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@@ -0,0 +1,67 @@
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+/*
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+ * This file is part of the MicroPython project, http://micropython.org/
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+ *
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+ * The MIT License (MIT)
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+ *
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+ * Copyright (c) 2013-2014 Damien P. George
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+ *
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+ * Permission is hereby granted, free of charge, to any person obtaining a copy
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+ * of this software and associated documentation files (the "Software"), to deal
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+ * in the Software without restriction, including without limitation the rights
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+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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+ * copies of the Software, and to permit persons to whom the Software is
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+ * furnished to do so, subject to the following conditions:
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+ *
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+ * The above copyright notice and this permission notice shall be included in
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+ * all copies or substantial portions of the Software.
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+ *
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+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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+ * THE SOFTWARE.
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+ */
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+
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+ .syntax unified
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+ .cpu cortex-m3
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+ .thumb
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+
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+ .section .text
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+ .align 2
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+
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+ .global gc_helper_get_sp
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+ .type gc_helper_get_sp, %function
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+
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+@ uint gc_helper_get_sp(void)
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+gc_helper_get_sp:
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+ @ return the sp
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+ mov r0, sp
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+ bx lr
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+
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+ .size gc_helper_get_sp, .-gc_helper_get_sp
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+
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+
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+ .global gc_helper_get_regs_and_sp
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+ .type gc_helper_get_regs_and_sp, %function
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+
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+@ uint gc_helper_get_regs_and_sp(r0=uint regs[10])
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+gc_helper_get_regs_and_sp:
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+ @ store registers into given array
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+ str r4, [r0], #4
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+ str r5, [r0], #4
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+ str r6, [r0], #4
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+ str r7, [r0], #4
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+ str r8, [r0], #4
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+ str r9, [r0], #4
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+ str r10, [r0], #4
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+ str r11, [r0], #4
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+ str r12, [r0], #4
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+ str r13, [r0], #4
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+
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+ @ return the sp
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+ mov r0, sp
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+ bx lr
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+
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+ .size gc_helper_get_regs_and_sp, .-gc_helper_get_regs_and_sp
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