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author | Richard Henderson <richard.henderson@linaro.org> | 2022-04-29 18:28:35 -0700 |
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committer | Richard Henderson <richard.henderson@linaro.org> | 2022-09-13 17:18:20 +0100 |
commit | d1e23cbaa403b2d816e1cb2acd61105d00c38b9b (patch) | |
tree | abb4b71c73fd17f371487cb26cdbcc3af12f56fe /target | |
parent | 79dfa177ae348bb5ab5f97c0915359b13d6186e2 (diff) | |
download | qemu-d1e23cbaa403b2d816e1cb2acd61105d00c38b9b.zip qemu-d1e23cbaa403b2d816e1cb2acd61105d00c38b9b.tar.gz qemu-d1e23cbaa403b2d816e1cb2acd61105d00c38b9b.tar.bz2 |
target/nios2: Use semihosting/syscalls.h
This separates guest file descriptors from host file descriptors,
and utilizes shared infrastructure for integration with gdbstub.
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Diffstat (limited to 'target')
-rw-r--r-- | target/nios2/nios2-semi.c | 296 |
1 files changed, 50 insertions, 246 deletions
diff --git a/target/nios2/nios2-semi.c b/target/nios2/nios2-semi.c index 55061bb..614fd76 100644 --- a/target/nios2/nios2-semi.c +++ b/target/nios2/nios2-semi.c @@ -24,6 +24,7 @@ #include "qemu/osdep.h" #include "cpu.h" #include "exec/gdbstub.h" +#include "semihosting/syscalls.h" #include "semihosting/softmmu-uaccess.h" #include "qemu/log.h" @@ -42,67 +43,6 @@ #define HOSTED_ISATTY 12 #define HOSTED_SYSTEM 13 -static int translate_openflags(int flags) -{ - int hf; - - if (flags & GDB_O_WRONLY) { - hf = O_WRONLY; - } else if (flags & GDB_O_RDWR) { - hf = O_RDWR; - } else { - hf = O_RDONLY; - } - - if (flags & GDB_O_APPEND) { - hf |= O_APPEND; - } - if (flags & GDB_O_CREAT) { - hf |= O_CREAT; - } - if (flags & GDB_O_TRUNC) { - hf |= O_TRUNC; - } - if (flags & GDB_O_EXCL) { - hf |= O_EXCL; - } - - return hf; -} - -static bool translate_stat(CPUNios2State *env, target_ulong addr, - struct stat *s) -{ - struct gdb_stat *p; - - p = lock_user(VERIFY_WRITE, addr, sizeof(struct gdb_stat), 0); - - if (!p) { - return false; - } - p->gdb_st_dev = cpu_to_be32(s->st_dev); - p->gdb_st_ino = cpu_to_be32(s->st_ino); - p->gdb_st_mode = cpu_to_be32(s->st_mode); - p->gdb_st_nlink = cpu_to_be32(s->st_nlink); - p->gdb_st_uid = cpu_to_be32(s->st_uid); - p->gdb_st_gid = cpu_to_be32(s->st_gid); - p->gdb_st_rdev = cpu_to_be32(s->st_rdev); - p->gdb_st_size = cpu_to_be64(s->st_size); -#ifdef _WIN32 - /* Windows stat is missing some fields. */ - p->gdb_st_blksize = 0; - p->gdb_st_blocks = 0; -#else - p->gdb_st_blksize = cpu_to_be64(s->st_blksize); - p->gdb_st_blocks = cpu_to_be64(s->st_blocks); -#endif - p->gdb_st_atime = cpu_to_be32(s->st_atime); - p->gdb_st_mtime = cpu_to_be32(s->st_mtime); - p->gdb_st_ctime = cpu_to_be32(s->st_ctime); - unlock_user(p, addr, sizeof(struct gdb_stat)); - return true; -} - static void nios2_semi_u32_cb(CPUState *cs, uint64_t ret, int err) { Nios2CPU *cpu = NIOS2_CPU(cs); @@ -142,22 +82,22 @@ static void nios2_semi_u64_cb(CPUState *cs, uint64_t ret, int err) */ #define GET_ARG(n) do { \ if (get_user_ual(arg ## n, args + (n) * 4)) { \ - result = -1; \ - errno = EFAULT; \ goto failed; \ } \ } while (0) +#define GET_ARG64(n) do { \ + if (get_user_ual(arg ## n, args + (n) * 4)) { \ + goto failed64; \ + } \ +} while (0) + void do_nios2_semihosting(CPUNios2State *env) { CPUState *cs = env_cpu(env); int nr; uint32_t args; target_ulong arg0, arg1, arg2, arg3; - void *p; - void *q; - uint32_t len; - uint32_t result; nr = env->regs[R_ARG0]; args = env->regs[R_ARG1]; @@ -165,234 +105,98 @@ void do_nios2_semihosting(CPUNios2State *env) case HOSTED_EXIT: gdb_exit(env->regs[R_ARG0]); exit(env->regs[R_ARG0]); + case HOSTED_OPEN: GET_ARG(0); GET_ARG(1); GET_ARG(2); GET_ARG(3); - if (use_gdb_syscalls()) { - gdb_do_syscall(nios2_semi_u32_cb, "open,%s,%x,%x", arg0, (int)arg1, - arg2, arg3); - return; - } else { - p = lock_user_string(arg0); - if (!p) { - result = -1; - errno = EFAULT; - } else { - result = open(p, translate_openflags(arg2), arg3); - unlock_user(p, arg0, 0); - } - } + semihost_sys_open(cs, nios2_semi_u32_cb, arg0, arg1, arg2, arg3); break; + case HOSTED_CLOSE: - { - /* Ignore attempts to close stdin/out/err. */ - GET_ARG(0); - int fd = arg0; - if (fd > 2) { - if (use_gdb_syscalls()) { - gdb_do_syscall(nios2_semi_u32_cb, "close,%x", arg0); - return; - } else { - result = close(fd); - } - } else { - result = 0; - } - break; - } + GET_ARG(0); + semihost_sys_close(cs, nios2_semi_u32_cb, arg0); + break; + case HOSTED_READ: GET_ARG(0); GET_ARG(1); GET_ARG(2); - len = arg2; - if (use_gdb_syscalls()) { - gdb_do_syscall(nios2_semi_u32_cb, "read,%x,%x,%x", - arg0, arg1, len); - return; - } else { - p = lock_user(VERIFY_WRITE, arg1, len, 0); - if (!p) { - result = -1; - errno = EFAULT; - } else { - result = read(arg0, p, len); - unlock_user(p, arg1, len); - } - } + semihost_sys_read(cs, nios2_semi_u32_cb, arg0, arg1, arg2); break; + case HOSTED_WRITE: GET_ARG(0); GET_ARG(1); GET_ARG(2); - len = arg2; - if (use_gdb_syscalls()) { - gdb_do_syscall(nios2_semi_u32_cb, "write,%x,%x,%x", - arg0, arg1, len); - return; - } else { - p = lock_user(VERIFY_READ, arg1, len, 1); - if (!p) { - result = -1; - errno = EFAULT; - } else { - result = write(arg0, p, len); - unlock_user(p, arg0, 0); - } - } + semihost_sys_write(cs, nios2_semi_u32_cb, arg0, arg1, arg2); break; + case HOSTED_LSEEK: - { - uint64_t off; - GET_ARG(0); - GET_ARG(1); - GET_ARG(2); - GET_ARG(3); - off = (uint32_t)arg2 | ((uint64_t)arg1 << 32); - if (use_gdb_syscalls()) { - gdb_do_syscall(nios2_semi_u64_cb, "lseek,%x,%lx,%x", - arg0, off, arg3); - } else { - off = lseek(arg0, off, arg3); - nios2_semi_u64_cb(cs, off, errno); - } - return; - } + GET_ARG64(0); + GET_ARG64(1); + GET_ARG64(2); + GET_ARG64(3); + semihost_sys_lseek(cs, nios2_semi_u64_cb, arg0, + deposit64(arg2, arg1, 32, 32), arg3); + break; + case HOSTED_RENAME: GET_ARG(0); GET_ARG(1); GET_ARG(2); GET_ARG(3); - if (use_gdb_syscalls()) { - gdb_do_syscall(nios2_semi_u32_cb, "rename,%s,%s", - arg0, (int)arg1, arg2, (int)arg3); - return; - } else { - p = lock_user_string(arg0); - q = lock_user_string(arg2); - if (!p || !q) { - result = -1; - errno = EFAULT; - } else { - result = rename(p, q); - } - unlock_user(p, arg0, 0); - unlock_user(q, arg2, 0); - } + semihost_sys_rename(cs, nios2_semi_u32_cb, arg0, arg1, arg2, arg3); break; + case HOSTED_UNLINK: GET_ARG(0); GET_ARG(1); - if (use_gdb_syscalls()) { - gdb_do_syscall(nios2_semi_u32_cb, "unlink,%s", - arg0, (int)arg1); - return; - } else { - p = lock_user_string(arg0); - if (!p) { - result = -1; - errno = EFAULT; - } else { - result = unlink(p); - unlock_user(p, arg0, 0); - } - } + semihost_sys_remove(cs, nios2_semi_u32_cb, arg0, arg1); break; + case HOSTED_STAT: GET_ARG(0); GET_ARG(1); GET_ARG(2); - if (use_gdb_syscalls()) { - gdb_do_syscall(nios2_semi_u32_cb, "stat,%s,%x", - arg0, (int)arg1, arg2); - return; - } else { - struct stat s; - p = lock_user_string(arg0); - if (!p) { - result = -1; - errno = EFAULT; - } else { - result = stat(p, &s); - unlock_user(p, arg0, 0); - } - if (result == 0 && !translate_stat(env, arg2, &s)) { - result = -1; - errno = EFAULT; - } - } + semihost_sys_stat(cs, nios2_semi_u32_cb, arg0, arg1, arg2); break; + case HOSTED_FSTAT: GET_ARG(0); GET_ARG(1); - if (use_gdb_syscalls()) { - gdb_do_syscall(nios2_semi_u32_cb, "fstat,%x,%x", - arg0, arg1); - return; - } else { - struct stat s; - result = fstat(arg0, &s); - if (result == 0 && !translate_stat(env, arg1, &s)) { - result = -1; - errno = EFAULT; - } - } + semihost_sys_fstat(cs, nios2_semi_u32_cb, arg0, arg1); break; + case HOSTED_GETTIMEOFDAY: - /* Only the tv parameter is used. tz is assumed NULL. */ GET_ARG(0); - if (use_gdb_syscalls()) { - gdb_do_syscall(nios2_semi_u32_cb, "gettimeofday,%x,%x", - arg0, 0); - return; - } else { - struct gdb_timeval *p; - int64_t rt = g_get_real_time(); - p = lock_user(VERIFY_WRITE, arg0, sizeof(struct gdb_timeval), 0); - if (!p) { - result = -1; - errno = EFAULT; - } else { - result = 0; - p->tv_sec = cpu_to_be32(rt / G_USEC_PER_SEC); - p->tv_usec = cpu_to_be64(rt % G_USEC_PER_SEC); - unlock_user(p, arg0, sizeof(struct gdb_timeval)); - } - } + GET_ARG(1); + semihost_sys_gettimeofday(cs, nios2_semi_u32_cb, arg0, arg1); break; + case HOSTED_ISATTY: GET_ARG(0); - if (use_gdb_syscalls()) { - gdb_do_syscall(nios2_semi_u32_cb, "isatty,%x", arg0); - return; - } else { - result = isatty(arg0); - } + semihost_sys_isatty(cs, nios2_semi_u32_cb, arg0); break; + case HOSTED_SYSTEM: GET_ARG(0); GET_ARG(1); - if (use_gdb_syscalls()) { - gdb_do_syscall(nios2_semi_u32_cb, "system,%s", - arg0, (int)arg1); - return; - } else { - p = lock_user_string(arg0); - if (!p) { - result = -1; - errno = EFAULT; - } else { - result = system(p); - unlock_user(p, arg0, 0); - } - } + semihost_sys_system(cs, nios2_semi_u32_cb, arg0, arg1); break; + default: qemu_log_mask(LOG_GUEST_ERROR, "nios2-semihosting: unsupported " "semihosting syscall %d\n", nr); - result = 0; + nios2_semi_u32_cb(cs, -1, ENOSYS); + break; + + failed: + nios2_semi_u32_cb(cs, -1, EFAULT); + break; + failed64: + nios2_semi_u64_cb(cs, -1, EFAULT); + break; } -failed: - nios2_semi_u32_cb(cs, result, errno); } |