Describe the stack alignment or ABI required on for the entry function
adsnaider opened this issue · 2 comments
As far as I can see, the limine protocol specification doesn't actually specify if the stack will be aligned to 16-bytes on entry, or offset by 8 bytes. If the entry is required to follow the C ABI, then that would be sufficient. Experimentally, the stack is at an 8-byte offset alignment which matches the C ABI. This is actually contrary to _start function which assumes a 16-byte aligned stack. I don't really care which it is I mostly want to make sure it's well-defined and documented somewhere.
This is specified in the "General Notes" section:
The calling convention matches the C ABI for the specific architecture (SysV for x86, AAPCS LP64 for aarch64, LP64 for riscv64).
Yeah, it's described there. Closing the issue, if you have any other concern please let me know.