mirror of
https://github.com/superseriousbusiness/gotosocial.git
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57dc742c76
Bumps [github.com/KimMachineGun/automemlimit](https://github.com/KimMachineGun/automemlimit) from 0.2.4 to 0.2.5. - [Release notes](https://github.com/KimMachineGun/automemlimit/releases) - [Commits](https://github.com/KimMachineGun/automemlimit/compare/v0.2.4...v0.2.5) --- updated-dependencies: - dependency-name: github.com/KimMachineGun/automemlimit dependency-type: direct:production update-type: version-update:semver-patch ... Signed-off-by: dependabot[bot] <support@github.com> Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
205 lines
4.8 KiB
Go
205 lines
4.8 KiB
Go
package asm
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//go:generate stringer -output load_store_string.go -type=Mode,Size
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// Mode for load and store operations
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//
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// msb lsb
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// +---+--+---+
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// |MDE|sz|cls|
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// +---+--+---+
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type Mode uint8
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const modeMask OpCode = 0xe0
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const (
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// InvalidMode is returned by getters when invoked
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// on non load / store OpCodes
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InvalidMode Mode = 0xff
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// ImmMode - immediate value
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ImmMode Mode = 0x00
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// AbsMode - immediate value + offset
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AbsMode Mode = 0x20
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// IndMode - indirect (imm+src)
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IndMode Mode = 0x40
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// MemMode - load from memory
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MemMode Mode = 0x60
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// XAddMode - add atomically across processors.
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XAddMode Mode = 0xc0
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)
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// Size of load and store operations
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//
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// msb lsb
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// +---+--+---+
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// |mde|SZ|cls|
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// +---+--+---+
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type Size uint8
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const sizeMask OpCode = 0x18
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const (
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// InvalidSize is returned by getters when invoked
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// on non load / store OpCodes
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InvalidSize Size = 0xff
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// DWord - double word; 64 bits
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DWord Size = 0x18
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// Word - word; 32 bits
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Word Size = 0x00
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// Half - half-word; 16 bits
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Half Size = 0x08
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// Byte - byte; 8 bits
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Byte Size = 0x10
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)
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// Sizeof returns the size in bytes.
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func (s Size) Sizeof() int {
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switch s {
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case DWord:
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return 8
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case Word:
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return 4
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case Half:
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return 2
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case Byte:
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return 1
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default:
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return -1
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}
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}
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// LoadMemOp returns the OpCode to load a value of given size from memory.
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func LoadMemOp(size Size) OpCode {
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return OpCode(LdXClass).SetMode(MemMode).SetSize(size)
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}
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// LoadMem emits `dst = *(size *)(src + offset)`.
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func LoadMem(dst, src Register, offset int16, size Size) Instruction {
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return Instruction{
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OpCode: LoadMemOp(size),
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Dst: dst,
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Src: src,
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Offset: offset,
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}
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}
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// LoadImmOp returns the OpCode to load an immediate of given size.
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//
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// As of kernel 4.20, only DWord size is accepted.
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func LoadImmOp(size Size) OpCode {
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return OpCode(LdClass).SetMode(ImmMode).SetSize(size)
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}
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// LoadImm emits `dst = (size)value`.
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//
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// As of kernel 4.20, only DWord size is accepted.
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func LoadImm(dst Register, value int64, size Size) Instruction {
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return Instruction{
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OpCode: LoadImmOp(size),
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Dst: dst,
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Constant: value,
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}
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}
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// LoadMapPtr stores a pointer to a map in dst.
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func LoadMapPtr(dst Register, fd int) Instruction {
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if fd < 0 {
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return Instruction{OpCode: InvalidOpCode}
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}
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return Instruction{
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OpCode: LoadImmOp(DWord),
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Dst: dst,
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Src: PseudoMapFD,
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Constant: int64(uint32(fd)),
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}
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}
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// LoadMapValue stores a pointer to the value at a certain offset of a map.
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func LoadMapValue(dst Register, fd int, offset uint32) Instruction {
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if fd < 0 {
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return Instruction{OpCode: InvalidOpCode}
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}
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fdAndOffset := (uint64(offset) << 32) | uint64(uint32(fd))
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return Instruction{
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OpCode: LoadImmOp(DWord),
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Dst: dst,
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Src: PseudoMapValue,
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Constant: int64(fdAndOffset),
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}
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}
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// LoadIndOp returns the OpCode for loading a value of given size from an sk_buff.
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func LoadIndOp(size Size) OpCode {
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return OpCode(LdClass).SetMode(IndMode).SetSize(size)
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}
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// LoadInd emits `dst = ntoh(*(size *)(((sk_buff *)R6)->data + src + offset))`.
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func LoadInd(dst, src Register, offset int32, size Size) Instruction {
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return Instruction{
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OpCode: LoadIndOp(size),
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Dst: dst,
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Src: src,
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Constant: int64(offset),
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}
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}
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// LoadAbsOp returns the OpCode for loading a value of given size from an sk_buff.
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func LoadAbsOp(size Size) OpCode {
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return OpCode(LdClass).SetMode(AbsMode).SetSize(size)
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}
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// LoadAbs emits `r0 = ntoh(*(size *)(((sk_buff *)R6)->data + offset))`.
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func LoadAbs(offset int32, size Size) Instruction {
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return Instruction{
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OpCode: LoadAbsOp(size),
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Dst: R0,
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Constant: int64(offset),
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}
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}
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// StoreMemOp returns the OpCode for storing a register of given size in memory.
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func StoreMemOp(size Size) OpCode {
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return OpCode(StXClass).SetMode(MemMode).SetSize(size)
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}
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// StoreMem emits `*(size *)(dst + offset) = src`
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func StoreMem(dst Register, offset int16, src Register, size Size) Instruction {
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return Instruction{
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OpCode: StoreMemOp(size),
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Dst: dst,
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Src: src,
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Offset: offset,
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}
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}
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// StoreImmOp returns the OpCode for storing an immediate of given size in memory.
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func StoreImmOp(size Size) OpCode {
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return OpCode(StClass).SetMode(MemMode).SetSize(size)
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}
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// StoreImm emits `*(size *)(dst + offset) = value`.
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func StoreImm(dst Register, offset int16, value int64, size Size) Instruction {
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return Instruction{
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OpCode: StoreImmOp(size),
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Dst: dst,
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Offset: offset,
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Constant: value,
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}
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}
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// StoreXAddOp returns the OpCode to atomically add a register to a value in memory.
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func StoreXAddOp(size Size) OpCode {
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return OpCode(StXClass).SetMode(XAddMode).SetSize(size)
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}
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// StoreXAdd atomically adds src to *dst.
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func StoreXAdd(dst, src Register, size Size) Instruction {
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return Instruction{
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OpCode: StoreXAddOp(size),
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Dst: dst,
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Src: src,
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}
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}
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