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-rw-r--r--target/xtensa/xtensa-semi.c318
1 files changed, 318 insertions, 0 deletions
diff --git a/target/xtensa/xtensa-semi.c b/target/xtensa/xtensa-semi.c
new file mode 100644
index 0000000000..370e365c65
--- /dev/null
+++ b/target/xtensa/xtensa-semi.c
@@ -0,0 +1,318 @@
+/*
+ * Copyright (c) 2011, Max Filippov, Open Source and Linux Lab.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * * Neither the name of the Open Source and Linux Lab nor the
+ * names of its contributors may be used to endorse or promote products
+ * derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "qemu/osdep.h"
+#include "cpu.h"
+#include "exec/helper-proto.h"
+#include "qemu/log.h"
+
+enum {
+ TARGET_SYS_exit = 1,
+ TARGET_SYS_read = 3,
+ TARGET_SYS_write = 4,
+ TARGET_SYS_open = 5,
+ TARGET_SYS_close = 6,
+ TARGET_SYS_lseek = 19,
+ TARGET_SYS_select_one = 29,
+
+ TARGET_SYS_argc = 1000,
+ TARGET_SYS_argv_sz = 1001,
+ TARGET_SYS_argv = 1002,
+ TARGET_SYS_memset = 1004,
+};
+
+enum {
+ SELECT_ONE_READ = 1,
+ SELECT_ONE_WRITE = 2,
+ SELECT_ONE_EXCEPT = 3,
+};
+
+enum {
+ TARGET_EPERM = 1,
+ TARGET_ENOENT = 2,
+ TARGET_ESRCH = 3,
+ TARGET_EINTR = 4,
+ TARGET_EIO = 5,
+ TARGET_ENXIO = 6,
+ TARGET_E2BIG = 7,
+ TARGET_ENOEXEC = 8,
+ TARGET_EBADF = 9,
+ TARGET_ECHILD = 10,
+ TARGET_EAGAIN = 11,
+ TARGET_ENOMEM = 12,
+ TARGET_EACCES = 13,
+ TARGET_EFAULT = 14,
+ TARGET_ENOTBLK = 15,
+ TARGET_EBUSY = 16,
+ TARGET_EEXIST = 17,
+ TARGET_EXDEV = 18,
+ TARGET_ENODEV = 19,
+ TARGET_ENOTDIR = 20,
+ TARGET_EISDIR = 21,
+ TARGET_EINVAL = 22,
+ TARGET_ENFILE = 23,
+ TARGET_EMFILE = 24,
+ TARGET_ENOTTY = 25,
+ TARGET_ETXTBSY = 26,
+ TARGET_EFBIG = 27,
+ TARGET_ENOSPC = 28,
+ TARGET_ESPIPE = 29,
+ TARGET_EROFS = 30,
+ TARGET_EMLINK = 31,
+ TARGET_EPIPE = 32,
+ TARGET_EDOM = 33,
+ TARGET_ERANGE = 34,
+ TARGET_ENOSYS = 88,
+ TARGET_ELOOP = 92,
+};
+
+static uint32_t errno_h2g(int host_errno)
+{
+ static const uint32_t guest_errno[] = {
+ [EPERM] = TARGET_EPERM,
+ [ENOENT] = TARGET_ENOENT,
+ [ESRCH] = TARGET_ESRCH,
+ [EINTR] = TARGET_EINTR,
+ [EIO] = TARGET_EIO,
+ [ENXIO] = TARGET_ENXIO,
+ [E2BIG] = TARGET_E2BIG,
+ [ENOEXEC] = TARGET_ENOEXEC,
+ [EBADF] = TARGET_EBADF,
+ [ECHILD] = TARGET_ECHILD,
+ [EAGAIN] = TARGET_EAGAIN,
+ [ENOMEM] = TARGET_ENOMEM,
+ [EACCES] = TARGET_EACCES,
+ [EFAULT] = TARGET_EFAULT,
+#ifdef ENOTBLK
+ [ENOTBLK] = TARGET_ENOTBLK,
+#endif
+ [EBUSY] = TARGET_EBUSY,
+ [EEXIST] = TARGET_EEXIST,
+ [EXDEV] = TARGET_EXDEV,
+ [ENODEV] = TARGET_ENODEV,
+ [ENOTDIR] = TARGET_ENOTDIR,
+ [EISDIR] = TARGET_EISDIR,
+ [EINVAL] = TARGET_EINVAL,
+ [ENFILE] = TARGET_ENFILE,
+ [EMFILE] = TARGET_EMFILE,
+ [ENOTTY] = TARGET_ENOTTY,
+#ifdef ETXTBSY
+ [ETXTBSY] = TARGET_ETXTBSY,
+#endif
+ [EFBIG] = TARGET_EFBIG,
+ [ENOSPC] = TARGET_ENOSPC,
+ [ESPIPE] = TARGET_ESPIPE,
+ [EROFS] = TARGET_EROFS,
+ [EMLINK] = TARGET_EMLINK,
+ [EPIPE] = TARGET_EPIPE,
+ [EDOM] = TARGET_EDOM,
+ [ERANGE] = TARGET_ERANGE,
+ [ENOSYS] = TARGET_ENOSYS,
+#ifdef ELOOP
+ [ELOOP] = TARGET_ELOOP,
+#endif
+ };
+
+ if (host_errno == 0) {
+ return 0;
+ } else if (host_errno > 0 && host_errno < ARRAY_SIZE(guest_errno) &&
+ guest_errno[host_errno]) {
+ return guest_errno[host_errno];
+ } else {
+ return TARGET_EINVAL;
+ }
+}
+
+void HELPER(simcall)(CPUXtensaState *env)
+{
+ CPUState *cs = CPU(xtensa_env_get_cpu(env));
+ uint32_t *regs = env->regs;
+
+ switch (regs[2]) {
+ case TARGET_SYS_exit:
+ qemu_log("exit(%d) simcall\n", regs[3]);
+ exit(regs[3]);
+ break;
+
+ case TARGET_SYS_read:
+ case TARGET_SYS_write:
+ {
+ bool is_write = regs[2] == TARGET_SYS_write;
+ uint32_t fd = regs[3];
+ uint32_t vaddr = regs[4];
+ uint32_t len = regs[5];
+
+ while (len > 0) {
+ hwaddr paddr = cpu_get_phys_page_debug(cs, vaddr);
+ uint32_t page_left =
+ TARGET_PAGE_SIZE - (vaddr & (TARGET_PAGE_SIZE - 1));
+ uint32_t io_sz = page_left < len ? page_left : len;
+ hwaddr sz = io_sz;
+ void *buf = cpu_physical_memory_map(paddr, &sz, is_write);
+
+ if (buf) {
+ vaddr += io_sz;
+ len -= io_sz;
+ regs[2] = is_write ?
+ write(fd, buf, io_sz) :
+ read(fd, buf, io_sz);
+ regs[3] = errno_h2g(errno);
+ cpu_physical_memory_unmap(buf, sz, is_write, sz);
+ if (regs[2] == -1) {
+ break;
+ }
+ } else {
+ regs[2] = -1;
+ regs[3] = TARGET_EINVAL;
+ break;
+ }
+ }
+ }
+ break;
+
+ case TARGET_SYS_open:
+ {
+ char name[1024];
+ int rc;
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(name); ++i) {
+ rc = cpu_memory_rw_debug(cs, regs[3] + i,
+ (uint8_t *)name + i, 1, 0);
+ if (rc != 0 || name[i] == 0) {
+ break;
+ }
+ }
+
+ if (rc == 0 && i < ARRAY_SIZE(name)) {
+ regs[2] = open(name, regs[4], regs[5]);
+ regs[3] = errno_h2g(errno);
+ } else {
+ regs[2] = -1;
+ regs[3] = TARGET_EINVAL;
+ }
+ }
+ break;
+
+ case TARGET_SYS_close:
+ if (regs[3] < 3) {
+ regs[2] = regs[3] = 0;
+ } else {
+ regs[2] = close(regs[3]);
+ regs[3] = errno_h2g(errno);
+ }
+ break;
+
+ case TARGET_SYS_lseek:
+ regs[2] = lseek(regs[3], (off_t)(int32_t)regs[4], regs[5]);
+ regs[3] = errno_h2g(errno);
+ break;
+
+ case TARGET_SYS_select_one:
+ {
+ uint32_t fd = regs[3];
+ uint32_t rq = regs[4];
+ uint32_t target_tv = regs[5];
+ uint32_t target_tvv[2];
+
+ struct timeval tv = {0};
+ fd_set fdset;
+
+ FD_ZERO(&fdset);
+ FD_SET(fd, &fdset);
+
+ if (target_tv) {
+ cpu_memory_rw_debug(cs, target_tv,
+ (uint8_t *)target_tvv, sizeof(target_tvv), 0);
+ tv.tv_sec = (int32_t)tswap32(target_tvv[0]);
+ tv.tv_usec = (int32_t)tswap32(target_tvv[1]);
+ }
+ regs[2] = select(fd + 1,
+ rq == SELECT_ONE_READ ? &fdset : NULL,
+ rq == SELECT_ONE_WRITE ? &fdset : NULL,
+ rq == SELECT_ONE_EXCEPT ? &fdset : NULL,
+ target_tv ? &tv : NULL);
+ regs[3] = errno_h2g(errno);
+ }
+ break;
+
+ case TARGET_SYS_argc:
+ regs[2] = 1;
+ regs[3] = 0;
+ break;
+
+ case TARGET_SYS_argv_sz:
+ regs[2] = 128;
+ regs[3] = 0;
+ break;
+
+ case TARGET_SYS_argv:
+ {
+ struct Argv {
+ uint32_t argptr[2];
+ char text[120];
+ } argv = {
+ {0, 0},
+ "test"
+ };
+
+ argv.argptr[0] = tswap32(regs[3] + offsetof(struct Argv, text));
+ cpu_memory_rw_debug(cs,
+ regs[3], (uint8_t *)&argv, sizeof(argv), 1);
+ }
+ break;
+
+ case TARGET_SYS_memset:
+ {
+ uint32_t base = regs[3];
+ uint32_t sz = regs[5];
+
+ while (sz) {
+ hwaddr len = sz;
+ void *buf = cpu_physical_memory_map(base, &len, 1);
+
+ if (buf && len) {
+ memset(buf, regs[4], len);
+ cpu_physical_memory_unmap(buf, len, 1, len);
+ } else {
+ len = 1;
+ }
+ base += len;
+ sz -= len;
+ }
+ regs[2] = regs[3];
+ regs[3] = 0;
+ }
+ break;
+
+ default:
+ qemu_log_mask(LOG_GUEST_ERROR, "%s(%d): not implemented\n", __func__, regs[2]);
+ regs[2] = -1;
+ regs[3] = TARGET_ENOSYS;
+ break;
+ }
+}
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