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x86: print more detail on non-present pagefaults

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The CPU sets the relevant bits on who tried to do what
if the page wasn't present, print them.

Signed-off-by: Andrew Boie <andrew.p.boie@intel.com>
This commit is contained in:
Andrew Boie 2020-09-06 10:55:35 -07:00 • committed by Anas Nashif
commit 2bc21ea4de
1 changed files with 3 additions and 2 deletions
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5
arch/x86/core/fatal.c
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@ -308,9 +308,10 @@ static void dump_page_fault(z_arch_esf_t *esf)
if ((err & RSVD) != 0) {
LOG_ERR("Reserved bits set in page tables");
} else if ((err & PRESENT) == 0) {
LOG_ERR("Linear address not present in page tables");
} else {
if ((err & PRESENT) == 0) {
LOG_ERR("Linear address not present in page tables");
}
LOG_ERR("Access violation: %s thread not allowed to %s",
(err & US) != 0U ? "user" : "supervisor",
(err & ID) != 0U ? "execute" : ((err & WR) != 0U ?