From 020b2a97bb15f807c0482f0faee2184ed05bcad8 Mon Sep 17 00:00:00 2001 From: Dragan Mladjenovic Date: Tue, 19 Nov 2019 15:06:20 +0100 Subject: mips: Do not include hi and lo in __SYSCALL_CLOBBERS for R6 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit GCC 10 (PR 91233) won't silently allow registers that are not architecturally available to be present in the clobber list anymore, resulting in build failure for mips*r6 targets in form of: ... .../sysdep.h:146:2: error: the register ‘lo’ cannot be clobbered in ‘asm’ for the current target 146 | __asm__ volatile ( \ | ^~~~~~~ This is because base R6 ISA doesn't define hi and lo registers w/o DSP extension. This patch provides the alternative definitions of __SYSCALL_CLOBBERS for r6 targets that won't include those registers. * sysdeps/unix/sysv/linux/mips/mips32/sysdep.h (__SYSCALL_CLOBBERS): Exclude hi and lo from the clobber list for __mips_isa_rev >= 6. * sysdeps/unix/sysv/linux/mips/mips64/n32/sysdep.h (__SYSCALL_CLOBBERS): Likewise. * sysdeps/unix/sysv/linux/mips/mips64/n64/sysdep.h (__SYSCALL_CLOBBERS): Likewise. --- sysdeps/unix/sysv/linux/mips/mips64/n64/sysdep.h | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-) (limited to 'sysdeps/unix/sysv/linux/mips/mips64/n64') diff --git a/sysdeps/unix/sysv/linux/mips/mips64/n64/sysdep.h b/sysdeps/unix/sysv/linux/mips/mips64/n64/sysdep.h index 821dec920a..8df4d9b961 100644 --- a/sysdeps/unix/sysv/linux/mips/mips64/n64/sysdep.h +++ b/sysdeps/unix/sysv/linux/mips/mips64/n64/sysdep.h @@ -290,8 +290,13 @@ _sys_result; \ }) -#define __SYSCALL_CLOBBERS "$1", "$3", "$10", "$11", "$12", "$13", \ - "$14", "$15", "$24", "$25", "hi", "lo", "memory" +#if __mips_isa_rev >= 6 +# define __SYSCALL_CLOBBERS "$1", "$3", "$10", "$11", "$12", "$13", \ + "$14", "$15", "$24", "$25", "memory" +#else +# define __SYSCALL_CLOBBERS "$1", "$3", "$10", "$11", "$12", "$13", \ + "$14", "$15", "$24", "$25", "hi", "lo", "memory" +#endif #endif /* __ASSEMBLER__ */ -- cgit 1.4.1