diff options
Diffstat (limited to 'libmalice.asm')
| -rw-r--r-- | libmalice.asm | 43 |
1 files changed, 13 insertions, 30 deletions
diff --git a/libmalice.asm b/libmalice.asm index adb9907..6e05076 100644 --- a/libmalice.asm +++ b/libmalice.asm @@ -39,21 +39,18 @@ jmp _start_end ; poor man's exception handling global lmPrintChar lmPrintChar: ; void lmPrintChar(int chr) -push eax ; will be: syscall number + ; eax ; will be: syscall number push ebx ; will be: stdout fd -push ecx ; will be: character start address -push edx ; will be: character counter + ; ecx ; will be: character start address + ; edx ; will be: character counter mov edx, 1 ; print one char -lea ecx, [esp+20] ; address of the char +lea ecx, [esp+8] ; address of the char mov ebx, 1 ; stdout fd mov eax, 4 ; write() int 0x80 -pop edx -pop ecx pop ebx -pop eax ret @@ -64,13 +61,13 @@ ret global lmPrintString lmPrintString: ; void lmPrintString(char *string) -push eax ; will be: syscall number + ; eax ; will be: syscall number push ebx ; will be: stdout fd -push ecx ; will be: character start address -push edx ; will be: character counter + ; ecx ; will be: character start address + ; edx ; will be: character counter mov eax, 0 ; prepare for holding a char -mov ecx, [esp+20] ; string start address +mov ecx, [esp+8] ; string start address mov edx, -1 ; init char counter to 0 _print_string_loop: @@ -83,10 +80,7 @@ mov ebx, 1 ; stdout fd mov eax, 4 ; write() int 0x80 -pop edx -pop ecx pop ebx -pop eax ret @@ -97,11 +91,11 @@ ret global lmPrintInt32s lmPrintInt32s: ; void lmPrintInt(int num) -push eax ; will be: dividend + ; eax ; will be: dividend push ebx ; will be: divisor -push ecx ; will be: character start address -push edx ; will be: character counter -mov eax, [esp+20] ; load num + ; ecx ; will be: character start address + ; edx ; will be: character counter +mov eax, [esp+8] ; load num sub esp, 12 ; make space for converted integer lea ecx, [esp+11] ; string offset counter, start at lastchar+1 ; so writing ends at 10 and char 11 is reserved @@ -121,7 +115,7 @@ _print_int_loop: test eax, eax jne _print_int_loop -cmp [esp+32], dword 0 ; check for negative number +cmp [esp+20], dword 0 ; check for negative number jge _print_int_end ; skip for positive dec ecx mov [ecx], byte '-' ; add - sign @@ -134,10 +128,7 @@ mov eax, 4 ; write() int 0x80 ; let the number speak add esp, 12 -pop edx -pop ecx pop ebx -pop eax ret @@ -149,8 +140,6 @@ ret global lmReadChar lmReadChar: ; int lmReadChar(void) push ebx -push ecx -push edx sub esp, 4 ; make room for character to be read @@ -172,8 +161,6 @@ mov al, [esp] _read_char_end: add esp, 4 -pop edx -pop ecx pop ebx ret @@ -187,8 +174,6 @@ ret global lmReadInt32s lmReadInt32s: ; int lmReadInt(void) push ebx -push ecx -push edx push esi ; negative number info push edi ; actual number @@ -257,8 +242,6 @@ mov eax, edi ; Return value: The number read add esp, 4 pop edi pop esi -pop edx -pop ecx pop ebx ret |