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selftests/powerpc: Fix build errors in powerpc ptrace selftests

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GCC 7 will take "r2" in clobber list as an error and it will get
following build errors for powerpc ptrace selftests even with -fno-pic
option:
  ptrace-tm-vsx.c: In function ‘tm_vsx’:
  ptrace-tm-vsx.c:42:2: error: PIC register clobbered by ‘r2’ in ‘asm’
    asm __volatile__(
    ^~~
  make[1]: *** [ptrace-tm-vsx] Error 1
  ptrace-tm-spd-vsx.c: In function ‘tm_spd_vsx’:
  ptrace-tm-spd-vsx.c:55:2: error: PIC register clobbered by ‘r2’ in ‘asm’
    asm __volatile__(
    ^~~
  make[1]: *** [ptrace-tm-spd-vsx] Error 1
  ptrace-tm-spr.c: In function ‘tm_spr’:
  ptrace-tm-spr.c:46:2: error: PIC register clobbered by ‘r2’ in ‘asm’
    asm __volatile__(
    ^~~

Fix the build error by removing "r2" from the clobber list. None of
these asm blocks actually clobber r2.

Reported-by: Seth Forshee <seth.forshee@canonical.com>
Signed-off-by: Simon Guo <wei.guo.simon@gmail.com>
Tested-by: Seth Forshee <seth.forshee@canonical.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This commit is contained in:
Simon Guo 2017-09-01 10:17:14 +08:00 committed by Michael Ellerman
parent 608c0d8804
commit f36dbfe1a5
3 changed files with 4 additions and 5 deletions
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4
tools/testing/selftests/powerpc/ptrace/ptrace-tm-spd-vsx.c
View file

@ -79,8 +79,8 @@ void tm_spd_vsx(void)
: [res] "=r" (result), [texasr] "=r" (texasr)
: [fp_load] "r" (fp_load), [fp_load_ckpt] "r" (fp_load_ckpt),
[sprn_texasr] "i" (SPRN_TEXASR)
: "memory", "r0", "r1", "r2", "r3", "r4",
"r8", "r9", "r10", "r11"
: "memory", "r0", "r1", "r3", "r4",
"r7", "r8", "r9", "r10", "r11"
);
if (result) {

3
tools/testing/selftests/powerpc/ptrace/ptrace-tm-spr.c
View file

@ -76,8 +76,7 @@ void tm_spr(void)
: [tfhar] "=r" (tfhar), [res] "=r" (result),
[texasr] "=r" (texasr), [cptr1] "=r" (cptr1)
: [sprn_texasr] "i" (SPRN_TEXASR)
: "memory", "r0", "r1", "r2", "r3", "r4",
"r8", "r9", "r10", "r11", "r31"
: "memory", "r0", "r8", "r31"
);
/* There are 2 32bit instructions before tbegin. */

2
tools/testing/selftests/powerpc/ptrace/ptrace-tm-vsx.c
View file

@ -67,7 +67,7 @@ void tm_vsx(void)
: [res] "=r" (result), [texasr] "=r" (texasr)
: [fp_load] "r" (fp_load), [fp_load_ckpt] "r" (fp_load_ckpt),
[sprn_texasr] "i" (SPRN_TEXASR), [cptr1] "r" (&cptr[1])
: "memory", "r0", "r1", "r2", "r3", "r4",
: "memory", "r0", "r1", "r3", "r4",
"r7", "r8", "r9", "r10", "r11"
);