29 lines
1.1 KiB
Diff
29 lines
1.1 KiB
Diff
Add diagnostics for missing z14 support. Not yet upstream. Discussion
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is here:
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s390x: Diagnose missing VXE at run time if required at build time
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<https://sourceware.org/pipermail/libc-alpha/2021-April/124834.html>
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The approach implemented by upstream will likely be slightly different
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(if upstream takes the patch at all). dl_platform_init does not work
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for POWER because POWER9 instructions are used in __tunables_init,
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which is called before DL_PLATFORM_INIT/dl_platform_init.
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diff --git a/sysdeps/s390/s390-64/dl-machine.h b/sysdeps/s390/s390-64/dl-machine.h
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index 543361c83637c071..deaf37951206fb7c 100644
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--- a/sysdeps/s390/s390-64/dl-machine.h
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+++ b/sysdeps/s390/s390-64/dl-machine.h
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@@ -235,6 +235,12 @@ _dl_start_user:\n\
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static inline void __attribute__ ((unused))
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dl_platform_init (void)
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{
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+#ifdef __LONG_DOUBLE_VX__
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+ if (!(GLRO(dl_hwcap) & HWCAP_S390_VXE))
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+ _dl_fatal_printf ("\
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+Fatal glibc error: CPU lacks VXE support (z14 or later required)\n");
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+#endif
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+
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if (GLRO(dl_platform) != NULL && *GLRO(dl_platform) == '\0')
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/* Avoid an empty string which would disturb us. */
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GLRO(dl_platform) = NULL;
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