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objtool: Fix static_call list generation

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[ Upstream commit a958c4fea7 ]

Currently, objtool generates tail call entries in add_jump_destination()
but waits until validate_branch() to generate the regular call entries.
Move these to add_call_destination() for consistency.

Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Borislav Petkov <bp@suse.de>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Reviewed-by: Miroslav Benes <mbenes@suse.cz>
Link: https://lkml.kernel.org/r/20210326151259.691529901@infradead.org
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Peter Zijlstra 2021-03-26 16:12:05 +01:00 committed by Greg Kroah-Hartman
parent b36ab509e1
commit f0bc12b848
1 changed files with 12 additions and 5 deletions
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17
tools/objtool/check.c
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@ -954,6 +954,11 @@ static int add_call_destinations(struct objtool_file *file)
} else
insn->call_dest = reloc->sym;
if (insn->call_dest && insn->call_dest->static_call_tramp) {
list_add_tail(&insn->static_call_node,
&file->static_call_list);
}
/*
* Many compilers cannot disable KCOV with a function attribute
* so they need a little help, NOP out any KCOV calls from noinstr
@ -1668,6 +1673,9 @@ static int decode_sections(struct objtool_file *file)
if (ret)
return ret;
/*
* Must be before add_{jump_call}_destination.
*/
ret = read_static_call_tramps(file);
if (ret)
return ret;
@ -1680,6 +1688,10 @@ static int decode_sections(struct objtool_file *file)
if (ret)
return ret;
/*
* Must be before add_call_destination(); it changes INSN_CALL to
* INSN_JUMP.
*/
ret = read_intra_function_calls(file);
if (ret)
return ret;
@ -2534,11 +2546,6 @@ static int validate_branch(struct objtool_file *file, struct symbol *func,
if (dead_end_function(file, insn->call_dest))
return 0;
if (insn->type == INSN_CALL && insn->call_dest->static_call_tramp) {
list_add_tail(&insn->static_call_node,
&file->static_call_list);
}
break;
case INSN_JUMP_CONDITIONAL: