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+
+/* Chrysalide - Outil d'analyse de fichiers binaires
+ * ##FILE## - traduction d'instructions ARMv7
+ *
+ * Copyright (C) 2017 Cyrille Bagard
+ *
+ * This file is part of Chrysalide.
+ *
+ * Chrysalide 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.
+ *
+ * Chrysalide 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 Chrysalide. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+
+@title ERET
+
+@id 354
+
+@desc {
+
+ When executed in Hyp mode, Exception Return loads the PC from ELR_hyp and loads the CPSR from SPSR_hyp. When executed in a Secure or Non-secure PL1 mode, ERET behaves as: MOVS PC, • LR in the ARM instruction set, see SUBS PC, LR and related instructions (ARM) on page B9-2010 • the equivalent SUBS PC, LR, #0 in the Thumb instruction set, see SUBS PC, LR (Thumb) on page B9-2008. ERET is UNPREDICTABLE: • in the cases described in Restrictions on exception return instructions on page B9-1970 • if it is executed in Debug state. Note In an implementation that includes the Virtualization Extensions: • LR, #0 in the Thumb The T1 encoding of ERET is not a new encoding but, is the preferred synonym of SUBS PC, instruction set. See SUBS PC, LR (Thumb) on page B9-2008 for more information. • Because ERET is the preferred encoding, when decoding Thumb instructions, a disassembler will report an ERET where the original assembler code used SUBS PC, LR, #0.
+
+}
+
+@encoding (T1) {
+
+ @word 1 1 1 1 0 0 1 1 1 1 0 1 1 1 1 0 1 0 0 0 1 1 1 1 0 0 0 0 0 0 0 0
+
+ @syntax {
+
+ @subid 1996
+
+ @asm eret
+
+ }
+
+}
+
+@encoding (A1) {
+
+ @word cond(4) 0 0 0 1 0 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 0 1 1 1 0
+
+ @syntax {
+
+ @subid 1997
+
+ @asm eret
+
+ @rules {
+
+ check g_arm_instruction_set_cond(cond)
+
+ }
+
+ }
+
+}
+