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src/file_exs.c: add frama-c annotations

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This commit is contained in:
Christophe Grenier 2021-02-19 18:50:26 +01:00
parent 08f3b8a87f
commit 21e89f31e8
1 changed files with 24 additions and 0 deletions
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24
src/file_exs.c
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@ -31,6 +31,7 @@
#include "types.h"
#include "filegen.h"
/*@ requires \valid(file_stat); */
static void register_header_check_exs(file_stat_t *file_stat);
const file_hint_t file_hint_exs= {
@ -42,6 +43,11 @@ const file_hint_t file_hint_exs= {
.register_header_check=&register_header_check_exs
};
/*@
@ requires \valid(file_recovery);
@ requires valid_read_string((char*)&file_recovery->filename);
@ requires file_recovery->file_rename==&file_rename_exs;
@*/
static void file_rename_exs(file_recovery_t *file_recovery)
{
unsigned char buffer[512];
@ -54,6 +60,24 @@ static void file_rename_exs(file_recovery_t *file_recovery)
file_rename(file_recovery, buffer, buffer_size, 0x14, "exs", 0);
}
/*@
@ requires buffer_size >= 0x14;
@ requires \valid_read(buffer+(0..buffer_size-1));
@ requires \valid_read(file_recovery);
@ requires file_recovery->file_stat==\null || valid_read_string((char*)file_recovery->filename);
@ requires \valid(file_recovery_new);
@ requires file_recovery_new->blocksize > 0;
@ requires separation: \separated(&file_hint_exs, buffer+(..), file_recovery, file_recovery_new);
@ ensures \result == 0 || \result == 1;
@ ensures (\result == 1) ==> (file_recovery_new->file_stat == \null);
@ ensures (\result == 1) ==> (file_recovery_new->handle == \null);
@ ensures (\result == 1) ==> (file_recovery_new->file_rename == &file_rename_exs);
@ ensures (\result == 1) ==> (valid_read_string(file_recovery_new->extension));
@ ensures (\result == 1) ==> \separated(file_recovery_new, file_recovery_new->extension);
@ ensures \result!=0 ==> valid_file_recovery(file_recovery_new);
@ assigns *file_recovery_new;
@*/
static int header_check_exs(const unsigned char *buffer, const unsigned int buffer_size, const unsigned int safe_header_only, const file_recovery_t *file_recovery, file_recovery_t *file_recovery_new)
{
if(memcmp(&buffer[0x10], "TBOS", 4)!=0)