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Restore fallback allocator

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This commit is contained in:
Harrison 2022-05-15 21:45:16 -04:00
parent 91bc6b8ad1
commit 1244b6b4b6
1 changed files with 25 additions and 1 deletions
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26
src/lj_mcode.c
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@ -124,10 +124,34 @@ static int mcode_setprot(void *p, size_t sz, int prot)
return mprotect(p, sz, prot);
}
#else
#elif LJ_64 || LUAJIT_SECURITY_MCODE
#error "Missing OS support for explicit placement of executable memory"
#else
/* Fallback allocator. This will fail if memory is not executable by default. */
#define MCPROT_RW 0
#define MCPROT_RX 0
#define MCPROT_RWX 0
static void *mcode_alloc_at(jit_State *J, uintptr_t hint, size_t sz, int prot)
{
UNUSED(hint); UNUSED(prot);
return lj_mem_new(J->L, sz);
}
static void mcode_free(jit_State *J, void *p, size_t sz)
{
lj_mem_free(J2G(J), p, sz);
}
static int mcode_setprot(void *p, size_t sz, int prot)
{
UNUSED(p); UNUSED(sz); UNUSED(prot);
return 0;
}
#endif
/* -- MCode area protection ----------------------------------------------- */