From: Sasha Levin <sashal@kernel.org>
To: linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc: Josh Poimboeuf <jpoimboe@kernel.org>,
Ingo Molnar <mingo@kernel.org>, Sasha Levin <sashal@kernel.org>,
peterz@infradead.org, nathan@kernel.org, ndesaulniers@google.com,
llvm@lists.linux.dev
Subject: [PATCH AUTOSEL 6.5 34/41] objtool: Fix _THIS_IP_ detection for cold functions
Date: Sun, 24 Sep 2023 09:15:22 -0400 [thread overview]
Message-ID: <20230924131529.1275335-34-sashal@kernel.org> (raw)
In-Reply-To: <20230924131529.1275335-1-sashal@kernel.org>
From: Josh Poimboeuf <jpoimboe@kernel.org>
[ Upstream commit 72178d5d1a38dd185d1db15f177f2d122ef10d9b ]
Cold functions and their non-cold counterparts can use _THIS_IP_ to
reference each other. Don't warn about !ENDBR in that case.
Note that for GCC this is currently irrelevant in light of the following
commit
c27cd083cfb9 ("Compiler attributes: GCC cold function alignment workarounds")
which disabled cold functions in the kernel. However this may still be
possible with Clang.
Fixes several warnings like the following:
drivers/scsi/bnx2i/bnx2i.prelink.o: warning: objtool: bnx2i_hw_ep_disconnect+0x19d: relocation to !ENDBR: bnx2i_hw_ep_disconnect.cold+0x0
drivers/net/ipvlan/ipvlan.prelink.o: warning: objtool: ipvlan_addr4_event.cold+0x28: relocation to !ENDBR: ipvlan_addr4_event+0xda
drivers/net/ipvlan/ipvlan.prelink.o: warning: objtool: ipvlan_addr6_event.cold+0x26: relocation to !ENDBR: ipvlan_addr6_event+0xb7
drivers/net/ethernet/broadcom/tg3.prelink.o: warning: objtool: tg3_set_ringparam.cold+0x17: relocation to !ENDBR: tg3_set_ringparam+0x115
drivers/net/ethernet/broadcom/tg3.prelink.o: warning: objtool: tg3_self_test.cold+0x17: relocation to !ENDBR: tg3_self_test+0x2e1
drivers/target/iscsi/cxgbit/cxgbit.prelink.o: warning: objtool: __cxgbit_free_conn.cold+0x24: relocation to !ENDBR: __cxgbit_free_conn+0xfb
net/can/can.prelink.o: warning: objtool: can_rx_unregister.cold+0x2c: relocation to !ENDBR: can_rx_unregister+0x11b
drivers/net/ethernet/qlogic/qed/qed.prelink.o: warning: objtool: qed_spq_post+0xc0: relocation to !ENDBR: qed_spq_post.cold+0x9a
drivers/net/ethernet/qlogic/qed/qed.prelink.o: warning: objtool: qed_iwarp_ll2_comp_syn_pkt.cold+0x12f: relocation to !ENDBR: qed_iwarp_ll2_comp_syn_pkt+0x34b
net/tipc/tipc.prelink.o: warning: objtool: tipc_nametbl_publish.cold+0x21: relocation to !ENDBR: tipc_nametbl_publish+0xa6
Signed-off-by: Josh Poimboeuf <jpoimboe@kernel.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Link: https://lore.kernel.org/r/d8f1ab6a23a6105bc023c132b105f245c7976be6.1694476559.git.jpoimboe@kernel.org
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
tools/objtool/check.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/tools/objtool/check.c b/tools/objtool/check.c
index 1384090530dbe..e308d1ba664ef 100644
--- a/tools/objtool/check.c
+++ b/tools/objtool/check.c
@@ -4333,7 +4333,8 @@ static int validate_ibt_insn(struct objtool_file *file, struct instruction *insn
continue;
}
- if (insn_func(dest) && insn_func(dest) == insn_func(insn)) {
+ if (insn_func(dest) && insn_func(insn) &&
+ insn_func(dest)->pfunc == insn_func(insn)->pfunc) {
/*
* Anything from->to self is either _THIS_IP_ or
* IRET-to-self.
--
2.40.1
next prev parent reply other threads:[~2023-09-24 13:19 UTC|newest]
Thread overview: 43+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-09-24 13:14 [PATCH AUTOSEL 6.5 01/41] nvme-fc: Prevent null pointer dereference in nvme_fc_io_getuuid() Sasha Levin
2023-09-24 13:14 ` [PATCH AUTOSEL 6.5 02/41] parisc: sba: Fix compile warning wrt list of SBA devices Sasha Levin
2023-09-24 13:14 ` [PATCH AUTOSEL 6.5 03/41] parisc: sba-iommu: Fix sparse warnigs Sasha Levin
2023-09-24 13:14 ` [PATCH AUTOSEL 6.5 04/41] parisc: ccio-dma: Fix sparse warnings Sasha Levin
2023-09-24 13:14 ` [PATCH AUTOSEL 6.5 05/41] parisc: iosapic.c: " Sasha Levin
2023-09-24 13:14 ` [PATCH AUTOSEL 6.5 06/41] parisc: drivers: Fix sparse warning Sasha Levin
2023-09-24 13:14 ` [PATCH AUTOSEL 6.5 07/41] parisc: irq: Make irq_stack_union static to avoid " Sasha Levin
2023-09-24 13:14 ` [PATCH AUTOSEL 6.5 08/41] scsi: qedf: Add synchronization between I/O completions and abort Sasha Levin
2023-09-24 13:14 ` [PATCH AUTOSEL 6.5 09/41] scsi: ufs: core: Move __ufshcd_send_uic_cmd() outside host_lock Sasha Levin
2023-09-24 13:14 ` [PATCH AUTOSEL 6.5 10/41] scsi: ufs: core: Poll HCS.UCRDY before issuing a UIC command Sasha Levin
2023-09-24 13:14 ` [PATCH AUTOSEL 6.5 11/41] selftests/ftrace: Correctly enable event in instance-event.tc Sasha Levin
2023-09-24 13:15 ` [PATCH AUTOSEL 6.5 12/41] ring-buffer: Avoid softlockup in ring_buffer_resize() Sasha Levin
2023-09-24 13:15 ` [PATCH AUTOSEL 6.5 13/41] btrfs: do not block starts waiting on previous transaction commit Sasha Levin
2023-09-25 13:01 ` David Sterba
2023-09-25 17:47 ` Sasha Levin
2023-09-24 13:15 ` [PATCH AUTOSEL 6.5 14/41] btrfs: improve error message after failure to add delayed dir index item Sasha Levin
2023-09-24 13:15 ` [PATCH AUTOSEL 6.5 15/41] btrfs: assert delayed node locked when removing delayed item Sasha Levin
2023-09-24 13:15 ` [PATCH AUTOSEL 6.5 16/41] selftests: fix dependency checker script Sasha Levin
2023-09-24 13:15 ` [PATCH AUTOSEL 6.5 17/41] ring-buffer: Do not attempt to read past "commit" Sasha Levin
2023-09-24 13:15 ` [PATCH AUTOSEL 6.5 18/41] net/smc: bugfix for smcr v2 server connect success statistic Sasha Levin
2023-09-24 13:15 ` [PATCH AUTOSEL 6.5 19/41] ata: sata_mv: Fix incorrect string length computation in mv_dump_mem() Sasha Levin
2023-09-24 13:15 ` [PATCH AUTOSEL 6.5 20/41] efi/x86: Ensure that EFI_RUNTIME_MAP is enabled for kexec Sasha Levin
2023-09-24 13:15 ` [PATCH AUTOSEL 6.5 21/41] platform/mellanox: mlxbf-bootctl: add NET dependency into Kconfig Sasha Levin
2023-09-24 13:15 ` [PATCH AUTOSEL 6.5 22/41] platform/x86: asus-wmi: Support 2023 ROG X16 tablet mode Sasha Levin
2023-09-24 13:15 ` [PATCH AUTOSEL 6.5 23/41] thermal/of: add missing of_node_put() Sasha Levin
2023-09-24 13:15 ` [PATCH AUTOSEL 6.5 24/41] drm/amdgpu: Store CU info from all XCCs for GFX v9.4.3 Sasha Levin
2023-09-24 13:15 ` [PATCH AUTOSEL 6.5 25/41] drm/amdkfd: Update cache info reporting " Sasha Levin
2023-09-24 13:15 ` [PATCH AUTOSEL 6.5 26/41] drm/amdkfd: Update CU masking for GFX 9.4.3 Sasha Levin
2023-09-24 13:15 ` [PATCH AUTOSEL 6.5 27/41] drm/amd/display: Add dirty rect support for Replay Sasha Levin
2023-09-24 13:15 ` [PATCH AUTOSEL 6.5 28/41] drm/amd/display: Don't check registers, if using AUX BL control Sasha Levin
2023-09-24 13:15 ` [PATCH AUTOSEL 6.5 29/41] drm/amdgpu/soc21: don't remap HDP registers for SR-IOV Sasha Levin
2023-09-24 13:15 ` [PATCH AUTOSEL 6.5 30/41] drm/amdgpu/nbio4.3: set proper rmmio_remap.reg_offset " Sasha Levin
2023-09-24 13:15 ` [PATCH AUTOSEL 6.5 31/41] drm/amdgpu: fallback to old RAS error message for aqua_vanjaram Sasha Levin
2023-09-24 13:15 ` [PATCH AUTOSEL 6.5 32/41] drm/amdkfd: Checkpoint and restore queues on GFX11 Sasha Levin
2023-09-24 13:15 ` [PATCH AUTOSEL 6.5 33/41] drm/amdgpu: Handle null atom context in VBIOS info ioctl Sasha Levin
2023-09-24 13:15 ` Sasha Levin [this message]
2023-09-24 13:15 ` [PATCH AUTOSEL 6.5 35/41] nvme-pci: do not set the NUMA node of device if it has none Sasha Levin
2023-09-24 13:15 ` [PATCH AUTOSEL 6.5 36/41] riscv: errata: fix T-Head dcache.cva encoding Sasha Levin
2023-09-24 13:15 ` [PATCH AUTOSEL 6.5 37/41] scsi: pm80xx: Use phy-specific SAS address when sending PHY_START command Sasha Levin
2023-09-24 13:15 ` [PATCH AUTOSEL 6.5 38/41] scsi: pm80xx: Avoid leaking tags when processing OPC_INB_SET_CONTROLLER_CONFIG command Sasha Levin
2023-09-24 13:15 ` [PATCH AUTOSEL 6.5 39/41] smb3: correct places where ENOTSUPP is used instead of preferred EOPNOTSUPP Sasha Levin
2023-09-24 13:15 ` [PATCH AUTOSEL 6.5 40/41] ata: libata-eh: do not clear ATA_PFLAG_EH_PENDING in ata_eh_reset() Sasha Levin
2023-09-24 13:15 ` [PATCH AUTOSEL 6.5 41/41] ata: libata-eh: do not thaw the port twice " Sasha Levin
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