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- From ed9b2e40ebffec835d63473367da8dd8f80d7d5b Mon Sep 17 00:00:00 2001
- From: Alan Modra <amodra@gmail.com>
- Date: Mon, 21 Feb 2022 10:58:57 +1030
- Subject: [PATCH] binutils 2.38 vs. ppc32 linux kernel
- Commit b25f942e18d6 made .machine more strict. Weaken it again.
- * config/tc-ppc.c (ppc_machine): Treat an early .machine specially,
- keeping sticky options to work around gcc bugs.
- (cherry picked from commit cebc89b9328eab994f6b0314c263f94e7949a553)
- Signed-off-by: Waldemar Brodkorb <wbx@openadk.org>
- ---
- gas/config/tc-ppc.c | 25 ++++++++++++++++++++++++-
- 1 file changed, 24 insertions(+), 1 deletion(-)
- diff --git a/gas/config/tc-ppc.c b/gas/config/tc-ppc.c
- index 054f9c72161..89bc7d3f9b9 100644
- --- a/gas/config/tc-ppc.c
- +++ b/gas/config/tc-ppc.c
- @@ -5965,7 +5965,30 @@ ppc_machine (int ignore ATTRIBUTE_UNUSED)
- options do not count as a new machine, instead they add
- to currently selected opcodes. */
- ppc_cpu_t machine_sticky = 0;
- - new_cpu = ppc_parse_cpu (ppc_cpu, &machine_sticky, cpu_string);
- + /* Unfortunately, some versions of gcc emit a .machine
- + directive very near the start of the compiler's assembly
- + output file. This is bad because it overrides user -Wa
- + cpu selection. Worse, there are versions of gcc that
- + emit the *wrong* cpu, not even respecting the -mcpu given
- + to gcc. See gcc pr101393. And to compound the problem,
- + as of 20220222 gcc doesn't pass the correct cpu option to
- + gas on the command line. See gcc pr59828. Hack around
- + this by keeping sticky options for an early .machine. */
- + asection *sec;
- + for (sec = stdoutput->sections; sec != NULL; sec = sec->next)
- + {
- + segment_info_type *info = seg_info (sec);
- + /* Are the frags for this section perturbed from their
- + initial state? Even .align will count here. */
- + if (info != NULL
- + && (info->frchainP->frch_root != info->frchainP->frch_last
- + || info->frchainP->frch_root->fr_type != rs_fill
- + || info->frchainP->frch_root->fr_fix != 0))
- + break;
- + }
- + new_cpu = ppc_parse_cpu (ppc_cpu,
- + sec == NULL ? &sticky : &machine_sticky,
- + cpu_string);
- if (new_cpu != 0)
- ppc_cpu = new_cpu;
- else
- --
- 2.30.2
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