ableos/c-abi.md
2023-09-08 10:46:41 +02:00

1 KiB

C ABI (proposal)

C datatypes

C Type Description Size (B)
char Character / byte 8
short Short integer 16
int Integer 32
long Long integer 64
long long Long long integer 64
T* Pointer 64
float Single-precision float 32
double Double-precision float 64
long double Extended-precision float Bikeshed

Registers

Register ABI Name Description Saver
r0 Zero register N/A
r1 ra Return address Caller
r2 sp Stack pointer Callee
r3 tp Thread pointer N/A

TODO: Parameters

TODO: Saved

TODO: Temp