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Furnish b/loader paged write with write protection

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This commit is contained in:
Stefan Rueger
2026-04-05 18:48:43 +01:00
parent ccf27a4736
commit 6b694b0ff4
1 changed files with 18 additions and 1 deletions
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19
src/dryrun.c
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@@ -998,9 +998,26 @@ static int dryrun_paged_write(const PROGRAMMER *pgm, const AVRPART *p, const AVR
Return("cannot write page [0x%04x, 0x%04x] to %s %s as it is incompatible with memory [0, 0x%04x]",
addr, end - 1, dry.dp->desc, dmem->desc, dmem->size - 1);
// Protect reset vector just as -c urclock would
if(dry.bl == DRY_TOP && ur.vectornum > 0 && (mem_is_application(m) || mem_is_flash(m)) && addr == 0)
for(unsigned vecsz = m->size <= 8192? 2u: 4u, i = 0; i < vecsz && i < n_bytes; i++)
pgm->read_byte(pgm, p, dmem, i, m->buf+i);
for(; addr < end; addr += chunk) {
chunk = end - addr < page_size? end - addr: page_size;
// @@@ Check for bootloader write protection here
// Silently skip writing the chunk if that were to overwrite bootloader
if(dry.bl && mchr == 'F' && !mem_is_apptable(m) && ur.blend > ur.blstart) {
const AVRMEM *am;
int testa = addr;
// Translate XMEGA boot addresses to flash addresses
if(is_pdi(p) && mem_is_boot(m) && (am = avr_locate_application(p)))
testa += am->size;
if(testa >= ur.blstart && testa+chunk-1 <= ur.blend)
continue;
}
// Unless it is a bootloader flash looks like NOR-memory
(mchr == 'F' && !dry.bl? memand: memcpy) (dmem->buf + addr, m->buf + addr, chunk);