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objtool: Handle __sanitize_cov*() tail calls

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Turns out the compilers also generate tail calls to __sanitize_cov*(),
make sure to also patch those out in noinstr code.

Fixes: 0f1441b44e ("objtool: Fix noinstr vs KCOV")
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: Marco Elver <elver@google.com>
Link: https://lore.kernel.org/r/20210624095147.818783799@infradead.org
This commit is contained in:
Peter Zijlstra
2021-06-24 11:41:02 +02:00
parent 8b946cc38e
commit f56dae88a8
3 changed files with 105 additions and 74 deletions
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1
tools/objtool/include/objtool/arch.h
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@@ -82,6 +82,7 @@ unsigned long arch_jump_destination(struct instruction *insn);
unsigned long arch_dest_reloc_offset(int addend);
const char *arch_nop_insn(int len);
const char *arch_ret_insn(int len);
int arch_decode_hint_reg(u8 sp_reg, int *base);