[olang/patches/.build.yml] build success

[olang/patches/.build.yml] build success

[builds.sr.ht]

olang/patches/.build.yml: SUCCESS in 38s

[fe: add compiler support to linux aarch64][0] from [Johnny Richard][1]

[0]: https://lists.sr.ht/~johnnyrichard/olang-devel/patches/50318
[1]: mailto:johnny@johnnyrichard.com

✓ #1173054 SUCCESS olang/patches/.build.yml https://builds.sr.ht/~johnnyrichard/job/1173054

[PATCH olang v1 0/3] fe: add compiler support to linux aarch64

[Johnny Richard]

This patchset adds more cli options to enable linux cross compiling.

Johnny Richard (3):
  cli: refactor: move cli parsing to a separted file
  cli: add --sysroot and --arch options
  codegen: add compiler support to linux aarch64 arch

 docs/manpages/olang.md       |  12 ++-
 src/cli.c                    | 147 +++++++++++++++++++++++++++++++++++
 src/cli.h                    |  54 +++++++++++++
 src/codegen_linux_aaarch64.c |  94 ++++++++++++++++++++++
 src/codegen_linux_aarch64.h  |  25 ++++++
 src/main.c                   | 132 +++++++++----------------------
 6 files changed, 366 insertions(+), 98 deletions(-)
 create mode 100644 src/cli.c
 create mode 100644 src/cli.h
 create mode 100644 src/codegen_linux_aaarch64.c
 create mode 100644 src/codegen_linux_aarch64.h


base-commit: 3249953fd5dd6e809266ecc8d24447e8fbc048bb
-- 
2.44.0

[PATCH olang v1 1/3] cli: refactor: move cli parsing to a separted file

[Johnny Richard]

Signed-off-by: Johnny Richard <johnny@johnnyrichard.com>
---
 src/cli.c  | 97 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
 src/cli.h  | 50 ++++++++++++++++++++++++++++
 src/main.c | 97 +++++-------------------------------------------------
 3 files changed, 155 insertions(+), 89 deletions(-)
 create mode 100644 src/cli.c
 create mode 100644 src/cli.h

diff --git a/src/cli.c b/src/cli.c
new file mode 100644
index 0000000..3d1c936
--- /dev/null
+++ b/src/cli.c
@@ -0,0 +1,97 @@
+/*
+ * Copyright (C) 2024 olang maintainers
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+#include "cli.h"
+#include <assert.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+static char *
+cli_args_shift(cli_args_t *args);
+
+static void
+cli_opts_parse_output(cli_opts_t *opts, cli_args_t *args);
+
+cli_opts_t
+cli_parse_args(int argc, char **argv)
+{
+    cli_args_t args = { .argc = argc, .argv = argv };
+    cli_opts_t opts = { 0 };
+
+    opts.compiler_path = cli_args_shift(&args);
+
+    char *arg = cli_args_shift(&args);
+    while (arg != NULL) {
+        if (strcmp(arg, "--dump-tokens") == 0) {
+            opts.options |= CLI_OPT_DUMP_TOKENS;
+        } else if (strcmp(arg, "--save-temps") == 0) {
+            opts.options |= CLI_OPT_SAVE_TEMPS;
+        } else if (strcmp(arg, "-o") == 0) {
+            cli_opts_parse_output(&opts, &args);
+        } else {
+            opts.file_path = arg;
+        }
+        arg = cli_args_shift(&args);
+    }
+
+    if (opts.options & CLI_OPT_OUTPUT || opts.options & CLI_OPT_DUMP_TOKENS) {
+        return opts;
+    }
+
+    cli_print_usage(stderr, opts.compiler_path);
+    exit(EXIT_FAILURE);
+    return opts;
+}
+
+static char *
+cli_args_shift(cli_args_t *args)
+{
+    if (args->argc == 0)
+        return NULL;
+    --(args->argc);
+    return *(args->argv)++;
+}
+
+static void
+cli_opts_parse_output(cli_opts_t *opts, cli_args_t *args)
+{
+    assert(opts && "opts is required");
+    assert(args && "args is required");
+
+    char *output_bin = cli_args_shift(args);
+
+    if (output_bin == NULL) {
+        fprintf(stderr, "error: missing filename after '-o'\n");
+        cli_print_usage(stderr, opts->compiler_path);
+        exit(EXIT_FAILURE);
+    }
+
+    opts->options |= CLI_OPT_OUTPUT;
+    opts->output_bin = string_view_from_cstr(output_bin);
+}
+
+void
+cli_print_usage(FILE *stream, char *compiler_path)
+{
+    fprintf(stream,
+            "Usage: %s [options] file...\n"
+            "Options:\n"
+            "  --dump-tokens\t\tDisplay lexer token stream\n"
+            "  -o <file>\t\tCompile program into a binary file\n"
+            "  --save-temps\t\tKeep temp files used to compile program\n",
+            compiler_path);
+}
diff --git a/src/cli.h b/src/cli.h
new file mode 100644
index 0000000..bd6d6a7
--- /dev/null
+++ b/src/cli.h
@@ -0,0 +1,50 @@
+/*
+ * Copyright (C) 2024 olang maintainers
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+#ifndef CLI_H
+#define CLI_H
+#include "string_view.h"
+#include <stdint.h>
+#include <stdio.h>
+
+typedef struct cli_args
+{
+    int argc;
+    char **argv;
+} cli_args_t;
+
+typedef struct cli_opts
+{
+    uint32_t options;
+    char *compiler_path;
+    char *file_path;
+    string_view_t output_bin;
+} cli_opts_t;
+
+typedef enum
+{
+    CLI_OPT_DUMP_TOKENS = 1 << 0,
+    CLI_OPT_OUTPUT = 1 << 1,
+    CLI_OPT_SAVE_TEMPS = 1 << 2
+} cli_opt_t;
+
+cli_opts_t
+cli_parse_args(int argc, char **argv);
+
+void
+cli_print_usage(FILE *stream, char *compiler_path);
+
+#endif /* CLI_H */
diff --git a/src/main.c b/src/main.c
index f6d49f0..f5b12e4 100644
--- a/src/main.c
+++ b/src/main.c
@@ -22,6 +22,7 @@
 #include <string.h>
 
 #include "arena.h"
+#include "cli.h"
 #include "codegen_linux_x86_64.h"
 #include "lexer.h"
 #include "parser.h"
@@ -30,33 +31,6 @@
 // TODO: find a better solution to define the arena capacity
 #define ARENA_CAPACITY (1024 * 1024)
 
-typedef struct cli_args
-{
-    int argc;
-    char **argv;
-} cli_args_t;
-
-char *
-cli_args_shift(cli_args_t *args);
-
-typedef enum
-{
-    CLI_OPT_DUMP_TOKENS = 1 << 0,
-    CLI_OPT_OUTPUT = 1 << 1,
-    CLI_OPT_SAVE_TEMPS = 1 << 2
-} cli_opt_t;
-
-typedef struct cli_opts
-{
-    uint32_t options;
-    char *compiler_path;
-    char *file_path;
-    string_view_t output_bin;
-} cli_opts_t;
-
-void
-print_usage(FILE *stream, char *compiler_path);
-
 void
 handle_dump_tokens(cli_opts_t *opts);
 
@@ -69,29 +43,14 @@ print_token(char *file_path, token_t *token);
 string_view_t
 read_entire_file(char *file_path, arena_t *arena);
 
-void
-cli_opts_parse_output(cli_opts_t *opts, cli_args_t *args);
-
 int
 main(int argc, char **argv)
 {
-    cli_args_t args = { .argc = argc, .argv = argv };
-    cli_opts_t opts = { 0 };
-
-    opts.compiler_path = cli_args_shift(&args);
-
-    char *arg = cli_args_shift(&args);
-    while (arg != NULL) {
-        if (strcmp(arg, "--dump-tokens") == 0) {
-            opts.options |= CLI_OPT_DUMP_TOKENS;
-        } else if (strcmp(arg, "--save-temps") == 0) {
-            opts.options |= CLI_OPT_SAVE_TEMPS;
-        } else if (strcmp(arg, "-o") == 0) {
-            cli_opts_parse_output(&opts, &args);
-        } else {
-            opts.file_path = arg;
-        }
-        arg = cli_args_shift(&args);
+    cli_opts_t opts = cli_parse_args(argc, argv);
+
+    if (opts.options & CLI_OPT_DUMP_TOKENS) {
+        handle_dump_tokens(&opts);
+        return EXIT_SUCCESS;
     }
 
     if (opts.options & CLI_OPT_OUTPUT) {
@@ -104,24 +63,14 @@ main(int argc, char **argv)
         return EXIT_SUCCESS;
     }
 
-    print_usage(stderr, opts.compiler_path);
     return EXIT_FAILURE;
 }
 
-char *
-cli_args_shift(cli_args_t *args)
-{
-    if (args->argc == 0)
-        return NULL;
-    --(args->argc);
-    return *(args->argv)++;
-}
-
 void
 handle_dump_tokens(cli_opts_t *opts)
 {
     if (opts->file_path == NULL) {
-        print_usage(stderr, opts->compiler_path);
+        cli_print_usage(stderr, opts->compiler_path);
         exit(EXIT_FAILURE);
     }
 
@@ -146,7 +95,7 @@ void
 handle_codegen_linux_x86_64(cli_opts_t *opts)
 {
     if (opts->file_path == NULL) {
-        print_usage(stderr, opts->compiler_path);
+        cli_print_usage(stderr, opts->compiler_path);
         exit(EXIT_FAILURE);
     }
 
@@ -188,18 +137,6 @@ handle_codegen_linux_x86_64(cli_opts_t *opts)
     arena_free(&arena);
 }
 
-void
-print_usage(FILE *stream, char *compiler_path)
-{
-    fprintf(stream,
-            "Usage: %s [options] file...\n"
-            "Options:\n"
-            "  --dump-tokens\t\tDisplay lexer token stream\n"
-            "  -o <file>\t\tCompile program into a binary file\n"
-            "  --save-temps\t\tKeep temp files used to compile program\n",
-            compiler_path);
-}
-
 string_view_t
 read_entire_file(char *file_path, arena_t *arena)
 {
@@ -231,24 +168,6 @@ read_entire_file(char *file_path, arena_t *arena)
     return file_content;
 }
 
-void
-cli_opts_parse_output(cli_opts_t *opts, cli_args_t *args)
-{
-    assert(opts && "opts is required");
-    assert(args && "args is required");
-
-    char *output_bin = cli_args_shift(args);
-
-    if (output_bin == NULL) {
-        fprintf(stderr, "error: missing filename after '-o'\n");
-        print_usage(stderr, opts->compiler_path);
-        exit(EXIT_FAILURE);
-    }
-
-    opts->options |= CLI_OPT_OUTPUT;
-    opts->output_bin = string_view_from_cstr(output_bin);
-}
-
 static void
 print_token(char *file_path, token_t *token)
 {
-- 
2.44.0

[PATCH olang v1 2/3] cli: add --sysroot and --arch options

[Johnny Richard]

In order to compile down into different architectures I am introducing
the --arch and --sysroot options.

The --arch option should enable the user to choose between to
"supported" architectures, which is x86_64 and aarch64.  The default
architecture is x86_64.

The --sysroot option is from where the compiler will find the gas
assembler and the gnu linker.

Signed-off-by: Johnny Richard <johnny@johnnyrichard.com>
---
 docs/manpages/olang.md | 12 ++++++---
 src/cli.c              | 56 +++++++++++++++++++++++++++++++++++++++---
 src/cli.h              |  6 ++++-
 src/main.c             | 34 ++++++++++++++++++++-----
 4 files changed, 95 insertions(+), 13 deletions(-)

diff --git a/docs/manpages/olang.md b/docs/manpages/olang.md
index c54c597..8ed6726 100644
--- a/docs/manpages/olang.md
+++ b/docs/manpages/olang.md
@@ -11,7 +11,7 @@ olang - O Programming Language compiler
 **olang**
     source_file
     [**----dump-tokens**]
-    [**--o** output_file [**----save-temps**]] 
+    [**--o** ___output_file___ [**----save-temps**] [**----arch** ___arch___] [**----sysroot** ___dir___]]
 
 # DESCRIPTION
 
@@ -23,8 +23,14 @@ contains utilities to help the language development.
 **----dump-tokens**
 :   Display lexical tokens given a soruce.0 code.
 
-**--o <file>**
-:  Compile program into a binary file
+**--o** ___file___
+:   Compile program into a binary file
 
 **----save-temps**
 :   Keep temp files used to compile program
+
+**----arch** ___architecture___
+:   Binary arch: default to "x86_64", avaliable options ("x86_64" | "aarch64")
+
+**----sysroot**  ___dir___
+:   System root dir where the GNU Assembler and GNU Linker are located: default to '/'
diff --git a/src/cli.c b/src/cli.c
index 3d1c936..a113bbb 100644
--- a/src/cli.c
+++ b/src/cli.c
@@ -26,6 +26,12 @@ cli_args_shift(cli_args_t *args);
 static void
 cli_opts_parse_output(cli_opts_t *opts, cli_args_t *args);
 
+static void
+cli_opts_parse_arch(cli_opts_t *opts, cli_args_t *args);
+
+static void
+cli_opts_parse_sysroot(cli_opts_t *opts, cli_args_t *args);
+
 cli_opts_t
 cli_parse_args(int argc, char **argv)
 {
@@ -42,6 +48,12 @@ cli_parse_args(int argc, char **argv)
             opts.options |= CLI_OPT_SAVE_TEMPS;
         } else if (strcmp(arg, "-o") == 0) {
             cli_opts_parse_output(&opts, &args);
+        } else if (strcmp(arg, "--arch") == 0) {
+            opts.options |= CLI_OPT_ARCH;
+            cli_opts_parse_arch(&opts, &args);
+        } else if (strcmp(arg, "--sysroot") == 0) {
+            opts.options |= CLI_OPT_SYSROOT;
+            cli_opts_parse_sysroot(&opts, &args);
         } else {
             opts.file_path = arg;
         }
@@ -84,14 +96,52 @@ cli_opts_parse_output(cli_opts_t *opts, cli_args_t *args)
     opts->output_bin = string_view_from_cstr(output_bin);
 }
 
+static void
+cli_opts_parse_arch(cli_opts_t *opts, cli_args_t *args)
+{
+    assert(opts && "opts is required");
+    assert(args && "args is required");
+
+    char *arch = cli_args_shift(args);
+
+    if (arch == NULL) {
+        fprintf(stderr, "error: missing architecture for arg '--arch': available options (x86_64 | aarch64)\n");
+        cli_print_usage(stderr, opts->compiler_path);
+        exit(EXIT_FAILURE);
+    }
+
+    opts->options |= CLI_OPT_ARCH;
+    opts->arch = arch;
+}
+
+static void
+cli_opts_parse_sysroot(cli_opts_t *opts, cli_args_t *args)
+{
+    assert(opts && "opts is required");
+    assert(args && "args is required");
+
+    char *sysroot = cli_args_shift(args);
+
+    if (sysroot == NULL) {
+        fprintf(stderr, "error: missing sysroot arg '--sysroot'\n");
+        cli_print_usage(stderr, opts->compiler_path);
+        exit(EXIT_FAILURE);
+    }
+
+    opts->options |= CLI_OPT_SYSROOT;
+    opts->sysroot = sysroot;
+}
+
 void
 cli_print_usage(FILE *stream, char *compiler_path)
 {
     fprintf(stream,
             "Usage: %s [options] file...\n"
             "Options:\n"
-            "  --dump-tokens\t\tDisplay lexer token stream\n"
-            "  -o <file>\t\tCompile program into a binary file\n"
-            "  --save-temps\t\tKeep temp files used to compile program\n",
+            "  --dump-tokens    Display lexer token stream\n"
+            "  --arch <arch>    Binary arch: default to x86_64 (x86_64 | aarch64)\n"
+            "  --sysroot <dir>  System root dir where the GNU Assembler and GNU Linker are located: default to '/'\n"
+            "  -o <file>        Compile program into a binary file\n"
+            "  --save-temps     Keep temp files used to compile program\n",
             compiler_path);
 }
diff --git a/src/cli.h b/src/cli.h
index bd6d6a7..b517b2c 100644
--- a/src/cli.h
+++ b/src/cli.h
@@ -29,6 +29,8 @@ typedef struct cli_args
 typedef struct cli_opts
 {
     uint32_t options;
+    char *arch;
+    char *sysroot;
     char *compiler_path;
     char *file_path;
     string_view_t output_bin;
@@ -38,7 +40,9 @@ typedef enum
 {
     CLI_OPT_DUMP_TOKENS = 1 << 0,
     CLI_OPT_OUTPUT = 1 << 1,
-    CLI_OPT_SAVE_TEMPS = 1 << 2
+    CLI_OPT_SAVE_TEMPS = 1 << 2,
+    CLI_OPT_ARCH = 1 << 3,
+    CLI_OPT_SYSROOT = 1 << 4
 } cli_opt_t;
 
 cli_opts_t
diff --git a/src/main.c b/src/main.c
index f5b12e4..3e1b2a3 100644
--- a/src/main.c
+++ b/src/main.c
@@ -35,7 +35,7 @@ void
 handle_dump_tokens(cli_opts_t *opts);
 
 void
-handle_codegen_linux_x86_64(cli_opts_t *opts);
+handle_codegen_linux(cli_opts_t *opts);
 
 static void
 print_token(char *file_path, token_t *token);
@@ -54,7 +54,7 @@ main(int argc, char **argv)
     }
 
     if (opts.options & CLI_OPT_OUTPUT) {
-        handle_codegen_linux_x86_64(&opts);
+        handle_codegen_linux(&opts);
         return EXIT_SUCCESS;
     }
 
@@ -92,7 +92,7 @@ handle_dump_tokens(cli_opts_t *opts)
 }
 
 void
-handle_codegen_linux_x86_64(cli_opts_t *opts)
+handle_codegen_linux(cli_opts_t *opts)
 {
     if (opts->file_path == NULL) {
         cli_print_usage(stderr, opts->compiler_path);
@@ -114,14 +114,36 @@ handle_codegen_linux_x86_64(cli_opts_t *opts)
 
     FILE *out = fopen(asm_file, "w");
     assert(out);
-    codegen_linux_x86_64_emit_program(out, ast);
+
+    if (!(opts->options & CLI_OPT_ARCH)) {
+        codegen_linux_x86_64_emit_program(out, ast);
+    } else {
+        if (strcmp(opts->arch, "x86_64") == 0) {
+            codegen_linux_x86_64_emit_program(out, ast);
+        } else if (strcmp(opts->arch, "aarch64") == 0) {
+            assert(false && "Not implemented yet.");
+        } else {
+            fprintf(stderr, "error: architecture '%s' not supported\n", opts->arch);
+            cli_print_usage(stderr, opts->compiler_path);
+            exit(EXIT_FAILURE);
+        }
+    }
+
     fclose(out);
 
+    if (!(opts->options & CLI_OPT_SYSROOT)) {
+        opts->sysroot = "";
+    }
+
     char command[512];
-    sprintf(command, "as %s -o " SV_FMT ".o", asm_file, SV_ARG(opts->output_bin));
+    sprintf(command, "%s/bin/as %s -o " SV_FMT ".o", opts->sysroot, asm_file, SV_ARG(opts->output_bin));
     system(command);
 
-    sprintf(command, "ld " SV_FMT ".o -o " SV_FMT "", SV_ARG(opts->output_bin), SV_ARG(opts->output_bin));
+    sprintf(command,
+            "%s/bin/ld " SV_FMT ".o -o " SV_FMT "",
+            opts->sysroot,
+            SV_ARG(opts->output_bin),
+            SV_ARG(opts->output_bin));
     system(command);
 
     if (!(opts->options & CLI_OPT_SAVE_TEMPS)) {
-- 
2.44.0

[PATCH olang v1 3/3] codegen: add compiler support to linux aarch64 arch

[Johnny Richard]

This patch adds codegen for aarch64.  If you want compile to aarch64
from a x86_64 machine you have to set the --sysroot and --arch argument
correctly as well (you might want to install gcc for the target
architecture and qemu to run the program).

    $ ./olang examples/main_exit.ol -o main --arch aarch64 --sysroot /usr/aarch64-linux-gnu
    $ qemu-aarch64 ./main
    $ echo $? # should return 0

Signed-off-by: Johnny Richard <johnny@johnnyrichard.com>
---
 src/codegen_linux_aaarch64.c | 94 ++++++++++++++++++++++++++++++++++++
 src/codegen_linux_aarch64.h  | 25 ++++++++++
 src/main.c                   |  3 +-
 3 files changed, 121 insertions(+), 1 deletion(-)
 create mode 100644 src/codegen_linux_aaarch64.c
 create mode 100644 src/codegen_linux_aarch64.h

diff --git a/src/codegen_linux_aaarch64.c b/src/codegen_linux_aaarch64.c
new file mode 100644
index 0000000..657a4f4
--- /dev/null
+++ b/src/codegen_linux_aaarch64.c
@@ -0,0 +1,94 @@
+/*
+ * Copyright (C) 2024 olang maintainers
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+#include <assert.h>
+#include <stdint.h>
+#include <stdio.h>
+
+#include "codegen_linux_aarch64.h"
+#include "list.h"
+
+#define SYS_exit (93)
+
+/**
+ *  ───────────────────────────────────────────────────────────────────
+ *  Arch/ABI    Instruction           System  Ret  Ret  Error    Notes
+ *                                    call #  val  val2
+ *  ───────────────────────────────────────────────────────────────────
+ *  arm64       svc #0                w8      x0   x1   -
+ *  ──────────────────────────────────────────────────────────────
+ *  Arch/ABI      arg1  arg2  arg3  arg4  arg5  arg6  arg7  Notes
+ *  ──────────────────────────────────────────────────────────────
+ *  arm64         x0    x1    x2    x3    x4    x5    -
+ */
+
+static void
+codegen_linux_aarch64_emit_start_entrypoint(FILE *out);
+
+static void
+codegen_linux_aarch64_emit_function(FILE *out, ast_fn_definition_t *fn);
+
+void
+codegen_linux_aarch64_emit_program(FILE *out, ast_node_t *node)
+{
+    codegen_linux_aarch64_emit_start_entrypoint(out);
+
+    assert(node->kind == AST_NODE_PROGRAM);
+    ast_program_t program = node->data.as_program;
+
+    ast_fn_definition_t fn = program.fn->data.as_fn_def;
+
+    assert(string_view_eq_to_cstr(fn.identifier, "main"));
+    codegen_linux_aarch64_emit_function(out, &fn);
+}
+
+static void
+codegen_linux_aarch64_emit_start_entrypoint(FILE *out)
+{
+    fprintf(out, ".text\n");
+    fprintf(out, ".globl _start\n\n");
+
+    fprintf(out, "_start:\n");
+    fprintf(out, "    bl main\n");
+    fprintf(out, "    mov w8, #%d\n", SYS_exit);
+    fprintf(out, "    svc #0\n");
+}
+
+static void
+codegen_linux_aarch64_emit_function(FILE *out, ast_fn_definition_t *fn)
+{
+    ast_node_t *block_node = fn->block;
+    assert(block_node->kind == AST_NODE_BLOCK);
+    ast_block_t block = block_node->data.as_block;
+
+    assert(list_size(block.nodes) == 1);
+
+    list_item_t *nodes_item = list_get(block.nodes, 0);
+    ast_node_t *return_node = nodes_item->value;
+    assert(return_node->kind == AST_NODE_RETURN_STMT);
+    ast_return_stmt_t return_stmt = return_node->data.as_return_stmt;
+
+    ast_node_t *literal_node = return_stmt.data;
+    assert(literal_node->kind == AST_NODE_LITERAL);
+    ast_literal_t literal_u32 = literal_node->data.as_literal;
+
+    assert(literal_u32.kind == AST_LITERAL_U32);
+    uint32_t exit_code = literal_u32.value.as_u32;
+
+    fprintf(out, "" SV_FMT ":\n", SV_ARG(fn->identifier));
+    fprintf(out, "    mov x0, #%d\n", exit_code);
+    fprintf(out, "    ret\n");
+}
diff --git a/src/codegen_linux_aarch64.h b/src/codegen_linux_aarch64.h
new file mode 100644
index 0000000..fb88b64
--- /dev/null
+++ b/src/codegen_linux_aarch64.h
@@ -0,0 +1,25 @@
+/*
+ * Copyright (C) 2024 olang maintainers
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+#ifndef CODEGEN_LINUX_AARCH64_H
+#define CODEGEN_LINUX_AARCH64_H
+
+#include "ast.h"
+
+void
+codegen_linux_aarch64_emit_program(FILE *out, ast_node_t *prog);
+
+#endif /* CODEGEN_LINUX_AARCH64_H */
diff --git a/src/main.c b/src/main.c
index 3e1b2a3..ff0aaa8 100644
--- a/src/main.c
+++ b/src/main.c
@@ -23,6 +23,7 @@
 
 #include "arena.h"
 #include "cli.h"
+#include "codegen_linux_aarch64.h"
 #include "codegen_linux_x86_64.h"
 #include "lexer.h"
 #include "parser.h"
@@ -121,7 +122,7 @@ handle_codegen_linux(cli_opts_t *opts)
         if (strcmp(opts->arch, "x86_64") == 0) {
             codegen_linux_x86_64_emit_program(out, ast);
         } else if (strcmp(opts->arch, "aarch64") == 0) {
-            assert(false && "Not implemented yet.");
+            codegen_linux_aarch64_emit_program(out, ast);
         } else {
             fprintf(stderr, "error: architecture '%s' not supported\n", opts->arch);
             cli_print_usage(stderr, opts->compiler_path);
-- 
2.44.0

Re: [PATCH olang v1 1/3] cli: refactor: move cli parsing to a separted file

[Carlos Maniero]

Appreciate your effort in segregating the refactor from the actual
modifications. It makes the code review process a breeze. Thanks!

Re: [PATCH olang v1 3/3] codegen: add compiler support to linux aarch64 arch

[Carlos Maniero]

Applied! Thanks.

To git.sr.ht:~johnnyrichard/olang
   3249953..64e2289  main -> main

Re: [PATCH olang v1 1/3] cli: refactor: move cli parsing to a separted file

[Johnny Richard]

On Sat, Mar 23, 2024 at 05:18:01PM -0300, Carlos Maniero wrote:
> Appreciate your effort in segregating the refactor from the actual
> modifications. It makes the code review process a breeze. Thanks!

Thanks for this.  I invested some time on it. 

PS: This is my first applied patch under revision 1.  :^)