feat: add ex 5-2 ~ 5-9

code/exercises/ex_5_2/Makefile

@@ -0,0 +1,48 @@
+EXEC = test
+
+SRC = ${EXEC}.s
+
+GDBINIT = ../gdbinit
+
+CROSS_COMPILE = riscv64-unknown-elf-
+CFLAGS = -nostdlib -fno-builtin -march=rv32ima -mabi=ilp32 -g -Wall
+
+QEMU = qemu-system-riscv32
+QFLAGS = -nographic -smp 1 -machine virt -bios none
+
+GDB = gdb-multiarch
+CC = ${CROSS_COMPILE}gcc
+OBJCOPY = ${CROSS_COMPILE}objcopy
+OBJDUMP = ${CROSS_COMPILE}objdump
+
+.DEFAULT_GOAL := all
+all:
+	@${CC} ${CFLAGS} ${SRC} -Ttext=0x80000000 -o ${EXEC}.elf
+	@${OBJCOPY} -O binary ${EXEC}.elf ${EXEC}.bin
+
+.PHONY : run
+run: all
+	@echo "Press Ctrl-A and then X to exit QEMU"
+	@echo "------------------------------------"
+	@echo "No output, please run 'make debug' to see details"
+	@${QEMU} ${QFLAGS} -kernel ./${EXEC}.elf
+
+.PHONY : debug
+debug: all
+	@echo "Press Ctrl-C and then input 'quit' to exit GDB and QEMU"
+	@echo "-------------------------------------------------------"
+	@${QEMU} ${QFLAGS} -kernel ${EXEC}.elf -s -S &
+	@${GDB} ${EXEC}.elf -q -x ${GDBINIT}
+
+.PHONY : code
+code: all
+	@${OBJDUMP} -S ${EXEC}.elf | less
+
+.PHONY : hex
+hex: all
+	@hexdump -C ${EXEC}.bin
+
+.PHONY : clean
+clean:
+	rm -rf *.o *.bin *.elf
+

code/exercises/ex_5_2/test.s

@@ -0,0 +1,10 @@
+    .text
+    .global _start
+_start:
+    li a0, 1
+    li a1, 2
+    li a2, 3
+    add a3, a0, a1
+    sub a4, a3, a2
+    j _start
+.end      # End of file

code/exercises/ex_5_3/Makefile

@@ -0,0 +1,48 @@
+EXEC = test
+
+SRC = ${EXEC}.s
+
+GDBINIT = ./gdbinit
+
+CROSS_COMPILE = riscv64-unknown-elf-
+CFLAGS = -nostdlib -fno-builtin -march=rv32ima -mabi=ilp32 -g -Wall
+
+QEMU = qemu-system-riscv32
+QFLAGS = -nographic -smp 1 -machine virt -bios none
+
+GDB = gdb-multiarch
+CC = ${CROSS_COMPILE}gcc
+OBJCOPY = ${CROSS_COMPILE}objcopy
+OBJDUMP = ${CROSS_COMPILE}objdump
+
+.DEFAULT_GOAL := all
+all:
+	@${CC} ${CFLAGS} ${SRC} -Ttext=0x80000000 -o ${EXEC}.elf
+	@${OBJCOPY} -O binary ${EXEC}.elf ${EXEC}.bin
+
+.PHONY : run
+run: all
+	@echo "Press Ctrl-A and then X to exit QEMU"
+	@echo "------------------------------------"
+	@echo "No output, please run 'make debug' to see details"
+	@${QEMU} ${QFLAGS} -kernel ./${EXEC}.elf
+
+.PHONY : debug
+debug: all
+	@echo "Press Ctrl-C and then input 'quit' to exit GDB and QEMU"
+	@echo "-------------------------------------------------------"
+	@${QEMU} ${QFLAGS} -kernel ${EXEC}.elf -s -S &
+	@${GDB} ${EXEC}.elf -q -x ${GDBINIT}
+
+.PHONY : code
+code: all
+	@${OBJDUMP} -S ${EXEC}.elf | less
+
+.PHONY : hex
+hex: all
+	@hexdump -C ${EXEC}.bin
+
+.PHONY : clean
+clean:
+	rm -rf *.o *.bin *.elf
+

code/exercises/ex_5_3/gdbinit

@@ -0,0 +1,12 @@
+display/z $a0
+display/z $a1
+display/z $a2
+display/z $a3
+display/z $a4
+display/z $a5
+display/z $a6
+
+set disassemble-next-line on
+b _start
+target remote : 1234
+c

code/exercises/ex_5_3/test.s

@@ -0,0 +1,12 @@
+    .text
+    .global _start
+_start:
+    li a0, 1
+    li a1, 2
+    li a2, 3
+    li a3, 4
+    add a4, a0, a1
+    add a5, a2, a3
+    sub a6, a4, a5
+    j _start
+.end      # End of file

code/exercises/ex_5_4/Makefile

@@ -0,0 +1,48 @@
+EXEC = test
+
+SRC = ${EXEC}.s
+
+GDBINIT = ./gdbinit
+
+CROSS_COMPILE = riscv64-unknown-elf-
+CFLAGS = -nostdlib -fno-builtin -march=rv32ima -mabi=ilp32 -g -Wall
+
+QEMU = qemu-system-riscv32
+QFLAGS = -nographic -smp 1 -machine virt -bios none
+
+GDB = gdb-multiarch
+CC = ${CROSS_COMPILE}gcc
+OBJCOPY = ${CROSS_COMPILE}objcopy
+OBJDUMP = ${CROSS_COMPILE}objdump
+
+.DEFAULT_GOAL := all
+all:
+	@${CC} ${CFLAGS} ${SRC} -Ttext=0x80000000 -o ${EXEC}.elf
+	@${OBJCOPY} -O binary ${EXEC}.elf ${EXEC}.bin
+
+.PHONY : run
+run: all
+	@echo "Press Ctrl-A and then X to exit QEMU"
+	@echo "------------------------------------"
+	@echo "No output, please run 'make debug' to see details"
+	@${QEMU} ${QFLAGS} -kernel ./${EXEC}.elf
+
+.PHONY : debug
+debug: all
+	@echo "Press Ctrl-C and then input 'quit' to exit GDB and QEMU"
+	@echo "-------------------------------------------------------"
+	@${QEMU} ${QFLAGS} -kernel ${EXEC}.elf -s -S &
+	@${GDB} ${EXEC}.elf -q -x ${GDBINIT}
+
+.PHONY : code
+code: all
+	@${OBJDUMP} -S ${EXEC}.elf | less
+
+.PHONY : hex
+hex: all
+	@hexdump -C ${EXEC}.bin
+
+.PHONY : clean
+clean:
+	rm -rf *.o *.bin *.elf
+

code/exercises/ex_5_4/gdbinit

@@ -0,0 +1,8 @@
+display/z $a0
+display/z $a1
+display/z $a2
+
+set disassemble-next-line on
+b _start
+target remote : 1234
+c

code/exercises/ex_5_4/test.c

@@ -0,0 +1,10 @@
+#include <stdio.h>
+
+int main()
+{
+    unsigned int a = 0x87654321;
+    unsigned int low = a & 0xffff;
+    unsigned int high = a >> 16;
+    printf("low: %x, high: %x\n", low, high);
+    return 0;
+}

code/exercises/ex_5_4/test.s

@@ -0,0 +1,9 @@
+    .text
+    .global _start
+_start:
+    li a0, 0x87654321
+    slli a1, a0, 16
+    srli a1, a1, 16
+    srli a2, a0, 16
+    j _start
+.end      # End of file

code/exercises/ex_5_5/Makefile

@@ -0,0 +1,48 @@
+EXEC = test
+
+SRC = ${EXEC}.s
+
+GDBINIT = ./gdbinit
+
+CROSS_COMPILE = riscv64-unknown-elf-
+CFLAGS = -nostdlib -fno-builtin -march=rv32ima -mabi=ilp32 -g -Wall
+
+QEMU = qemu-system-riscv32
+QFLAGS = -nographic -smp 1 -machine virt -bios none
+
+GDB = gdb-multiarch
+CC = ${CROSS_COMPILE}gcc
+OBJCOPY = ${CROSS_COMPILE}objcopy
+OBJDUMP = ${CROSS_COMPILE}objdump
+
+.DEFAULT_GOAL := all
+all:
+	@${CC} ${CFLAGS} ${SRC} -Ttext=0x80000000 -o ${EXEC}.elf
+	@${OBJCOPY} -O binary ${EXEC}.elf ${EXEC}.bin
+
+.PHONY : run
+run: all
+	@echo "Press Ctrl-A and then X to exit QEMU"
+	@echo "------------------------------------"
+	@echo "No output, please run 'make debug' to see details"
+	@${QEMU} ${QFLAGS} -kernel ./${EXEC}.elf
+
+.PHONY : debug
+debug: all
+	@echo "Press Ctrl-C and then input 'quit' to exit GDB and QEMU"
+	@echo "-------------------------------------------------------"
+	@${QEMU} ${QFLAGS} -kernel ${EXEC}.elf -s -S &
+	@${GDB} ${EXEC}.elf -q -x ${GDBINIT}
+
+.PHONY : code
+code: all
+	@${OBJDUMP} -S ${EXEC}.elf | less
+
+.PHONY : hex
+hex: all
+	@hexdump -C ${EXEC}.bin
+
+.PHONY : clean
+clean:
+	rm -rf *.o *.bin *.elf
+

code/exercises/ex_5_5/gdbinit

@@ -0,0 +1,8 @@
+display/z $a0
+display/z $a1
+display/z $t0
+
+set disassemble-next-line on
+b _start
+target remote : 1234
+c

code/exercises/ex_5_5/test.s

@@ -0,0 +1,11 @@
+    .data
+array: .word 0x11111111, 0xffffffff
+
+    .text
+    .global _start
+_start:
+    la t0, array # load address of array into t0
+    lw a0, 0(t0) # load first element of array into a0 (i)
+    lw a1, 4(t0) # load second element of array into a1 (j)
+    j _start     # Jump to _start
+.end      # End of file

code/exercises/ex_5_6/Makefile

@@ -0,0 +1,48 @@
+EXEC = test
+
+SRC = ${EXEC}.s
+
+GDBINIT = ./gdbinit
+
+CROSS_COMPILE = riscv64-unknown-elf-
+CFLAGS = -nostdlib -fno-builtin -march=rv32ima -mabi=ilp32 -g -Wall
+
+QEMU = qemu-system-riscv32
+QFLAGS = -nographic -smp 1 -machine virt -bios none
+
+GDB = gdb-multiarch
+CC = ${CROSS_COMPILE}gcc
+OBJCOPY = ${CROSS_COMPILE}objcopy
+OBJDUMP = ${CROSS_COMPILE}objdump
+
+.DEFAULT_GOAL := all
+all:
+	@${CC} ${CFLAGS} ${SRC} -Ttext=0x80000000 -o ${EXEC}.elf
+	@${OBJCOPY} -O binary ${EXEC}.elf ${EXEC}.bin
+
+.PHONY : run
+run: all
+	@echo "Press Ctrl-A and then X to exit QEMU"
+	@echo "------------------------------------"
+	@echo "No output, please run 'make debug' to see details"
+	@${QEMU} ${QFLAGS} -kernel ./${EXEC}.elf
+
+.PHONY : debug
+debug: all
+	@echo "Press Ctrl-C and then input 'quit' to exit GDB and QEMU"
+	@echo "-------------------------------------------------------"
+	@${QEMU} ${QFLAGS} -kernel ${EXEC}.elf -s -S &
+	@${GDB} ${EXEC}.elf -q -x ${GDBINIT}
+
+.PHONY : code
+code: all
+	@${OBJDUMP} -S ${EXEC}.elf | less
+
+.PHONY : hex
+hex: all
+	@hexdump -C ${EXEC}.bin
+
+.PHONY : clean
+clean:
+	rm -rf *.o *.bin *.elf
+

code/exercises/ex_5_6/gdbinit

@@ -0,0 +1,8 @@
+display/z $a0
+display/z $a1
+display/z $t0
+
+set disassemble-next-line on
+b _start
+target remote : 1234
+c

code/exercises/ex_5_6/test.s

@@ -0,0 +1,26 @@
+    .data
+s: .word 0, 0
+
+.macro set_struct st
+    la t0, \st
+    sw a0, 0(t0)
+    sw a1, 4(t0)
+.endm
+
+.macro get_struct st
+    la t0, \st
+    lw a0, 0(t0)
+    lw a1, 4(t0)
+.endm
+
+    .text
+    .global _start
+_start:
+    li a0, 0x12345678 # a = 0x12345678
+    li a1, 0x87654321 # b = 0x87654321
+    set_struct s
+    li a0, 0
+    li a1, 0 
+    get_struct s
+    j _start
+.end