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internal/xcoff: use unsigned integers in file structs to avoid negati…
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…ve values

Fixes #58137
Updates #54584

Change-Id: Ifeee1be22051b842e0707d1907dbfa58bfeb336b
GitHub-Last-Rev: 9768e7c
GitHub-Pull-Request: #58164
Reviewed-on: https://go-review.googlesource.com/c/go/+/464336
Reviewed-by: Ayappan Perumal <ayappanec@gmail.com>
Reviewed-by: Lynn Boger <laboger@linux.vnet.ibm.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: David Chase <drchase@google.com>
Reviewed-by: Ian Lance Taylor <iant@google.com>
Run-TryBot: Ian Lance Taylor <iant@google.com>
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@AlexanderYastrebov @laboger
AlexanderYastrebov authored and laboger committed Feb 8, 2023
1 parent bb6952f commit 9d81ccb
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Showing 2 changed files with 32 additions and 38 deletions.
14 changes: 4 additions & 10 deletions src/internal/xcoff/file.go
View file
Original file line number Diff line number Diff line change
Expand Up @@ -173,7 +173,7 @@ func NewFile(r io.ReaderAt) (*File, error) {
}
var nscns uint16
var symptr uint64
var nsyms int32
var nsyms uint32
var opthdr uint16
var hdrsz int
switch f.TargetMachine {
Expand Down Expand Up @@ -283,9 +283,6 @@ func NewFile(r io.ReaderAt) (*File, error) {
return nil, err
}
numaux = int(se.Nnumaux)
if numaux < 0 {
return nil, fmt.Errorf("malformed symbol table, invalid number of aux symbols")
}
sym.SectionNumber = int(se.Nscnum)
sym.StorageClass = int(se.Nsclass)
sym.Value = uint64(se.Nvalue)
Expand All @@ -306,9 +303,6 @@ func NewFile(r io.ReaderAt) (*File, error) {
return nil, err
}
numaux = int(se.Nnumaux)
if numaux < 0 {
return nil, fmt.Errorf("malformed symbol table, invalid number of aux symbols")
}
sym.SectionNumber = int(se.Nscnum)
sym.StorageClass = int(se.Nsclass)
sym.Value = se.Nvalue
Expand Down Expand Up @@ -517,7 +511,7 @@ func (f *File) readImportIDs(s *Section) ([]string, error) {
return nil, err
}
var istlen uint32
var nimpid int32
var nimpid uint32
var impoff uint64
switch f.TargetMachine {
case U802TOCMAGIC:
Expand Down Expand Up @@ -587,7 +581,7 @@ func (f *File) ImportedSymbols() ([]ImportedSymbol, error) {
}
var stlen uint32
var stoff uint64
var nsyms int32
var nsyms uint32
var symoff uint64
switch f.TargetMachine {
case U802TOCMAGIC:
Expand Down Expand Up @@ -632,7 +626,7 @@ func (f *File) ImportedSymbols() ([]ImportedSymbol, error) {
all := make([]ImportedSymbol, 0)
for i := 0; i < int(nsyms); i++ {
var name string
var ifile int32
var ifile uint32
var ok bool
switch f.TargetMachine {
case U802TOCMAGIC:
Expand Down
56 changes: 28 additions & 28 deletions src/internal/xcoff/xcoff.go
View file
Original file line number Diff line number Diff line change
Expand Up @@ -8,21 +8,21 @@ package xcoff
type FileHeader32 struct {
Fmagic uint16 // Target machine
Fnscns uint16 // Number of sections
Ftimedat int32 // Time and date of file creation
Ftimedat uint32 // Time and date of file creation
Fsymptr uint32 // Byte offset to symbol table start
Fnsyms int32 // Number of entries in symbol table
Fnsyms uint32 // Number of entries in symbol table
Fopthdr uint16 // Number of bytes in optional header
Fflags uint16 // Flags
}

type FileHeader64 struct {
Fmagic uint16 // Target machine
Fnscns uint16 // Number of sections
Ftimedat int32 // Time and date of file creation
Ftimedat uint32 // Time and date of file creation
Fsymptr uint64 // Byte offset to symbol table start
Fopthdr uint16 // Number of bytes in optional header
Fflags uint16 // Flags
Fnsyms int32 // Number of entries in symbol table
Fnsyms uint32 // Number of entries in symbol table
}

const (
Expand Down Expand Up @@ -109,19 +109,19 @@ const (
type SymEnt32 struct {
Nname [8]byte // Symbol name
Nvalue uint32 // Symbol value
Nscnum int16 // Section number of symbol
Nscnum uint16 // Section number of symbol
Ntype uint16 // Basic and derived type specification
Nsclass int8 // Storage class of symbol
Nnumaux int8 // Number of auxiliary entries
Nsclass uint8 // Storage class of symbol
Nnumaux uint8 // Number of auxiliary entries
}

type SymEnt64 struct {
Nvalue uint64 // Symbol value
Noffset uint32 // Offset of the name in string table or .debug section
Nscnum int16 // Section number of symbol
Nscnum uint16 // Section number of symbol
Ntype uint16 // Basic and derived type specification
Nsclass int8 // Storage class of symbol
Nnumaux int8 // Number of auxiliary entries
Nsclass uint8 // Storage class of symbol
Nnumaux uint8 // Number of auxiliary entries
}

const SYMESZ = 18
Expand Down Expand Up @@ -203,7 +203,7 @@ type AuxSect64 struct {

// csect Auxiliary Entry.
type AuxCSect32 struct {
Xscnlen int32 // Length or symbol table index
Xscnlen uint32 // Length or symbol table index
Xparmhash uint32 // Offset of parameter type-check string
Xsnhash uint16 // .typchk section number
Xsmtyp uint8 // Symbol alignment and type
Expand All @@ -218,7 +218,7 @@ type AuxCSect64 struct {
Xsnhash uint16 // .typchk section number
Xsmtyp uint8 // Symbol alignment and type
Xsmclas uint8 // Storage-mapping class
Xscnlenhi int32 // Upper 4 bytes of length or symbol table index
Xscnlenhi uint32 // Upper 4 bytes of length or symbol table index
Xpad uint8 // Unused
Xauxtype uint8 // Type of auxiliary entry
}
Expand Down Expand Up @@ -274,22 +274,22 @@ const (

// Loader Header.
type LoaderHeader32 struct {
Lversion int32 // Loader section version number
Lnsyms int32 // Number of symbol table entries
Lnreloc int32 // Number of relocation table entries
Lversion uint32 // Loader section version number
Lnsyms uint32 // Number of symbol table entries
Lnreloc uint32 // Number of relocation table entries
Listlen uint32 // Length of import file ID string table
Lnimpid int32 // Number of import file IDs
Lnimpid uint32 // Number of import file IDs
Limpoff uint32 // Offset to start of import file IDs
Lstlen uint32 // Length of string table
Lstoff uint32 // Offset to start of string table
}

type LoaderHeader64 struct {
Lversion int32 // Loader section version number
Lnsyms int32 // Number of symbol table entries
Lnreloc int32 // Number of relocation table entries
Lversion uint32 // Loader section version number
Lnsyms uint32 // Number of symbol table entries
Lnreloc uint32 // Number of relocation table entries
Listlen uint32 // Length of import file ID string table
Lnimpid int32 // Number of import file IDs
Lnimpid uint32 // Number of import file IDs
Lstlen uint32 // Length of string table
Limpoff uint64 // Offset to start of import file IDs
Lstoff uint64 // Offset to start of string table
Expand All @@ -306,20 +306,20 @@ const (
type LoaderSymbol32 struct {
Lname [8]byte // Symbol name or byte offset into string table
Lvalue uint32 // Address field
Lscnum int16 // Section number containing symbol
Lsmtype int8 // Symbol type, export, import flags
Lsmclas int8 // Symbol storage class
Lifile int32 // Import file ID; ordinal of import file IDs
Lscnum uint16 // Section number containing symbol
Lsmtype uint8 // Symbol type, export, import flags
Lsmclas uint8 // Symbol storage class
Lifile uint32 // Import file ID; ordinal of import file IDs
Lparm uint32 // Parameter type-check field
}

type LoaderSymbol64 struct {
Lvalue uint64 // Address field
Loffset uint32 // Byte offset into string table of symbol name
Lscnum int16 // Section number containing symbol
Lsmtype int8 // Symbol type, export, import flags
Lsmclas int8 // Symbol storage class
Lifile int32 // Import file ID; ordinal of import file IDs
Lscnum uint16 // Section number containing symbol
Lsmtype uint8 // Symbol type, export, import flags
Lsmclas uint8 // Symbol storage class
Lifile uint32 // Import file ID; ordinal of import file IDs
Lparm uint32 // Parameter type-check field
}

Expand Down

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