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Merge further fixes to the 32-bit recompiler

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Remove mprotect usages in 32-bit x86 dynamic recompiler
This commit is contained in:
Laci bá
2021-10-16 19:43:50 +02:00
committed by GitHub
parent 8b5e39ceed
commit 17f7fa3437
1 changed files with 1 additions and 18 deletions
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19
src/codegen/codegen_x86.c
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@@ -1173,17 +1173,10 @@ static uint32_t gen_MEM_CHECK_WRITE_L()
void codegen_init()
{
#ifdef __unix__
void *start;
size_t len;
long pagesize = sysconf(_SC_PAGESIZE);
long pagemask = ~(pagesize - 1);
#endif
#ifdef _WIN32
codeblock = VirtualAlloc(NULL, (BLOCK_SIZE+1) * sizeof(codeblock_t), MEM_COMMIT, PAGE_EXECUTE_READWRITE);
#elif defined __unix__
codeblock = mmap(NULL, (BLOCK_SIZE+1) * sizeof(codeblock_t), PROT_READ | PROT_WRITE, MAP_ANON | MAP_PRIVATE, 0, 0);
codeblock = mmap(NULL, (BLOCK_SIZE+1) * sizeof(codeblock_t), PROT_READ | PROT_WRITE | PROT_EXEC, MAP_ANON | MAP_PRIVATE, 0, 0);
#else
codeblock = malloc((BLOCK_SIZE+1) * sizeof(codeblock_t));
#endif
@@ -1192,16 +1185,6 @@ void codegen_init()
memset(codeblock, 0, (BLOCK_SIZE+1) * sizeof(codeblock_t));
memset(codeblock_hash, 0, HASH_SIZE * sizeof(codeblock_t *));
#ifdef __unix__
start = (void *)((long)codeblock & pagemask);
len = (((BLOCK_SIZE+1) * sizeof(codeblock_t)) + pagesize) & pagemask;
if (mprotect(start, len, PROT_READ | PROT_WRITE | PROT_EXEC) != 0)
{
perror("mprotect");
exit(-1);
}
#endif
block_current = BLOCK_SIZE;
block_pos = 0;
mem_abrt_rout = (uint32_t)&codeblock[block_current].data[block_pos];