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/*
* File: ldutil.c
* Date: 15 March 1998
* Acct: David Powell (dep)
* Desc: Functions that didn't fit anywhere else
*
*
* Acct: Sandy Harvie (charvie)
* Date: 27 March 2019
* Desc: Modified for x86-64
*/
/* LINTLIBRARY */
#include "fcntl.h"
#include "stdio.h"
#include "stdlib.h"
#include "string.h"
#include "unistd.h"
#include "ldtypes.h"
#include "ldutil.h"
static const char *err_zero = "ld.so.1: panic - unable to open /dev/zero\n";
/* I wrote this back before I had printf... maybe it should disappear. */
void _ldverify(int test, const char *msg)
{
if (test)
{
(void)write(STDERR_FILENO, msg, strlen(msg));
exit(LD_ERR_EXIT);
}
}
/* This function simply attempts to open /dev/zero, exiting if the call
* to open failed. The file descriptor of the newly opened file is
* returned. */
int _ldzero()
{
int zfd;
if ((zfd = open("/dev/zero", O_RDONLY, 0)) < 0)
{
printf("%s", err_zero);
exit(1);
}
return zfd;
}
/* This is the hash operation used for the string-to-symbol hash
* table in dynamic ELF binaries. This function is taken more or less
* directly from the LLM */
unsigned long _ldelfhash(const char *name)
{
uint32_t h = 0, g;
while (*name)
{
h = (h << 4) + *name++;
/* LINTED */
if ((g = h & 0xf0000000))
h ^= g >> 24;
h &= ~g;
}
return h;
}
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