debug/elf: define non-standard but well-known symbol types

Fixes #66836

Change-Id: I603faca2acd2bcffabbcaca8b8670d46387d2a5b
Reviewed-on: https://go-review.googlesource.com/c/go/+/578995
Commit-Queue: Ian Lance Taylor <[email protected]>
Reviewed-by: Ian Lance Taylor <[email protected]>
Auto-Submit: Ian Lance Taylor <[email protected]>
LUCI-TryBot-Result: Go LUCI <[email protected]>
Auto-Submit: Ian Lance Taylor <[email protected]>
Reviewed-by: Cherry Mui <[email protected]>

Author: ianlancetaylor

api/next/66836.txt

@@ -0,0 +1,6 @@
+pkg debug/elf, const STT_GNU_IFUNC = 10 #66836
+pkg debug/elf, const STT_GNU_IFUNC SymType #66836
+pkg debug/elf, const STT_RELC = 8 #66836
+pkg debug/elf, const STT_RELC SymType #66836
+pkg debug/elf, const STT_SRELC = 9 #66836
+pkg debug/elf, const STT_SRELC SymType #66836

doc/next/6-stdlib/99-minor/debug/elf/66836.md

@@ -0,0 +1,2 @@
+Now defines the symbol type constants [STT_RELC], [STT_SRELC], and
+[STT_GNU_IFUNC].

src/debug/elf/elf.go

@@ -1287,6 +1287,11 @@ const (
 	STT_HIOS    SymType = 12 /*   specific semantics. */
 	STT_LOPROC  SymType = 13 /* reserved range for processor */
 	STT_HIPROC  SymType = 15 /*   specific semantics. */
+
+	/* Non-standard symbol types. */
+	STT_RELC      SymType = 8  /* Complex relocation expression. */
+	STT_SRELC     SymType = 9  /* Signed complex relocation expression. */
+	STT_GNU_IFUNC SymType = 10 /* Indirect code object. */
 )
 
 var sttStrings = []intName{
@@ -1297,6 +1302,8 @@ var sttStrings = []intName{
 	{4, "STT_FILE"},
 	{5, "STT_COMMON"},
 	{6, "STT_TLS"},
+	{8, "STT_RELC"},
+	{9, "STT_SRELC"},
 	{10, "STT_LOOS"},
 	{12, "STT_HIOS"},
 	{13, "STT_LOPROC"},