tiny-printf does not know about the "l" modifier so far, which breaks
the crash dump on AArch64, because it uses %lx to print the registers.
Add an easy way of handling longs correctly.
Using a relatively decent compiler (GCC 5.3.0) this does _not_ increase
the code size of tiny-printf.o for 32-bit builds (where long and int
are actually the same), actually it looses three (ARM Thumb2) instructions
from the actual SPL (numbers for orangepi_plus_defconfig):
text data bss dec hex filename
758 0 0 758 2f6 spl/lib/tiny-printf.o before
18839 488 232 19559 4c67 spl/u-boot-spl before
758 0 0 758 2f6 spl/lib/tiny-printf.o after
18833 488 232 19553 4c61 spl/u-boot-spl after
This adds some substantial amount of code to a 64-bit build, though:
(taken after a later commit, which enables the ARM64 SPL build for sunxi)
text data bss dec hex filename
1542 0 0 1542 606 spl/lib/tiny-printf.o before
25830 392 360 26582 67d6 spl/u-boot-spl before
1758 0 0 1758 6de spl/lib/tiny-printf.o after
26040 392 360 26792 68a8 spl/u-boot-spl after
Signed-off-by: Andre Przywara <andre.przyw...@arm.com>
Reviewed-by: Simon Glass <s...@chromium.org>
---
lib/tiny-printf.c | 47 ++++++++++++++++++++++++++++++++++++-----------
1 file changed, 36 insertions(+), 11 deletions(-)
diff --git a/lib/tiny-printf.c b/lib/tiny-printf.c
index 30ac759..0b8512f 100644
--- a/lib/tiny-printf.c
+++ b/lib/tiny-printf.c
@@ -38,8 +38,8 @@ static void out_dgt(struct printf_info *info, char dgt)
info->zs = 1;
}
-static void div_out(struct printf_info *info, unsigned int *num,
- unsigned int div)
+static void div_out(struct printf_info *info, unsigned long *num,
+ unsigned long div)
{
unsigned char dgt = 0;
@@ -56,9 +56,9 @@ int _vprintf(struct printf_info *info, const char *fmt,
va_list va)
{
char ch;
char *p;
- unsigned int num;
+ unsigned long num;
char buf[12];
- unsigned int div;
+ unsigned long div;
while ((ch = *(fmt++))) {
if (ch != '%') {
@@ -66,6 +66,7 @@ int _vprintf(struct printf_info *info, const char *fmt,
va_list va)
} else {
bool lz = false;
int width = 0;
+ bool islong = false;
ch = *(fmt++);
if (ch == '0') {
@@ -80,6 +81,11 @@ int _vprintf(struct printf_info *info, const char *fmt,
va_list va)
ch = *fmt++;
}
}
+ if (ch == 'l') {
+ ch = *(fmt++);
+ islong = true;
+ }
+
info->bf = buf;
p = info->bf;
info->zs = 0;
@@ -89,24 +95,43 @@ int _vprintf(struct printf_info *info, const char *fmt,
va_list va)
goto abort;
case 'u':
case 'd':
- num = va_arg(va, unsigned int);
- if (ch == 'd' && (int)num < 0) {
- num = -(int)num;
- out(info, '-');
+ div = 1000000000;
+ if (islong) {
+ num = va_arg(va, unsigned long);
+ if (sizeof(long) > 4)
+ div *= div * 10;
+ } else {
+ num = va_arg(va, unsigned int);
+ }
+
+ if (ch == 'd') {
+ if (islong && (long)num < 0) {
+ num = -(long)num;
+ out(info, '-');
+ } else if (!islong && (int)num < 0) {
+ num = -(int)num;
+ out(info, '-');
+ }
}
if (!num) {
out_dgt(info, 0);
} else {
- for (div = 1000000000; div; div /= 10)
+ for (; div; div /= 10)
div_out(info, &num, div);
}
break;
case 'x':
- num = va_arg(va, unsigned int);
+ if (islong) {
+ num = va_arg(va, unsigned long);
+ div = 1UL << (sizeof(long) * 8 - 4);
+ } else {
+ num = va_arg(va, unsigned int);
+ div = 0x10000000;
+ }
if (!num) {
out_dgt(info, 0);
} else {
- for (div = 0x10000000; div; div /= 0x10)
+ for (; div; div /= 0x10)
div_out(info, &num, div);
}
break;
--
2.8.2
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