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authorAndrew Turner <andrew@FreeBSD.org>2020-05-18 15:05:59 +0000
committerAndrew Turner <andrew@FreeBSD.org>2020-05-18 15:05:59 +0000
commitbc71118183ddd2493c6c8ce4511da3a2e8368804 (patch)
tree1d30d9f9d705df8f4a46138810938f50dccd03a6 /usr.sbin
parente90337e48fca985d6eea95989f05476f35b5b93c (diff)
downloadsrc-bc71118183ddd2493c6c8ce4511da3a2e8368804.tar.gz
src-bc71118183ddd2493c6c8ce4511da3a2e8368804.zip
Allow the FACS and XFACS to be zero in acpidump.
These are allowed to be zero when the hardware reduced APCI flag is set Sponsored by: Innovate UK Differential Revision: https://reviews.freebsd.org/D23207
Notes
Notes: svn path=/head/; revision=361216
Diffstat (limited to 'usr.sbin')
-rw-r--r--usr.sbin/acpi/acpidump/acpi.c16
1 files changed, 11 insertions, 5 deletions
diff --git a/usr.sbin/acpi/acpidump/acpi.c b/usr.sbin/acpi/acpidump/acpi.c
index 578a5886d500..bc8d693389f7 100644
--- a/usr.sbin/acpi/acpidump/acpi.c
+++ b/usr.sbin/acpi/acpidump/acpi.c
@@ -245,6 +245,7 @@ acpi_handle_fadt(ACPI_TABLE_HEADER *sdp)
ACPI_TABLE_HEADER *dsdp;
ACPI_TABLE_FACS *facs;
ACPI_TABLE_FADT *fadt;
+ vm_offset_t addr;
int fadt_revision;
fadt = (ACPI_TABLE_FADT *)sdp;
@@ -252,12 +253,17 @@ acpi_handle_fadt(ACPI_TABLE_HEADER *sdp)
fadt_revision = acpi_get_fadt_revision(fadt);
if (fadt_revision == 1)
- facs = (ACPI_TABLE_FACS *)acpi_map_sdt(fadt->Facs);
+ addr = fadt->Facs;
else
- facs = (ACPI_TABLE_FACS *)acpi_map_sdt(fadt->XFacs);
- if (memcmp(facs->Signature, ACPI_SIG_FACS, 4) != 0 || facs->Length < 64)
- errx(1, "FACS is corrupt");
- acpi_print_facs(facs);
+ addr = fadt->XFacs;
+ if (addr != 0) {
+ facs = (ACPI_TABLE_FACS *)acpi_map_sdt(addr);
+
+ if (memcmp(facs->Signature, ACPI_SIG_FACS, 4) != 0 ||
+ facs->Length < 64)
+ errx(1, "FACS is corrupt");
+ acpi_print_facs(facs);
+ }
if (fadt_revision == 1)
dsdp = (ACPI_TABLE_HEADER *)acpi_map_sdt(fadt->Dsdt);