diff options
Diffstat (limited to 'prog/target.go')
| -rw-r--r-- | prog/target.go | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/prog/target.go b/prog/target.go index 80a2665ae..631b756e8 100644 --- a/prog/target.go +++ b/prog/target.go @@ -44,6 +44,9 @@ type Target struct { // Used as fallback when string type does not have own dictionary. StringDictionary []string + // Additional special invalid pointer values besides NULL to use. + SpecialPointers []uint64 + // Filled by prog package: init sync.Once initArch func(target *Target) @@ -55,6 +58,8 @@ type Target struct { any anyTypes } +const maxSpecialPointers = 16 + var targets = make(map[string]*Target) func RegisterTarget(target *Target, initArch func(target *Target)) { @@ -101,6 +106,15 @@ func (target *Target) lazyInit() { target.initTarget() target.initArch(target) target.ConstMap = nil // currently used only by initArch + // Give these 2 known addresses fixed positions and prepend target-specific ones at the end. + target.SpecialPointers = append([]uint64{ + 0x0000000000000000, // NULL pointer (keep this first because code uses special index=0 as NULL) + 0xffffffffffffffff, // unmapped kernel address (keep second because serialized value will match actual pointer value) + 0x9999999999999999, // non-canonical address + }, target.SpecialPointers...) + if len(target.SpecialPointers) > maxSpecialPointers { + panic("too many special pointers") + } } func (target *Target) initTarget() { |