The branch main has been updated by adrian:
URL:
https://cgit.FreeBSD.org/src/commit/?id=bd72252aace382921840ddbceea712b96f4ad242
commit bd72252aace382921840ddbceea712b96f4ad242
Author: Adrian Chadd <adr...@freebsd.org>
AuthorDate: 2021-01-12 21:13:20 +0000
Commit: Adrian Chadd <adr...@freebsd.org>
CommitDate: 2021-01-14 07:03:53 +0000
[mips] revert r366664 - flip mips back from -O2 to -O
Now that I have -head fitting in 8MB of flash again, I can test
out freebsd-head on my home AP test setup. Unfortunately,
the introduction of -O2 in r366664 causes the following infinite
loop shortly after boot:
------
MAP: No valid partition found at map/rootfs.uzip
Warning: no time-of-day clock registered, system time will not be set
accurately
start_init: trying /sbin/init
BAD_PAGE_FAULT: pid 1 tid 100001 (init), uid 0: pc 0x4042c320 got a read
fault (type 0x2) at 0x2e3a0
Trapframe Register Dump:
zero: 0 at: 0 v0: 0 v1: 0
a0: 0x1af34 a1: 0 a2: 0 a3: 0x7fffeff0
t0: 0 t1: 0 t2: 0 t3: 0
t4: 0 t5: 0 t6: 0 t7: 0
t8: 0 t9: 0x152e8 s0: 0x7fffee84 s1: 0
s2: 0 s3: 0 s4: 0 s5: 0
s6: 0 s7: 0 k0: 0 k1: 0
gp: 0x362c0 sp: 0x7fffedf0 s8: 0 ra: 0x40417df0
sr: 0xf413 mullo: 0 mulhi: 0 badvaddr: 0x2e3a0
cause: 0xffffffff80000008 pc: 0x4042c31c
Page table info for pc address 0x4042c320: pde = 0x80712000, pte =
0xa002065a
Dumping 4 words starting at pc address 0x4042c320:
8f9980e0 80820000 10400067 00809825
Page table info for bad address 0x2e3a0: pde = 0, pte = 0
------
I'm not yet sure why, but until I figure it out with the mips64/cheri
folk this should be reverted.
This should only use -O on GCC generated code for MIPS platforms.
Tested:
* QCA934x (mips74k) - WDR-3600/WDR-4300 APs
Differential Revision: https://reviews.freebsd.org/D28122
---
share/mk/sys.mk | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/share/mk/sys.mk b/share/mk/sys.mk
index 8f456b28593a..72f458397683 100644
--- a/share/mk/sys.mk
+++ b/share/mk/sys.mk
@@ -166,7 +166,14 @@ CC ?= c89
CFLAGS ?= -O
.else
CC ?= cc
+.if ${MACHINE_CPUARCH} == "mips" && ${COMPILER_TYPE} == "gcc"
+# Note: there are currently issues generating code gcc-6.x targeting
+# code for at least mips32. The system hits infinite page faults
+# when starting /sbin/init if -O2 is used.
+CFLAGS ?= -O -pipe
+.else
CFLAGS ?= -O2 -pipe
+.endif
.if defined(NO_STRICT_ALIASING)
CFLAGS += -fno-strict-aliasing
.endif
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