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platform: Make the platform read-only

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platform should be a read-only variable, if it is placed in the data
segment, it may be exploited.

Signed-off-by: Xiang Wang <wxjstz@126.com>
This commit is contained in:
Xiang Wang
2019-03-06 15:29:34 +08:00
committed by Atish Patra
parent 27fae182dc
commit 9eb8f0f90d
11 changed files with 45 additions and 43 deletions
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12
lib/sbi_hart.c
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@@ -28,7 +28,7 @@ unsigned int sbi_current_hartid()
static void mstatus_init(struct sbi_scratch *scratch, u32 hartid)
{
struct sbi_platform *plat = sbi_platform_ptr(scratch);
const struct sbi_platform *plat = sbi_platform_ptr(scratch);
/* Enable FPU */
if (misa_extension('D') || misa_extension('F'))
@@ -79,7 +79,7 @@ static int fp_init(u32 hartid)
static int delegate_traps(struct sbi_scratch *scratch, u32 hartid)
{
struct sbi_platform *plat = sbi_platform_ptr(scratch);
const struct sbi_platform *plat = sbi_platform_ptr(scratch);
unsigned long interrupts, exceptions;
if (!misa_extension('S'))
@@ -122,7 +122,7 @@ unsigned long log2roundup(unsigned long x)
void sbi_hart_pmp_dump(struct sbi_scratch *scratch)
{
struct sbi_platform *plat = sbi_platform_ptr(scratch);
const struct sbi_platform *plat = sbi_platform_ptr(scratch);
unsigned long prot, addr, size, l2l;
unsigned int i;
@@ -160,7 +160,7 @@ static int pmp_init(struct sbi_scratch *scratch, u32 hartid)
u32 i, count;
unsigned long fw_start, fw_size_log2;
ulong prot, addr, log2size;
struct sbi_platform *plat = sbi_platform_ptr(scratch);
const struct sbi_platform *plat = sbi_platform_ptr(scratch);
if (!sbi_platform_has_pmp(plat))
return 0;
@@ -297,7 +297,7 @@ static unsigned long coldboot_wait_bitmap = 0;
void sbi_hart_wait_for_coldboot(struct sbi_scratch *scratch, u32 hartid)
{
unsigned long mipval;
struct sbi_platform *plat = sbi_platform_ptr(scratch);
const struct sbi_platform *plat = sbi_platform_ptr(scratch);
if ((sbi_platform_hart_count(plat) <= hartid) ||
(COLDBOOT_WAIT_BITMAP_SIZE <= hartid))
@@ -324,7 +324,7 @@ void sbi_hart_wait_for_coldboot(struct sbi_scratch *scratch, u32 hartid)
void sbi_hart_wake_coldboot_harts(struct sbi_scratch *scratch, u32 hartid)
{
struct sbi_platform *plat = sbi_platform_ptr(scratch);
const struct sbi_platform *plat = sbi_platform_ptr(scratch);
int max_hart = sbi_platform_hart_count(plat);
for(int i = 0; i < max_hart ; i++) {