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commit 533dd2acf7eefa969fb770fa782b20519bd4bc0f
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Author: H.J. Lu <hjl.tools@gmail.com>
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Date: Tue Jun 9 12:15:01 2020 -0700
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Add "%d" support to _dl_debug_vdprintf
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"%d" will be used to print out signed value.
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diff --git a/elf/dl-misc.c b/elf/dl-misc.c
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index 2eb81eeb0231368d..3f28de3ee9d68368 100644
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--- a/elf/dl-misc.c
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+++ b/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)
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switch (*fmt)
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{
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/* Integer formatting. */
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+ case 'd':
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case 'u':
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case 'x':
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{
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@@ -179,11 +180,34 @@ _dl_debug_vdprintf (int fd, int tag_p, const char *fmt, va_list arg)
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#else
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unsigned long int num = va_arg (arg, unsigned int);
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#endif
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+ bool negative = false;
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+ if (*fmt == 'd')
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+ {
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+#if LONG_MAX != INT_MAX
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+ if (long_mod)
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+ {
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+ if ((long int) num < 0)
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+ negative = true;
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+ }
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+ else
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+ {
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+ if ((int) num < 0)
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+ {
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+ num = (unsigned int) num;
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+ negative = true;
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+ }
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+ }
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+#else
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+ if ((int) num < 0)
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+ negative = true;
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+#endif
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+ }
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+
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/* We use alloca() to allocate the buffer with the most
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pessimistic guess for the size. Using alloca() allows
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having more than one integer formatting in a call. */
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- char *buf = (char *) alloca (3 * sizeof (unsigned long int));
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- char *endp = &buf[3 * sizeof (unsigned long int)];
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+ char *buf = (char *) alloca (1 + 3 * sizeof (unsigned long int));
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+ char *endp = &buf[1 + 3 * sizeof (unsigned long int)];
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char *cp = _itoa (num, endp, *fmt == 'x' ? 16 : 10, 0);
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/* Pad to the width the user specified. */
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@@ -191,6 +215,9 @@ _dl_debug_vdprintf (int fd, int tag_p, const char *fmt, va_list arg)
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while (endp - cp < width)
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*--cp = fill;
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+ if (negative)
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+ *--cp = '-';
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+
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iov[niov].iov_base = cp;
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iov[niov].iov_len = endp - cp;
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++niov;
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