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| author | H.J. Lu <hjl.tools@gmail.com> | 2021-03-16 07:41:46 -0700 |
|---|---|---|
| committer | H.J. Lu <hjl.tools@gmail.com> | 2021-04-01 07:00:22 -0700 |
| commit | b1ec623ed50bb8c7b9b6333fa350c3866dbde87f (patch) | |
| tree | cc3823d84b34ab9b997c3feac0a906b598cae115 /sysdeps/x86_64/nptl/tls.h | |
| parent | 5ccea9a011c010448999a71d2be1cd1906d7c9f5 (diff) | |
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x86_64: Correct THREAD_SETMEM/THREAD_SETMEM_NC for movq [BZ #27591]
config/i386/constraints.md in GCC has
(define_constraint "e"
"32-bit signed integer constant, or a symbolic reference known
to fit that range (for immediate operands in sign-extending x86-64
instructions)."
(match_operand 0 "x86_64_immediate_operand"))
Since movq takes a signed 32-bit immediate or a register source operand,
use "er", instead of "nr"/"ir", constraint for 32-bit signed integer
constant or register on movq.
Reviewed-by: Carlos O'Donell <carlos@redhat.com>
Diffstat (limited to 'sysdeps/x86_64/nptl/tls.h')
| -rw-r--r-- | sysdeps/x86_64/nptl/tls.h | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/sysdeps/x86_64/nptl/tls.h b/sysdeps/x86_64/nptl/tls.h index 20f0958780..a78c4f4d01 100644 --- a/sysdeps/x86_64/nptl/tls.h +++ b/sysdeps/x86_64/nptl/tls.h @@ -271,8 +271,11 @@ _Static_assert (offsetof (tcbhead_t, __glibc_unused2) == 0x80, "i" (offsetof (struct pthread, member))); \ else /* 8 */ \ { \ + /* Since movq takes a signed 32-bit immediate or a register source \ + operand, use "er" constraint for 32-bit signed integer constant \ + or register. */ \ asm volatile ("movq %q0,%%fs:%P1" : \ - : IMM_MODE ((uint64_t) cast_to_integer (value)), \ + : "er" ((uint64_t) cast_to_integer (value)), \ "i" (offsetof (struct pthread, member))); \ }}) @@ -296,8 +299,11 @@ _Static_assert (offsetof (tcbhead_t, __glibc_unused2) == 0x80, "r" (idx)); \ else /* 8 */ \ { \ + /* Since movq takes a signed 32-bit immediate or a register source \ + operand, use "er" constraint for 32-bit signed integer constant \ + or register. */ \ asm volatile ("movq %q0,%%fs:%P1(,%q2,8)" : \ - : IMM_MODE ((uint64_t) cast_to_integer (value)), \ + : "er" ((uint64_t) cast_to_integer (value)), \ "i" (offsetof (struct pthread, member[0])), \ "r" (idx)); \ }}) |