mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2024-11-22 02:33:06 +01:00
[yaml2obj/obj2yaml/llvm-readobj] Support SHF_GNU_RETAIN
In binutils, the flag is defined for ELFOSABI_GNU and ELFOSABI_FREEBSD. It can be used to mark a section as a GC root. In practice, the flag has generic semantics and can be applied to many EI_OSABI values, so we consider it generic. Differential Revision: https://reviews.llvm.org/D95728
This commit is contained in:
Fangrui Song
parent
a9c32b94c7
commit
4be3ad3853
@ -949,6 +949,9 @@ enum : unsigned {
|
||||
// Identifies a section containing compressed data.
|
||||
SHF_COMPRESSED = 0x800U,
|
||||
|
||||
// This section should not be garbage collected by the linker.
|
||||
SHF_GNU_RETAIN = 0x200000,
|
||||
|
||||
// This section is excluded from the final executable or shared library.
|
||||
SHF_EXCLUDE = 0x80000000U,
|
||||
|
||||
|
||||
@ -555,6 +555,7 @@ void ScalarBitSetTraits<ELFYAML::ELF_SHF>::bitset(IO &IO,
|
||||
BCase(SHF_GROUP);
|
||||
BCase(SHF_TLS);
|
||||
BCase(SHF_COMPRESSED);
|
||||
BCase(SHF_GNU_RETAIN);
|
||||
switch (Object->getMachine()) {
|
||||
case ELF::EM_ARM:
|
||||
BCase(SHF_ARM_PURECODE);
|
||||
|
||||
@ -23,7 +23,7 @@
|
||||
# ELF32-NEXT: W (write), A (alloc), X (execute), M (merge), S (strings), I (info),
|
||||
# ELF32-NEXT: L (link order), O (extra OS processing required), G (group), T (TLS),
|
||||
# ELF32-NEXT: C (compressed), x (unknown), o (OS specific), E (exclude),
|
||||
# ELF32-NEXT: p (processor specific)
|
||||
# ELF32-NEXT: R (retain), p (processor specific)
|
||||
|
||||
--- !ELF
|
||||
FileHeader:
|
||||
@ -97,7 +97,7 @@ Symbols:
|
||||
# ELF64-NEXT: W (write), A (alloc), X (execute), M (merge), S (strings), I (info),
|
||||
# ELF64-NEXT: L (link order), O (extra OS processing required), G (group), T (TLS),
|
||||
# ELF64-NEXT: C (compressed), x (unknown), o (OS specific), E (exclude),
|
||||
# ELF64-NEXT: l (large), p (processor specific)
|
||||
# ELF64-NEXT: R (retain), l (large), p (processor specific)
|
||||
|
||||
## For an EM_ARM target we print "y" for the SHF_ARM_PURECODE section flag.
|
||||
## Check we mention it in the flag key.
|
||||
@ -109,4 +109,4 @@ Symbols:
|
||||
# ARM-NEXT: W (write), A (alloc), X (execute), M (merge), S (strings), I (info),
|
||||
# ARM-NEXT: L (link order), O (extra OS processing required), G (group), T (TLS),
|
||||
# ARM-NEXT: C (compressed), x (unknown), o (OS specific), E (exclude),
|
||||
# ARM-NEXT: y (purecode), p (processor specific)
|
||||
# ARM-NEXT: R (retain), y (purecode), p (processor specific)
|
||||
|
||||
@ -11,10 +11,12 @@
|
||||
# OS-PROC-LLVM: Name: .os.flags.high
|
||||
# OS-PROC-LLVM-NEXT: Type: SHT_PROGBITS
|
||||
# OS-PROC-LLVM-NEXT: Flags [ (0xFE00000)
|
||||
# OS-PROC-LLVM-NEXT: SHF_GNU_RETAIN (0x200000)
|
||||
# OS-PROC-LLVM-NEXT: ]
|
||||
# OS-PROC-LLVM: Name: .os.flags.mask
|
||||
# OS-PROC-LLVM-NEXT: Type: SHT_PROGBITS
|
||||
# OS-PROC-LLVM-NEXT: Flags [ (0xFF00000)
|
||||
# OS-PROC-LLVM-NEXT: SHF_GNU_RETAIN (0x200000)
|
||||
# OS-PROC-LLVM-NEXT: ]
|
||||
# OS-PROC-LLVM: Name: .proc.flags.low
|
||||
# OS-PROC-LLVM-NEXT: Type: SHT_PROGBITS
|
||||
@ -38,11 +40,13 @@
|
||||
# OS-PROC-LLVM-NEXT: Type: SHT_PROGBITS
|
||||
# OS-PROC-LLVM-NEXT: Flags [ (0xEFE00000)
|
||||
# OS-PROC-LLVM-NEXT: SHF_EXCLUDE (0x80000000)
|
||||
# OS-PROC-LLVM-NEXT: SHF_GNU_RETAIN (0x200000)
|
||||
# OS-PROC-LLVM-NEXT: ]
|
||||
# OS-PROC-LLVM: Name: .both.flags.mask
|
||||
# OS-PROC-LLVM-NEXT: Type: SHT_PROGBITS
|
||||
# OS-PROC-LLVM-NEXT: Flags [ (0xFFF00000)
|
||||
# OS-PROC-LLVM-NEXT: SHF_EXCLUDE (0x80000000)
|
||||
# OS-PROC-LLVM-NEXT: SHF_GNU_RETAIN (0x200000)
|
||||
# OS-PROC-LLVM-NEXT: ]
|
||||
# OS-PROC-LLVM: Name: .exclude
|
||||
# OS-PROC-LLVM-NEXT: Type: SHT_PROGBITS
|
||||
@ -56,6 +60,7 @@
|
||||
# OS-PROC-LLVM-NEXT: SHF_COMPRESSED (0x800)
|
||||
# OS-PROC-LLVM-NEXT: SHF_EXCLUDE (0x80000000)
|
||||
# OS-PROC-LLVM-NEXT: SHF_EXECINSTR (0x4)
|
||||
# OS-PROC-LLVM-NEXT: SHF_GNU_RETAIN (0x200000)
|
||||
# OS-PROC-LLVM-NEXT: SHF_GROUP (0x200)
|
||||
# OS-PROC-LLVM-NEXT: SHF_INFO_LINK (0x40)
|
||||
# OS-PROC-LLVM-NEXT: SHF_LINK_ORDER (0x80)
|
||||
@ -70,13 +75,13 @@
|
||||
# OS-PROC-GNU-NEXT: [Nr] Name Type Address Off Size ES Flg Lk Inf Al
|
||||
# OS-PROC-GNU-NEXT: [ 0] NULL 0000000000000000 000000 000000 00 0 0 0
|
||||
# OS-PROC-GNU-NEXT: [ 1] .os.flags.low PROGBITS 0000000000000000 000040 000000 00 o 0 0 0
|
||||
# OS-PROC-GNU-NEXT: [ 2] .os.flags.high PROGBITS 0000000000000000 000040 000000 00 o 0 0 0
|
||||
# OS-PROC-GNU-NEXT: [ 2] .os.flags.high PROGBITS 0000000000000000 000040 000000 00 Ro 0 0 0
|
||||
# OS-PROC-GNU-NEXT: [ 3] .os.flags.mask PROGBITS 0000000000000000 000040 000000 00 o 0 0 0
|
||||
# OS-PROC-GNU-NEXT: [ 4] .proc.flags.low PROGBITS 0000000000000000 000040 000000 00 p 0 0 0
|
||||
# OS-PROC-GNU-NEXT: [ 5] .proc.flags.high PROGBITS 0000000000000000 000040 000000 00 p 0 0 0
|
||||
# OS-PROC-GNU-NEXT: [ 6] .proc.flags.mask PROGBITS 0000000000000000 000040 000000 00 p 0 0 0
|
||||
# OS-PROC-GNU-NEXT: [ 7] .both.flags.low PROGBITS 0000000000000000 000040 000000 00 op 0 0 0
|
||||
# OS-PROC-GNU-NEXT: [ 8] .both.flags.high PROGBITS 0000000000000000 000040 000000 00 op 0 0 0
|
||||
# OS-PROC-GNU-NEXT: [ 8] .both.flags.high PROGBITS 0000000000000000 000040 000000 00 Rop 0 0 0
|
||||
# OS-PROC-GNU-NEXT: [ 9] .both.flags.mask PROGBITS 0000000000000000 000040 000000 00 op 0 0 0
|
||||
# OS-PROC-GNU-NEXT: [10] .exclude PROGBITS 0000000000000000 000040 000000 00 E 0 0 0
|
||||
# OS-PROC-GNU-NEXT: [11] .all.possible PROGBITS 0000000000000000 000040 000000 00 WAXMSILOGTCopx 0 0 0
|
||||
|
||||
@ -6,11 +6,12 @@
|
||||
|
||||
# LLVM: Name: allflags
|
||||
# LLVM-NEXT: Type: SHT_PROGBITS
|
||||
# LLVM-NEXT: Flags [ (0x80000FF7)
|
||||
# LLVM-NEXT: Flags [ (0x80200FF7)
|
||||
# LLVM-NEXT: SHF_ALLOC (0x2)
|
||||
# LLVM-NEXT: SHF_COMPRESSED (0x800)
|
||||
# LLVM-NEXT: SHF_EXCLUDE (0x80000000)
|
||||
# LLVM-NEXT: SHF_EXECINSTR (0x4)
|
||||
# LLVM-NEXT: SHF_GNU_RETAIN (0x200000)
|
||||
# LLVM-NEXT: SHF_GROUP (0x200)
|
||||
# LLVM-NEXT: SHF_INFO_LINK (0x40)
|
||||
# LLVM-NEXT: SHF_LINK_ORDER (0x80)
|
||||
@ -92,6 +93,14 @@
|
||||
# LLVM-NEXT: SHF_COMPRESSED (0x800)
|
||||
# LLVM-NEXT: ]
|
||||
|
||||
## SHF_GNU_RETAIN is defined in the OS-specific range, but we treat it generic
|
||||
## and allow it to be used with OSABI values other than GNU and FREEBSD.
|
||||
# LLVM: Name: retain
|
||||
# LLVM-NEXT: Type: SHT_PROGBITS
|
||||
# LLVM-NEXT: Flags [ (0x200000)
|
||||
# LLVM-NEXT: SHF_GNU_RETAIN (0x200000)
|
||||
# LLVM-NEXT: ]
|
||||
|
||||
# LLVM: Name: exclude
|
||||
# LLVM-NEXT: Type: SHT_PROGBITS
|
||||
# LLVM-NEXT: Flags [ (0x80000000)
|
||||
@ -104,7 +113,7 @@
|
||||
# LLVM-NEXT: ]
|
||||
|
||||
# GNU: [Nr] Name Type Address Off Size ES Flg Lk Inf Al
|
||||
# GNU: [ 1] allflags PROGBITS 0000000000000000 000040 000000 00 WAXMSILOGTCE 0 0 0
|
||||
# GNU: [ 1] allflags PROGBITS 0000000000000000 000040 000000 00 WAXMSILOGTCRE 0 0 0
|
||||
# GNU: [ 2] noflags PROGBITS 0000000000000000 000040 000000 00 0 0 0
|
||||
# GNU: [ 3] write PROGBITS 0000000000000000 000040 000000 00 W 0 0 0
|
||||
# GNU: [ 4] alloc PROGBITS 0000000000000000 000040 000000 00 A 0 0 0
|
||||
@ -117,8 +126,9 @@
|
||||
# GNU: [11] group PROGBITS 0000000000000000 000040 000000 00 G 0 0 0
|
||||
# GNU: [12] tls PROGBITS 0000000000000000 000040 000000 00 T 0 0 0
|
||||
# GNU: [13] compressed PROGBITS 0000000000000000 000040 000000 00 C 0 0 0
|
||||
# GNU: [14] exclude PROGBITS 0000000000000000 000040 000000 00 E 0 0 0
|
||||
# GNU: [15] unknown PROGBITS 0000000000000000 000040 000000 00 x 0 0 0
|
||||
# GNU: [14] retain PROGBITS 0000000000000000 000040 000000 00 R 0 0 0
|
||||
# GNU: [15] exclude PROGBITS 0000000000000000 000040 000000 00 E 0 0 0
|
||||
# GNU: [16] unknown PROGBITS 0000000000000000 000040 000000 00 x 0 0 0
|
||||
|
||||
--- !ELF
|
||||
FileHeader:
|
||||
@ -131,7 +141,7 @@ Sections:
|
||||
Type: SHT_PROGBITS
|
||||
Flags: [ SHF_WRITE, SHF_ALLOC, SHF_EXECINSTR, SHF_MERGE,
|
||||
SHF_STRINGS, SHF_INFO_LINK, SHF_LINK_ORDER, SHF_OS_NONCONFORMING,
|
||||
SHF_GROUP, SHF_TLS, SHF_COMPRESSED, SHF_EXCLUDE ]
|
||||
SHF_GROUP, SHF_TLS, SHF_COMPRESSED, SHF_GNU_RETAIN, SHF_EXCLUDE ]
|
||||
- Name: noflags
|
||||
Type: SHT_PROGBITS
|
||||
Flags: [ ]
|
||||
@ -168,6 +178,9 @@ Sections:
|
||||
- Name: compressed
|
||||
Type: SHT_PROGBITS
|
||||
Flags: [ SHF_COMPRESSED ]
|
||||
- Name: retain
|
||||
Type: SHT_PROGBITS
|
||||
Flags: [ SHF_GNU_RETAIN ]
|
||||
- Name: exclude
|
||||
Type: SHT_PROGBITS
|
||||
Flags: [ SHF_EXCLUDE ]
|
||||
|
||||
@ -1201,6 +1201,7 @@ static const EnumEntry<unsigned> ElfSectionFlags[] = {
|
||||
ENUM_ENT(SHF_GROUP, "G"),
|
||||
ENUM_ENT(SHF_TLS, "T"),
|
||||
ENUM_ENT(SHF_COMPRESSED, "C"),
|
||||
ENUM_ENT(SHF_GNU_RETAIN, "R"),
|
||||
ENUM_ENT(SHF_EXCLUDE, "E"),
|
||||
};
|
||||
|
||||
@ -3483,15 +3484,14 @@ static void printSectionDescription(formatted_raw_ostream &OS,
|
||||
OS << " L (link order), O (extra OS processing required), G (group), T "
|
||||
"(TLS),\n";
|
||||
OS << " C (compressed), x (unknown), o (OS specific), E (exclude),\n";
|
||||
OS << " R (retain)";
|
||||
|
||||
if (EMachine == EM_X86_64)
|
||||
OS << " l (large), ";
|
||||
OS << ", l (large)";
|
||||
else if (EMachine == EM_ARM)
|
||||
OS << " y (purecode), ";
|
||||
else
|
||||
OS << " ";
|
||||
OS << ", y (purecode)";
|
||||
|
||||
OS << "p (processor specific)\n";
|
||||
OS << ", p (processor specific)\n";
|
||||
}
|
||||
|
||||
template <class ELFT> void GNUELFDumper<ELFT>::printSectionHeaders() {
|
||||
|
||||
Loading…
Reference in New Issue
Block a user