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fw: Safer memory functions + asserts

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Introduce memcpy_s() and wordcpy_s() that takes the destination buffer
size as an argument. Use assert() which aborts our program to an
eternal loop if we hit problems.

Sprinkle asserts elsewhere as well.

Signed-off-by: Daniel Lublin <daniel@lublin.se>
This commit is contained in:
Michael Cardell Widerkrantz 2023-02-27 17:00:23 +01:00 • committed by Daniel Lublin
parent f386cec1ed
commit ccc3b16569
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GPG key ID: 75BD0FEB8D3E7830
7 changed files with 81 additions and 23 deletions
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17
hw/application_fpga/fw/tk1/lib.c
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@ -5,6 +5,7 @@
#include "lib.h"
#include "types.h"
#include "assert.h"
#if NOCONSOLE
void htif_putc(int ch)
@ -131,28 +132,32 @@ void *memset(void *dest, int c, unsigned n)
return dest;
}
__attribute__((used)) void *memcpy(void *dest, const void *src, unsigned n)
void memcpy_s(void *dest, size_t destsize, const void *src, size_t n)
{
assert(dest != NULL);
assert(src != NULL);
assert(destsize >= n);
uint8_t *src_byte = (uint8_t *)src;
uint8_t *dest_byte = (uint8_t *)dest;
for (int i = 0; i < n; i++) {
dest_byte[i] = src_byte[i];
}
return dest;
}
__attribute__((used)) void *wordcpy(void *dest, const void *src, unsigned n)
void wordcpy_s(void *dest, size_t destsize, const void *src, size_t n)
{
assert(dest != NULL);
assert(src != NULL);
assert(destsize >= n);
uint32_t *src_word = (uint32_t *)src;
uint32_t *dest_word = (uint32_t *)dest;
for (int i = 0; i < n; i++) {
dest_word[i] = src_word[i];
}
return dest;
}
int memeq(void *dest, const void *src, unsigned n)