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a768993c10
From LD_SHOW_AUXV output. Checked on powerpc64le-linux-gnu. Reviewed-by: Peter Bergner <bergner@linux.ibm.com>
97 lines
2.9 KiB
C
97 lines
2.9 KiB
C
/* Print CPU diagnostics data in ld.so. PowerPC version.
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Copyright (C) 2025 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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#include <dl-diagnostics.h>
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#include <dl-hwcap-info.h>
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#include <ldsodefs.h>
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#include <sys/auxv.h>
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static void
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print_hwcap_value (const char *label, int hwcap, unsigned long int value)
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{
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_dl_printf ("powerpc.cpu_features.%s=\"", label);
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size_t offset = 0;
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for (int i = 0; i < __dl_hwcap_info_size; ++i)
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{
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const char *hwcap_name = __dl_hwcap_names + offset;
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size_t hwcap_name_len = strlen (hwcap_name);
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if (hwcap == __dl_hwcap_info[i].hwcap
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&& value & __dl_hwcap_info[i].value)
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_dl_printf ("%s ", hwcap_name);
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offset += hwcap_name_len + 1;
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}
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_dl_printf ("\"\n");
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}
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static void
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print_cache_geometry_value (const char *label, unsigned long int geometry)
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{
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unsigned long int assocty, line;
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_dl_printf ("powerpc.cpu_features.%s=\"", label);
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line = geometry & 0xffff;
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assocty = (geometry >> 16) & 0xffff;
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if (line == 0)
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_dl_printf ("Unknown line size, ");
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else
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_dl_printf ("%luB line size, ", line);
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switch (assocty)
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{
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case 0:
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_dl_printf ("Unknown associativity");
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break;
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case 1:
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_dl_printf ("Directly mapped");
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break;
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case 0xffff:
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_dl_printf ("Fully associative");
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break;
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default:
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_dl_printf ("%lu-way set associative", assocty);
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}
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_dl_printf ("\"\n");
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}
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void
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_dl_diagnostics_cpu (void)
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{
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print_hwcap_value ("hwcap", AT_HWCAP, GLRO(dl_hwcap));
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print_hwcap_value ("hwcap2", AT_HWCAP2, GLRO(dl_hwcap2));
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print_hwcap_value ("hwcap3", AT_HWCAP3, GLRO(dl_hwcap3));
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print_hwcap_value ("hwcap4", AT_HWCAP4, GLRO(dl_hwcap4));
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for (ElfW(auxv_t) *av = GLRO(dl_auxv); av->a_type != AT_NULL; ++av)
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switch (av->a_type)
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{
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case AT_L1I_CACHEGEOMETRY:
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print_cache_geometry_value ("l1i_cachegeometry", av->a_un.a_val);
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break;
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case AT_L1D_CACHEGEOMETRY:
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print_cache_geometry_value ("l1d_cachegeometry", av->a_un.a_val);
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break;
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case AT_L2_CACHEGEOMETRY:
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print_cache_geometry_value ("l2_cachegeometry", av->a_un.a_val);
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break;
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case AT_L3_CACHEGEOMETRY:
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print_cache_geometry_value ("l3_cachegeometry", av->a_un.a_val);
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break;
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}
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}
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