Add support for the Analog Devices Blackfin mmuless processor

1 files changed, 110 insertions, 0 deletions

diff --git a/libc/sysdeps/linux/bfin/__longjmp.S b/libc/sysdeps/linux/bfin/__longjmp.S
new file mode 100644
index 000000000..4c5189976
--- /dev/null
+++ b/libc/sysdeps/linux/bfin/__longjmp.S
@@ -0,0 +1,110 @@
+/*
+ * longjmp for the Blackfin project
+ *
+ * Copyright (C) 2004,
+ * Based on code from Analog Devices.
+ *
+ * This file is subject to the terms and conditions of the GNU Lesser
+ * General Public License.  See the file COPYING.LIB in the main
+ * directory of this archive for more details.
+ *
+ */
+#include <features.h>
+#define _SETJMP_H
+#define _ASM
+#include <bits/setjmp.h>
+
+.globl ___longjmp;
+.align 4;
+
+___longjmp:
+	P0 = R0;
+	R0 = [P0 + 0x00];
+	[--SP] = R0;		// Put P0 on the stack
+
+	P1 = [P0 + 0x04];
+	P2 = [P0 + 0x08];
+	P3 = [P0 + 0x0C];
+	P4 = [P0 + 0x10];
+	P5 = [P0 + 0x14];
+
+	FP = [P0 + 0x18];
+	R0 = [SP++];		// Grab P0 from old stack
+	SP = [P0 + 0x1C];	// Update Stack Pointer
+	[--SP] = R0;		// Put P0 on new stack
+	[--SP] = R1;		// Put VAL arg on new stack
+
+	R0 = [P0 + 0x20];	// Data Registers
+	R1 = [P0 + 0x24];
+	R2 = [P0 + 0x28];
+	R3 = [P0 + 0x2C];
+	R4 = [P0 + 0x30];
+	R5 = [P0 + 0x34];
+	R6 = [P0 + 0x38];
+	R7 = [P0 + 0x3C];
+
+	R0 = [P0 + 0x40];
+	ASTAT = R0;
+
+	R0 = [P0 + 0x44];	// Loop Counters
+	LC0 = R0;
+	R0 = [P0 + 0x48];
+	LC1 = R0;
+
+	R0 = [P0 + 0x4C];	// Accumulators
+	A0.W = R0;
+	R0 = [P0 + 0x50];
+	A0.X = R0;
+	R0 = [P0 + 0x54];
+	A1.W = R0;
+	R0 = [P0 + 0x58];
+	A1.X = R0;
+
+	R0 = [P0 + 0x5C];	// Index Registers
+	I0 = R0;
+	R0 = [P0 + 0x60];
+	I1 = R0;
+	R0 = [P0 + 0x64];
+	I2 = R0;
+	R0 = [P0 + 0x68];
+	I3 = R0;
+
+	R0 = [P0 + 0x6C];	// Modifier Registers
+	M0 = R0;
+	R0 = [P0 + 0x70];
+	M1 = R0;
+	R0 = [P0 + 0x74];
+	M2 = R0;
+	R0 = [P0 + 0x78];
+	M3 = R0;
+
+	R0 = [P0 + 0x7C];	// Length Registers
+	L0 = R0;
+	R0 = [P0 + 0x80];
+	L1 = R0;
+	R0 = [P0 + 0x84];
+	L2 = R0;
+	R0 = [P0 + 0x88];
+	L3 = R0;
+
+	R0 = [P0 + 0x8C];	// Base Registers
+	B0 = R0;
+	R0 = [P0 + 0x90];
+	B1 = R0;
+	R0 = [P0 + 0x94];
+	B2 = R0;
+	R0 = [P0 + 0x98];
+	B3 = R0;
+
+	R0 = [P0 + 0x9C];	// Return Address (PC)
+	RETS = R0;
+
+	R0 = [SP++];
+	P0 = [SP++];
+
+	CC = R0 == 0;
+	IF !CC JUMP finished;
+	R0 = 1;
+finished:
+	RTS;
+___longjmp.end: