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util/nvmutil: portable gettimeofday

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Signed-off-by: Leah Rowe <leah@libreboot.org>
This commit is contained in:
Leah Rowe
2026-03-16 15:21:59 +00:00
parent 4ecce163d6
commit 139f19f867
1 changed files with 19 additions and 3 deletions
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22
util/nvmutil/nvmutil.c
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@@ -373,6 +373,7 @@ static ushort hextonum(char ch_s);
static ushort rhex(void);
static ushort read_urandom(void);
static ulong entropy_jitter(void);
static int x_i_gettimeofday(struct timeval *tv, void *tz);
static void write_mac_part(size_t partnum);
/*
@@ -1356,7 +1357,7 @@ rhex(void)
/* Fallback */
gettimeofday(&tv, NULL);
x_i_gettimeofday(&tv, NULL);
mix = (ulong)tv.tv_sec
^ (ulong)tv.tv_usec
@@ -1421,9 +1422,9 @@ entropy_jitter(void)
int i;
for (i = 0; i < 8; i++) {
gettimeofday(&a, NULL);
x_i_gettimeofday(&a, NULL);
getpid();
gettimeofday(&b, NULL);
x_i_gettimeofday(&b, NULL);
/*
* prevent negative numbers to prevent overflow,
@@ -1440,6 +1441,21 @@ entropy_jitter(void)
return mix;
}
static int
x_i_gettimeofday(struct timeval *tv, void *tz)
{
time_t t;
(void)tz;
t = time(NULL);
tv->tv_sec = t;
tv->tv_usec = (long)clock() % 1000000;
return 0;
}
static void
write_mac_part(size_t partnum)
{