Josh Poimboeuf b735bd3e68 objtool: Combine UNWIND_HINT_RET_OFFSET and UNWIND_HINT_FUNC ...

The ORC metadata generated for UNWIND_HINT_FUNC isn't actually very
func-like.  With certain usages it can cause stack state mismatches
because it doesn't set the return address (CFI_RA).

Also, users of UNWIND_HINT_RET_OFFSET no longer need to set a custom
return stack offset.  Instead they just need to specify a func-like
situation, so the current ret_offset code is hacky for no good reason.

Solve both problems by simplifying the RET_OFFSET handling and
converting it into a more useful UNWIND_HINT_FUNC.

If we end up needing the old 'ret_offset' functionality again in the
future, we should be able to support it pretty easily with the addition
of a custom 'sp_offset' in UNWIND_HINT_FUNC.

Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com>
Link: https://lore.kernel.org/r/db9d1f5d79dddfbb3725ef6d8ec3477ad199948d.1611263462.git.jpoimboe@redhat.com

2021-01-26 11:12:00 -06:00

..

sched

tools/lib/lockdep: Remove private kernel headers

2017-06-05 09:28:14 +02:00

unaligned

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

atomic.h

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

bitmap.h

tools bitmap: Implement bitmap_equal() operation at bitmap API

2020-01-06 11:46:04 -03:00

bitops.h

bitops: more BITS_TO_* macros

2020-02-04 03:05:26 +00:00

bits.h

Raise gcc version requirement to 4.9

2020-07-08 10:48:35 -07:00

btf_ids.h

btf: Add BTF_ID_LIST_SINGLE macro

2020-09-21 15:00:40 -07:00

bug.h

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

build_bug.h

tools headers: Syncronize linux/build_bug.h with the kernel sources

2020-12-17 14:38:23 -03:00

compiler_types.h

tools headers: Add conditional __has_builtin()

2020-12-18 17:32:28 -03:00

compiler-gcc.h

perf tools: Remove broken __no_tail_call attribute

2020-11-03 08:32:15 -03:00

compiler.h

tools headers: Get tools's linux/compiler.h closer to the kernel's

2020-12-18 17:32:26 -03:00

const.h

tools headers: Update linux/vdso.h and grab a copy of vdso/const.h

2020-04-14 08:55:03 -03:00

coresight-pmu.h

coresight: etm4x: Add kernel configuration for CONTEXTID

2019-04-25 22:00:16 +02:00

ctype.h

tools headers: Update linux/ctype.h with the kernel sources

2020-12-18 17:32:28 -03:00

debug_locks.h

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

delay.h

tools/lib/lockdep: Remove private kernel headers

2017-06-05 09:28:14 +02:00

err.h

docs: fix broken documentation links

2019-06-08 13:42:13 -06:00

export.h

tools: Restore export.h

2015-08-25 09:44:22 +02:00

filter.h

bpf, selftest: test {rd, wr}only flags and direct value access

2019-04-09 17:05:47 -07:00

ftrace.h

tools/lib/lockdep: Remove private kernel headers

2017-06-05 09:28:14 +02:00

gfp.h

tools/lib/lockdep: Remove private kernel headers

2017-06-05 09:28:14 +02:00

hardirq.h

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

hash.h

tools/headers: Synchronize kernel ABI headers

2017-11-04 09:27:46 +01:00

hashtable.h

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

interrupt.h

tools/lib/lockdep: Remove private kernel headers

2017-06-05 09:28:14 +02:00

irqflags.h

lockdep: Remove lockdep_hardirq{s_enabled,_context}() argument

2020-07-10 12:00:02 +02:00

jhash.h

tools/: replace HTTP links with HTTPS ones

2020-08-07 11:33:21 -07:00

kallsyms.h

kallsyms/printk: add loglvl to print_ip_sym()

2020-06-09 09:39:10 -07:00

kern_levels.h

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

kernel.h

tools headers: Synchronize linux/bits.h with the kernel sources

2020-04-14 11:40:05 -03:00

linkage.h

tools/lib/lockdep: Remove private kernel headers

2017-06-05 09:28:14 +02:00

list.h

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

lockdep.h

tools/lib/lockdep: Add dummy task_struct state member

2018-09-10 13:48:24 +02:00

log2.h

treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152

2019-05-30 11:26:32 -07:00

module.h

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

mutex.h

tools/lib/lockdep: Remove private kernel headers

2017-06-05 09:28:14 +02:00

nmi.h

tools/lib/lockdep: Add empty nmi.h

2018-09-10 13:48:23 +02:00

numa.h

tools/: replace open encodings for NUMA_NO_NODE

2019-03-05 21:07:14 -08:00

objtool.h

objtool: Combine UNWIND_HINT_RET_OFFSET and UNWIND_HINT_FUNC

2021-01-26 11:12:00 -06:00

overflow.h

tools: bpf: make use of reallocarray

2018-07-11 22:13:34 +02:00

poison.h

mm, page_poison: remove CONFIG_PAGE_POISONING_ZERO

2020-12-15 12:13:46 -08:00

proc_fs.h

tools/lib/lockdep: Remove private kernel headers

2017-06-05 09:28:14 +02:00

rbtree_augmented.h

docs: Add rbtree documentation to the core-api

2020-04-21 10:29:19 -06:00

rbtree.h

docs: Add rbtree documentation to the core-api

2020-04-21 10:29:19 -06:00

rcu.h

rcu: Don't return a value from rcu_assign_pointer()

2019-06-13 15:38:34 -07:00

refcount.h

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

ring_buffer.h

tools headers: Add missing perf_event.h include

2019-08-22 11:12:36 -03:00

seq_file.h

tools/lib/lockdep: Remove private kernel headers

2017-06-05 09:28:14 +02:00

sizes.h

tools: bpftool: add "prog run" subcommand to test-run programs

2019-07-05 23:48:07 +02:00

spinlock.h

xarray: Add XArray unconditional store operations

2018-10-21 10:45:57 -04:00

stacktrace.h

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

static_call_types.h

static_call: Handle tail-calls

2020-09-01 09:58:06 +02:00

string.h

tools lib: Adopt memchr_inv() from kernel

2020-11-27 08:34:52 -03:00

stringify.h

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

time64.h

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

types.h

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

zalloc.h

tools lib: Adopt zalloc()/zfree() from tools/perf

2019-07-09 10:13:26 -03:00