int get_first_region(client_handle_t handle, region_info_t *rgn)
{
socket_info_t *s = SOCKET(handle);
if (CHECK_HANDLE(handle))
return CS_BAD_HANDLE;
if ((handle->Attributes & INFO_MASTER_CLIENT) &&
(!(s->state & SOCKET_REGION_INFO))) {
setup_regions(handle, 0, &s->c_region);
setup_regions(handle, 1, &s->a_region);
s->state |= SOCKET_REGION_INFO;
}
if (rgn->Attributes & REGION_TYPE_AM)
return match_region(handle, s->a_region, rgn);
else
return match_region(handle, s->c_region, rgn);
} /* get_first_region */
int dump_regions_from_environment(void)
{
Elf32_Ehdr *elfhdr_addr;
int rc = 0;
char *orig_bootargs;
char *bootargs;
char *p;
char *memargs_cmd;
char *memargs;
int nuf_ph;
range_t ck = {0, 0};
range_t *regions;
char *crashkernel;
unsigned int i;
unsigned int region_no;
/*
Right now getenv("crashkernel") has a value on the form
"crashkernel=nn[KMG]@ss[KMG]"
but this is expanded into
"crashkernel=${crashkernel}"
when constructing the kernel commandline, amounting to:
"crashkernel=crashkernel=nn[KMG]@ss[KMG]"
This might get fixed so this code can handle both.
*/
crashkernel = getenv("crashkernel");
if(crashkernel == NULL) {
debug("checkcrash: no crashkernel environment variable\n");
rc = 1;
goto out5;
}
crashkernel = strdup(crashkernel);
if(crashkernel == NULL) {
debug("checkcrash: could not strdup crashkernel variable\n");
rc = 1;
goto out5;
}
p = strchr(crashkernel, '=');
if (p != NULL) {
p++;
suffixed_addr_toul(p, &ck);
}
else {
suffixed_addr_toul(crashkernel, &ck);
}
/* Make copy of bootargs, if it exists */
orig_bootargs = getenv("bootargs");
if(orig_bootargs != NULL) {
orig_bootargs = strdup(orig_bootargs);
if(orig_bootargs == NULL) {
debug("checkcrash: could not strdup bootargs variable to reset to\n");
rc = 1;
goto out4;
}
}
/* Unset bootargs */
if (setenv("bootargs", "") != 0) {
debug("checkcrash: could not unset bootargs variable\n");
rc = 1;
goto out3;
}
/* Run memargs to set bootargs */
memargs_cmd = getenv("memargs");
if(memargs_cmd == NULL) {
debug("checkcrash: no memargs_cmd environment variable\n");
rc = 1;
goto out3;
}
#ifndef CONFIG_SYS_HUSH_PARSER
if (run_command(memargs_cmd, 0) < 0) {
debug("checkcrash: failed to run memargs\n");
rc = 1;
goto out3;
}
#else
if (parse_string_outer(memargs_cmd,
FLAG_PARSE_SEMICOLON | FLAG_EXIT_FROM_LOOP) != 0) {
debug("checkcrash: failed to run memargs\n");
rc = 1;
goto out3;
}
#endif
memargs = bootargs = strdup(getenv("bootargs"));
if(bootargs == NULL) {
debug("checkcrash: could not strdup bootargs variable to manipulate it\n");
rc = 1;
goto out3;
}
/* Restore bootargs */
if (orig_bootargs && setenv("bootargs", orig_bootargs)) {
debug("checkcrash: could not reset bootargs variable\n");
rc = 1;
goto out2;
}
/* Calculate the number of regions */
nuf_ph = 1; // One extra since the crashkernel is likely to split one of the regions
p = memargs;
while (*p != '\0') {
if (match_region(p)) {nuf_ph++;}
while (!isspace(*p)) {
p++;
}
while (isspace(*p)) {
p++;
}
}
/* Add one entry for SOC_AVS_BACKUPRAM */
nuf_ph += 1;
printf ("nuf_ph %d\n", nuf_ph);
regions = malloc(nuf_ph*sizeof(*regions));
if (regions == NULL) {
debug("checkcrash: could not allocate array of ranges\n");
rc = 1;
goto out2;
}
region_no = 0;
while (memargs != NULL) {
size_t len;
p = strsep(&memargs, " \t");
len = match_region(p);
if (!len)
continue;
p += len;
suffixed_addr_toul(p, ®ions[region_no]);
if (ck.start==(regions[region_no].start) &&
(ck.start+ck.size)==(regions[region_no].start+regions[region_no].size)) {
/* Skip */
}
else if (ck.start==(regions[region_no].start) &&
(ck.start+ck.size)<(regions[region_no].start+regions[region_no].size)) {
/* Skip beginning */
regions[region_no].start = ck.start+ck.size;
regions[region_no].size -= ck.size;
}
else if (ck.start>(regions[region_no].start) &&
(ck.start+ck.size)==(regions[region_no].start+regions[region_no].size)) {
/* Skip end */
regions[region_no].size -= ck.size;
}
else if (ck.start>=(regions[region_no].start) &&
(ck.start+ck.size)<=(regions[region_no].start+regions[region_no].size)) {
/* Split */
regions[region_no+1].start = ck.start + ck.size;
regions[region_no+1].size = (regions[region_no].start + regions[region_no].size) -
regions[region_no+1].start;
regions[region_no].size = ck.start - regions[region_no].start;
region_no++;
}
region_no++;
}
/* Add SOC_AVS_BACKUPRAM */
regions[region_no].start = SOC_AVS_BACKUPRAM;
regions[region_no].size = SOC_AVS_BACKUPRAM_LEN;
region_no++;
for (i=0;i<region_no;i++) {
debug("%lu placed at %lu\n", regions[i].size, regions[i].start);
}
elfhdr_addr = create_elfhdr(regions, region_no);
if (elfhdr_addr == NULL) {
debug("Could not create elfhdr\n");
rc = 1;
goto out1;
}
if (crashdump(elfhdr_addr) != 0) {
rc = 1;
}
free(elfhdr_addr);
out1:
free(regions);
out2:
free(bootargs);
out3:
free(orig_bootargs);
out4:
free(crashkernel);
out5:
return rc;
}
int get_next_region(client_handle_t handle, region_info_t *rgn)
{
if (CHECK_HANDLE(handle))
return CS_BAD_HANDLE;
return match_region(handle, rgn->next, rgn);
} /* get_next_region */
