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added sum command

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git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@1434 c046a42c-6fe2-441c-8c8c-71466251a162
This commit is contained in:
bellard 2005-06-04 20:15:57 +00:00
parent 72cc6cfeef
commit e4cf1adc80
1 changed files with 18 additions and 0 deletions
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18
monitor.c
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@ -562,6 +562,22 @@ static void do_print(int count, int format, int size, unsigned int valh, unsigne
term_printf("\n");
}
static void do_sum(uint32_t start, uint32_t size)
{
uint32_t addr;
uint8_t buf[1];
uint16_t sum;
sum = 0;
for(addr = start; addr < (start + size); addr++) {
cpu_physical_memory_rw(addr, buf, 1, 0);
/* BSD sum algorithm ('sum' Unix command) */
sum = (sum >> 1) | (sum << 15);
sum += buf[0];
}
term_printf("%05d\n", sum);
}
typedef struct {
int keycode;
const char *name;
@ -906,6 +922,8 @@ static term_cmd_t term_cmds[] = {
"keys", "send keys to the VM (e.g. 'sendkey ctrl-alt-f1')" },
{ "system_reset", "", do_system_reset,
"", "reset the system" },
{ "sum", "ii", do_sum,
"addr size", "compute the checksum of a memory region" },
{ NULL, NULL, },
};