This patch adds a read_string() wrapper around readmem().
int read_string(int type_addr, unsigned long long addr, char *bufptr, size_t len);
The functionality is similar to that of readmem(), except that we stop reading
when we find an end-of-string marker than reading 'len' bytes.
This will be useful for reading the name of the 'powerpc' platform which is
needed for dynamic page address definition bits.
Signed-off-by: Suzuki K. Poulose <suzuki at in.ibm.com>
---
makedumpfile.c | 12 ++++++++++++
makedumpfile.h | 1 +
2 files changed, 13 insertions(+), 0 deletions(-)
diff --git a/makedumpfile.c b/makedumpfile.c
index 901b85c..e978e1c 100644
--- a/makedumpfile.c
+++ b/makedumpfile.c
@@ -373,6 +373,18 @@ error:
return FALSE;
}
+int
+read_string(int type_addr, unsigned long long addr, char *buf, size_t len)
+{
+ int i;
+
+ memset(buf, 0, len);
+ for (i = 0; i < len; i ++)
+ if (!readmem(VADDR, addr + i, &buf[i], 1))
+ break;
+ return i;
+}
+
int32_t
get_kernel_version(char *release)
{
diff --git a/makedumpfile.h b/makedumpfile.h
index e43ea84..9dc254e 100644
--- a/makedumpfile.h
+++ b/makedumpfile.h
@@ -1243,6 +1243,7 @@ extern struct srcfile_table srcfile_table;
int readmem(int type_addr, unsigned long long addr, void *bufptr, size_t size);
+int read_string(int type_addr, unsigned long long addr, char *bufptr, size_t len);
int get_str_osrelease_from_vmlinux(void);
int read_vmcoreinfo_xen(void);
int exclude_xen_user_domain(void);
