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oaknut: Add support for iOS memory protection.

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This commit is contained in:
Steveice10 2023-04-18 10:10:02 -07:00 committed by merry
parent 14207278af
commit dc54784b87
1 changed files with 13 additions and 0 deletions
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13
include/oaknut/code_block.hpp
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@ -16,6 +16,7 @@
# include <pthread.h>
# include <sys/mman.h>
# include <unistd.h>
# include <TargetConditionals.h>
#else
# include <sys/mman.h>
#endif
@ -30,7 +31,11 @@ public:
#if defined(_WIN32)
m_memory = (std::uint32_t*)VirtualAlloc(nullptr, size, MEM_COMMIT, PAGE_EXECUTE_READWRITE);
#elif defined(__APPLE__)
#if TARGET_OS_IPHONE
m_memory = (std::uint32_t*)mmap(nullptr, size, PROT_READ | PROT_EXEC, MAP_ANON | MAP_PRIVATE, -1, 0);
#else
m_memory = (std::uint32_t*)mmap(nullptr, size, PROT_READ | PROT_WRITE | PROT_EXEC, MAP_ANON | MAP_PRIVATE | MAP_JIT, -1, 0);
#endif
#else
m_memory = (std::uint32_t*)mmap(nullptr, size, PROT_READ | PROT_WRITE | PROT_EXEC, MAP_ANON | MAP_PRIVATE, -1, 0);
#endif
@ -64,14 +69,22 @@ public:
void protect()
{
#if defined(__APPLE__)
#if TARGET_OS_IPHONE
mprotect(m_memory, m_size, PROT_READ | PROT_EXEC);
#else
pthread_jit_write_protect_np(1);
#endif
#endif
}
void unprotect()
{
#if defined(__APPLE__)
#if TARGET_OS_IPHONE
mprotect(m_memory, m_size, PROT_READ | PROT_WRITE);
#else
pthread_jit_write_protect_np(0);
#endif
#endif
}