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Code Issues Releases Wiki Activity

Prevent underflow in calc_mask

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Signed-off-by: Klaus Kämpf <kkaempf@gmail.com>
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Klaus Kämpf 2022-09-12 19:53:44 +02:00 • committed by James
parent d182ba8edb
commit 2758cbb40c
1 changed files with 2 additions and 2 deletions
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4
Ghidra/Features/Decompiler/src/decompile/cpp/address.hh
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@ -479,7 +479,7 @@ inline bool Range::contains(const Address &addr) const {
/// \param size is the desired size in bytes /// \param size is the desired size in bytes
/// \return a value appropriate for masking off the first \e size bytes /// \return a value appropriate for masking off the first \e size bytes
inline uintb calc_mask(int4 size) { return uintbmasks[(size<8)? size : 8]; } inline uintb calc_mask(uint4 size) { return uintbmasks[(size<8)? size : 8]; }
/// Perform a CPUI_INT_RIGHT on the given val /// Perform a CPUI_INT_RIGHT on the given val
/// \param val is the value to shift /// \param val is the value to shift
@ -518,7 +518,7 @@ inline uintb minimalmask(uintb val)
} }
extern bool signbit_negative(uintb val,int4 size); ///< Return true if the sign-bit is set extern bool signbit_negative(uintb val,int4 size); ///< Return true if the sign-bit is set
extern uintb calc_mask(int4 size); ///< Calculate a mask for a given byte size extern uintb calc_mask(uint4 size); ///< Calculate a mask for a given byte size
extern uintb uintb_negate(uintb in,int4 size); ///< Negate the \e sized value extern uintb uintb_negate(uintb in,int4 size); ///< Negate the \e sized value
extern uintb sign_extend(uintb in,int4 sizein,int4 sizeout); ///< Sign-extend a value between two byte sizes extern uintb sign_extend(uintb in,int4 sizein,int4 sizeout); ///< Sign-extend a value between two byte sizes