Move all app common files under apps/common

apps/common/crt0.S

@@ -0,0 +1,24 @@
+#include "uvm32_sys.h"
+
+.equ uvm32_syscall_halt,          0x1000000
+.equ uvm32_syscall_yield,         0x1000001
+.equ uvm32_syscall_stackprotect,  0x1000002
+
+.section .initial_jump , "ax", %progbits
+.global _start
+.align 4
+_start:
+
+la a0, _estack
+li a7, uvm32_syscall_stackprotect
+ecall
+
+# sp is already setup by vm
+sw	ra,12(sp)
+jal	ra, main
+
+li a7, uvm32_syscall_halt
+ecall
+
+.section .data
+

apps/common/linker.ld

@@ -0,0 +1,86 @@
+/*__heap_size = 0x100; */
+/*__stack_size = 0x100; */
+
+ENTRY(_start)
+
+SECTIONS
+{
+	. = 0x80000000;
+/*
+	.header : ALIGN( 16 )
+	{
+		LONG( 0 )
+		LONG( 0 )
+	}
+*/
+	.text : ALIGN(16) {
+		__TEXT_BEGIN__ = .;
+		*(.initial_jump)
+		*(.entry.text)
+		*(.init.literal)
+		*(.init)
+		*(.text)
+		*(.literal .text .literal.* .text.* .stub)
+		*(.out_jump.literal.*)
+		*(.out_jump.*)
+		__TEXT_END__ = .;
+	}
+
+	/* If we're on a newer compiler */
+	/DISCARD/ :
+	{
+		*(.interp)
+		*(.dynsym)
+		*(.dynstr)
+		*(.header)
+	} : phdr
+
+	.data : ALIGN(16) {
+		__DATA_BEGIN__ = .;
+		*(.rodata)
+		*(.rodata.*)
+		*(.gnu.linkonce.r.*)
+		*(.rodata1)
+		*(.dynsbss)
+		*(.gnu.linkonce.sb.*)
+		*(.scommon)
+		*(.gnu.linkonce.sb2.*)
+		*(.sbss)
+		*(.sbss.*)
+		*(.sbss2)
+		*(.sbss2.*)
+		*(.dynbss)
+		*(.data)
+		*(.data.*)
+		*(.got)
+		*(.got.*)
+		__DATA_END__ = .;
+	}
+
+	.bss : ALIGN( 16 ) {
+		__BSS_BEGIN__ = .;
+		*(.bss) /* Tricky: BSS needs to be allocated but not sent. GCC Will not populate these for calculating data size */
+		*(.bss.*)
+		__BSS_END__ = .;
+	}
+
+/*
+	.heap : ALIGN( 16 ) {
+		_sheap = .;
+		. = . + __heap_size;
+		_eheap = .;
+	}
+*/
+/*
+	.stack : ALIGN( 16 ) {
+		_estack = .;
+		. = . + __stack_size;
+		_sstack = .;
+	}
+*/
+	.stack : ALIGN( 16 ) {
+		_estack = .;
+	}
+}
+
+

apps/common/makefile.common

@@ -0,0 +1,36 @@
+PREFIX:=riscv64-elf-
+OPT ?= -Os
+CFLAGS+=-I${TOPDIR}/common
+CFLAGS+=${OPT} -fno-stack-protector -fno-builtin-memcpy -fno-builtin
+CFLAGS+=-static-libgcc -fdata-sections -ffunction-sections
+CFLAGS+=-g -march=rv32im -mabi=ilp32 -static
+LDFLAGS:= -T ${TOPDIR}/apps/common/linker.ld -nostdlib -Wl,--gc-sections
+LIBS:= -lgcc # needed for softfp
+
+# check if the compiler is installed
+UNAME_S := $(shell uname -s)
+ifeq ($(UNAME_S),Darwin)
+    PREFIX=riscv64-elf-
+    ifeq (,$(shell which ${PREFIX}gcc))
+        $(error "Try brew install riscv64-elf-gcc riscv64-elf-binutils")
+    endif
+else
+    PREFIX=riscv64-unknown-elf-
+    ifeq (,$(shell which ${PREFIX}gcc))
+        $(error "Try apt-get install gcc-riscv64-unknown-elf")
+    endif
+endif
+
+all_common:
+	${PREFIX}gcc -o ${PROJECT}.elf ${CFLAGS} ${LDFLAGS} ${SRCS} ${LIBS}
+	@$(PREFIX)objcopy ${PROJECT}.elf -O binary ${PROJECT}.bin
+
+disasm_common: all
+	$(PREFIX)objdump -S -d -f ${PROJECT}.elf
+
+test_common: all
+	${TOPDIR}/hosts/host/host ${HOST_EXTRA} ${PWD}/${PROJECT}.bin
+
+clean_common:
+	rm -f ${PROJECT}.o ${PROJECT}.elf ${PROJECT}.bin
+