aboutsummaryrefslogtreecommitdiff
path: root/lib/arch/riscv64/README.md
blob: 517ddb2ff723aa07028ea361bc9dabc8536b86f8 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
# riscv64 (RISC-V ELF)
Provide an implementation of the platform specific API as required in
[`api.h`](../api.h) according to the `RISC-V ELF ABI`.

## Notes: RISC-V ABI
- Integer/pointer arguments via `x10 - x17`
- Integer/pointer return values via `x10` - `x11`
- Callee saved registers `x2`, `x8` - `x9`, `x18` - `x27`, `f8` - `f9`, `f18` - `f27`

## References
- [RISC-V ABI](https://github.com/riscv/riscv-elf-psabi-doc/blob/master/riscv-elf.md)
- [RISC-V asm manual](https://github.com/riscv/riscv-asm-manual/blob/master/riscv-asm.md)