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seoul: fix region conflicts 

At least 64bit Seoul dies with Region_conflict reliable and reproducible.

When during startup of Seoul some Genode code (caused by executing some
constructors) try to attach a region, the region manager code in the rm_session
will try to place the attachment at the smallest large enough aligned free
virtual region.

For now, I observed one attachment causing trouble (but not knowing who causes
this - it does also not really matter). The questionable region is 0x4000 of
size for 32bit and 0x8000 of size for 64bit.

To steer the region manager a bit, we try now following trick:

With this commit the load address of the binary for 32 and 64 bit is moved
close to the end of the virtual address space, but leaving enough free virtual
space for the above observed attachment (and a bit more).

The region manager code now will try to fill up the virtual region behind
the binary up to the end of the virtual address space, effectively letting the
lower virtual region untouched - hopefully.

Works for now, but it will break again - for sure.

Fixes #519
This commit is contained in:
Alexander Boettcher 2013-08-09 12:05:30 +02:00 committed by Norman Feske
parent 32e3eee48c
commit 009adff441
3 changed files with 15 additions and 5 deletions
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5
ports/src/vancouver/32bit/target.mk Normal file
View File

@ -0,0 +1,5 @@
REQUIRES = 32bit
LD_TEXT_ADDR = 0xbf800000
include $(REP_DIR)/src/vancouver/target.inc

5
ports/src/vancouver/64bit/target.mk Normal file
View File

@ -0,0 +1,5 @@
REQUIRES = 64bit
LD_TEXT_ADDR = 0x7fffff800000
include $(REP_DIR)/src/vancouver/target.inc

10
ports/src/vancouver/target.mk → ports/src/vancouver/target.inc
View File

@ -5,7 +5,7 @@ VANCOUVER_DIR = $(CONTRIB_DIR)
GENODE_DIR = $(CONTRIB_DIR)/genode
NOVA_INCLUDE_DIR = $(REP_DIR)/contrib/seoul-git/include
REQUIRES = nova
REQUIRES += nova
ifeq ($(wildcard $(VANCOUVER_DIR)),)
REQUIRES += prepare_ports_vancouver
@ -29,8 +29,8 @@ SRC_CC += $(filter-out $(FILTER_OUT),$(addprefix model/,$(MODEL_SRC_CC)))
SRC_CC += $(filter-out $(FILTER_OUT),$(addprefix executor/,$(EXECUTOR_SRC_CC)))
SRC_CC += model/sink.cc
INC_DIR += $(PRG_DIR)
INC_DIR += $(PRG_DIR)/executor
INC_DIR += $(PRG_DIR)/..
INC_DIR += $(PRG_DIR)/../executor
INC_DIR += $(VANCOUVER_DIR)/model
INC_DIR += $(VANCOUVER_DIR)/executor
INC_DIR += $(VANCOUVER_DIR)/include $(GENODE_DIR)/include
@ -39,7 +39,7 @@ INC_DIR += $(NOVA_INCLUDE_DIR)
CC_WARN += -Wno-parentheses
CC_CXX_OPT += -std=gnu++11
LD_TEXT_ADDR = 0xb0000000
vpath %.cc $(VANCOUVER_DIR)
vpath %.cc $(CONTRIB_DIR)
vpath %.cc $(PRG_DIR)/..
vpath %.tff $(PRG_DIR)/..