diff options
| -rw-r--r-- | .gitlab-ci.yml | 4 | ||||
| -rwxr-xr-x | configure | 2 | ||||
| -rw-r--r-- | docs/system/gdb.rst | 63 | ||||
| -rw-r--r-- | tests/docker/Makefile.include | 5 | ||||
| -rw-r--r-- | tests/docker/dockerfiles/centos8.docker | 1 | ||||
| -rwxr-xr-x | tests/tcg/configure.sh | 42 | ||||
| -rw-r--r-- | tests/tcg/i386/Makefile.target | 16 | ||||
| -rw-r--r-- | tests/tcg/i386/system/kernel.ld | 2 | ||||
| -rw-r--r-- | tests/tcg/multiarch/gdbstub/sha1.py | 5 |
9 files changed, 126 insertions, 14 deletions
diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml index 3480d79..52d65d6 100644 --- a/.gitlab-ci.yml +++ b/.gitlab-ci.yml @@ -42,7 +42,7 @@ include: image: $CI_REGISTRY_IMAGE/qemu/$IMAGE:latest script: - scripts/git-submodule.sh update - $(grep GIT_SUBMODULES build/config-host.mak | sed 's/GIT_SUBMODULES=//') + $(sed -n '/GIT_SUBMODULES=/ s/.*=// p' build/config-host.mak) - cd build - find . -type f -exec touch {} + # Avoid recompiling by hiding ninja with NINJA=":" @@ -223,7 +223,7 @@ build-system-centos: variables: IMAGE: centos8 CONFIGURE_ARGS: --disable-nettle --enable-gcrypt --enable-fdt=system - --enable-modules + --enable-modules --enable-trace-backends=dtrace TARGETS: ppc64-softmmu or1k-softmmu s390x-softmmu x86_64-softmmu rx-softmmu sh4-softmmu nios2-softmmu MAKE_CHECK_ARGS: check-build @@ -6299,7 +6299,7 @@ done (for i in $cross_cc_vars; do export $i done -export target_list source_path use_containers +export target_list source_path use_containers ARCH $source_path/tests/tcg/configure.sh) # temporary config to build submodules diff --git a/docs/system/gdb.rst b/docs/system/gdb.rst index 72b1e68..144d083 100644 --- a/docs/system/gdb.rst +++ b/docs/system/gdb.rst @@ -45,7 +45,66 @@ Here are some useful tips in order to use gdb on system code: 3. Use ``set architecture i8086`` to dump 16 bit code. Then use ``x/10i $cs*16+$eip`` to dump the code at the PC position. -Advanced debugging options: +Debugging multicore machines +============================ + +GDB's abstraction for debugging targets with multiple possible +parallel flows of execution is a two layer one: it supports multiple +"inferiors", each of which can have multiple "threads". When the QEMU +machine has more than one CPU, QEMU exposes each CPU cluster as a +separate "inferior", where each CPU within the cluster is a separate +"thread". Most QEMU machine types have identical CPUs, so there is a +single cluster which has all the CPUs in it. A few machine types are +heterogenous and have multiple clusters: for example the ``sifive_u`` +machine has a cluster with one E51 core and a second cluster with four +U54 cores. Here the E51 is the only thread in the first inferior, and +the U54 cores are all threads in the second inferior. + +When you connect gdb to the gdbstub, it will automatically +connect to the first inferior; you can display the CPUs in this +cluster using the gdb ``info thread`` command, and switch between +them using gdb's usual thread-management commands. + +For multi-cluster machines, unfortunately gdb does not by default +handle multiple inferiors, and so you have to explicitly connect +to them. First, you must connect with the ``extended-remote`` +protocol, not ``remote``:: + + (gdb) target extended-remote localhost:1234 + +Once connected, gdb will have a single inferior, for the +first cluster. You need to create inferiors for the other +clusters and attach to them, like this:: + + (gdb) add-inferior + Added inferior 2 + (gdb) inferior 2 + [Switching to inferior 2 [<null>] (<noexec>)] + (gdb) attach 2 + Attaching to process 2 + warning: No executable has been specified and target does not support + determining executable automatically. Try using the "file" command. + 0x00000000 in ?? () + +Once you've done this, ``info threads`` will show CPUs in +all the clusters you have attached to:: + + (gdb) info threads + Id Target Id Frame + 1.1 Thread 1.1 (cortex-m33-arm-cpu cpu [running]) 0x00000000 in ?? () + * 2.1 Thread 2.2 (cortex-m33-arm-cpu cpu [halted ]) 0x00000000 in ?? () + +You probably also want to set gdb to ``schedule-multiple`` mode, +so that when you tell gdb to ``continue`` it resumes all CPUs, +not just those in the cluster you are currently working on:: + + (gdb) set schedule-multiple on + +Advanced debugging options +========================== + +Changing single-stepping behaviour +^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ The default single stepping behavior is step with the IRQs and timer service routines off. It is set this way because when gdb executes a @@ -88,6 +147,8 @@ three commands you can query and set the single step behavior: sending: "qemu.sstep=0x5" received: "OK" +Examining physical memory +^^^^^^^^^^^^^^^^^^^^^^^^^ Another feature that QEMU gdbstub provides is to toggle the memory GDB works with, by default GDB will show the current process memory respecting diff --git a/tests/docker/Makefile.include b/tests/docker/Makefile.include index 7cab761..9f464cb 100644 --- a/tests/docker/Makefile.include +++ b/tests/docker/Makefile.include @@ -16,7 +16,10 @@ DOCKER_IMAGES := $(sort $(notdir $(basename $(wildcard $(DOCKER_FILES_DIR)/*.doc DOCKER_TARGETS := $(patsubst %,docker-image-%,$(DOCKER_IMAGES)) # Use a global constant ccache directory to speed up repetitive builds DOCKER_CCACHE_DIR := $$HOME/.cache/qemu-docker-ccache -DOCKER_REGISTRY := $(if $(REGISTRY),$(REGISTRY),registry.gitlab.com/qemu-project/qemu) +ifeq ($(HOST_ARCH),x86_64) +DOCKER_DEFAULT_REGISTRY := registry.gitlab.com/qemu-project/qemu +endif +DOCKER_REGISTRY := $(if $(REGISTRY),$(REGISTRY),$(DOCKER_DEFAULT_REGISTRY)) DOCKER_TESTS := $(notdir $(shell \ find $(SRC_PATH)/tests/docker/ -name 'test-*' -type f)) diff --git a/tests/docker/dockerfiles/centos8.docker b/tests/docker/dockerfiles/centos8.docker index a763d55..a8c6c52 100644 --- a/tests/docker/dockerfiles/centos8.docker +++ b/tests/docker/dockerfiles/centos8.docker @@ -29,6 +29,7 @@ ENV PACKAGES \ rdma-core-devel \ spice-glib-devel \ spice-server \ + systemtap-sdt-devel \ tar \ zlib-devel diff --git a/tests/tcg/configure.sh b/tests/tcg/configure.sh index ce304f4..fa1a426 100755 --- a/tests/tcg/configure.sh +++ b/tests/tcg/configure.sh @@ -52,7 +52,7 @@ fi : ${cross_cc_hexagon="hexagon-unknown-linux-musl-clang"} : ${cross_cc_cflags_hexagon="-mv67 -O2 -static"} : ${cross_cc_hppa="hppa-linux-gnu-gcc"} -: ${cross_cc_i386="i386-pc-linux-gnu-gcc"} +: ${cross_cc_i386="i686-linux-gnu-gcc"} : ${cross_cc_cflags_i386="-m32"} : ${cross_cc_m68k="m68k-linux-gnu-gcc"} : $(cross_cc_mips64el="mips64el-linux-gnuabi64-gcc") @@ -69,7 +69,7 @@ fi : ${cross_cc_cflags_sparc="-m32 -mv8plus -mcpu=ultrasparc"} : ${cross_cc_sparc64="sparc64-linux-gnu-gcc"} : ${cross_cc_cflags_sparc64="-m64 -mcpu=ultrasparc"} -: ${cross_cc_x86_64="x86_64-pc-linux-gnu-gcc"} +: ${cross_cc_x86_64="x86_64-linux-gnu-gcc"} : ${cross_cc_cflags_x86_64="-m64"} for target in $target_list; do @@ -108,79 +108,103 @@ for target in $target_list; do case $target in aarch64-*) # We don't have any bigendian build tools so we only use this for AArch64 + container_hosts="x86_64 aarch64" container_image=debian-arm64-test-cross container_cross_cc=aarch64-linux-gnu-gcc-10 ;; alpha-*) + container_hosts=x86_64 container_image=debian-alpha-cross container_cross_cc=alpha-linux-gnu-gcc ;; arm-*) # We don't have any bigendian build tools so we only use this for ARM + container_hosts="x86_64 aarch64" container_image=debian-armhf-cross container_cross_cc=arm-linux-gnueabihf-gcc ;; cris-*) + container_hosts=x86_64 container_image=fedora-cris-cross container_cross_cc=cris-linux-gnu-gcc ;; hppa-*) + container_hosts=x86_64 container_image=debian-hppa-cross container_cross_cc=hppa-linux-gnu-gcc ;; i386-*) + container_hosts=x86_64 container_image=fedora-i386-cross container_cross_cc=gcc ;; m68k-*) + container_hosts=x86_64 container_image=debian-m68k-cross container_cross_cc=m68k-linux-gnu-gcc ;; mips64el-*) + container_hosts=x86_64 container_image=debian-mips64el-cross container_cross_cc=mips64el-linux-gnuabi64-gcc ;; mips64-*) + container_hosts=x86_64 container_image=debian-mips64-cross container_cross_cc=mips64-linux-gnuabi64-gcc ;; mipsel-*) + container_hosts=x86_64 container_image=debian-mipsel-cross container_cross_cc=mipsel-linux-gnu-gcc ;; mips-*) + container_hosts=x86_64 container_image=debian-mips-cross container_cross_cc=mips-linux-gnu-gcc ;; ppc-*|ppc64abi32-*) + container_hosts=x86_64 container_image=debian-powerpc-cross container_cross_cc=powerpc-linux-gnu-gcc ;; ppc64-*) + container_hosts=x86_64 container_image=debian-ppc64-cross container_cross_cc=powerpc64-linux-gnu-gcc ;; ppc64le-*) + container_hosts=x86_64 container_image=debian-ppc64el-cross container_cross_cc=powerpc64le-linux-gnu-gcc ;; riscv64-*) + container_hosts=x86_64 container_image=debian-riscv64-cross container_cross_cc=riscv64-linux-gnu-gcc ;; s390x-*) + container_hosts=x86_64 container_image=debian-s390x-cross container_cross_cc=s390x-linux-gnu-gcc ;; sh4-*) + container_hosts=x86_64 container_image=debian-sh4-cross container_cross_cc=sh4-linux-gnu-gcc ;; sparc64-*) + container_hosts=x86_64 container_image=debian-sparc64-cross container_cross_cc=sparc64-linux-gnu-gcc ;; + x86_64-*) + container_hosts="aarch64 ppc64el x86_64" + container_image=debian-amd64-cross + container_cross_cc=x86_64-linux-gnu-gcc + ;; xtensa*-softmmu) + container_hosts=x86_64 container_image=debian-xtensa-cross # default to the dc232b cpu @@ -257,6 +281,12 @@ for target in $target_list; do echo "CROSS_CC_HAS_POWER8_VECTOR=y" >> $config_target_mak fi ;; + i386-linux-user) + if do_compiler "$target_compiler" $target_compiler_cflags \ + -Werror -fno-pie -o $TMPE $TMPC; then + echo "CROSS_CC_HAS_I386_NOPIE=y" >> $config_target_mak + fi + ;; esac enabled_cross_compilers="$enabled_cross_compilers $target_compiler" @@ -265,7 +295,11 @@ for target in $target_list; do done if test $got_cross_cc = no && test "$container" != no && test -n "$container_image"; then - echo "DOCKER_IMAGE=$container_image" >> $config_target_mak - echo "DOCKER_CROSS_CC_GUEST=$container_cross_cc" >> $config_target_mak + for host in $container_hosts; do + if test "$host" = "$ARCH"; then + echo "DOCKER_IMAGE=$container_image" >> $config_target_mak + echo "DOCKER_CROSS_CC_GUEST=$container_cross_cc" >> $config_target_mak + fi + done fi done diff --git a/tests/tcg/i386/Makefile.target b/tests/tcg/i386/Makefile.target index c4a6f91..f7efaab 100644 --- a/tests/tcg/i386/Makefile.target +++ b/tests/tcg/i386/Makefile.target @@ -27,13 +27,23 @@ run-plugin-test-i386-bmi2-%: QEMU_OPTS += -cpu max hello-i386: CFLAGS+=-ffreestanding hello-i386: LDFLAGS+=-nostdlib -# -# test-386 includes a couple of additional objects that need to be linked together -# +# test-386 includes a couple of additional objects that need to be +# linked together, we also need a no-pie capable compiler due to the +# non-pic calls into 16-bit mode +ifneq ($(DOCKER_IMAGE)$(CROSS_CC_HAS_I386_NOPIE),) +test-i386: CFLAGS += -fno-pie test-i386: test-i386.c test-i386-code16.S test-i386-vm86.S test-i386.h test-i386-shift.h test-i386-muldiv.h $(CC) $(CFLAGS) $(LDFLAGS) $(EXTRA_CFLAGS) -o $@ \ $(<D)/test-i386.c $(<D)/test-i386-code16.S $(<D)/test-i386-vm86.S -lm +else +test-i386: + $(call skip-test, "BUILD of $@", "missing -no-pie compiler support") +run-test-i386: + $(call skip-test, "RUN of test-i386", "not built") +run-plugin-test-i386-with-%: + $(call skip-test, "RUN of test-i386 ($*)", "not built") +endif ifeq ($(SPEED), slow) diff --git a/tests/tcg/i386/system/kernel.ld b/tests/tcg/i386/system/kernel.ld index 92de525..27ea5bb 100644 --- a/tests/tcg/i386/system/kernel.ld +++ b/tests/tcg/i386/system/kernel.ld @@ -12,7 +12,7 @@ SECTIONS { } .data : { - *(.data) + *(.data*) __load_en = .; } diff --git a/tests/tcg/multiarch/gdbstub/sha1.py b/tests/tcg/multiarch/gdbstub/sha1.py index 2bfde49..423b720 100644 --- a/tests/tcg/multiarch/gdbstub/sha1.py +++ b/tests/tcg/multiarch/gdbstub/sha1.py @@ -40,7 +40,10 @@ def run_test(): check_break("SHA1Init") - # check step and inspect values + # Check step and inspect values. We do a double next after the + # breakpoint as depending on the version of gdb we may step the + # preamble and not the first actual line of source. + gdb.execute("next") gdb.execute("next") val_ctx = gdb.parse_and_eval("context->state[0]") exp_ctx = 0x67452301 |