Add an example program in C
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7 changed files with 53 additions and 8 deletions
1
.gitignore
vendored
1
.gitignore
vendored
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@ -18,3 +18,4 @@ CTestTestfile.cmake
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Testing
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Testing
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result
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result
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build
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build
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example/example
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2
example/Makefile
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2
example/Makefile
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@ -0,0 +1,2 @@
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example: example.c
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riscv32-none-elf-gcc -fno-builtin -fvisibility=hidden -nostdlib -nostartfiles -march=rv32im -mabi=ilp32 -o example example.c -T linker.ld
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9
example/example.c
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9
example/example.c
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@ -0,0 +1,9 @@
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static int mem;
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int main() {
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int a = 42;
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int b = 5;
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mem = a*b + 3;
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return 0;
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}
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19
example/linker.ld
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19
example/linker.ld
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@ -0,0 +1,19 @@
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ENTRY(_start)
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SECTIONS {
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. = 0x1000; /* Start address of the program */
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.text : {
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*(.text) /* Place all .text sections (code) here */
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}
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.data : {
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*(.data) /* Place all .data sections (initialized data) here */
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}
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.bss : {
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*(.bss) /* Place all .bss sections (uninitialized data) here */
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}
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/DISCARD/ : { *(.note.GNU-stack) } /* Discard stack section */
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}
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12
flake.nix
12
flake.nix
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@ -21,16 +21,22 @@
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forAllSystems = f: nixpkgs.lib.genAttrs allSystems (system: f {
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forAllSystems = f: nixpkgs.lib.genAttrs allSystems (system: f {
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pkgs = import nixpkgs { inherit system; };
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pkgs = import nixpkgs { inherit system; };
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});
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});
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riscv-pkgs = import nixpkgs {
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localSystem = "x86_64-linux";
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crossSystem = {
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config = "riscv32-unknown-linux-gnu";
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};
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};
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in
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in
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{
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{
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packages = forAllSystems( {pkgs}:
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packages = forAllSystems( {pkgs}:
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{
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{
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lisp = (pkgs.callPackage ./rve.nix {});
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lisp = (pkgs.callPackage ./rve.nix {riscv-pkgs=riscv-pkgs;});
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default = (pkgs.callPackage ./rve.nix {});
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default = (pkgs.callPackage ./rve.nix {riscv-pkgs=riscv-pkgs;});
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}
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}
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);
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);
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overlays.default = final: prev: {
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overlays.default = final: prev: {
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lisp = (prev.callPackage ./rve.nix {});
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lisp = (prev.callPackage ./rve.nix {riscv-pkgs=riscv-pkgs;});
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};
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};
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};
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};
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}
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}
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12
rve.nix
12
rve.nix
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@ -1,4 +1,4 @@
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{ pkgs, stdenv }:
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{ pkgs, stdenv, riscv-pkgs }:
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pkgs.gcc13Stdenv.mkDerivation rec {
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pkgs.gcc13Stdenv.mkDerivation rec {
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pname = "rve";
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pname = "rve";
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version = "0.1.0";
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version = "0.1.0";
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@ -13,7 +13,15 @@ pkgs.gcc13Stdenv.mkDerivation rec {
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nativeBuildInputs = with pkgs; [ pkg-config cmake ninja ];
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nativeBuildInputs = with pkgs; [ pkg-config cmake ninja ];
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buildInputs = with pkgs; [ gdb linuxPackages.perf jq lcov ];
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buildInputs = with pkgs; [
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gdb
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linuxPackages.perf
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jq
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lcov
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#riscv-pkgs.buildPackages.gcc
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pkgsCross.riscv32-embedded.buildPackages.gcc
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pkgsCross.riscv32-embedded.buildPackages.binutils
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];
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hardeningDisable = [ "all" ];
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hardeningDisable = [ "all" ];
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cmakeFlags = [
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cmakeFlags = [
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@ -5,7 +5,7 @@
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#include <cstring>
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#include <cstring>
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int main() {
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int main() {
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const size_t MEMORY_SIZE = 1024;
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const size_t MEMORY_SIZE = 128*1024;
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uint8_t memory[MEMORY_SIZE] = {0};
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uint8_t memory[MEMORY_SIZE] = {0};
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uint32_t program[] = {
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uint32_t program[] = {
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