debug/elf: add DT_FLAGS_1 constants

Add constants for all ELF dynamic flags (pertaining to DT_FLAGS_1). This will help, for example, determining whether an object is a position-independent executable (PIE). The constants are defined according to Table 15-10 in https://docs.oracle.com/en/operating-systems/solaris/oracle-solaris/11.4/linkers-libraries/dynamic-section.html.

Fixes #56887

Change-Id: I6cd501af50d9dbcc2aa8a9a002e12c6fb6726761
Reviewed-on: https://go-review.googlesource.com/c/go/+/452496
Reviewed-by: Ian Lance Taylor <iant@google.com>
Run-TryBot: Ian Lance Taylor <iant@google.com>
Auto-Submit: Ian Lance Taylor <iant@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>

3 files changed, 184 insertions, 0 deletions

diff --git a/api/next/56887.txt b/api/next/56887.txt
new file mode 100644
index 0000000000..87788be4c8
--- /dev/null
+++ b/api/next/56887.txt
@@ -0,0 +1,65 @@
+pkg debug/elf, const DF_1_GLOBAL = 2 #56887
+pkg debug/elf, const DF_1_GLOBAL DynFlag1 #56887
+pkg debug/elf, const DF_1_DIRECT = 256 #56887
+pkg debug/elf, const DF_1_DIRECT DynFlag1 #56887
+pkg debug/elf, const DF_1_TRANS = 512 #56887
+pkg debug/elf, const DF_1_TRANS DynFlag1 #56887
+pkg debug/elf, const DF_1_NODUMP = 4096 #56887
+pkg debug/elf, const DF_1_NODUMP DynFlag1 #56887
+pkg debug/elf, const DF_1_CONFALT = 8192 #56887
+pkg debug/elf, const DF_1_CONFALT DynFlag1 #56887
+pkg debug/elf, const DF_1_DISPRELDNE = 32768 #56887
+pkg debug/elf, const DF_1_DISPRELDNE DynFlag1 #56887
+pkg debug/elf, const DF_1_DISPRELPND = 65536 #56887
+pkg debug/elf, const DF_1_DISPRELPND DynFlag1 #56887
+pkg debug/elf, const DF_1_IGNMULDEF = 262144 #56887
+pkg debug/elf, const DF_1_IGNMULDEF DynFlag1 #56887
+pkg debug/elf, const DF_1_NOKSYMS = 524288 #56887
+pkg debug/elf, const DF_1_NOKSYMS DynFlag1 #56887
+pkg debug/elf, const DF_1_NOHDR = 1048576 #56887
+pkg debug/elf, const DF_1_NOHDR DynFlag1 #56887
+pkg debug/elf, const DF_1_EDITED = 2097152 #56887
+pkg debug/elf, const DF_1_EDITED DynFlag1 #56887
+pkg debug/elf, const DF_1_NORELOC = 4194304 #56887
+pkg debug/elf, const DF_1_NORELOC DynFlag1 #56887
+pkg debug/elf, const DF_1_ENDFILTEE = 16384 #56887
+pkg debug/elf, const DF_1_ENDFILTEE DynFlag1 #56887
+pkg debug/elf, const DF_1_GLOBAUDIT = 16777216 #56887
+pkg debug/elf, const DF_1_GLOBAUDIT DynFlag1 #56887
+pkg debug/elf, const DF_1_GROUP = 4 #56887
+pkg debug/elf, const DF_1_GROUP DynFlag1 #56887
+pkg debug/elf, const DF_1_INITFIRST = 32 #56887
+pkg debug/elf, const DF_1_INITFIRST DynFlag1 #56887
+pkg debug/elf, const DF_1_INTERPOSE = 1024 #56887
+pkg debug/elf, const DF_1_INTERPOSE DynFlag1 #56887
+pkg debug/elf, const DF_1_KMOD = 268435456 #56887
+pkg debug/elf, const DF_1_KMOD DynFlag1 #56887
+pkg debug/elf, const DF_1_LOADFLTR = 16 #56887
+pkg debug/elf, const DF_1_LOADFLTR DynFlag1 #56887
+pkg debug/elf, const DF_1_NODEFLIB = 2048 #56887
+pkg debug/elf, const DF_1_NODEFLIB DynFlag1 #56887
+pkg debug/elf, const DF_1_NODELETE = 8 #56887
+pkg debug/elf, const DF_1_NODELETE DynFlag1 #56887
+pkg debug/elf, const DF_1_NODIRECT = 131072 #56887
+pkg debug/elf, const DF_1_NODIRECT DynFlag1 #56887
+pkg debug/elf, const DF_1_NOOPEN = 64 #56887
+pkg debug/elf, const DF_1_NOOPEN DynFlag1 #56887
+pkg debug/elf, const DF_1_NOW = 1 #56887
+pkg debug/elf, const DF_1_NOW DynFlag1 #56887
+pkg debug/elf, const DF_1_ORIGIN = 128 #56887
+pkg debug/elf, const DF_1_ORIGIN DynFlag1 #56887
+pkg debug/elf, const DF_1_PIE = 134217728 #56887
+pkg debug/elf, const DF_1_PIE DynFlag1 #56887
+pkg debug/elf, const DF_1_SINGLETON = 33554432 #56887
+pkg debug/elf, const DF_1_SINGLETON DynFlag1 #56887
+pkg debug/elf, const DF_1_STUB = 67108864 #56887
+pkg debug/elf, const DF_1_STUB DynFlag1 #56887
+pkg debug/elf, const DF_1_SYMINTPOSE = 8388608 #56887
+pkg debug/elf, const DF_1_SYMINTPOSE DynFlag1 #56887
+pkg debug/elf, const DF_1_WEAKFILTER = 536870912 #56887
+pkg debug/elf, const DF_1_WEAKFILTER DynFlag1 #56887
+pkg debug/elf, const DF_1_NOCOMMON = 1073741824 #56887
+pkg debug/elf, const DF_1_NOCOMMON DynFlag1 #56887
+pkg debug/elf, method (DynFlag1) GoString() string #56887
+pkg debug/elf, method (DynFlag1) String() string #56887
+pkg debug/elf, type DynFlag1 uint32 #56887
diff --git a/src/debug/elf/elf.go b/src/debug/elf/elf.go
index 02cda16510..ccb7e5a893 100644
--- a/src/debug/elf/elf.go
+++ b/src/debug/elf/elf.go
@@ -1107,6 +1107,124 @@ var dflagStrings = []intName{
 func (i DynFlag) String() string   { return flagName(uint32(i), dflagStrings, false) }
 func (i DynFlag) GoString() string { return flagName(uint32(i), dflagStrings, true) }
 
+// DT_FLAGS_1 values.
+type DynFlag1 uint32
+
+const (
+	// Indicates that all relocations for this object must be processed before
+	// returning control to the program.
+	DF_1_NOW DynFlag1 = 0x00000001
+	// Unused.
+	DF_1_GLOBAL DynFlag1 = 0x00000002
+	// Indicates that the object is a member of a group.
+	DF_1_GROUP DynFlag1 = 0x00000004
+	// Indicates that the object cannot be deleted from a process.
+	DF_1_NODELETE DynFlag1 = 0x00000008
+	// Meaningful only for filters. Indicates that all associated filtees be
+	// processed immediately.
+	DF_1_LOADFLTR DynFlag1 = 0x00000010
+	// Indicates that this object's initialization section be run before any other
+	// objects loaded.
+	DF_1_INITFIRST DynFlag1 = 0x00000020
+	// Indicates that the object cannot be added to a running process with dlopen.
+	DF_1_NOOPEN DynFlag1 = 0x00000040
+	// Indicates the object requires $ORIGIN processing.
+	DF_1_ORIGIN DynFlag1 = 0x00000080
+	// Indicates that the object should use direct binding information.
+	DF_1_DIRECT DynFlag1 = 0x00000100
+	// Unused.
+	DF_1_TRANS DynFlag1 = 0x00000200
+	// Indicates that the objects symbol table is to interpose before all symbols
+	// except the primary load object, which is typically the executable.
+	DF_1_INTERPOSE DynFlag1 = 0x00000400
+	// Indicates that the search for dependencies of this object ignores any
+	// default library search paths.
+	DF_1_NODEFLIB DynFlag1 = 0x00000800
+	// Indicates that this object is not dumped by dldump. Candidates are objects
+	// with no relocations that might get included when generating alternative
+	// objects using.
+	DF_1_NODUMP DynFlag1 = 0x00001000
+	// Identifies this object as a configuration alternative object generated by
+	// crle. Triggers the runtime linker to search for a configuration file $ORIGIN/ld.config.app-name.
+	DF_1_CONFALT DynFlag1 = 0x00002000
+	// Meaningful only for filtees. Terminates a filters search for any
+	// further filtees.
+	DF_1_ENDFILTEE DynFlag1 = 0x00004000
+	// Indicates that this object has displacement relocations applied.
+	DF_1_DISPRELDNE DynFlag1 = 0x00008000
+	// Indicates that this object has displacement relocations pending.
+	DF_1_DISPRELPND DynFlag1 = 0x00010000
+	// Indicates that this object contains symbols that cannot be directly
+	// bound to.
+	DF_1_NODIRECT DynFlag1 = 0x00020000
+	// Reserved for internal use by the kernel runtime-linker.
+	DF_1_IGNMULDEF DynFlag1 = 0x00040000
+	// Reserved for internal use by the kernel runtime-linker.
+	DF_1_NOKSYMS DynFlag1 = 0x00080000
+	// Reserved for internal use by the kernel runtime-linker.
+	DF_1_NOHDR DynFlag1 = 0x00100000
+	// Indicates that this object has been edited or has been modified since the
+	// objects original construction by the link-editor.
+	DF_1_EDITED DynFlag1 = 0x00200000
+	// Reserved for internal use by the kernel runtime-linker.
+	DF_1_NORELOC DynFlag1 = 0x00400000
+	// Indicates that the object contains individual symbols that should interpose
+	// before all symbols except the primary load object, which is typically the
+	// executable.
+	DF_1_SYMINTPOSE DynFlag1 = 0x00800000
+	// Indicates that the executable requires global auditing.
+	DF_1_GLOBAUDIT DynFlag1 = 0x01000000
+	// Indicates that the object defines, or makes reference to singleton symbols.
+	DF_1_SINGLETON DynFlag1 = 0x02000000
+	// Indicates that the object is a stub.
+	DF_1_STUB DynFlag1 = 0x04000000
+	// Indicates that the object is a position-independent executable.
+	DF_1_PIE DynFlag1 = 0x08000000
+	// Indicates that the object is a kernel module.
+	DF_1_KMOD DynFlag1 = 0x10000000
+	// Indicates that the object is a weak standard filter.
+	DF_1_WEAKFILTER DynFlag1 = 0x20000000
+	// Unused.
+	DF_1_NOCOMMON DynFlag1 = 0x40000000
+)
+
+var dflag1Strings = []intName{
+	{0x00000001, "DF_1_NOW"},
+	{0x00000002, "DF_1_GLOBAL"},
+	{0x00000004, "DF_1_GROUP"},
+	{0x00000008, "DF_1_NODELETE"},
+	{0x00000010, "DF_1_LOADFLTR"},
+	{0x00000020, "DF_1_INITFIRST"},
+	{0x00000040, "DF_1_NOOPEN"},
+	{0x00000080, "DF_1_ORIGIN"},
+	{0x00000100, "DF_1_DIRECT"},
+	{0x00000200, "DF_1_TRANS"},
+	{0x00000400, "DF_1_INTERPOSE"},
+	{0x00000800, "DF_1_NODEFLIB"},
+	{0x00001000, "DF_1_NODUMP"},
+	{0x00002000, "DF_1_CONFALT"},
+	{0x00004000, "DF_1_ENDFILTEE"},
+	{0x00008000, "DF_1_DISPRELDNE"},
+	{0x00010000, "DF_1_DISPRELPND"},
+	{0x00020000, "DF_1_NODIRECT"},
+	{0x00040000, "DF_1_IGNMULDEF"},
+	{0x00080000, "DF_1_NOKSYMS"},
+	{0x00100000, "DF_1_NOHDR"},
+	{0x00200000, "DF_1_EDITED"},
+	{0x00400000, "DF_1_NORELOC"},
+	{0x00800000, "DF_1_SYMINTPOSE"},
+	{0x01000000, "DF_1_GLOBAUDIT"},
+	{0x02000000, "DF_1_SINGLETON"},
+	{0x04000000, "DF_1_STUB"},
+	{0x08000000, "DF_1_PIE"},
+	{0x10000000, "DF_1_KMOD"},
+	{0x20000000, "DF_1_WEAKFILTER"},
+	{0x40000000, "DF_1_NOCOMMON"},
+}
+
+func (i DynFlag1) String() string   { return flagName(uint32(i), dflag1Strings, false) }
+func (i DynFlag1) GoString() string { return flagName(uint32(i), dflag1Strings, true) }
+
 // NType values; used in core files.
 type NType int
 
diff --git a/src/debug/elf/elf_test.go b/src/debug/elf/elf_test.go
index 814c6bd6cc..623a4147a7 100644
--- a/src/debug/elf/elf_test.go
+++ b/src/debug/elf/elf_test.go
@@ -25,6 +25,7 @@ var nameTests = []nameTest{
 	{PF_W + PF_R + 0x50, "PF_W+PF_R+0x50"},
 	{DT_SYMBOLIC, "DT_SYMBOLIC"},
 	{DF_BIND_NOW, "DF_BIND_NOW"},
+	{DF_1_PIE, "DF_1_PIE"},
 	{NT_FPREGSET, "NT_FPREGSET"},
 	{STB_GLOBAL, "STB_GLOBAL"},
 	{STT_COMMON, "STT_COMMON"},