cr_read(3)cr_read(3)NAMEcr_read - read from crash dump
The function attempts to read the memory area defined by mem_page and
num_pages into the buffer pointed to by buf from the crash dump opened
The starts at the position in the crash dump associated with the physi‐
cal memory offset given by mem_page. If the physical memory page
mem_page does not exist in the crash dump, sets *num_pages to 0 and
No data transfer will occur past a page of memory that does not exist
in the crash dump. If the starting position, mem_page, plus the read
length, *num_pages, goes past an area of memory that does not exist in
the crash dump, sets *num_pages to the number of consecutive pages
(starting at mem_page) actually read.
Returns zero for success. Other possible return values are described
Assuming a process opened a crash dump, the following call to
cr_read(3) reads the first pages from the crash dump into the buffer
pointed to by mybuf:
may return fewer pages than requested due to implementation details.
Always check the number of pages returned. If they are fewer than
requested, issue a new request starting at the first page not returned.
Only if that new request reads zero pages (or returns an error) can you
be sure that the page was not dumped.
was developed by HP.
SEE ALSOcr_open(3), libcrash(5).