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ARM/Memory: Correct Exclusive Monitor and Implement Exclusive Memory Writes.

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This commit is contained in:
Fernando Sahmkow 2020-03-07 18:59:42 -04:00
parent 535c542d84
commit cd1c38be8d
12 changed files with 325 additions and 24 deletions
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65
src/core/memory.h
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@ -244,6 +244,71 @@ public:
*/
void Write64(VAddr addr, u64 data);
/**
* Writes a 8-bit unsigned integer to the given virtual address in
* the current process' address space if and only if the address contains
* the expected value. This operation is atomic.
*
* @param addr The virtual address to write the 8-bit unsigned integer to.
* @param data The 8-bit unsigned integer to write to the given virtual address.
* @param expected The 8-bit unsigned integer to check against the given virtual address.
*
* @post The memory range [addr, sizeof(data)) contains the given data value.
*/
bool WriteExclusive8(VAddr addr, u8 data, u8 expected);
/**
* Writes a 16-bit unsigned integer to the given virtual address in
* the current process' address space if and only if the address contains
* the expected value. This operation is atomic.
*
* @param addr The virtual address to write the 16-bit unsigned integer to.
* @param data The 16-bit unsigned integer to write to the given virtual address.
* @param expected The 16-bit unsigned integer to check against the given virtual address.
*
* @post The memory range [addr, sizeof(data)) contains the given data value.
*/
bool WriteExclusive16(VAddr addr, u16 data, u16 expected);
/**
* Writes a 32-bit unsigned integer to the given virtual address in
* the current process' address space if and only if the address contains
* the expected value. This operation is atomic.
*
* @param addr The virtual address to write the 32-bit unsigned integer to.
* @param data The 32-bit unsigned integer to write to the given virtual address.
* @param expected The 32-bit unsigned integer to check against the given virtual address.
*
* @post The memory range [addr, sizeof(data)) contains the given data value.
*/
bool WriteExclusive32(VAddr addr, u32 data, u32 expected);
/**
* Writes a 64-bit unsigned integer to the given virtual address in
* the current process' address space if and only if the address contains
* the expected value. This operation is atomic.
*
* @param addr The virtual address to write the 64-bit unsigned integer to.
* @param data The 64-bit unsigned integer to write to the given virtual address.
* @param expected The 64-bit unsigned integer to check against the given virtual address.
*
* @post The memory range [addr, sizeof(data)) contains the given data value.
*/
bool WriteExclusive64(VAddr addr, u64 data, u64 expected);
/**
* Writes a 128-bit unsigned integer to the given virtual address in
* the current process' address space if and only if the address contains
* the expected value. This operation is atomic.
*
* @param addr The virtual address to write the 128-bit unsigned integer to.
* @param data The 128-bit unsigned integer to write to the given virtual address.
* @param expected The 128-bit unsigned integer to check against the given virtual address.
*
* @post The memory range [addr, sizeof(data)) contains the given data value.
*/
bool WriteExclusive128(VAddr addr, u128 data, u128 expected);
/**
* Reads a null-terminated string from the given virtual address.
* This function will continually read characters until either: