whatcanGOwrong

go/pkg/mod/github.com/cilium/ebpf@v0.11.0/asm/register.go

@@ -0,0 +1,51 @@
+package asm
+
+import (
+	"fmt"
+)
+
+// Register is the source or destination of most operations.
+type Register uint8
+
+// R0 contains return values.
+const R0 Register = 0
+
+// Registers for function arguments.
+const (
+	R1 Register = R0 + 1 + iota
+	R2
+	R3
+	R4
+	R5
+)
+
+// Callee saved registers preserved by function calls.
+const (
+	R6 Register = R5 + 1 + iota
+	R7
+	R8
+	R9
+)
+
+// Read-only frame pointer to access stack.
+const (
+	R10 Register = R9 + 1
+	RFP          = R10
+)
+
+// Pseudo registers used by 64bit loads and jumps
+const (
+	PseudoMapFD     = R1 // BPF_PSEUDO_MAP_FD
+	PseudoMapValue  = R2 // BPF_PSEUDO_MAP_VALUE
+	PseudoCall      = R1 // BPF_PSEUDO_CALL
+	PseudoFunc      = R4 // BPF_PSEUDO_FUNC
+	PseudoKfuncCall = R2 // BPF_PSEUDO_KFUNC_CALL
+)
+
+func (r Register) String() string {
+	v := uint8(r)
+	if v == 10 {
+		return "rfp"
+	}
+	return fmt.Sprintf("r%d", v)
+}