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Dynamic recompiler now works on Linux (32-bit only)

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This commit is contained in:
TomW 2015-04-11 18:31:51 +01:00
commit 1fb4de4507
10 changed files with 3644 additions and 35 deletions
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22
src/codegen_x86.c
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@ -16,6 +16,11 @@
#include "codegen_ops.h"
#include "codegen_ops_x86.h"
#ifdef __linux__
#include <sys/mman.h>
#include <unistd.h>
#endif
x86seg *op_ea_seg;
int op_ssegs;
uint32_t op_old_pc;
@ -49,13 +54,28 @@ static int last_ssegs;
void codegen_init()
{
int c;
#ifdef __linux__
void *start;
size_t len;
long pagesize = sysconf(_SC_PAGESIZE);
long pagemask = ~(pagesize - 1);
#endif
codeblock = malloc(BLOCK_SIZE * sizeof(codeblock_t));
codeblock_hash = malloc(HASH_SIZE * sizeof(codeblock_t *));
memset(codeblock, 0, BLOCK_SIZE * sizeof(codeblock_t));
memset(codeblock_hash, 0, HASH_SIZE * sizeof(codeblock_t *));
#ifdef __linux__
start = (void *)((long)codeblock & pagemask);
len = ((BLOCK_SIZE * sizeof(codeblock_t)) + pagesize) & pagemask;
if (mprotect(start, len, PROT_READ | PROT_WRITE | PROT_EXEC) != 0)
{
perror("mprotect");
exit(-1);
}
#endif
// pclog("Codegen is %p\n", (void *)pages[0xfab12 >> 12].block);
}