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authorAlbert Ou <albert@sifive.com>2016-12-13 15:05:19 -0800
committerAlbert Ou <albert@sifive.com>2016-12-14 12:23:40 -0800
commit3dbaad0a1f27b96462541e1189efe37ffa913e9a (patch)
treef50f770a39bc5d9fd9296862b4806c5dd7d0eed6 /bsp/libwrap/misc
parent82d5cab92318ca82f6fb95921cd70e4aefa28cd9 (diff)
Refactor libc stubs into libwrap
The --wrap feature of GNU ld supports a cleaner framework for linking in alternative implementations of libc functions without cpp hacks. Place wrappers in separate object files to reduce static code size.
Diffstat (limited to 'bsp/libwrap/misc')
-rw-r--r--bsp/libwrap/misc/write_hex.c19
1 files changed, 19 insertions, 0 deletions
diff --git a/bsp/libwrap/misc/write_hex.c b/bsp/libwrap/misc/write_hex.c
new file mode 100644
index 0000000..e678bdc
--- /dev/null
+++ b/bsp/libwrap/misc/write_hex.c
@@ -0,0 +1,19 @@
+/* See LICENSE of license details. */
+
+#include <stdint.h>
+#include <unistd.h>
+#include "platform.h"
+
+void write_hex(int fd, uint32_t hex)
+{
+ uint8_t ii;
+ uint8_t jj;
+ char towrite;
+ write(fd , "0x", 2);
+ for (ii = 8 ; ii > 0; ii--) {
+ jj = ii - 1;
+ uint8_t digit = ((hex & (0xF << (jj*4))) >> (jj*4));
+ towrite = digit < 0xA ? ('0' + digit) : ('A' + (digit - 0xA));
+ write(fd, &towrite, 1);
+ }
+}