swap stack fix patch
This commit is contained in:
Gerd Hoffmann
parent
729059caf6
commit
3a213ee2a1
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@ -1,66 +0,0 @@
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From 16974ba9c90984e667f057e13630cea6c27d0ae9 Mon Sep 17 00:00:00 2001
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From: Gerd Hoffmann <kraxel@redhat.com>
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Date: Tue, 7 Jun 2022 14:24:59 +0200
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Subject: [PATCH 21/21] OvmfPkg/Sec: fix stack switch
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The ebp/rbp register can either be used for the frame pointer or
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as general purpose register. With gcc (and clang) this depends
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on the -f(no-)omit-frame-pointer switch.
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This patch updates tools_def.template to explicitly set the compiler
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option and also add a define to allow conditionally compile code.
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The new define is used to fix stack switching in TemporaryRamMigration.
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The ebp/rbp must not be touched when the compiler can use it as general
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purpose register. With version 12 gcc starts actually using the
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register, so changing it leads to firmware crashes in some
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configurations.
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Ref: https://bugzilla.tianocore.org/show_bug.cgi?id=3934
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Reported-by: Jiri Slaby <jirislaby@kernel.org>
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Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
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---
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OvmfPkg/Sec/SecMain.c | 4 ++++
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BaseTools/Conf/tools_def.template | 6 +++---
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2 files changed, 7 insertions(+), 3 deletions(-)
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diff --git a/OvmfPkg/Sec/SecMain.c b/OvmfPkg/Sec/SecMain.c
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index 1167d22a68cc..3ca0dcdfd3dd 100644
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--- a/OvmfPkg/Sec/SecMain.c
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+++ b/OvmfPkg/Sec/SecMain.c
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@@ -1052,11 +1052,15 @@ TemporaryRamMigration (
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if (SetJump (&JumpBuffer) == 0) {
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#if defined (MDE_CPU_IA32)
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JumpBuffer.Esp = JumpBuffer.Esp + DebugAgentContext.StackMigrateOffset;
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+ #ifndef OMIT_FRAME_POINTER
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JumpBuffer.Ebp = JumpBuffer.Ebp + DebugAgentContext.StackMigrateOffset;
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#endif
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+ #endif
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#if defined (MDE_CPU_X64)
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JumpBuffer.Rsp = JumpBuffer.Rsp + DebugAgentContext.StackMigrateOffset;
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+ #ifndef OMIT_FRAME_POINTER
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JumpBuffer.Rbp = JumpBuffer.Rbp + DebugAgentContext.StackMigrateOffset;
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+ #endif
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#endif
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LongJump (&JumpBuffer, (UINTN)-1);
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}
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diff --git a/BaseTools/Conf/tools_def.template b/BaseTools/Conf/tools_def.template
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index 5901d9eecb5d..3b5f1f915c96 100755
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--- a/BaseTools/Conf/tools_def.template
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+++ b/BaseTools/Conf/tools_def.template
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@@ -1849,9 +1849,9 @@ NOOPT_*_*_OBJCOPY_ADDDEBUGFLAG = --add-gnu-debuglink=$(DEBUG_DIR)/$(MODULE_N
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*_*_*_DTC_PATH = DEF(DTC_BIN)
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DEFINE GCC_ALL_CC_FLAGS = -g -Os -fshort-wchar -fno-builtin -fno-strict-aliasing -Wall -Werror -Wno-array-bounds -include AutoGen.h -fno-common
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-DEFINE GCC_IA32_CC_FLAGS = DEF(GCC_ALL_CC_FLAGS) -m32 -malign-double -freorder-blocks -freorder-blocks-and-partition -O2 -mno-stack-arg-probe
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-DEFINE GCC_X64_CC_FLAGS = DEF(GCC_ALL_CC_FLAGS) -mno-red-zone -Wno-address -mno-stack-arg-probe
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-DEFINE GCC_ARM_CC_FLAGS = DEF(GCC_ALL_CC_FLAGS) -mlittle-endian -mabi=aapcs -fno-short-enums -funsigned-char -ffunction-sections -fdata-sections -fomit-frame-pointer -Wno-address -mthumb -mfloat-abi=soft -fno-pic -fno-pie
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+DEFINE GCC_IA32_CC_FLAGS = DEF(GCC_ALL_CC_FLAGS) -m32 -malign-double -freorder-blocks -freorder-blocks-and-partition -O2 -mno-stack-arg-probe -fno-omit-frame-pointer
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+DEFINE GCC_X64_CC_FLAGS = DEF(GCC_ALL_CC_FLAGS) -mno-red-zone -Wno-address -mno-stack-arg-probe -fomit-frame-pointer -DOMIT_FRAME_POINTER=1
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+DEFINE GCC_ARM_CC_FLAGS = DEF(GCC_ALL_CC_FLAGS) -mlittle-endian -mabi=aapcs -fno-short-enums -funsigned-char -ffunction-sections -fdata-sections -fomit-frame-pointer -DOMIT_FRAME_POINTER=1 -Wno-address -mthumb -mfloat-abi=soft -fno-pic -fno-pie
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DEFINE GCC_ARM_CC_XIPFLAGS = -mno-unaligned-access
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DEFINE GCC_AARCH64_CC_FLAGS = DEF(GCC_ALL_CC_FLAGS) -mlittle-endian -fno-short-enums -fverbose-asm -funsigned-char -ffunction-sections -fdata-sections -Wno-address -fno-asynchronous-unwind-tables -fno-unwind-tables -fno-pic -fno-pie -ffixed-x18
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DEFINE GCC_AARCH64_CC_XIPFLAGS = -mstrict-align -mgeneral-regs-only
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--
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2.36.1
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@ -0,0 +1,32 @@
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From 46c6d0e6a1d971edef5846e352a81a097f8d51d5 Mon Sep 17 00:00:00 2001
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From: Gerd Hoffmann <kraxel@redhat.com>
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Date: Fri, 10 Jun 2022 07:43:15 +0200
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Subject: [PATCH 21/21] tools_def: add -fno-omit-frame-pointer to
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GCC48_{IA32,X64}_CC_FLAGS
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Fixes problems due to code assuming it runs with frame pointers and thus
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updates rbp / ebp registers when switching stacks.
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Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
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---
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BaseTools/Conf/tools_def.template | 4 ++--
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1 file changed, 2 insertions(+), 2 deletions(-)
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diff --git a/BaseTools/Conf/tools_def.template b/BaseTools/Conf/tools_def.template
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index 5901d9eecb5d..e3aa88fec31f 100755
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--- a/BaseTools/Conf/tools_def.template
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+++ b/BaseTools/Conf/tools_def.template
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@@ -1884,8 +1884,8 @@ DEFINE GCC_DEPS_FLAGS = -MMD -MF $@.deps
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DEFINE GCC48_ALL_CC_FLAGS = DEF(GCC_ALL_CC_FLAGS) -ffunction-sections -fdata-sections -DSTRING_ARRAY_NAME=$(BASE_NAME)Strings
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DEFINE GCC48_IA32_X64_DLINK_COMMON = -nostdlib -Wl,-n,-q,--gc-sections -z common-page-size=0x20
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-DEFINE GCC48_IA32_CC_FLAGS = DEF(GCC48_ALL_CC_FLAGS) -m32 -march=i586 -malign-double -fno-stack-protector -D EFI32 -fno-asynchronous-unwind-tables -Wno-address
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-DEFINE GCC48_X64_CC_FLAGS = DEF(GCC48_ALL_CC_FLAGS) -m64 -fno-stack-protector "-DEFIAPI=__attribute__((ms_abi))" -maccumulate-outgoing-args -mno-red-zone -Wno-address -mcmodel=small -fpie -fno-asynchronous-unwind-tables -Wno-address
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+DEFINE GCC48_IA32_CC_FLAGS = DEF(GCC48_ALL_CC_FLAGS) -m32 -march=i586 -malign-double -fno-stack-protector -D EFI32 -fno-asynchronous-unwind-tables -Wno-address -fno-omit-frame-pointer
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+DEFINE GCC48_X64_CC_FLAGS = DEF(GCC48_ALL_CC_FLAGS) -m64 -fno-stack-protector "-DEFIAPI=__attribute__((ms_abi))" -maccumulate-outgoing-args -mno-red-zone -Wno-address -mcmodel=small -fpie -fno-asynchronous-unwind-tables -Wno-address -fno-omit-frame-pointer
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DEFINE GCC48_IA32_X64_ASLDLINK_FLAGS = DEF(GCC48_IA32_X64_DLINK_COMMON) -Wl,--entry,ReferenceAcpiTable -u ReferenceAcpiTable
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DEFINE GCC48_IA32_X64_DLINK_FLAGS = DEF(GCC48_IA32_X64_DLINK_COMMON) -Wl,--entry,$(IMAGE_ENTRY_POINT) -u $(IMAGE_ENTRY_POINT) -Wl,-Map,$(DEST_DIR_DEBUG)/$(BASE_NAME).map,--whole-archive
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DEFINE GCC48_IA32_DLINK2_FLAGS = -Wl,--defsym=PECOFF_HEADER_SIZE=0x220 DEF(GCC_DLINK2_FLAGS_COMMON)
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--
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2.36.1
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@ -35,7 +35,7 @@ ExclusiveArch: x86_64 aarch64
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Name: edk2
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Version: %{GITDATE}git%{GITCOMMIT}
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Release: 2%{?dist}
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Release: 3%{?dist}
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Summary: UEFI firmware for 64-bit virtual machines
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License: BSD-2-Clause-Patent and OpenSSL and MIT
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URL: http://www.tianocore.org
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@ -85,7 +85,7 @@ Patch0017: 0017-CryptoPkg-OpensslLib-list-RHEL8-specific-OpenSSL-fil.patch
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Patch0018: 0018-OvmfPkg-QemuKernelLoaderFsDxe-suppress-error-on-no-k.patch
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Patch0019: 0019-SecurityPkg-Tcg2Dxe-suppress-error-on-no-swtpm-in-si.patch
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Patch0020: 0020-Tweak-the-tools_def-to-support-cross-compiling.patch
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Patch0021: 0021-OvmfPkg-Sec-fix-stack-switch.patch
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Patch0021: 0021-tools_def-add-fno-omit-frame-pointer-to-GCC48_-IA32-.patch
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# python3-devel and libuuid-devel are required for building tools.
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# python3-devel is also needed for varstore template generation and
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@ -707,6 +707,9 @@ virt-fw-vars --input Build/Ovmf3264/DEBUG_%{TOOLCHAIN}/FV/OVMF_VARS.secboot.fd \
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%changelog
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* Fri Jun 10 2022 Gerd Hoffmann <kraxel@redhat.com> - 20220526git16779ede2d36-3
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- swap stack fix patch.
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* Wed Jun 08 2022 Gerd Hoffmann <kraxel@redhat.com> - 20220526git16779ede2d36-2
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- fix PcdResizeXterm patch.
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- minor specfile cleanup.
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