10

#define TARGET_NR_listxattr                 11

#define TARGET_NR_llistxattr                12

#define TARGET_NR_flistxattr                13

#define TARGET_NR_removexattr               14

#define TARGET_NR_lremovexattr              15

#define TARGET_NR_fremovexattr              16

#define TARGET_NR_getcwd                    17

#define TARGET_NR_lookup_dcookie            18

#define TARGET_NR_eventfd2                  19

#define TARGET_NR_epoll_create1             20

#define TARGET_NR_epoll_ctl                 21

#define TARGET_NR_epoll_pwait               22

#define TARGET_NR_dup                       23

#define TARGET_NR_dup3                      24

#define TARGET_NR_fcntl64                   25

#define TARGET_NR_inotify_init1             26

#define TARGET_NR_inotify_add_watch         27

#define TARGET_NR_inotify_rm_watch          28

#define TARGET_NR_ioctl                     29

#define TARGET_NR_ioprio_set                30

#define TARGET_NR_ioprio_get                31

#define TARGET_NR_flock                     32

#define TARGET_NR_mknodat                   33

#define TARGET_NR_mkdirat                   34

#define TARGET_NR_unlinkat                  35

#define TARGET_NR_symlinkat                 36

#define TARGET_NR_linkat                    37

#define TARGET_NR_renameat                  38

#define TARGET_NR_umount2                   39

#define TARGET_NR_mount                     40

#define TARGET_NR_pivot_root                41

#define TARGET_NR_nfsservctl                42

#define TARGET_NR_statfs64                  43

#define TARGET_NR_fstatfs64                 44

#define TARGET_NR_truncate64                45

#define TARGET_NR_ftruncate64               46

#define TARGET_NR_fallocate                 47

#define TARGET_NR_faccessat                 48

#define TARGET_NR_chdir                     49

#define TARGET_NR_fchdir                    50

#define TARGET_NR_chroot                    51

#define TARGET_NR_fchmod                    52

#define TARGET_NR_fchmodat                  53

#define TARGET_NR_fchownat                  54

#define TARGET_NR_fchown                    55

#define TARGET_NR_openat                    56

#define TARGET_NR_close                     57

#define TARGET_NR_vhangup                   58

#define TARGET_NR_pipe2                     59

#define TARGET_NR_quotactl                  60

#define TARGET_NR_getdents64                61

#define TARGET_NR_read                      63

#define TARGET_NR_write                     64

#define TARGET_NR_readv                     65

#define TARGET_NR_writev                    66

#define TARGET_NR_pread64                   67

#define TARGET_NR_pwrite64                  68

#define TARGET_NR_preadv                    69

#define TARGET_NR_pwritev                   70

#define TARGET_NR_sendfile64                71

#define TARGET_NR_pselect6                  72

#define TARGET_NR_ppoll                     73

#define TARGET_NR_signalfd4                 74

#define TARGET_NR_vmsplice                  75

#define TARGET_NR_splice                    76

#define TARGET_NR_tee                       77

#define TARGET_NR_readlinkat                78

#define TARGET_NR_fstatat64                 79

#define TARGET_NR_fstat64                   80

#define TARGET_NR_sync                      81

#define TARGET_NR_fsync                     82

#define TARGET_NR_fdatasync                 83

#define TARGET_NR_sync_file_range           84

#define TARGET_NR_timerfd_create            85

#define TARGET_NR_timerfd_settime           86

#define TARGET_NR_timerfd_gettime           87

#define TARGET_NR_utimensat                 88

#define TARGET_NR_acct                      89

#define TARGET_NR_capget                    90

#define TARGET_NR_capset                    91

#define TARGET_NR_personality               92

#define TARGET_NR_exit                      93

#define TARGET_NR_exit_group                94

#define TARGET_NR_waitid                    95

#define TARGET_NR_set_tid_address           96

#define TARGET_NR_unshare                   97

#define TARGET_NR_futex                     98

#define TARGET_NR_set_robust_list           99

#define TARGET_NR_get_robust_list           100

#define TARGET_NR_nanosleep                 101

#define TARGET_NR_getitimer                 102

#define TARGET_NR_setitimer                 103

#define TARGET_NR_kexec_load                104

#define TARGET_NR_init_module               105

#define TARGET_NR_delete_module             106

#define TARGET_NR_timer_create              107

#define TARGET_NR_timer_gettime             108

#define TARGET_NR_timer_getoverrun          109

#define TARGET_NR_timer_settime             110

#define TARGET_NR_timer_delete              111

#define TARGET_NR_clock_settime             112

#define TARGET_NR_clock_gettime             113

#define TARGET_NR_clock_getres              114

#define TARGET_NR_clock_nanosleep           115

#define TARGET_NR_syslog                    116

#define TARGET_NR_ptrace                    117

#define TARGET_NR_sched_setparam            118

#define TARGET_NR_sched_setscheduler        119

#define TARGET_NR_sched_getscheduler        120

#define TARGET_NR_sched_getparam            121

#define TARGET_NR_sched_setaffinity         122

#define TARGET_NR_sched_getaffinity         123

#define TARGET_NR_sched_yield               124

#define TARGET_NR_sched_get_priority_max    125

#define TARGET_NR_sched_get_priority_min    126

#define TARGET_NR_sched_rr_get_interval     127

#define TARGET_NR_restart_syscall           128

#define TARGET_NR_kill                      129

#define TARGET_NR_tkill                     130

#define TARGET_NR_tgkill                    131

#define TARGET_NR_sigaltstack               132

#define TARGET_NR_rt_sigsuspend             133

#define TARGET_NR_rt_sigaction              134

#define TARGET_NR_rt_sigprocmask            135

#define TARGET_NR_rt_sigpending             136

#define TARGET_NR_rt_sigtimedwait           137

#define TARGET_NR_rt_sigqueueinfo           138

#define TARGET_NR_rt_sigreturn              139

#define TARGET_NR_setpriority               140

#define TARGET_NR_getpriority               141

#define TARGET_NR_reboot                    142

#define TARGET_NR_setregid                  143

#define TARGET_NR_setgid                    144

#define TARGET_NR_setreuid                  145

#define TARGET_NR_setuid                    146

#define TARGET_NR_setresuid                 147

#define TARGET_NR_getresuid                 148

#define TARGET_NR_setresgid                 149

#define TARGET_NR_getresgid                 150

#define TARGET_NR_setfsuid                  151

#define TARGET_NR_setfsgid                  152

#define TARGET_NR_times                     153

#define TARGET_NR_setpgid                   154

#define TARGET_NR_getpgid                   155

#define TARGET_NR_getsid                    156

#define TARGET_NR_setsid                    157

#define TARGET_NR_getgroups                 158

#define TARGET_NR_setgroups                 159

#define TARGET_NR_uname                     160

#define TARGET_NR_sethostname               161

#define TARGET_NR_setdomainname             162

#define TARGET_NR_getrlimit                 163

#define TARGET_NR_setrlimit                 164

#define TARGET_NR_getrusage                 165

#define TARGET_NR_umask                     166

#define TARGET_NR_prctl                     167

#define TARGET_NR_getcpu                    168

#define TARGET_NR_gettimeofday              169

#define TARGET_NR_settimeofday              170

#define TARGET_NR_adjtimex                  171

#define TARGET_NR_getpid                    172

#define TARGET_NR_getppid                   173

#define TARGET_NR_getuid                    174

#define TARGET_NR_geteuid                   175

#define TARGET_NR_getgid                    176

#define TARGET_NR_getegid                   177

#define TARGET_NR_gettid                    178

#define TARGET_NR_sysinfo                   179

#define TARGET_NR_mq_open                   180

#define TARGET_NR_mq_unlink                 181

#define TARGET_NR_mq_timedsend              182

#define TARGET_NR_mq_timedreceive           183

#define TARGET_NR_mq_notify                 184

#define TARGET_NR_mq_getsetattr             185

#define TARGET_NR_msgget                    186

#define TARGET_NR_msgctl                    187

#define TARGET_NR_msgrcv                    188

#define TARGET_NR_msgsnd                    189

#define TARGET_NR_semget                    190

#define TARGET_NR_semctl                    191

#define TARGET_NR_semtimedop                192

#define TARGET_NR_semop                     193

#define TARGET_NR_shmget                    194

#define TARGET_NR_shmctl                    195

#define TARGET_NR_shmat                     196

#define TARGET_NR_shmdt                     197

#define TARGET_NR_socket                    198

#define TARGET_NR_socketpair                199

#define TARGET_NR_bind                      200

#define TARGET_NR_listen                    201

#define TARGET_NR_accept                    202

#define TARGET_NR_connect                   203

#define TARGET_NR_getsockname               204

#define TARGET_NR_getpeername               205

#define TARGET_NR_sendto                    206

#define TARGET_NR_recvfrom                  207

#define TARGET_NR_setsockopt                208

#define TARGET_NR_getsockopt                209

#define TARGET_NR_shutdown                  210

#define TARGET_NR_sendmsg                   211

#define TARGET_NR_recvmsg                   212

#define TARGET_NR_readahead                 213

#define TARGET_NR_brk                       214

#define TARGET_NR_munmap                    215

#define TARGET_NR_mremap                    216

#define TARGET_NR_add_key                   217

#define TARGET_NR_request_key               218

#define TARGET_NR_keyctl                    219

#define TARGET_NR_clone                     220

#define TARGET_NR_execve                    221

#define TARGET_NR_mmap2                     222

#define TARGET_NR_fadvise64_64              223

#define TARGET_NR_swapon                    224

#define TARGET_NR_swapoff                   225

#define TARGET_NR_mprotect                  226

#define TARGET_NR_msync                     227

#define TARGET_NR_mlock                     228

#define TARGET_NR_munlock                   229

#define TARGET_NR_mlockall                  230

#define TARGET_NR_munlockall                231

#define TARGET_NR_mincore                   232

#define TARGET_NR_madvise                   233

#define TARGET_NR_remap_file_pages          234

#define TARGET_NR_mbind                     235

#define TARGET_NR_get_mempolicy             236

#define TARGET_NR_set_mempolicy             237

#define TARGET_NR_migrate_pages             238

#define TARGET_NR_move_pages                239

#define TARGET_NR_rt_tgsigqueueinfo         240

#define TARGET_NR_perf_event_open           241

#define TARGET_NR_accept4                   242

#define TARGET_NR_recvmmsg                  243

#define TARGET_NR_cacheflush                244

#define TARGET_NR_arch_specific_syscall     244

#define TARGET_NR_wait4                     260

#define TARGET_NR_prlimit64                 261

#define TARGET_NR_fanotify_init             262

#define TARGET_NR_fanotify_mark             263

#define TARGET_NR_name_to_handle_at         264

#define TARGET_NR_open_by_handle_at         265

#define TARGET_NR_clock_adjtime             266

#define TARGET_NR_syncfs                    267

#define TARGET_NR_setns                     268

#define TARGET_NR_sendmmsg                  269

#define TARGET_NR_process_vm_readv          270

#define TARGET_NR_process_vm_writev         271

#define TARGET_NR_kcmp                      272

#define TARGET_NR_finit_module              273

#define TARGET_NR_sched_setattr             274

#define TARGET_NR_sched_getattr             275

#define TARGET_NR_renameat2                 276

#define TARGET_NR_seccomp                   277

#define TARGET_NR_getrandom                 278

#define TARGET_NR_memfd_create              279

#define TARGET_NR_bpf                       280

#define TARGET_NR_execveat                  281

#define TARGET_NR_userfaultfd               282

#define TARGET_NR_membarrier                283

#define TARGET_NR_mlock2                    284

#define TARGET_NR_copy_file_range           285

#define TARGET_NR_preadv2                   286

#define TARGET_NR_pwritev2                  287

#define TARGET_NR_open                      1024

#define TARGET_NR_link                      1025

#define TARGET_NR_unlink                    1026

#define TARGET_NR_mknod                     1027

#define TARGET_NR_chmod                     1028

#define TARGET_NR_chown                     1029

#define TARGET_NR_mkdir                     1030

#define TARGET_NR_rmdir                     1031

#define TARGET_NR_lchown                    1032

#define TARGET_NR_access                    1033

#define TARGET_NR_rename                    1034

#define TARGET_NR_readlink                  1035

#define TARGET_NR_symlink                   1036

#define TARGET_NR_utimes                    1037

#define TARGET_NR_3264_stat                 1038

#define TARGET_NR_3264_lstat                1039

#define TARGET_NR_pipe                      1040

#define TARGET_NR_dup2                      1041

#define TARGET_NR_epoll_create              1042

#define TARGET_NR_inotify_init              1043

#define TARGET_NR_eventfd                   1044

#define TARGET_NR_signalfd                  1045

#define TARGET_NR_sendfile                  1046

#define TARGET_NR_ftruncate                 1047

#define TARGET_NR_truncate                  1048

#define TARGET_NR_stat                      1049

#define TARGET_NR_lstat                     1050

#define TARGET_NR_fstat                     1051

#define TARGET_NR_fcntl                     1052

#define TARGET_NR_fadvise64                 1053

#define TARGET_NR_newfstatat                1054

#define TARGET_NR_fstatfs                   1055

#define TARGET_NR_statfs                    1056

#define TARGET_NR_lseek                     1057

#define TARGET_NR_mmap                      1058

#define TARGET_NR_alarm                     1059

#define TARGET_NR_getpgrp                   1060

#define TARGET_NR_pause                     1061

#define TARGET_NR_time                      1062

#define TARGET_NR_utime                     1063

#define TARGET_NR_creat                     1064

#define TARGET_NR_getdents                  1065

#define TARGET_NR_futimesat                 1066

#define TARGET_NR_select                    1067

#define TARGET_NR_poll                      1068

#define TARGET_NR_epoll_wait                1069

#define TARGET_NR_ustat                     1070

#define TARGET_NR_vfork                     1071

#define TARGET_NR_oldwait4                  1072

#define TARGET_NR_recv                      1073

#define TARGET_NR_send                      1074

#define TARGET_NR_bdflush                   1075

#define TARGET_NR_umount                    1076

#define TARGET_NR_uselib                    1077

#define TARGET_NR__sysctl                   1078

#define TARGET_NR_fork                      1079

linux-user/nios2/target_cpu.h

0 → 100644
+39 −0
Original line number Diff line number Diff line 
/*

 * Nios2 specific CPU ABI and functions for linux-user

 *

 * Copyright (c) 2016 Marek Vasut <marex@denx.de>

 *

 * This library is free software; you can redistribute it and/or

 * modify it under the terms of the GNU Lesser General Public

 * License as published by the Free Software Foundation; either

 * version 2 of the License, or (at your option) any later version.

 *

 * This library is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

 * Lesser General Public License for more details.

 *

 * You should have received a copy of the GNU Lesser General Public

 * License along with this library; if not, see <http://www.gnu.org/licenses/>.

 */



#ifndef TARGET_CPU_H

#define TARGET_CPU_H



static inline void cpu_clone_regs(CPUNios2State *env, target_ulong newsp)

{

    if (newsp) {

        env->regs[R_SP] = newsp;

    }

    env->regs[R_RET0] = 0;

}



static inline void cpu_set_tls(CPUNios2State *env, target_ulong newtls)

{

    /*

     * Linux kernel 3.10 does not pay any attention to CLONE_SETTLS

     * in copy_thread(), so QEMU need not do so either.

     */

}



#endif