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powerpc64: Select POWER9 machine for the scv instruction

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It is not available with the baseline ISA.

Fixes commit 68ab82f566
("powerpc: Runtime selection between sc and scv for syscalls").

Reviewed-by: Tulio Magno Quites Machado Filho <tuliom@linux.ibm.com>
This commit is contained in:
Florian Weimer
2021-01-21 18:16:49 +01:00
parent 7a5ab88e21
commit 527c89cd32
3 changed files with 10 additions and 1 deletions
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3
sysdeps/unix/sysv/linux/powerpc/powerpc64/clone.S
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@ -76,7 +76,10 @@ ENTRY (__clone)
because it uses CFI directives and we just called cfi_endproc. */
mflr r9
std r9,FRAME_LR_SAVE(r1)
.machine "push"
.machine "power9"
scv 0
.machine "pop"
ld r9,FRAME_LR_SAVE(r1)
mtlr r9

5
sysdeps/unix/sysv/linux/powerpc/sysdep.h
View File

@ -76,7 +76,10 @@
#define SYSCALL_SCV(nr) \
({ \
__asm__ __volatile__ \
("scv 0\n\t" \
(".machine \"push\"\n\t" \
".machine \"power9\"\n\t" \
"scv 0\n\t" \
".machine \"pop\"\n\t" \
"0:" \
: "=&r" (r0), \
"=&r" (r3), "=&r" (r4), "=&r" (r5), \