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Code Issues Releases Activity

Do not use the function pointers for the internal operation of rtld_printf()

Browse Source 
functions. The _rtld_error() function might be called early during the rtld
bootstrap, in which case function pointers are not yet functional on ia64
due to required relocations not yet performed.

Reported, reviewed and tested by:	marcel
Approved by:	re (bz)
This commit is contained in:
Konstantin Belousov 2011-09-06 10:21:33 +00:00
parent bf6619ba88
commit b236731716
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=225417
1 changed files with 26 additions and 21 deletions
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47
libexec/rtld-elf/rtld_printf.c
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@ -46,7 +46,11 @@
#define MAXNBUF (sizeof(intmax_t) * NBBY + 1)
#define PRINT_METHOD_SNPRINTF 1
#define PRINT_METHOD_WRITE 2
struct snprintf_arg {
int method;
char *str;
char *buf;
size_t remain;
@ -54,16 +58,6 @@ struct snprintf_arg {
int fd;
};
static void
snprintf_func(int ch, struct snprintf_arg *const info)
{
if (info->remain >= 2) {
*info->str++ = ch;
info->remain--;
}
}
static void
printf_out(struct snprintf_arg *info)
{
@ -76,14 +70,24 @@ printf_out(struct snprintf_arg *info)
}
static void
printf_func(int ch, struct snprintf_arg *const info)
snprintf_func(int ch, struct snprintf_arg *const info)
{
if (info->remain > 0) {
*info->str++ = ch;
info->remain--;
} else
printf_out(info);
switch (info->method) {
case PRINT_METHOD_SNPRINTF:
if (info->remain >= 2) {
*info->str++ = ch;
info->remain--;
}
break;
case PRINT_METHOD_WRITE:
if (info->remain > 0) {
*info->str++ = ch;
info->remain--;
} else
printf_out(info);
break;
}
}
static char const hex2ascii_data[] = "0123456789abcdefghijklmnopqrstuvwxyz";
@ -113,10 +117,9 @@ ksprintn(char *nbuf, uintmax_t num, int base, int *lenp, int upper)
}
static int
kvprintf(char const *fmt, void (*func)(int c, struct snprintf_arg *const arg),
struct snprintf_arg *arg, int radix, va_list ap)
kvprintf(char const *fmt, struct snprintf_arg *arg, int radix, va_list ap)
{
#define PCHAR(c) func((c), arg)
#define PCHAR(c) snprintf_func((c), arg)
char nbuf[MAXNBUF];
const char *p, *percent, *q;
u_char *up;
@ -429,10 +432,11 @@ rtld_vsnprintf(char *buf, size_t bufsize, const char *fmt, va_list ap)
struct snprintf_arg info;
int retval;
info.method = PRINT_METHOD_SNPRINTF;
info.buf = info.str = buf;
info.buf_total = info.remain = bufsize;
info.fd = -1;
retval = kvprintf(fmt, snprintf_func, &info, 10, ap);
retval = kvprintf(fmt, &info, 10, ap);
if (info.remain >= 1)
*info.str++ = '\0';
return (retval);
@ -445,10 +449,11 @@ rtld_vfdprintf(int fd, const char *fmt, va_list ap)
struct snprintf_arg info;
int retval;
info.method = PRINT_METHOD_WRITE;
info.buf = info.str = buf;
info.buf_total = info.remain = sizeof(buf);
info.fd = fd;
retval = kvprintf(fmt, printf_func, &info, 10, ap);
retval = kvprintf(fmt, &info, 10, ap);
printf_out(&info);
return (retval);
}