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aarch64: Use tpidr_el0 rather than __errno_location in librt

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This commit is contained in:
Richard Henderson 2014-05-20 16:34:59 -04:00
parent a17e5ffb80
commit 11a28aee60
3 changed files with 12 additions and 16 deletions
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8
ChangeLog
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@ -1,7 +1,13 @@
2014-05-29 Richard Henderson <rth@twiddle.net>
* sysdeps/unix/sysv/linux/aarch64/sysdep.h [NOT_IN_libc]
(SYSCALL_ERROR_HANDLER): Use tpidr_el0 instead of a call
to __errno_location.
* sysdeps/unix/sysv/linux/aarch64/nptl/localplt.data (libpthread.so):
Remove the expected plt for __errno_location.
* sysdeps/unix/sysv/linux/aarch64/nptl/sysdep-cancel.h
[!NOT_IN_libc] (SINGLE_THREAD_P): Use tpidr_el0 instead of a
[NOT_IN_libc] (SINGLE_THREAD_P): Use tpidr_el0 instead of a
call to __read_tp.
* sysdeps/unix/sysv/linux/aarch64/nptl/sysdep-cancel.h (PSEUDO):

1
sysdeps/unix/sysv/linux/aarch64/nptl/localplt.data
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@ -12,4 +12,3 @@ libm.so: matherr
libm.so: __signbit
libm.so: __signbitf
libm.so: __signbitl
libpthread.so: __errno_location

19
sysdeps/unix/sysv/linux/aarch64/sysdep.h
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@ -123,21 +123,12 @@
# define SYSCALL_ERROR_HANDLER \
.Lsyscall_error: \
stp x29, x30, [sp, -32]!; \
cfi_adjust_cfa_offset (32); \
cfi_rel_offset (x29, 0); \
cfi_rel_offset (x30, 8); \
add x29, sp, 0; \
str x19, [sp,16]; \
neg x19, x0; \
bl C_SYMBOL_NAME(__errno_location); \
str w19, [x0]; \
adrp x1, :gottprel:errno; \
neg w2, w0; \
ldr x1, [x1, :gottprel_lo12:errno]; \
mrs x3, tpidr_el0; \
mov x0, -1; \
ldr x19, [sp,16]; \
ldp x29, x30, [sp], 32; \
cfi_adjust_cfa_offset (-32); \
cfi_restore (x29); \
cfi_restore (x30); \
str w2, [x1, x3]; \
RET;
# endif
# else