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Add "%d" support to _dl_debug_vdprintf

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"%d" will be used to print out signed value.
This commit is contained in:
H.J. Lu 2020-06-09 12:15:01 -07:00
parent a365ac45b7
commit 533dd2acf7
1 changed files with 29 additions and 2 deletions
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31
elf/dl-misc.c
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@ -167,6 +167,7 @@ _dl_debug_vdprintf (int fd, int tag_p, const char *fmt, va_list arg)
switch (*fmt)
{
/* Integer formatting. */
case 'd':
case 'u':
case 'x':
{
@ -179,11 +180,34 @@ _dl_debug_vdprintf (int fd, int tag_p, const char *fmt, va_list arg)
#else
unsigned long int num = va_arg (arg, unsigned int);
#endif
bool negative = false;
if (*fmt == 'd')
{
#if LONG_MAX != INT_MAX
if (long_mod)
{
if ((long int) num < 0)
negative = true;
}
else
{
if ((int) num < 0)
{
num = (unsigned int) num;
negative = true;
}
}
#else
if ((int) num < 0)
negative = true;
#endif
}
/* We use alloca() to allocate the buffer with the most
pessimistic guess for the size. Using alloca() allows
having more than one integer formatting in a call. */
char *buf = (char *) alloca (3 * sizeof (unsigned long int));
char *endp = &buf[3 * sizeof (unsigned long int)];
char *buf = (char *) alloca (1 + 3 * sizeof (unsigned long int));
char *endp = &buf[1 + 3 * sizeof (unsigned long int)];
char *cp = _itoa (num, endp, *fmt == 'x' ? 16 : 10, 0);
/* Pad to the width the user specified. */
@ -191,6 +215,9 @@ _dl_debug_vdprintf (int fd, int tag_p, const char *fmt, va_list arg)
while (endp - cp < width)
*--cp = fill;
if (negative)
*--cp = '-';
iov[niov].iov_base = cp;
iov[niov].iov_len = endp - cp;
++niov;