diff options
Diffstat (limited to 'ChibiOS_20.3.2/os/sb/host/sbhost.c')
| -rw-r--r-- | ChibiOS_20.3.2/os/sb/host/sbhost.c | 146 |
1 files changed, 146 insertions, 0 deletions
diff --git a/ChibiOS_20.3.2/os/sb/host/sbhost.c b/ChibiOS_20.3.2/os/sb/host/sbhost.c new file mode 100644 index 0000000..177a144 --- /dev/null +++ b/ChibiOS_20.3.2/os/sb/host/sbhost.c @@ -0,0 +1,146 @@ +/*
+ ChibiOS - Copyright (C) 2006..2019 Giovanni Di Sirio.
+
+ This file is part of ChibiOS.
+
+ ChibiOS is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 3 of the License, or
+ (at your option) any later version.
+
+ ChibiOS 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 General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+/**
+ * @file sb/host/sbhost.c
+ * @brief ARM sandbox host code.
+ *
+ * @addtogroup ARM_SANDBOX
+ * @{
+ */
+
+#include "ch.h"
+#include "sb.h"
+
+/*===========================================================================*/
+/* Module local definitions. */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Module exported variables. */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Module local types. */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Module local variables. */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Module local functions. */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Module exported functions. */
+/*===========================================================================*/
+
+bool sb_is_valid_read_range(sb_class_t *sbcp, const void *start, size_t size) {
+ const sb_memory_region_t *rp = &sbcp->config->regions[0];
+
+ do {
+ if (((uint32_t)start >= rp->base) && ((uint32_t)start < rp->end) &&
+ (size <= ((size_t)rp->base - (size_t)start))) {
+ return true;
+ }
+ rp++;
+ } while (rp < &sbcp->config->regions[SB_NUM_REGIONS]);
+
+ return false;
+}
+
+bool sb_is_valid_write_range(sb_class_t *sbcp, void *start, size_t size) {
+ const sb_memory_region_t *rp = &sbcp->config->regions[0];
+
+ do {
+ if (((uint32_t)start >= rp->base) && ((uint32_t)start < rp->end) &&
+ (size <= ((size_t)rp->base - (size_t)start))) {
+ return rp->writeable;
+ }
+ rp++;
+ } while (rp < &sbcp->config->regions[SB_NUM_REGIONS]);
+
+ return false;
+}
+
+/**
+ * @brief Sandbox object initialization.
+ *
+ * @param[out] sbcp pointer to the sandbox object
+ *
+ * @init
+ */
+void sbObjectInit(sb_class_t *sbcp) {
+
+ sbcp->config = NULL;
+ sbcp->tp = NULL;
+#if CH_CFG_USE_MESSAGES == TRUE
+ sbcp->msg_tp = NULL;
+#endif
+#if CH_CFG_USE_EVENTS == TRUE
+ chEvtObjectInit(&sbcp->es);
+#endif
+}
+
+/**
+ * @brief Starts a sandboxed thread.
+ *
+ * @param[in] sbcp pointer to the sandbox object
+ * @return The function returns only if the operation failed.
+ *
+ * @api
+ */
+void sbStart(sb_class_t *sbcp, const sb_config_t *config) {
+ uint32_t pc, psp;
+ const sb_header_t *sbhp;
+
+ /* Header location.*/
+ sbhp = (const sb_header_t *)config->regions[config->code_region].base;
+
+ /* Checking header magic numbers.*/
+ if ((sbhp->hdr_magic1 != SB_MAGIC1) || (sbhp->hdr_magic2 != SB_MAGIC2)) {
+ return;
+ }
+
+ /* Checking header size and alignment.*/
+ if (sbhp->hdr_size != sizeof (sb_header_t)) {
+ return;
+ }
+
+ /* PC initial address, by convention it is immediately after the header.*/
+ pc = (config->regions[config->code_region].base + sizeof (sb_header_t)) | 1U;
+
+ /* PSP initial address.*/
+ psp = config->regions[config->data_region].end;
+
+ /* Additional context information.*/
+ sbcp->config = config;
+ sbcp->tp = chThdGetSelfX();
+ sbcp->tp->ctx.syscall.p = (const void *)sbcp;
+ sbcp->tp->ctx.syscall.psp = __get_PSP();
+
+ /* Jumping to the unprivileged code.*/
+ port_unprivileged_jump(pc, psp);
+
+ /* Must never happen condition.*/
+ chSysHalt("returned");
+}
+
+/** @} */
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