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Add functions to validate memory ranges.

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Unknown W. Brackets 2015-04-12 22:37:55 -07:00
parent ca14497111
commit 391ca8bed3
1 changed files with 29 additions and 5 deletions
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34
Core/MemMap.h
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@ -275,18 +275,42 @@ inline void MemcpyUnchecked(const u32 to_address, const u32 from_address, const
inline bool IsValidAddress(const u32 address) {
if ((address & 0x3E000000) == 0x08000000) {
return true;
} else if ((address & 0x3F800000) == 0x04000000) {
return true;
} else if ((address & 0xBFFF0000) == 0x00010000) {
return true;
} else if ((address & 0x3F000000) >= 0x08000000 && (address & 0x3F000000) < 0x08000000 + g_MemorySize) {
return true;
} else {
return false;
}
}
inline u32 ValidSize(const u32 address, const u32 requested_size) {
u32 max_size;
if ((address & 0x3E000000) == 0x08000000) {
max_size = 0x08000000 + g_MemorySize - address;
}
else if ((address & 0x3F800000) == 0x04000000) {
return true;
max_size = 0x04800000 - address;
}
else if ((address & 0xBFFF0000) == 0x00010000) {
return true;
max_size = 0x00014000 - address;
}
else if ((address & 0x3F000000) >= 0x08000000 && (address & 0x3F000000) < 0x08000000 + g_MemorySize) {
return true;
max_size = 0x08000000 + g_MemorySize - address;
} else {
max_size = 0;
}
else
return false;
if (requested_size > max_size) {
return max_size;
}
return requested_size;
}
inline bool IsValidRange(const u32 address, const u32 size) {
return IsValidAddress(address) && ValidSize(address, size) == size;
}
};