From bf2c6f765db1b349d5bd5ce98631144f9cab654a Mon Sep 17 00:00:00 2001 From: Johnny Richard Date: Sat, 15 Apr 2023 03:07:21 +0200 Subject: parser: Generate GAS 64-bit assembly for linux Signed-off-by: Johnny Richard --- src/pipac.c | 20 +++++++++++++++++++- 1 file changed, 19 insertions(+), 1 deletion(-) (limited to 'src/pipac.c') diff --git a/src/pipac.c b/src/pipac.c index 29c21bd..993d56d 100644 --- a/src/pipac.c +++ b/src/pipac.c @@ -16,9 +16,27 @@ */ #include #include +#include + #include "lexer.h" #include "parser.h" +void +generate_gas_x86_64_linux(ast_function_t *func) +{ + if (strcmp(func->name, "main") != 0) { + fprintf(stderr, "[ERROR]: no main function has been defined!\n"); + exit(EXIT_FAILURE); + } + + printf(".global _start\n"); + printf(".text\n"); + printf("_start:\n"); + printf(" mov $1, %%al\n"); + printf(" mov $%d, %%ebx\n", func->body.number); + printf(" int $0x80\n"); +} + void print_usage() { @@ -50,7 +68,7 @@ main(int argc, char **argv) parser_init(&parser, &lexer); ast_function_t func = parser_parse_function(&parser); - printf("function name='%s' and return type '%d' with value %d\n", func.name, func.return_type, func.body.number); + generate_gas_x86_64_linux(&func); return EXIT_SUCCESS; } -- cgit v1.2.3