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flash write range check

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NIIBE Yutaka
2012-05-28 13:00:58 +09:00
parent ba8609be41
commit 1576b8303e
2 changed files with 10 additions and 2 deletions
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11
src/sys.c
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@@ -4,6 +4,10 @@
#include "board.h"
#include "usb_lld.h"
extern uint8_t __flash_start__, __flash_end__;
extern uint8_t _regnual_start;
static const uint8_t *
unique_device_id (void)
{
@@ -126,6 +130,11 @@ static int
flash_write (uint32_t dst_addr, const uint8_t *src, size_t len)
{
int status;
uint32_t flash_start = (uint32_t)&__flash_start__;
uint32_t flash_end = (uint32_t)&__flash_end__;
if (dst_addr < flash_start || dst_addr + len > flash_end)
return 0;
while (len)
{
@@ -174,8 +183,6 @@ flash_protect (void)
return (option_bytes_value & 0xff) == 0xff ? 1 : 0;
}
extern uint8_t __flash_start__, __flash_end__;
extern uint8_t _regnual_start;
static void __attribute__((naked))
flash_mass_erase_and_exec (void)