mirror of
https://github.com/odin-lang/Odin.git
synced 2026-06-20 00:52:33 +00:00
33 lines
919 B
Odin
33 lines
919 B
Odin
package rexcode_mos65816
|
|
|
|
// =============================================================================
|
|
// 65816 RELOCATIONS
|
|
// =============================================================================
|
|
//
|
|
// Per the cross-arch design (§2.4): each arch owns its own Relocation_Type
|
|
// and Relocation struct. The 65816's relocation kinds reflect the four
|
|
// address widths it can patch:
|
|
//
|
|
// ABS16 2-byte LE absolute, low 16 of (base + target + addend)
|
|
// ABS24 3-byte LE absolute, low 24 of (base + target + addend)
|
|
// REL8 signed 8-bit PC-relative (target - (offset + 1))
|
|
// REL16 signed 16-bit PC-relative (target - (offset + 2)) -- BRL, PER
|
|
|
|
Relocation_Type :: enum u8 {
|
|
NONE = 0,
|
|
ABS16,
|
|
ABS24,
|
|
REL8,
|
|
REL16,
|
|
}
|
|
|
|
Relocation :: struct #packed {
|
|
offset: u32,
|
|
label_id: u32,
|
|
addend: i32,
|
|
type: Relocation_Type,
|
|
size: u8,
|
|
inst_idx: u16,
|
|
}
|
|
#assert(size_of(Relocation) == 16)
|