Unverified Commit 47ae93cd authored by Michael Clark's avatar Michael Clark
Browse files

RISC-V Linux User Emulation 



Implementation of linux user emulation for RISC-V.

Reviewed-by: default avatarRichard Henderson <richard.henderson@linaro.org>
Signed-off-by: default avatarSagar Karandikar <sagark@eecs.berkeley.edu>
Signed-off-by: default avatarMichael Clark <mjc@sifive.com>
parent 65c5b75c

linux-user/elfload.c

+22 −0
Original line number Diff line number Diff line
@@ -1295,6 +1295,28 @@ static inline void init_thread(struct target_pt_regs *regs, 


#endif /* TARGET_TILEGX */



#ifdef TARGET_RISCV



#define ELF_START_MMAP 0x80000000

#define ELF_ARCH  EM_RISCV



#ifdef TARGET_RISCV32

#define ELF_CLASS ELFCLASS32

#else

#define ELF_CLASS ELFCLASS64

#endif



static inline void init_thread(struct target_pt_regs *regs,

                               struct image_info *infop)

{

    regs->sepc = infop->entry;

    regs->sp = infop->start_stack;

}



#define ELF_EXEC_PAGESIZE 4096



#endif /* TARGET_RISCV */



#ifdef TARGET_HPPA



#define ELF_START_MMAP  0x80000000

linux-user/main.c

+99 −0
Original line number Diff line number Diff line
@@ -3653,6 +3653,100 @@ void cpu_loop(CPUTLGState *env) 


#endif



#ifdef TARGET_RISCV



void cpu_loop(CPURISCVState *env)

{

    CPUState *cs = CPU(riscv_env_get_cpu(env));

    int trapnr, signum, sigcode;

    target_ulong sigaddr;

    target_ulong ret;



    for (;;) {

        cpu_exec_start(cs);

        trapnr = cpu_exec(cs);

        cpu_exec_end(cs);

        process_queued_cpu_work(cs);



        signum = 0;

        sigcode = 0;

        sigaddr = 0;



        switch (trapnr) {

        case EXCP_INTERRUPT:

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

            break;

        case EXCP_ATOMIC:

            cpu_exec_step_atomic(cs);

            break;

        case RISCV_EXCP_U_ECALL:

            env->pc += 4;

            if (env->gpr[xA7] == TARGET_NR_arch_specific_syscall + 15) {

                /* riscv_flush_icache_syscall is a no-op in QEMU as

                   self-modifying code is automatically detected */

                ret = 0;

            } else {

                ret = do_syscall(env,

                                 env->gpr[xA7],

                                 env->gpr[xA0],

                                 env->gpr[xA1],

                                 env->gpr[xA2],

                                 env->gpr[xA3],

                                 env->gpr[xA4],

                                 env->gpr[xA5],

                                 0, 0);

            }

            if (ret == -TARGET_ERESTARTSYS) {

                env->pc -= 4;

            } else if (ret != -TARGET_QEMU_ESIGRETURN) {

                env->gpr[xA0] = ret;

            }

            if (cs->singlestep_enabled) {

                goto gdbstep;

            }

            break;

        case RISCV_EXCP_ILLEGAL_INST:

            signum = TARGET_SIGILL;

            sigcode = TARGET_ILL_ILLOPC;

            break;

        case RISCV_EXCP_BREAKPOINT:

            signum = TARGET_SIGTRAP;

            sigcode = TARGET_TRAP_BRKPT;

            sigaddr = env->pc;

            break;

        case RISCV_EXCP_INST_PAGE_FAULT:

        case RISCV_EXCP_LOAD_PAGE_FAULT:

        case RISCV_EXCP_STORE_PAGE_FAULT:

            signum = TARGET_SIGSEGV;

            sigcode = TARGET_SEGV_MAPERR;

            break;

        case EXCP_DEBUG:

        gdbstep:

            signum = gdb_handlesig(cs, TARGET_SIGTRAP);

            sigcode = TARGET_TRAP_BRKPT;

            break;

        default:

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

                     trapnr);

            exit(EXIT_FAILURE);

        }



        if (signum) {

            target_siginfo_t info = {

                .si_signo = signum,

                .si_errno = 0,

                .si_code = sigcode,

                ._sifields._sigfault._addr = sigaddr

            };

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

        }



        process_pending_signals(env);

    }

}



#endif /* TARGET_RISCV */



#ifdef TARGET_HPPA



static abi_ulong hppa_lws(CPUHPPAState *env)
@@ -4803,6 +4897,11 @@ int main(int argc, char **argv, char **envp) 
        env->pc = regs->pc;

        cpu_set_sr(env, regs->sr);

    }

#elif defined(TARGET_RISCV)

    {

        env->pc = regs->sepc;

        env->gpr[xSP] = regs->sp;

    }

#elif defined(TARGET_SH4)

    {

        int i;

linux-user/riscv/syscall_nr.h

0 → 100644
+287 −0
Original line number Diff line number Diff line 
/*

 * Syscall numbers from asm-generic, common for most

 * of recently-added arches including RISC-V.

 */



#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

#ifdef TARGET_RISCV32

#define TARGET_NR_fcntl64 25

#else

#define TARGET_NR_fcntl 25

#endif

#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_statfs 43

#define TARGET_NR_fstatfs 44

#define TARGET_NR_truncate 45

#define TARGET_NR_ftruncate 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_lseek 62

#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_sendfile 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_newfstatat 79

#define TARGET_NR_fstat 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

#ifdef TARGET_RISCV32

#define TARGET_NR_mmap2 222

#define TARGET_NR_fadvise64_64 223

#else

#define TARGET_NR_mmap 222

#define TARGET_NR_fadvise64 223

#endif

#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_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_syscalls (TARGET_NR_copy_file_range + 1)

linux-user/riscv/target_cpu.h

0 → 100644
+18 −0
Original line number Diff line number Diff line 
#ifndef TARGET_CPU_H

#define TARGET_CPU_H



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

{

    if (newsp) {

        env->gpr[xSP] = newsp;

    }



    env->gpr[xA0] = 0;

}



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

{

    env->gpr[xTP] = newtls;

}



#endif

linux-user/riscv/target_elf.h

0 → 100644
+14 −0
Original line number Diff line number Diff line 
/*

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

 * it under the terms of the GNU General Public License version 2 as

 * published by the Free Software Foundation, or (at your option) any

 * later version. See the COPYING file in the top-level directory.

 */



#ifndef RISCV_TARGET_ELF_H

#define RISCV_TARGET_ELF_H

static inline const char *cpu_get_model(uint32_t eflags)

{

    return "any";

}

#endif