diff options
| author | Ian Lance Taylor <iant@golang.org> | 2025-11-13 13:01:14 -0800 |
|---|---|---|
| committer | Ian Lance Taylor <iant@golang.org> | 2025-11-26 20:06:46 -0800 |
| commit | 43cfd785e72ccd04fe638395aa80029aae23fef6 (patch) | |
| tree | 967647d8ec8190d977368b8a80be1faf0d92bb0f /src/internal | |
| parent | 312b2034a4e16583fac00070e698c3d464eca1c8 (diff) | |
| download | go-43cfd785e72ccd04fe638395aa80029aae23fef6.tar.xz | |
cmd/link, runtime, debug/gosym: move pclntab magic to internal/abi
Change-Id: I2d3c41b0e61b994d7b04bd16a791fd226dc45269
Reviewed-on: https://go-review.googlesource.com/c/go/+/720302
Reviewed-by: Michael Knyszek <mknyszek@google.com>
Reviewed-by: David Chase <drchase@google.com>
Reviewed-by: Cherry Mui <cherryyz@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Diffstat (limited to 'src/internal')
| -rw-r--r-- | src/internal/abi/symtab.go | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/src/internal/abi/symtab.go b/src/internal/abi/symtab.go index 86d6700388..10033e7277 100644 --- a/src/internal/abi/symtab.go +++ b/src/internal/abi/symtab.go @@ -4,6 +4,36 @@ package abi +// PCLnTabMagic is the version at the start of the PC/line table. +// This is the start of the .pclntab section, and is also runtime.pcHeader. +// The magic numbers are chosen such that reading the value with +// a different endianness does not result in the same value. +// That lets us the magic number to determine the endianness. +type PCLnTabMagic uint32 + +const ( + // Initial PCLnTabMagic value used in Go 1.2 through Go 1.15. + Go12PCLnTabMagic PCLnTabMagic = 0xfffffffb + // PCLnTabMagic value used in Go 1.16 through Go 1.17. + // Several fields added to header (CL 241598). + Go116PCLnTabMagic PCLnTabMagic = 0xfffffffa + // PCLnTabMagic value used in Go 1.18 through Go 1.19. + // Entry PC of func data changed from address to offset (CL 351463). + Go118PCLnTabMagic PCLnTabMagic = 0xfffffff0 + // PCLnTabMagic value used in Go 1.20 and later. + // A ":" was added to generated symbol names (#37762). + Go120PCLnTabMagic PCLnTabMagic = 0xfffffff1 + + // CurrentPCLnTabMagic is the value emitted by the current toolchain. + // This is written by the linker to the pcHeader and read by the + // runtime and debug/gosym (and external tools like Delve). + // + // Change this value when updating the pclntab version. + // Changing this exported value is OK because is an + // internal package. + CurrentPCLnTabMagic = Go120PCLnTabMagic +) + // A FuncFlag records bits about a function, passed to the runtime. type FuncFlag uint8 |