ebpf: encode platform in type constants

asm/func.go

@@ -1,239 +1,21 @@
 package asm
 
+import (
+	"github.com/cilium/ebpf/internal"
+)
+
 //go:generate go run golang.org/x/tools/cmd/stringer@latest -output func_string.go -type=BuiltinFunc
 
 // BuiltinFunc is a built-in eBPF function.
-type BuiltinFunc int32
+type BuiltinFunc uint32
 
-// eBPF built-in functions
-//
-// You can regenerate this list using the following gawk script:
-//
-//	/FN\(.+\),/ {
-//	  match($1, /\(([a-z_0-9]+),/, r)
-//	  split(r[1], p, "_")
-//	  printf "Fn"
-//	  for (i in p) {
-//	    printf "%s%s", toupper(substr(p[i], 1, 1)), substr(p[i], 2)
-//	  }
-//	  print ""
-//	}
-//
-// The script expects include/uapi/linux/bpf.h as it's input.
-const (
-	FnUnspec BuiltinFunc = iota
-	FnMapLookupElem
-	FnMapUpdateElem
-	FnMapDeleteElem
-	FnProbeRead
-	FnKtimeGetNs
-	FnTracePrintk
-	FnGetPrandomU32
-	FnGetSmpProcessorId
-	FnSkbStoreBytes
-	FnL3CsumReplace
-	FnL4CsumReplace
-	FnTailCall
-	FnCloneRedirect
-	FnGetCurrentPidTgid
-	FnGetCurrentUidGid
-	FnGetCurrentComm
-	FnGetCgroupClassid
-	FnSkbVlanPush
-	FnSkbVlanPop
-	FnSkbGetTunnelKey
-	FnSkbSetTunnelKey
-	FnPerfEventRead
-	FnRedirect
-	FnGetRouteRealm
-	FnPerfEventOutput
-	FnSkbLoadBytes
-	FnGetStackid
-	FnCsumDiff
-	FnSkbGetTunnelOpt
-	FnSkbSetTunnelOpt
-	FnSkbChangeProto
-	FnSkbChangeType
-	FnSkbUnderCgroup
-	FnGetHashRecalc
-	FnGetCurrentTask
-	FnProbeWriteUser
-	FnCurrentTaskUnderCgroup
-	FnSkbChangeTail
-	FnSkbPullData
-	FnCsumUpdate
-	FnSetHashInvalid
-	FnGetNumaNodeId
-	FnSkbChangeHead
-	FnXdpAdjustHead
-	FnProbeReadStr
-	FnGetSocketCookie
-	FnGetSocketUid
-	FnSetHash
-	FnSetsockopt
-	FnSkbAdjustRoom
-	FnRedirectMap
-	FnSkRedirectMap
-	FnSockMapUpdate
-	FnXdpAdjustMeta
-	FnPerfEventReadValue
-	FnPerfProgReadValue
-	FnGetsockopt
-	FnOverrideReturn
-	FnSockOpsCbFlagsSet
-	FnMsgRedirectMap
-	FnMsgApplyBytes
-	FnMsgCorkBytes
-	FnMsgPullData
-	FnBind
-	FnXdpAdjustTail
-	FnSkbGetXfrmState
-	FnGetStack
-	FnSkbLoadBytesRelative
-	FnFibLookup
-	FnSockHashUpdate
-	FnMsgRedirectHash
-	FnSkRedirectHash
-	FnLwtPushEncap
-	FnLwtSeg6StoreBytes
-	FnLwtSeg6AdjustSrh
-	FnLwtSeg6Action
-	FnRcRepeat
-	FnRcKeydown
-	FnSkbCgroupId
-	FnGetCurrentCgroupId
-	FnGetLocalStorage
-	FnSkSelectReuseport
-	FnSkbAncestorCgroupId
-	FnSkLookupTcp
-	FnSkLookupUdp
-	FnSkRelease
-	FnMapPushElem
-	FnMapPopElem
-	FnMapPeekElem
-	FnMsgPushData
-	FnMsgPopData
-	FnRcPointerRel
-	FnSpinLock
-	FnSpinUnlock
-	FnSkFullsock
-	FnTcpSock
-	FnSkbEcnSetCe
-	FnGetListenerSock
-	FnSkcLookupTcp
-	FnTcpCheckSyncookie
-	FnSysctlGetName
-	FnSysctlGetCurrentValue
-	FnSysctlGetNewValue
-	FnSysctlSetNewValue
-	FnStrtol
-	FnStrtoul
-	FnSkStorageGet
-	FnSkStorageDelete
-	FnSendSignal
-	FnTcpGenSyncookie
-	FnSkbOutput
-	FnProbeReadUser
-	FnProbeReadKernel
-	FnProbeReadUserStr
-	FnProbeReadKernelStr
-	FnTcpSendAck
-	FnSendSignalThread
-	FnJiffies64
-	FnReadBranchRecords
-	FnGetNsCurrentPidTgid
-	FnXdpOutput
-	FnGetNetnsCookie
-	FnGetCurrentAncestorCgroupId
-	FnSkAssign
-	FnKtimeGetBootNs
-	FnSeqPrintf
-	FnSeqWrite
-	FnSkCgroupId
-	FnSkAncestorCgroupId
-	FnRingbufOutput
-	FnRingbufReserve
-	FnRingbufSubmit
-	FnRingbufDiscard
-	FnRingbufQuery
-	FnCsumLevel
-	FnSkcToTcp6Sock
-	FnSkcToTcpSock
-	FnSkcToTcpTimewaitSock
-	FnSkcToTcpRequestSock
-	FnSkcToUdp6Sock
-	FnGetTaskStack
-	FnLoadHdrOpt
-	FnStoreHdrOpt
-	FnReserveHdrOpt
-	FnInodeStorageGet
-	FnInodeStorageDelete
-	FnDPath
-	FnCopyFromUser
-	FnSnprintfBtf
-	FnSeqPrintfBtf
-	FnSkbCgroupClassid
-	FnRedirectNeigh
-	FnPerCpuPtr
-	FnThisCpuPtr
-	FnRedirectPeer
-	FnTaskStorageGet
-	FnTaskStorageDelete
-	FnGetCurrentTaskBtf
-	FnBprmOptsSet
-	FnKtimeGetCoarseNs
-	FnImaInodeHash
-	FnSockFromFile
-	FnCheckMtu
-	FnForEachMapElem
-	FnSnprintf
-	FnSysBpf
-	FnBtfFindByNameKind
-	FnSysClose
-	FnTimerInit
-	FnTimerSetCallback
-	FnTimerStart
-	FnTimerCancel
-	FnGetFuncIp
-	FnGetAttachCookie
-	FnTaskPtRegs
-	FnGetBranchSnapshot
-	FnTraceVprintk
-	FnSkcToUnixSock
-	FnKallsymsLookupName
-	FnFindVma
-	FnLoop
-	FnStrncmp
-	FnGetFuncArg
-	FnGetFuncRet
-	FnGetFuncArgCnt
-	FnGetRetval
-	FnSetRetval
-	FnXdpGetBuffLen
-	FnXdpLoadBytes
-	FnXdpStoreBytes
-	FnCopyFromUserTask
-	FnSkbSetTstamp
-	FnImaFileHash
-	FnKptrXchg
-	FnMapLookupPercpuElem
-	FnSkcToMptcpSock
-	FnDynptrFromMem
-	FnRingbufReserveDynptr
-	FnRingbufSubmitDynptr
-	FnRingbufDiscardDynptr
-	FnDynptrRead
-	FnDynptrWrite
-	FnDynptrData
-	FnTcpRawGenSyncookieIpv4
-	FnTcpRawGenSyncookieIpv6
-	FnTcpRawCheckSyncookieIpv4
-	FnTcpRawCheckSyncookieIpv6
-	FnKtimeGetTaiNs
-	FnUserRingbufDrain
-	FnCgrpStorageGet
-	FnCgrpStorageDelete
-)
+func BuiltinFuncForPlatform(platform string, value uint32) (BuiltinFunc, error) {
+	return internal.EncodePlatformConstant[BuiltinFunc](platform, value)
+}
+
+func (fn BuiltinFunc) Decode() (string, uint32) {
+	return internal.DecodePlatformConstant(fn)
+}
 
 // Call emits a function call.
 func (fn BuiltinFunc) Call() Instruction {