It's only use is in lib/hexdump.c
Instead, use scnprintf in lib/hexdump.c
Use "%0nx" not "%n.nx" (Smaller kernel, one byte at a time, woohoo!)
Use true not 1 for print_hex_dump
A bit of indentation style in lib/hexdump.c
Size before/after
text data bss dec hex filename
1037 0 0 1037 40d lib/hexdump.o
text data bss dec hex filename
1019 0 0 1019 3fb lib/hexdump.o
Signed-off-by: Joe Perches <[email protected]>
---
include/linux/kernel.h | 1 -
lib/hexdump.c | 23 ++++++++++-------------
2 files changed, 10 insertions(+), 14 deletions(-)
diff --git a/include/linux/kernel.h b/include/linux/kernel.h
index 94bc996..77b187f 100644
--- a/include/linux/kernel.h
+++ b/include/linux/kernel.h
@@ -256,7 +256,6 @@ extern void print_hex_dump(const char *level, const char *prefix_str,
const void *buf, size_t len, bool ascii);
extern void print_hex_dump_bytes(const char *prefix_str, int prefix_type,
const void *buf, size_t len);
-#define hex_asc(x) "0123456789abcdef"[x]
#define pr_emerg(fmt, arg...) \
printk(KERN_EMERG fmt, ##arg)
diff --git a/lib/hexdump.c b/lib/hexdump.c
index bd5edae..70e23fb 100644
--- a/lib/hexdump.c
+++ b/lib/hexdump.c
@@ -41,7 +41,6 @@ void hex_dump_to_buffer(const void *buf, size_t len, int rowsize,
bool ascii)
{
const u8 *ptr = buf;
- u8 ch;
int j, lx = 0;
int ascii_column;
@@ -62,7 +61,9 @@ void hex_dump_to_buffer(const void *buf, size_t len, int rowsize,
for (j = 0; j < ngroups; j++)
lx += scnprintf(linebuf + lx, linebuflen - lx,
- "%16.16llx ", (unsigned long long)*(ptr8 + j));
+ "%016llx ",
+ (unsigned long long)*(ptr8 + j) &
+ 0xffffffffffffffffULL);
ascii_column = 17 * ngroups + 2;
break;
}
@@ -73,7 +74,7 @@ void hex_dump_to_buffer(const void *buf, size_t len, int rowsize,
for (j = 0; j < ngroups; j++)
lx += scnprintf(linebuf + lx, linebuflen - lx,
- "%8.8x ", *(ptr4 + j));
+ "%08x ", *(ptr4 + j) & 0xffffffffU);
ascii_column = 9 * ngroups + 2;
break;
}
@@ -84,19 +85,15 @@ void hex_dump_to_buffer(const void *buf, size_t len, int rowsize,
for (j = 0; j < ngroups; j++)
lx += scnprintf(linebuf + lx, linebuflen - lx,
- "%4.4x ", *(ptr2 + j));
+ "%04x ", *(ptr2 + j) & 0xffff);
ascii_column = 5 * ngroups + 2;
break;
}
default:
- for (j = 0; (j < rowsize) && (j < len) && (lx + 4) < linebuflen;
- j++) {
- ch = ptr[j];
- linebuf[lx++] = hex_asc(ch >> 4);
- linebuf[lx++] = hex_asc(ch & 0x0f);
- linebuf[lx++] = ' ';
- }
+ for (j = 0; (j < rowsize) && (j < len) < linebuflen; j++)
+ lx += scnprintf(linebuf + lx, linebuflen - lx,
+ "%02x ", ptr[j] & 0xff);
ascii_column = 3 * rowsize + 2;
break;
}
@@ -163,7 +160,7 @@ void print_hex_dump(const char *level, const char *prefix_str, int prefix_type,
switch (prefix_type) {
case DUMP_PREFIX_ADDRESS:
printk("%s%s%*p: %s\n", level, prefix_str,
- (int)(2 * sizeof(void *)), ptr + i, linebuf);
+ (int)(2 * sizeof(void *)), ptr + i, linebuf);
break;
case DUMP_PREFIX_OFFSET:
printk("%s%s%.8x: %s\n", level, prefix_str, i, linebuf);
@@ -192,6 +189,6 @@ void print_hex_dump_bytes(const char *prefix_str, int prefix_type,
const void *buf, size_t len)
{
print_hex_dump(KERN_DEBUG, prefix_str, prefix_type, 16, 1,
- buf, len, 1);
+ buf, len, true);
}
EXPORT_SYMBOL(print_hex_dump_bytes);
-
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