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| author | Florian Weimer <fweimer@redhat.com> | 2025-03-28 09:26:59 +0100 |
|---|---|---|
| committer | Florian Weimer <fweimer@redhat.com> | 2025-03-29 09:17:38 +0100 |
| commit | 145097dff170507fe73190e8e41194f5b5f7e6bf (patch) | |
| tree | 1c8665d5bc4921d5c12e51273cee7d46a4a12ab8 /sysdeps/x86_64 | |
| parent | 59585ddaa2d44f22af04bb4b8bd4ad1e302c4c02 (diff) | |
| download | glibc-145097dff170507fe73190e8e41194f5b5f7e6bf.tar.xz glibc-145097dff170507fe73190e8e41194f5b5f7e6bf.zip | |
x86: Use separate variable for TLSDESC XSAVE/XSAVEC state size (bug 32810)
Previously, the initialization code reused the xsave_state_full_size
member of struct cpu_features for the TLSDESC state size. However,
the tunable processing code assumes that this member has the
original XSAVE (non-compact) state size, so that it can use its
value if XSAVEC is disabled via tunable.
This change uses a separate variable and not a struct member because
the value is only needed in ld.so and the static libc, but not in
libc.so. As a result, struct cpu_features layout does not change,
helping a future backport of this change.
Fixes commit 9b7091415af47082664717210ac49d51551456ab ("x86-64:
Update _dl_tlsdesc_dynamic to preserve AMX registers").
Reviewed-by: H.J. Lu <hjl.tools@gmail.com>
Diffstat (limited to 'sysdeps/x86_64')
| -rw-r--r-- | sysdeps/x86_64/dl-tlsdesc-dynamic.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/sysdeps/x86_64/dl-tlsdesc-dynamic.h b/sysdeps/x86_64/dl-tlsdesc-dynamic.h index 9965ddd2c0..4f496de8c8 100644 --- a/sysdeps/x86_64/dl-tlsdesc-dynamic.h +++ b/sysdeps/x86_64/dl-tlsdesc-dynamic.h @@ -99,7 +99,7 @@ _dl_tlsdesc_dynamic: # endif #else /* Allocate stack space of the required size to save the state. */ - sub _rtld_local_ro+RTLD_GLOBAL_RO_DL_X86_CPU_FEATURES_OFFSET+XSAVE_STATE_FULL_SIZE_OFFSET(%rip), %RSP_LP + sub _dl_x86_features_tlsdesc_state_size(%rip), %RSP_LP #endif /* Besides rdi and rsi, saved above, save rcx, rdx, r8, r9, r10 and r11. */ |