2015-06-19 12:08:43 +02:00
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/*
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* Unified Hosting Interface syscalls.
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*
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* Copyright (c) 2015 Imagination Technologies
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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2020-10-16 16:35:09 +02:00
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* version 2.1 of the License, or (at your option) any later version.
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2015-06-19 12:08:43 +02:00
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, see <http://www.gnu.org/licenses/>.
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*/
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2016-01-18 18:35:00 +01:00
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#include "qemu/osdep.h"
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2015-06-19 12:08:43 +02:00
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#include "cpu.h"
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2016-03-15 13:18:37 +01:00
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#include "qemu/log.h"
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2022-06-28 13:16:56 +02:00
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#include "exec/gdbstub.h"
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2022-04-28 05:48:41 +02:00
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#include "semihosting/softmmu-uaccess.h"
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2021-03-05 14:54:49 +01:00
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#include "semihosting/semihost.h"
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#include "semihosting/console.h"
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2022-06-28 13:16:56 +02:00
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#include "semihosting/syscalls.h"
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2022-05-02 09:11:25 +02:00
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#include "internal.h"
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2015-06-19 12:08:43 +02:00
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typedef enum UHIOp {
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UHI_exit = 1,
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UHI_open = 2,
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UHI_close = 3,
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UHI_read = 4,
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UHI_write = 5,
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UHI_lseek = 6,
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UHI_unlink = 7,
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UHI_fstat = 8,
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UHI_argc = 9,
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UHI_argnlen = 10,
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UHI_argn = 11,
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UHI_plog = 13,
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UHI_assert = 14,
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UHI_pread = 19,
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UHI_pwrite = 20,
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UHI_link = 22
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} UHIOp;
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typedef struct UHIStat {
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int16_t uhi_st_dev;
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uint16_t uhi_st_ino;
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uint32_t uhi_st_mode;
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uint16_t uhi_st_nlink;
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uint16_t uhi_st_uid;
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uint16_t uhi_st_gid;
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int16_t uhi_st_rdev;
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uint64_t uhi_st_size;
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uint64_t uhi_st_atime;
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uint64_t uhi_st_spare1;
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uint64_t uhi_st_mtime;
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uint64_t uhi_st_spare2;
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uint64_t uhi_st_ctime;
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uint64_t uhi_st_spare3;
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uint64_t uhi_st_blksize;
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uint64_t uhi_st_blocks;
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uint64_t uhi_st_spare4[2];
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} UHIStat;
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enum UHIOpenFlags {
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UHIOpen_RDONLY = 0x0,
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UHIOpen_WRONLY = 0x1,
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UHIOpen_RDWR = 0x2,
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UHIOpen_APPEND = 0x8,
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UHIOpen_CREAT = 0x200,
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UHIOpen_TRUNC = 0x400,
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UHIOpen_EXCL = 0x800
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};
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2022-05-02 05:03:01 +02:00
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enum UHIErrno {
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UHI_EACCESS = 13,
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UHI_EAGAIN = 11,
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UHI_EBADF = 9,
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UHI_EBADMSG = 77,
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UHI_EBUSY = 16,
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UHI_ECONNRESET = 104,
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UHI_EEXIST = 17,
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UHI_EFBIG = 27,
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UHI_EINTR = 4,
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UHI_EINVAL = 22,
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UHI_EIO = 5,
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UHI_EISDIR = 21,
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UHI_ELOOP = 92,
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UHI_EMFILE = 24,
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UHI_EMLINK = 31,
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UHI_ENAMETOOLONG = 91,
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UHI_ENETDOWN = 115,
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UHI_ENETUNREACH = 114,
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UHI_ENFILE = 23,
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UHI_ENOBUFS = 105,
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UHI_ENOENT = 2,
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UHI_ENOMEM = 12,
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UHI_ENOSPC = 28,
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UHI_ENOSR = 63,
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UHI_ENOTCONN = 128,
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UHI_ENOTDIR = 20,
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UHI_ENXIO = 6,
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UHI_EOVERFLOW = 139,
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UHI_EPERM = 1,
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UHI_EPIPE = 32,
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UHI_ERANGE = 34,
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UHI_EROFS = 30,
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UHI_ESPIPE = 29,
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UHI_ETIMEDOUT = 116,
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UHI_ETXTBSY = 26,
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UHI_EWOULDBLOCK = 11,
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UHI_EXDEV = 18,
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};
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2022-06-28 13:16:54 +02:00
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static void report_fault(CPUMIPSState *env)
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{
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int op = env->active_tc.gpr[25];
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error_report("Fault during UHI operation %d", op);
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abort();
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}
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2022-06-28 13:16:56 +02:00
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static void uhi_cb(CPUState *cs, uint64_t ret, int err)
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2021-07-04 18:00:42 +02:00
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{
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2022-06-28 13:16:56 +02:00
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CPUMIPSState *env = cs->env_ptr;
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2015-06-19 12:08:44 +02:00
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2022-06-28 13:16:56 +02:00
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#define E(N) case E##N: err = UHI_E##N; break
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switch (err) {
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case 0:
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break;
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E(PERM);
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E(NOENT);
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E(INTR);
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E(BADF);
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E(BUSY);
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E(EXIST);
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E(NOTDIR);
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E(ISDIR);
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E(INVAL);
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E(NFILE);
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E(MFILE);
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E(FBIG);
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E(NOSPC);
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E(SPIPE);
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E(ROFS);
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E(NAMETOOLONG);
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default:
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err = UHI_EINVAL;
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break;
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case EFAULT:
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2022-06-28 13:16:54 +02:00
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report_fault(env);
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2015-06-19 12:08:43 +02:00
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}
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2022-06-28 13:16:56 +02:00
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#undef E
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env->active_tc.gpr[2] = ret;
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env->active_tc.gpr[3] = err;
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2015-06-19 12:08:43 +02:00
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}
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2022-06-28 13:16:56 +02:00
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static void uhi_fstat_cb(CPUState *cs, uint64_t ret, int err)
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2015-06-19 12:08:43 +02:00
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{
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2022-06-28 13:16:56 +02:00
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QEMU_BUILD_BUG_ON(sizeof(UHIStat) < sizeof(struct gdb_stat));
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2015-06-19 12:08:43 +02:00
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2022-06-28 13:16:56 +02:00
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if (!err) {
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CPUMIPSState *env = cs->env_ptr;
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target_ulong addr = env->active_tc.gpr[5];
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UHIStat *dst = lock_user(VERIFY_WRITE, addr, sizeof(UHIStat), 1);
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struct gdb_stat s;
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2015-06-19 12:08:43 +02:00
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2022-06-28 13:16:56 +02:00
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if (!dst) {
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report_fault(env);
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}
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2015-06-19 12:08:43 +02:00
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2022-06-28 13:16:56 +02:00
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memcpy(&s, dst, sizeof(struct gdb_stat));
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memset(dst, 0, sizeof(UHIStat));
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2015-06-19 12:08:43 +02:00
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2022-06-28 13:16:56 +02:00
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dst->uhi_st_dev = tswap16(be32_to_cpu(s.gdb_st_dev));
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dst->uhi_st_ino = tswap16(be32_to_cpu(s.gdb_st_ino));
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dst->uhi_st_mode = tswap32(be32_to_cpu(s.gdb_st_mode));
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dst->uhi_st_nlink = tswap16(be32_to_cpu(s.gdb_st_nlink));
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dst->uhi_st_uid = tswap16(be32_to_cpu(s.gdb_st_uid));
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dst->uhi_st_gid = tswap16(be32_to_cpu(s.gdb_st_gid));
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dst->uhi_st_rdev = tswap16(be32_to_cpu(s.gdb_st_rdev));
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dst->uhi_st_size = tswap64(be64_to_cpu(s.gdb_st_size));
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dst->uhi_st_atime = tswap64(be32_to_cpu(s.gdb_st_atime));
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dst->uhi_st_mtime = tswap64(be32_to_cpu(s.gdb_st_mtime));
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dst->uhi_st_ctime = tswap64(be32_to_cpu(s.gdb_st_ctime));
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dst->uhi_st_blksize = tswap64(be64_to_cpu(s.gdb_st_blksize));
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dst->uhi_st_blocks = tswap64(be64_to_cpu(s.gdb_st_blocks));
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2015-06-19 12:08:43 +02:00
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2022-06-28 13:16:56 +02:00
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unlock_user(dst, addr, sizeof(UHIStat));
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2015-06-19 12:08:43 +02:00
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}
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2022-06-28 13:16:56 +02:00
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uhi_cb(cs, ret, err);
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2015-06-19 12:08:43 +02:00
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}
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2022-05-02 09:11:25 +02:00
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void mips_semihosting(CPUMIPSState *env)
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2015-06-19 12:08:43 +02:00
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{
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2022-06-28 13:16:56 +02:00
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CPUState *cs = env_cpu(env);
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2015-06-19 12:08:43 +02:00
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target_ulong *gpr = env->active_tc.gpr;
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const UHIOp op = gpr[25];
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2022-06-28 13:16:58 +02:00
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char *p;
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2015-06-19 12:08:43 +02:00
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switch (op) {
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case UHI_exit:
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2022-06-28 13:16:56 +02:00
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gdb_exit(gpr[4]);
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2015-06-19 12:08:43 +02:00
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exit(gpr[4]);
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2022-06-28 13:16:56 +02:00
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2015-06-19 12:08:43 +02:00
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case UHI_open:
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2022-06-28 13:16:56 +02:00
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{
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2022-06-28 13:17:01 +02:00
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target_ulong fname = gpr[4];
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2022-06-28 13:16:56 +02:00
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int ret = -1;
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2022-06-28 13:17:01 +02:00
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p = lock_user_string(fname);
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if (!p) {
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report_fault(env);
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}
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2022-06-28 13:16:56 +02:00
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if (!strcmp("/dev/stdin", p)) {
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ret = 0;
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} else if (!strcmp("/dev/stdout", p)) {
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ret = 1;
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} else if (!strcmp("/dev/stderr", p)) {
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ret = 2;
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}
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2022-06-28 13:17:01 +02:00
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unlock_user(p, fname, 0);
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2022-06-28 13:16:56 +02:00
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/* FIXME: reusing a guest fd doesn't seem correct. */
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if (ret >= 0) {
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gpr[2] = ret;
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break;
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}
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2022-06-28 13:17:01 +02:00
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semihost_sys_open(cs, uhi_cb, fname, 0, gpr[5], gpr[6]);
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2015-06-19 12:08:43 +02:00
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}
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break;
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2022-06-28 13:16:56 +02:00
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2015-06-19 12:08:43 +02:00
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case UHI_close:
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2022-06-28 13:16:56 +02:00
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semihost_sys_close(cs, uhi_cb, gpr[4]);
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2015-06-19 12:08:43 +02:00
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break;
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case UHI_read:
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2022-06-28 13:16:56 +02:00
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semihost_sys_read(cs, uhi_cb, gpr[4], gpr[5], gpr[6]);
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2015-06-19 12:08:43 +02:00
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break;
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case UHI_write:
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2022-06-28 13:16:56 +02:00
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semihost_sys_write(cs, uhi_cb, gpr[4], gpr[5], gpr[6]);
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2015-06-19 12:08:43 +02:00
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break;
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case UHI_lseek:
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2022-06-28 13:16:56 +02:00
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semihost_sys_lseek(cs, uhi_cb, gpr[4], gpr[5], gpr[6]);
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2015-06-19 12:08:43 +02:00
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break;
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case UHI_unlink:
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2022-06-28 13:16:56 +02:00
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semihost_sys_remove(cs, uhi_cb, gpr[4], 0);
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2015-06-19 12:08:43 +02:00
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break;
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case UHI_fstat:
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2022-06-28 13:16:56 +02:00
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semihost_sys_fstat(cs, uhi_fstat_cb, gpr[4], gpr[5]);
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2015-06-19 12:08:43 +02:00
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break;
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2022-06-28 13:16:56 +02:00
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2015-06-19 12:08:43 +02:00
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case UHI_argc:
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gpr[2] = semihosting_get_argc();
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break;
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case UHI_argnlen:
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2022-06-28 13:17:00 +02:00
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{
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const char *s = semihosting_get_arg(gpr[4]);
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gpr[2] = s ? strlen(s) : -1;
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2015-06-19 12:08:43 +02:00
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}
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break;
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case UHI_argn:
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2022-06-28 13:17:00 +02:00
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{
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const char *s = semihosting_get_arg(gpr[4]);
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target_ulong addr;
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size_t len;
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if (!s) {
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gpr[2] = -1;
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break;
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}
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len = strlen(s) + 1;
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addr = gpr[5];
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p = lock_user(VERIFY_WRITE, addr, len, 0);
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if (!p) {
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report_fault(env);
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}
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memcpy(p, s, len);
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unlock_user(p, addr, len);
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gpr[2] = 0;
|
2015-06-19 12:08:43 +02:00
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}
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break;
|
2022-06-28 13:16:57 +02:00
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|
2015-06-19 12:08:43 +02:00
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case UHI_plog:
|
2022-06-28 13:16:57 +02:00
|
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{
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target_ulong addr = gpr[4];
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|
ssize_t len = target_strlen(addr);
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|
|
GString *str;
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char *pct_d;
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|
if (len < 0) {
|
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report_fault(env);
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|
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}
|
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|
p = lock_user(VERIFY_READ, addr, len, 1);
|
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|
|
if (!p) {
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|
report_fault(env);
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|
}
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|
|
pct_d = strstr(p, "%d");
|
|
|
|
if (!pct_d) {
|
2022-06-28 13:17:01 +02:00
|
|
|
unlock_user(p, addr, 0);
|
2022-06-28 13:16:57 +02:00
|
|
|
semihost_sys_write(cs, uhi_cb, 2, addr, len);
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
|
|
|
str = g_string_new_len(p, pct_d - p);
|
|
|
|
g_string_append_printf(str, "%d%s", (int)gpr[5], pct_d + 2);
|
2022-06-28 13:17:01 +02:00
|
|
|
unlock_user(p, addr, 0);
|
2022-06-28 13:16:57 +02:00
|
|
|
|
|
|
|
/*
|
|
|
|
* When we're using gdb, we need a guest address, so
|
|
|
|
* drop the string onto the stack below the stack pointer.
|
|
|
|
*/
|
|
|
|
if (use_gdb_syscalls()) {
|
|
|
|
addr = gpr[29] - str->len;
|
|
|
|
p = lock_user(VERIFY_WRITE, addr, str->len, 0);
|
2022-07-19 21:17:37 +02:00
|
|
|
if (!p) {
|
|
|
|
report_fault(env);
|
|
|
|
}
|
2022-06-28 13:16:57 +02:00
|
|
|
memcpy(p, str->str, str->len);
|
|
|
|
unlock_user(p, addr, str->len);
|
|
|
|
semihost_sys_write(cs, uhi_cb, 2, addr, str->len);
|
|
|
|
} else {
|
|
|
|
gpr[2] = qemu_semihosting_console_write(str->str, str->len);
|
|
|
|
}
|
|
|
|
g_string_free(str, true);
|
2015-06-19 12:08:43 +02:00
|
|
|
}
|
|
|
|
break;
|
2022-06-28 13:16:57 +02:00
|
|
|
|
2015-06-19 12:08:43 +02:00
|
|
|
case UHI_assert:
|
2022-06-28 13:16:58 +02:00
|
|
|
{
|
|
|
|
const char *msg, *file;
|
|
|
|
|
|
|
|
msg = lock_user_string(gpr[4]);
|
|
|
|
if (!msg) {
|
|
|
|
msg = "<EFAULT>";
|
|
|
|
}
|
|
|
|
file = lock_user_string(gpr[5]);
|
|
|
|
if (!file) {
|
|
|
|
file = "<EFAULT>";
|
|
|
|
}
|
|
|
|
|
|
|
|
error_report("UHI assertion \"%s\": file \"%s\", line %d",
|
|
|
|
msg, file, (int)gpr[6]);
|
|
|
|
abort();
|
|
|
|
}
|
|
|
|
|
2015-06-19 12:08:43 +02:00
|
|
|
default:
|
2022-06-28 13:16:54 +02:00
|
|
|
error_report("Unknown UHI operation %d", op);
|
2015-06-19 12:08:43 +02:00
|
|
|
abort();
|
|
|
|
}
|
|
|
|
return;
|
|
|
|
}
|