diff options
| author | Andre Przywara <andre.przywara@arm.com> | 2017-01-02 11:48:28 +0000 |
|---|---|---|
| committer | Jagan Teki <jagan@openedev.com> | 2017-01-04 16:37:40 +0100 |
| commit | a28e1d98310e62dc88947b91d17105b58de01889 (patch) | |
| tree | d5e21ff49840359140b9d1f661e6c391b4348746 /lib | |
| parent | aa9226f0edba6a07c59e2645533e5cf625096cc9 (diff) | |
SPL: tiny-printf: add "l" modifier
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.przywara@arm.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Jagan Teki <jagan@openedev.com>
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/tiny-printf.c | 47 |
1 files changed, 36 insertions, 11 deletions
diff --git a/lib/tiny-printf.c b/lib/tiny-printf.c index 30ac7596d3..0b8512faf5 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; |