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PAGE_EXEC support (Blue Swirl) 

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@1692 c046a42c-6fe2-441c-8c8c-71466251a162
This commit is contained in:
bellard 2005-12-05 20:29:47 +00:00
parent f881a0d4f6
commit 227671c93b
1 changed files with 31 additions and 15 deletions
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46
target-sparc/helper.c
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@ -75,10 +75,27 @@ static const int access_table[8][8] = {
{ 2, 2, 2, 0, 2, 2, 2, 0 }
};
/* 1 = write OK */
static const int rw_table[2][8] = {
{ 0, 1, 0, 1, 0, 1, 0, 1 },
{ 0, 1, 0, 1, 0, 0, 0, 0 }
static const int perm_table[2][8] = {
{
PAGE_READ,
PAGE_READ | PAGE_WRITE,
PAGE_READ | PAGE_EXEC,
PAGE_READ | PAGE_WRITE | PAGE_EXEC,
PAGE_EXEC,
PAGE_READ | PAGE_WRITE,
PAGE_READ | PAGE_EXEC,
PAGE_READ | PAGE_WRITE | PAGE_EXEC
},
{
PAGE_READ,
PAGE_READ | PAGE_WRITE,
PAGE_READ | PAGE_EXEC,
PAGE_READ | PAGE_WRITE | PAGE_EXEC,
PAGE_EXEC,
PAGE_READ,
0,
0,
}
};
int get_physical_address (CPUState *env, target_phys_addr_t *physical, int *prot,
@ -95,7 +112,7 @@ int get_physical_address (CPUState *env, target_phys_addr_t *physical, int *prot
virt_addr = address & TARGET_PAGE_MASK;
if ((env->mmuregs[0] & MMU_E) == 0) { /* MMU disabled */
*physical = address;
*prot = PAGE_READ | PAGE_WRITE;
*prot = PAGE_READ | PAGE_WRITE | PAGE_EXEC;
return 0;
}
@ -177,12 +194,11 @@ int get_physical_address (CPUState *env, target_phys_addr_t *physical, int *prot
return error_code;
/* the page can be put in the TLB */
*prot = PAGE_READ;
if (pde & PG_MODIFIED_MASK) {
*prot = perm_table[is_user][access_perms];
if (!(pde & PG_MODIFIED_MASK)) {
/* only set write access if already dirty... otherwise wait
for dirty access */
if (rw_table[is_user][access_perms])
*prot |= PAGE_WRITE;
*prot &= ~PAGE_WRITE;
}
/* Even if large ptes, we map only one 4KB page in the cache to
@ -206,7 +222,7 @@ int cpu_sparc_handle_mmu_fault (CPUState *env, target_ulong address, int rw,
#ifdef DEBUG_MMU
printf("Translate at 0x%lx -> 0x%lx, vaddr 0x%lx\n", (long)address, (long)paddr, (long)vaddr);
#endif
ret = tlb_set_page(env, vaddr, paddr, prot, is_user, is_softmmu);
ret = tlb_set_page_exec(env, vaddr, paddr, prot, is_user, is_softmmu);
return ret;
}
@ -221,8 +237,8 @@ int cpu_sparc_handle_mmu_fault (CPUState *env, target_ulong address, int rw,
// neverland. Fake/overridden mappings will be flushed when
// switching to normal mode.
vaddr = address & TARGET_PAGE_MASK;
prot = PAGE_READ | PAGE_WRITE;
ret = tlb_set_page(env, vaddr, paddr, prot, is_user, is_softmmu);
prot = PAGE_READ | PAGE_WRITE | PAGE_EXEC;
ret = tlb_set_page_exec(env, vaddr, paddr, prot, is_user, is_softmmu);
return ret;
} else {
if (rw & 2)
@ -405,7 +421,7 @@ static int get_physical_address_code(CPUState *env, target_phys_addr_t *physical
if ((env->lsu & IMMU_E) == 0) { /* IMMU disabled */
*physical = address;
*prot = PAGE_READ;
*prot = PAGE_EXEC;
return 0;
}
@ -441,7 +457,7 @@ static int get_physical_address_code(CPUState *env, target_phys_addr_t *physical
return 1;
}
*physical = (env->itlb_tte[i] & mask & 0x1fffffff000ULL) + (address & ~mask & 0x1fffffff000ULL);
*prot = PAGE_READ;
*prot = PAGE_EXEC;
return 0;
}
}
@ -477,7 +493,7 @@ int cpu_sparc_handle_mmu_fault (CPUState *env, target_ulong address, int rw,
#ifdef DEBUG_MMU
printf("Translate at 0x%llx -> 0x%llx, vaddr 0x%llx\n", address, paddr, vaddr);
#endif
ret = tlb_set_page(env, vaddr, paddr, prot, is_user, is_softmmu);
ret = tlb_set_page_exec(env, vaddr, paddr, prot, is_user, is_softmmu);
return ret;
}
// XXX