1 files changed, 63 insertions, 0 deletions
diff --git a/libgloss/mips/uhi/uhi_exception.c b/libgloss/mips/uhi/uhi_exception.c
new file mode 100644
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+++ b/libgloss/mips/uhi/uhi_exception.c
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+/*
+ * Copyright (C) 2014-2018 MIPS Tech, LLC
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the following disclaimer.
+ * 2. 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.
+ * 3. Neither the name of the copyright holder 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 COPYRIGHT HOLDER OR CONTRIBUTORS 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.
+*/
+
+/*
+ * @Synopsis     int __uhi_exception (struct gp_ctx *ctx);
+ *
+ *               Parameters:
+ *                 $4 - GP context
+ *
+ *               Arguments to syscall:
+ *                 $25 - Operation code for __uhi_exception
+ *                 $4 - GP context
+ *
+ *               Return from syscall:
+ *                 $2 - 
+ *
+ * @Description  Handle an unhandled exception
+*/
+
+#include <stdint.h>
+#include <mips/uhi_syscalls.h>
+#include <mips/hal.h>
+
+int32_t _MIPS_HAL_NOMIPS16
+__uhi_exception (struct gpctx *ctx, int32_t abi)
+{
+  register struct gpctx *arg1 asm ("$4") = ctx;
+  register int32_t arg2 asm ("$5") = abi;
+  register int32_t op asm ("$25") = __MIPS_UHI_EXCEPTION;
+  register int32_t ret asm ("$2") = __MIPS_UHI_SYSCALL_NUM;
+
+  __asm__ __volatile__ (" # %0 = __uhi_exception(%1, %2) op=%3\n"
+			SYSCALL (__MIPS_UHI_SYSCALL_NUM)
+			: "+r" (ret)
+			: "r" (arg1), "r" (arg2), "r" (op)
+			: "$3");
+  return ret;
+}