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. Also there are printfs using the '-' modifier, which we choose to ignore for simplicity.
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.przywara@arm.com --- lib/tiny-printf.c | 50 +++++++++++++++++++++++++++++++++++++++----------- 1 file changed, 39 insertions(+), 11 deletions(-)
diff --git a/lib/tiny-printf.c b/lib/tiny-printf.c index 30ac759..dfa8432 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 != '%') { @@ -66,8 +66,12 @@ 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 == '-') + ch = *(fmt++); + if (ch == '0') { ch = *(fmt++); lz = 1; @@ -80,6 +84,11 @@ 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 +98,43 @@ 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;