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64 lines
2.6 KiB
64 lines
2.6 KiB
commit 82b1acd9de9796298a230d7484f26fe9a7756d18 |
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Author: Paul A. Clarke <pc@us.ibm.com> |
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Date: Sat Sep 25 09:57:15 2021 -0500 |
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powerpc: Fix unrecognized instruction errors with recent binutils |
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Recent versions of binutils (with commit |
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b25f942e18d6ecd7ec3e2d2e9930eb4f996c258a) stopped preserving "sticky" |
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options across a base `.machine` directive, nullifying the use of |
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passing "-many" through GCC to the assembler. As a result, some |
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instructions which were recognized even under older, more stringent |
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`.machine` directives become unrecognized instructions in that |
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context. |
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In `sysdeps/powerpc/tst-set_ppr.c`, the use of the `mfppr32` extended |
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mnemonic became unrecognized, as the default compilation with GCC for |
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32bit powerpc adds a `.machine ppc` in the resulting assembly, so the |
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command line option `-Wa,-many` is essentially ignored, and the ISA 2.06 |
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instructions and mnemonics, like `mfppr32`, are unrecognized. |
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The compilation of `sysdeps/powerpc/tst-set_ppr.c` fails with: |
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Error: unrecognized opcode: `mfppr32' |
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Add appropriate `.machine` directives in the assembly to bracket the |
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`mfppr32` instruction. |
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Part of a 2019 fix (commit 9250e6610fdb0f3a6f238d2813e319a41fb7a810) to |
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the above test's Makefile to add `-many` to the compilation when GCC |
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itself stopped passing `-many` to the assember no longer has any effect, |
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so remove that. |
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Reported-by: Joseph Myers <joseph@codesourcery.com> |
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(cherry picked from commit ee874f44fd55988808a4a162ef21bfa2cc8dc6f7) |
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diff --git a/sysdeps/powerpc/Makefile b/sysdeps/powerpc/Makefile |
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index 09860ffc0155d765..5e6cb07ce66decfa 100644 |
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--- a/sysdeps/powerpc/Makefile |
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+++ b/sysdeps/powerpc/Makefile |
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@@ -61,11 +61,6 @@ ifeq ($(subdir),misc) |
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sysdep_headers += sys/platform/ppc.h |
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tests += test-gettimebase |
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tests += tst-set_ppr |
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- |
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-# This test is expected to run and exit with EXIT_UNSUPPORTED on |
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-# processors that do not implement the Power ISA 2.06 or greater. |
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-# But the test makes use of instructions from Power ISA 2.06 and 2.07. |
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-CFLAGS-tst-set_ppr.c += -Wa,-many |
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endif |
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ifeq ($(subdir),wcsmbs) |
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diff --git a/sysdeps/powerpc/tst-set_ppr.c b/sysdeps/powerpc/tst-set_ppr.c |
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index 7684f5d6ea905c60..e80da15320635585 100644 |
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--- a/sysdeps/powerpc/tst-set_ppr.c |
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+++ b/sysdeps/powerpc/tst-set_ppr.c |
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@@ -44,7 +44,8 @@ get_thread_priority (void) |
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{ |
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/* Read the PPR. */ |
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ppr_t ppr; |
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- asm volatile (MFPPR" %0" : "=r"(ppr)); |
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+ asm volatile (".machine push; .machine power7; "MFPPR" %0; .machine pop" |
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+ : "=r"(ppr)); |
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/* Return the thread priority value. */ |
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return EXTRACT_THREAD_PRIORITY (ppr); |
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}
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