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Move system calling code to the end

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This commit is contained in:
Aryadev Chavali
2024-12-24 22:57:28 +00:00
parent 493b98c524
commit 70cfeac995
1 changed files with 37 additions and 38 deletions
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75
assembler.c
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@@ -14,44 +14,6 @@ struct Label
u64 cur, next;
};
/* First, the functions to call external utilities (badly written, I know). They
* presume a filled asm_buffer. */
void asm_write(const char *asm_name, vec_t *asm_buffer)
{
FILE *fp = fopen(asm_name, "w");
fwrite(asm_buffer->data, asm_buffer->size, 1, fp);
fclose(fp);
}
int asm_assemble(const char *asm_name, const char *objname)
{
#ifdef DEBUG
char *format_str = "yasm -f elf64 -g dwarf2 -o %s %s";
#else
char *format_str = "yasm -f elf64 -o %s %s";
#endif
char command[snprintf(NULL, 0, format_str, objname, asm_name) + 1];
sprintf(command, format_str, objname, asm_name);
return system(command);
}
int asm_link(const char *objname, const char *outname)
{
char *format_str = "ld -o %s %s";
char command[snprintf(NULL, 0, format_str, outname, objname) + 1];
sprintf(command, format_str, outname, objname);
return system(command);
}
int asm_compile(vec_t *asm_buffer, const char *asm_name, const char *objname,
const char *outname)
{
asm_write(asm_name, asm_buffer);
asm_assemble(asm_name, objname);
return asm_link(objname, outname);
}
// A table which translates brainfuck operations into generic assembly code (I
// love C's array indexing)
static const struct
@@ -204,3 +166,40 @@ void asm_write_exit(vec_t *asm_buffer)
" 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)
{
FILE *fp = fopen(asm_name, "w");
fwrite(asm_buffer->data, asm_buffer->size, 1, fp);
fclose(fp);
}
int asm_assemble(const char *asm_name, const char *objname)
{
#ifdef DEBUG
char *format_str = "yasm -f elf64 -g dwarf2 -o %s %s";
#else
char *format_str = "yasm -f elf64 -o %s %s";
#endif
char command[snprintf(NULL, 0, format_str, objname, asm_name) + 1];
sprintf(command, format_str, objname, asm_name);
return system(command);
}
int asm_link(const char *objname, const char *outname)
{
char *format_str = "ld -o %s %s";
char command[snprintf(NULL, 0, format_str, outname, objname) + 1];
sprintf(command, format_str, outname, objname);
return system(command);
}
int asm_compile(vec_t *asm_buffer, const char *asm_name, const char *objname,
const char *outname)
{
asm_write(asm_name, asm_buffer);
asm_assemble(asm_name, objname);
return asm_link(objname, outname);
}