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34 lines
966 B
C++
34 lines
966 B
C++
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#include "dobby_internal.h"
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#include "core/arch/Cpu.h"
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#include <unistd.h>
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#include <sys/mman.h>
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#include <string.h>
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#if !defined(__APPLE__)
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PUBLIC MemoryOperationError CodePatch(void *address, uint8_t *buffer, uint32_t buffer_size) {
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int page_size = (int)sysconf(_SC_PAGESIZE);
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uintptr_t page_align_address = ALIGN_FLOOR(address, page_size);
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int offset = (uintptr_t)address - page_align_address;
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#if defined(__ANDROID__) || defined(__linux__)
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// change page permission as rwx
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mprotect((void *)page_align_address, page_size, PROT_READ | PROT_WRITE | PROT_EXEC);
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// patch buffer
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memcpy((void *)((addr_t)page_align_address + offset), buffer, buffer_size);
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// restore page permission
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mprotect((void *)page_align_address, page_size, PROT_READ | PROT_EXEC);
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#endif
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addr_t clear_start_ = (addr_t)page_align_address + offset;
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ClearCache((void *)clear_start_, (void *)(clear_start_ + buffer_size));
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return kMemoryOperationSuccess;
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}
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#endif
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