diff options
Diffstat (limited to 'assembler.c')
| -rw-r--r-- | assembler.c | 45 |
1 files changed, 15 insertions, 30 deletions
diff --git a/assembler.c b/assembler.c index cabca41..87a672b 100644 --- a/assembler.c +++ b/assembler.c @@ -47,16 +47,18 @@ i64 get_abs_label(u64, struct Label *, u64); // and next items in given pointers. void ast_ref_to_asm_label(u64, struct Label *, u64, i64 *, i64 *); -// Write the initial boilerplate of the assembly file -void asm_write_init(vec_t *asm_buffer); - -// Write the exit code boilerplate for the assembly file -void asm_write_exit(vec_t *asm_buffer); - void asm_translate_nodes(vec_t *asm_buffer, struct PResult nodes, const char *src_name) { - asm_write_init(asm_buffer); + vec_append_fmt(asm_buffer, + "section .bss\n" + " memory resb %d\n" + "section .text\n" + "global _start\n" + "_start:\n" + " mov r9, memory\n", + MEMORY_DEFAULT); + // First pass: Setup the ASM label array struct Label labels[nodes.labels ? nodes.labels * 2 : 1]; if (nodes.labels) @@ -116,7 +118,12 @@ void asm_translate_nodes(vec_t *asm_buffer, struct PResult nodes, } vec_append_fmt(asm_buffer, format_string, current_label, next_label); } - asm_write_exit(asm_buffer); + + vec_append(asm_buffer, + " mov rax, 60\n" + " mov rdi, 0\n" + " syscall\n", + 37); } /* Implementations for throwaway functions */ @@ -138,28 +145,6 @@ void ast_ref_to_asm_label(u64 ref, struct Label *labels, u64 size, i64 *cur, *next = get_abs_label(labels[*cur].next, labels, size); } -// Write the initial boilerplate of the assembly file -void asm_write_init(vec_t *asm_buffer) -{ - const char format_string[] = "section .bss\n" - " memory resb %d\n" - "section .text\n" - "global _start\n" - "_start:\n" - " mov r9, memory\n"; - vec_append_fmt(asm_buffer, format_string, MEMORY_DEFAULT); -} - -// Write the exit code for the assembly file -void asm_write_exit(vec_t *asm_buffer) -{ - vec_append(asm_buffer, - " mov rax, 60\n" - " mov rdi, 0\n" - " syscall\n", - 37); -} - /* The system calling code - not exactly pretty, but it is what it is. */ void asm_write(const char *asm_name, vec_t *asm_buffer) |