mirror of
https://sourceware.org/git/glibc.git
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f6add169c8
Add a line that was missing from a previous commit.
Without increasing str, the null-byte is not validated, and
_dl_string_platform returns -1.
Fixes: d2ba3677da ("powerpc: Add support for POWER10")
Reviewed-by: Carlos O'Donell <carlos@redhat.com>
247 lines
6.3 KiB
C
247 lines
6.3 KiB
C
/* Processor capability information handling macros. PowerPC version.
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Copyright (C) 2005-2020 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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#ifndef _DL_PROCINFO_H
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#define _DL_PROCINFO_H 1
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#include <ldsodefs.h>
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#include <sysdep.h> /* This defines the PPC_FEATURE[2]_* macros. */
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/* The total number of available bits (including those prior to
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_DL_HWCAP_FIRST). Some of these bits might not be used. */
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#define _DL_HWCAP_COUNT 64
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/* Features started at bit 31 and decremented as new features were added. */
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#define _DL_HWCAP_LAST 31
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/* AT_HWCAP2 features started at bit 31 and decremented as new features were
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added. HWCAP2 feature bits start at bit 0. */
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#define _DL_HWCAP2_LAST 31
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/* These bits influence library search. */
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#define HWCAP_IMPORTANT (PPC_FEATURE_HAS_ALTIVEC \
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+ PPC_FEATURE_HAS_DFP)
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#define _DL_PLATFORMS_COUNT 16
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#define _DL_FIRST_PLATFORM 32
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/* Mask to filter out platforms. */
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#define _DL_HWCAP_PLATFORM (((1ULL << _DL_PLATFORMS_COUNT) - 1) \
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<< _DL_FIRST_PLATFORM)
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/* Platform bits (relative to _DL_FIRST_PLATFORM). */
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#define PPC_PLATFORM_POWER4 0
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#define PPC_PLATFORM_PPC970 1
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#define PPC_PLATFORM_POWER5 2
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#define PPC_PLATFORM_POWER5_PLUS 3
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#define PPC_PLATFORM_POWER6 4
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#define PPC_PLATFORM_CELL_BE 5
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#define PPC_PLATFORM_POWER6X 6
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#define PPC_PLATFORM_POWER7 7
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#define PPC_PLATFORM_PPCA2 8
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#define PPC_PLATFORM_PPC405 9
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#define PPC_PLATFORM_PPC440 10
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#define PPC_PLATFORM_PPC464 11
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#define PPC_PLATFORM_PPC476 12
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#define PPC_PLATFORM_POWER8 13
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#define PPC_PLATFORM_POWER9 14
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#define PPC_PLATFORM_POWER10 15
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static inline const char *
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__attribute__ ((unused))
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_dl_hwcap_string (int idx)
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{
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return GLRO(dl_powerpc_cap_flags)[idx];
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}
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static inline int
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__attribute__ ((unused))
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_dl_string_hwcap (const char *str)
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{
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for (int i = 0; i < _DL_HWCAP_COUNT; ++i)
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if (strcmp (str, _dl_hwcap_string (i)) == 0)
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return i;
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return -1;
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}
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static inline int
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__attribute__ ((unused, always_inline))
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_dl_string_platform (const char *str)
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{
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if (str == NULL)
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return -1;
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if (strncmp (str, "power", 5) == 0)
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{
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int ret;
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str += 5;
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switch (*str)
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{
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case '1':
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if (str[1] == '0')
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{
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ret = _DL_FIRST_PLATFORM + PPC_PLATFORM_POWER10;
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str++;
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}
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else
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return -1;
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break;
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case '4':
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ret = _DL_FIRST_PLATFORM + PPC_PLATFORM_POWER4;
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break;
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case '5':
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ret = _DL_FIRST_PLATFORM + PPC_PLATFORM_POWER5;
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if (str[1] == '+')
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{
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ret = _DL_FIRST_PLATFORM + PPC_PLATFORM_POWER5_PLUS;
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++str;
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}
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break;
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case '6':
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ret = _DL_FIRST_PLATFORM + PPC_PLATFORM_POWER6;
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if (str[1] == 'x')
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{
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ret = _DL_FIRST_PLATFORM + PPC_PLATFORM_POWER6X;
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++str;
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}
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break;
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case '7':
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ret = _DL_FIRST_PLATFORM + PPC_PLATFORM_POWER7;
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break;
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case '8':
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ret = _DL_FIRST_PLATFORM + PPC_PLATFORM_POWER8;
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break;
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case '9':
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ret = _DL_FIRST_PLATFORM + PPC_PLATFORM_POWER9;
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break;
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default:
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return -1;
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}
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if (str[1] == '\0')
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return ret;
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}
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else if (strncmp (str, "ppc", 3) == 0)
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{
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if (strcmp (str + 3, "970") == 0)
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return _DL_FIRST_PLATFORM + PPC_PLATFORM_PPC970;
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else if (strcmp (str + 3, "-cell-be") == 0)
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return _DL_FIRST_PLATFORM + PPC_PLATFORM_CELL_BE;
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else if (strcmp (str + 3, "a2") == 0)
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return _DL_FIRST_PLATFORM + PPC_PLATFORM_PPCA2;
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else if (strcmp (str + 3, "405") == 0)
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return _DL_FIRST_PLATFORM + PPC_PLATFORM_PPC405;
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else if (strcmp (str + 3, "440") == 0)
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return _DL_FIRST_PLATFORM + PPC_PLATFORM_PPC440;
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else if (strcmp (str + 3, "464") == 0)
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return _DL_FIRST_PLATFORM + PPC_PLATFORM_PPC464;
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else if (strcmp (str + 3, "476") == 0)
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return _DL_FIRST_PLATFORM + PPC_PLATFORM_PPC476;
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}
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return -1;
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}
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#if IS_IN (rtld)
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static inline void
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cache_geometry (const char * name, unsigned long int geometry)
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{
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unsigned long int assocty, line;
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_dl_printf ("%s", name);
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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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}
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static inline int
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__attribute__ ((unused))
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_dl_procinfo (unsigned int type, unsigned long int word)
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{
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switch(type)
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{
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case AT_HWCAP:
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_dl_printf ("AT_HWCAP: ");
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for (int i = 0; i <= _DL_HWCAP_LAST; ++i)
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if (word & (1 << i))
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_dl_printf (" %s", _dl_hwcap_string (i));
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break;
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case AT_HWCAP2:
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{
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unsigned int offset = _DL_HWCAP_LAST + 1;
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_dl_printf ("AT_HWCAP2: ");
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/* We have to go through them all because the kernel added the
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AT_HWCAP2 features starting with the high bits. */
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for (int i = 0; i <= _DL_HWCAP2_LAST; ++i)
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if (word & (1 << i))
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_dl_printf (" %s", _dl_hwcap_string (offset + i));
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break;
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}
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case AT_L1I_CACHEGEOMETRY:
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{
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cache_geometry ("AT_L1I_CACHEGEOMETRY: ", word);
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break;
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}
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case AT_L1D_CACHEGEOMETRY:
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{
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cache_geometry ("AT_L1D_CACHEGEOMETRY: ", word);
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break;
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}
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case AT_L2_CACHEGEOMETRY:
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{
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cache_geometry ("AT_L2_CACHEGEOMETRY: ", word);
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break;
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}
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case AT_L3_CACHEGEOMETRY:
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{
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cache_geometry ("AT_L3_CACHEGEOMETRY: ", word);
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break;
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}
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default:
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/* Fallback to generic output mechanism. */
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return -1;
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}
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_dl_printf ("\n");
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return 0;
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}
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#endif
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#endif /* dl-procinfo.h */
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