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| author | Alan Modra <amodra@gmail.com> | 2022-01-24 07:58:18 +1030 |
|---|---|---|
| committer | Alan Modra <amodra@gmail.com> | 2022-04-10 08:33:40 +0930 |
| commit | 31a9bc8c55adc2a8d6f8f795a577ba5d5eca7506 (patch) | |
| tree | bc13ea619de5d93042bd2c1335af37a51e9c5baa /sysdeps/powerpc/hwcapinfo.h | |
| parent | d6efcc118e406a1cfeb309f835d7118df53419bb (diff) | |
| download | glibc-31a9bc8c55adc2a8d6f8f795a577ba5d5eca7506.tar.gz glibc-31a9bc8c55adc2a8d6f8f795a577ba5d5eca7506.tar.xz glibc-31a9bc8c55adc2a8d6f8f795a577ba5d5eca7506.zip | |
powerpc64: Set up thread register for _dl_relocate_static_pie
libgcc ifunc resolvers that access hwcap via a field in the tcb can't be called until the thread pointer is set up. Other ifunc resolvers might need access to at_platform. This patch sets up a fake thread pointer early to a copy of tcbhead_t. hwcapinfo.c already had local variables for hwcap and at_platform, replace them with an entire tcbhead_t. It's not that large and this way we easily ensure hwcap and at_platform are at the same relative offsets as they are in the real thread block. The patch also conditionally disables part of tst-tlsifunc-static, "bar address read from IFUNC resolver is incorrect". We can't get a proper address for a thread variable before glibc initialises tls. Reviewed-by: Tulio Magno Quites Machado Filho <tuliom@linux.ibm.com>
Diffstat (limited to 'sysdeps/powerpc/hwcapinfo.h')
| -rw-r--r-- | sysdeps/powerpc/hwcapinfo.h | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/sysdeps/powerpc/hwcapinfo.h b/sysdeps/powerpc/hwcapinfo.h index ac462835ce..1f5e0bcb51 100644 --- a/sysdeps/powerpc/hwcapinfo.h +++ b/sysdeps/powerpc/hwcapinfo.h @@ -21,8 +21,7 @@ #ifndef HWCAPINFO_H # define HWCAPINFO_H -extern uint64_t __tcb_hwcap attribute_hidden; -extern uint32_t __tcb_platform attribute_hidden; +extern tcbhead_t __tcb attribute_hidden; extern void __tcb_parse_hwcap_and_convert_at_platform (void); |