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From: Sasha Levin <sashal@kernel.org>
To: linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc: Nick Desaulniers <ndesaulniers@google.com>,
	Peter Collingbourne <pcc@google.com>,
	Nathan Chancellor <nathan@kernel.org>,
	Will Deacon <will@kernel.org>, Sasha Levin <sashal@kernel.org>,
	linux-kbuild@vger.kernel.org
Subject: [PATCH AUTOSEL 5.13 49/85] Makefile: fix GDB warning with CONFIG_RELR
Date: Sun,  4 Jul 2021 19:03:44 -0400	[thread overview]
Message-ID: <20210704230420.1488358-49-sashal@kernel.org> (raw)
In-Reply-To: <20210704230420.1488358-1-sashal@kernel.org>

From: Nick Desaulniers <ndesaulniers@google.com>

[ Upstream commit 27f2a4db76e8d8a8b601fc1c6a7a17f88bd907ab ]

GDB produces the following warning when debugging kernels built with
CONFIG_RELR:

BFD: /android0/linux-next/vmlinux: unknown type [0x13] section `.relr.dyn'

when loading a kernel built with CONFIG_RELR into GDB. It can also
prevent debugging symbols using such relocations.

Peter sugguests:
  [That flag] means that lld will use dynamic tags and section type
  numbers in the OS-specific range rather than the generic range. The
  kernel itself doesn't care about these numbers; it determines the
  location of the RELR section using symbols defined by a linker script.

Link: https://github.com/ClangBuiltLinux/linux/issues/1057
Suggested-by: Peter Collingbourne <pcc@google.com>
Reviewed-by: Nathan Chancellor <nathan@kernel.org>
Signed-off-by: Nick Desaulniers <ndesaulniers@google.com>
Link: https://lore.kernel.org/r/20210522012626.2811297-1-ndesaulniers@google.com
Signed-off-by: Will Deacon <will@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 Makefile                      | 2 +-
 scripts/tools-support-relr.sh | 3 ++-
 2 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/Makefile b/Makefile
index 0565caea0362..88888fff4c62 100644
--- a/Makefile
+++ b/Makefile
@@ -1039,7 +1039,7 @@ LDFLAGS_vmlinux	+= $(call ld-option, -X,)
 endif
 
 ifeq ($(CONFIG_RELR),y)
-LDFLAGS_vmlinux	+= --pack-dyn-relocs=relr
+LDFLAGS_vmlinux	+= --pack-dyn-relocs=relr --use-android-relr-tags
 endif
 
 # We never want expected sections to be placed heuristically by the
diff --git a/scripts/tools-support-relr.sh b/scripts/tools-support-relr.sh
index 45e8aa360b45..cb55878bd5b8 100755
--- a/scripts/tools-support-relr.sh
+++ b/scripts/tools-support-relr.sh
@@ -7,7 +7,8 @@ trap "rm -f $tmp_file.o $tmp_file $tmp_file.bin" EXIT
 cat << "END" | $CC -c -x c - -o $tmp_file.o >/dev/null 2>&1
 void *p = &p;
 END
-$LD $tmp_file.o -shared -Bsymbolic --pack-dyn-relocs=relr -o $tmp_file
+$LD $tmp_file.o -shared -Bsymbolic --pack-dyn-relocs=relr \
+  --use-android-relr-tags -o $tmp_file
 
 # Despite printing an error message, GNU nm still exits with exit code 0 if it
 # sees a relr section. So we need to check that nothing is printed to stderr.
-- 
2.30.2


  parent reply	other threads:[~2021-07-04 23:06 UTC|newest]

Thread overview: 89+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-07-04 23:02 [PATCH AUTOSEL 5.13 01/85] spi: Make of_register_spi_device also set the fwnode Sasha Levin
2021-07-04 23:02 ` [PATCH AUTOSEL 5.13 02/85] Add a reference to ucounts for each cred Sasha Levin
2021-07-04 23:02 ` [PATCH AUTOSEL 5.13 03/85] staging: media: rkvdec: fix pm_runtime_get_sync() usage count Sasha Levin
2021-07-04 23:02 ` [PATCH AUTOSEL 5.13 04/85] media: i2c: imx334: fix the pm runtime get logic Sasha Levin
2021-07-04 23:03 ` [PATCH AUTOSEL 5.13 05/85] media: marvel-ccic: fix some issues when getting pm_runtime Sasha Levin
2021-07-04 23:03 ` [PATCH AUTOSEL 5.13 06/85] media: mdk-mdp: fix pm_runtime_get_sync() usage count Sasha Levin
2021-07-04 23:03 ` [PATCH AUTOSEL 5.13 07/85] media: s5p: " Sasha Levin
2021-07-04 23:03 ` [PATCH AUTOSEL 5.13 08/85] media: am437x: " Sasha Levin
2021-07-04 23:03 ` [PATCH AUTOSEL 5.13 09/85] media: sh_vou: " Sasha Levin
2021-07-04 23:03 ` [PATCH AUTOSEL 5.13 10/85] media: mtk-vcodec: fix PM runtime get logic Sasha Levin
2021-07-04 23:03 ` [PATCH AUTOSEL 5.13 11/85] media: s5p-jpeg: fix pm_runtime_get_sync() usage count Sasha Levin
2021-07-04 23:03 ` [PATCH AUTOSEL 5.13 12/85] media: sunxi: " Sasha Levin
2021-07-04 23:03 ` [PATCH AUTOSEL 5.13 13/85] media: sti/bdisp: " Sasha Levin
2021-07-04 23:03 ` [PATCH AUTOSEL 5.13 14/85] media: exynos4-is: " Sasha Levin
2021-07-04 23:03 ` [PATCH AUTOSEL 5.13 15/85] media: exynos-gsc: " Sasha Levin
2021-07-04 23:03 ` [PATCH AUTOSEL 5.13 16/85] spi: spi-loopback-test: Fix 'tx_buf' might be 'rx_buf' Sasha Levin
2021-07-04 23:03 ` [PATCH AUTOSEL 5.13 17/85] spi: spi-topcliff-pch: Fix potential double free in pch_spi_process_messages() Sasha Levin
2021-07-04 23:03 ` [PATCH AUTOSEL 5.13 18/85] spi: omap-100k: Fix the length judgment problem Sasha Levin
2021-07-04 23:03 ` [PATCH AUTOSEL 5.13 19/85] regulator: uniphier: Add missing MODULE_DEVICE_TABLE Sasha Levin
2021-07-04 23:03 ` [PATCH AUTOSEL 5.13 20/85] sched/core: Initialize the idle task with preemption disabled Sasha Levin
2021-07-04 23:03 ` [PATCH AUTOSEL 5.13 21/85] hwrng: exynos - Fix runtime PM imbalance on error Sasha Levin
2021-07-04 23:03 ` [PATCH AUTOSEL 5.13 22/85] crypto: nx - add missing MODULE_DEVICE_TABLE Sasha Levin
2021-07-04 23:03 ` [PATCH AUTOSEL 5.13 23/85] regmap-i2c: Set regmap max raw r/w from quirks Sasha Levin
2021-07-05 12:09   ` Mark Brown
2021-07-09 14:02     ` Sasha Levin
2021-07-04 23:03 ` [PATCH AUTOSEL 5.13 24/85] media: sti: fix obj-$(config) targets Sasha Levin
2021-07-04 23:03 ` [PATCH AUTOSEL 5.13 25/85] sched: Make the idle task quack like a per-CPU kthread Sasha Levin
2021-07-04 23:03 ` [PATCH AUTOSEL 5.13 26/85] media: cpia2: fix memory leak in cpia2_usb_probe Sasha Levin
2021-07-04 23:03 ` [PATCH AUTOSEL 5.13 27/85] media: cobalt: fix race condition in setting HPD Sasha Levin
2021-07-04 23:03 ` [PATCH AUTOSEL 5.13 28/85] media: hevc: Fix dependent slice segment flags Sasha Levin
2021-07-04 23:03 ` [PATCH AUTOSEL 5.13 29/85] media: pvrusb2: fix warning in pvr2_i2c_core_done Sasha Levin
2021-07-04 23:03 ` [PATCH AUTOSEL 5.13 30/85] media: imx: imx7_mipi_csis: Fix logging of only error event counters Sasha Levin
2021-07-04 23:03 ` [PATCH AUTOSEL 5.13 31/85] crypto: qat - check return code of qat_hal_rd_rel_reg() Sasha Levin
2021-07-04 23:03 ` [PATCH AUTOSEL 5.13 32/85] crypto: qat - remove unused macro in FW loader Sasha Levin
2021-07-04 23:03 ` [PATCH AUTOSEL 5.13 33/85] crypto: qce: skcipher: Fix incorrect sg count for dma transfers Sasha Levin
2021-07-04 23:03 ` [PATCH AUTOSEL 5.13 34/85] crypto: ecdh - fix ecdh-nist-p192's entry in testmgr Sasha Levin
2021-07-04 23:03 ` [PATCH AUTOSEL 5.13 35/85] crypto: ecdh - fix 'ecdh_init' Sasha Levin
2021-07-04 23:03 ` [PATCH AUTOSEL 5.13 36/85] arm64: perf: Convert snprintf to sysfs_emit Sasha Levin
2021-07-04 23:03 ` [PATCH AUTOSEL 5.13 37/85] sched/fair: Fix ascii art by relpacing tabs Sasha Levin
2021-07-04 23:03 ` [PATCH AUTOSEL 5.13 38/85] ima: Don't remove security.ima if file must not be appraised Sasha Levin
2021-07-04 23:03 ` [PATCH AUTOSEL 5.13 39/85] media: i2c: ov2659: Use clk_{prepare_enable,disable_unprepare}() to set xvclk on/off Sasha Levin
2021-07-04 23:03 ` [PATCH AUTOSEL 5.13 40/85] media: bt878: do not schedule tasklet when it is not setup Sasha Levin
2021-07-04 23:03 ` [PATCH AUTOSEL 5.13 41/85] media: em28xx: Fix possible memory leak of em28xx struct Sasha Levin
2021-07-04 23:03 ` [PATCH AUTOSEL 5.13 42/85] media: hantro: Fix .buf_prepare Sasha Levin
2021-07-04 23:03 ` [PATCH AUTOSEL 5.13 43/85] media: cedrus: " Sasha Levin
2021-07-04 23:03 ` [PATCH AUTOSEL 5.13 44/85] media: v4l2-core: Avoid the dangling pointer in v4l2_fh_release Sasha Levin
2021-07-04 23:03 ` [PATCH AUTOSEL 5.13 45/85] media: bt8xx: Fix a missing check bug in bt878_probe Sasha Levin
2021-07-04 23:03 ` [PATCH AUTOSEL 5.13 46/85] media: st-hva: Fix potential NULL pointer dereferences Sasha Levin
2021-07-04 23:03 ` [PATCH AUTOSEL 5.13 47/85] crypto: hisilicon/sec - fixup 3des minimum key size declaration Sasha Levin
2021-07-04 23:03 ` [PATCH AUTOSEL 5.13 48/85] arm64: entry: don't instrument entry code with KCOV Sasha Levin
2021-07-04 23:03 ` Sasha Levin [this message]
2021-07-04 23:03 ` [PATCH AUTOSEL 5.13 50/85] media: dvd_usb: memory leak in cinergyt2_fe_attach Sasha Levin
2021-07-04 23:03 ` [PATCH AUTOSEL 5.13 51/85] memstick: rtsx_usb_ms: fix UAF Sasha Levin
2021-07-04 23:03 ` [PATCH AUTOSEL 5.13 52/85] mmc: sdhci-sprd: use sdhci_sprd_writew Sasha Levin
2021-07-04 23:03 ` [PATCH AUTOSEL 5.13 53/85] mmc: via-sdmmc: add a check against NULL pointer dereference Sasha Levin
2021-07-04 23:03 ` [PATCH AUTOSEL 5.13 54/85] mmc: sdhci-of-aspeed: Turn down a phase correction warning Sasha Levin
2021-07-04 23:03 ` [PATCH AUTOSEL 5.13 55/85] spi: meson-spicc: fix a wrong goto jump for avoiding memory leak Sasha Levin
2021-07-04 23:03 ` [PATCH AUTOSEL 5.13 56/85] spi: meson-spicc: fix memory leak in meson_spicc_probe Sasha Levin
2021-07-04 23:03 ` [PATCH AUTOSEL 5.13 57/85] regulator: mt6315: Fix checking return value of devm_regmap_init_spmi_ext Sasha Levin
2021-07-04 23:03 ` [PATCH AUTOSEL 5.13 58/85] crypto: shash - avoid comparing pointers to exported functions under CFI Sasha Levin
2021-07-04 23:03 ` [PATCH AUTOSEL 5.13 59/85] media: dvb_net: avoid speculation from net slot Sasha Levin
2021-07-04 23:03 ` [PATCH AUTOSEL 5.13 60/85] media: dvbdev: fix error logic at dvb_register_device() Sasha Levin
2021-07-04 23:03 ` [PATCH AUTOSEL 5.13 61/85] media: siano: fix device register error path Sasha Levin
2021-07-04 23:03 ` [PATCH AUTOSEL 5.13 62/85] media: imx-csi: Skip first few frames from a BT.656 source Sasha Levin
2021-07-04 23:03 ` [PATCH AUTOSEL 5.13 63/85] hwmon: (max31790) Report correct current pwm duty cycles Sasha Levin
2021-07-04 23:03 ` [PATCH AUTOSEL 5.13 64/85] hwmon: (max31790) Fix pwmX_enable attributes Sasha Levin
2021-07-04 23:04 ` [PATCH AUTOSEL 5.13 65/85] sched/fair: Take thermal pressure into account while estimating energy Sasha Levin
2021-07-04 23:04 ` [PATCH AUTOSEL 5.13 66/85] perf/x86: Reset the dirty counter to prevent the leak for an RDPMC task Sasha Levin
2021-07-04 23:04 ` [PATCH AUTOSEL 5.13 67/85] drivers/perf: fix the missed ida_simple_remove() in ddr_perf_probe() Sasha Levin
2021-07-04 23:04 ` [PATCH AUTOSEL 5.13 68/85] KVM: arm64: Restore PMU configuration on first run Sasha Levin
2021-07-04 23:04 ` [PATCH AUTOSEL 5.13 69/85] KVM: PPC: Book3S HV: Fix TLB management on SMT8 POWER9 and POWER10 processors Sasha Levin
2021-07-04 23:04 ` [PATCH AUTOSEL 5.13 70/85] btrfs: fix error handling in __btrfs_update_delayed_inode Sasha Levin
2021-07-04 23:04 ` [PATCH AUTOSEL 5.13 71/85] btrfs: abort transaction if we fail to update the delayed inode Sasha Levin
2021-07-04 23:04 ` [PATCH AUTOSEL 5.13 72/85] btrfs: always abort the transaction if we abort a trans handle Sasha Levin
2021-07-04 23:04 ` [PATCH AUTOSEL 5.13 73/85] btrfs: sysfs: fix format string for some discard stats Sasha Levin
2021-07-04 23:04 ` [PATCH AUTOSEL 5.13 74/85] btrfs: scrub: fix subpage repair error caused by hard coded PAGE_SIZE Sasha Levin
2021-07-04 23:04 ` [PATCH AUTOSEL 5.13 75/85] btrfs: make Private2 lifespan more consistent Sasha Levin
2021-07-07 11:10   ` David Sterba
2021-07-08 11:09     ` Sasha Levin
2021-07-04 23:04 ` [PATCH AUTOSEL 5.13 76/85] btrfs: fix the filemap_range_has_page() call in btrfs_punch_hole_lock_range() Sasha Levin
2021-07-04 23:04 ` [PATCH AUTOSEL 5.13 77/85] btrfs: don't clear page extent mapped if we're not invalidating the full page Sasha Levin
2021-07-04 23:04 ` [PATCH AUTOSEL 5.13 78/85] btrfs: disable build on platforms having page size 256K Sasha Levin
2021-07-04 23:04 ` [PATCH AUTOSEL 5.13 79/85] locking/lockdep: Fix the dep path printing for backwards BFS Sasha Levin
2021-07-04 23:04 ` [PATCH AUTOSEL 5.13 80/85] lockding/lockdep: Avoid to find wrong lock dep path in check_irq_usage() Sasha Levin
2021-07-04 23:04 ` [PATCH AUTOSEL 5.13 81/85] KVM: s390: get rid of register asm usage Sasha Levin
2021-07-04 23:04 ` [PATCH AUTOSEL 5.13 82/85] regulator: mt6358: Fix vdram2 .vsel_mask Sasha Levin
2021-07-04 23:04 ` [PATCH AUTOSEL 5.13 83/85] regulator: da9052: Ensure enough delay time for .set_voltage_time_sel Sasha Levin
2021-07-04 23:04 ` [PATCH AUTOSEL 5.13 84/85] media: Fix Media Controller API config checks Sasha Levin
2021-07-04 23:04 ` [PATCH AUTOSEL 5.13 85/85] seccomp: Support atomic "addfd + send reply" Sasha Levin

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