diff options
| -rw-r--r-- | elf/dl-support.c | 3 | ||||
| -rw-r--r-- | elf/dl-sysdep.c | 3 | ||||
| -rw-r--r-- | sysdeps/generic/dl-auxv.h | 21 | ||||
| -rw-r--r-- | sysdeps/powerpc/Makefile | 17 | ||||
| -rw-r--r-- | sysdeps/powerpc/dl-procinfo.c | 17 | ||||
| -rw-r--r-- | sysdeps/powerpc/mod-cache-ppc.c | 45 | ||||
| -rw-r--r-- | sysdeps/powerpc/powerpc32/a2/memcpy.S | 23 | ||||
| -rw-r--r-- | sysdeps/powerpc/powerpc32/dl-machine.c | 11 | ||||
| -rw-r--r-- | sysdeps/powerpc/powerpc32/memset.S | 29 | ||||
| -rw-r--r-- | sysdeps/powerpc/powerpc32/sysdep.h | 26 | ||||
| -rw-r--r-- | sysdeps/powerpc/powerpc64/a2/memcpy.S | 13 | ||||
| -rw-r--r-- | sysdeps/powerpc/powerpc64/memset.S | 11 | ||||
| -rw-r--r-- | sysdeps/powerpc/powerpc64/sysdep.h | 24 | ||||
| -rw-r--r-- | sysdeps/powerpc/rtld-global-offsets.sym | 1 | ||||
| -rw-r--r-- | sysdeps/powerpc/tst-cache-ppc-static-dlopen.c | 54 | ||||
| -rw-r--r-- | sysdeps/powerpc/tst-cache-ppc-static.c | 20 | ||||
| -rw-r--r-- | sysdeps/powerpc/tst-cache-ppc.c | 29 | ||||
| -rw-r--r-- | sysdeps/unix/sysv/linux/powerpc/dl-auxv.h (renamed from sysdeps/unix/sysv/linux/powerpc/dl-sysdep.c) | 19 | ||||
| -rw-r--r-- | sysdeps/unix/sysv/linux/powerpc/dl-static.c | 3 | ||||
| -rw-r--r-- | sysdeps/unix/sysv/linux/powerpc/libc-start.c | 10 |
20 files changed, 312 insertions, 67 deletions
diff --git a/elf/dl-support.c b/elf/dl-support.c index ad791ab..7704c10 100644 --- a/elf/dl-support.c +++ b/elf/dl-support.c @@ -36,6 +36,7 @@ #include <stackinfo.h> #include <dl-vdso.h> #include <dl-vdso-setup.h> +#include <dl-auxv.h> extern char *__progname; char **_dl_argv = &__progname; /* This is checked for some error messages. */ @@ -293,9 +294,7 @@ _dl_aux_init (ElfW(auxv_t) *av) case AT_RANDOM: _dl_random = (void *) av->a_un.a_val; break; -# ifdef DL_PLATFORM_AUXV DL_PLATFORM_AUXV -# endif } if (seen == 0xf) { diff --git a/elf/dl-sysdep.c b/elf/dl-sysdep.c index 53bbee1..8545708 100644 --- a/elf/dl-sysdep.c +++ b/elf/dl-sysdep.c @@ -45,6 +45,7 @@ #include <tls.h> #include <dl-tunables.h> +#include <dl-auxv.h> extern char **_environ attribute_hidden; extern char _end[] attribute_hidden; @@ -180,9 +181,7 @@ _dl_sysdep_start (void **start_argptr, case AT_RANDOM: _dl_random = (void *) av->a_un.a_val; break; -#ifdef DL_PLATFORM_AUXV DL_PLATFORM_AUXV -#endif } #ifndef HAVE_AUX_SECURE diff --git a/sysdeps/generic/dl-auxv.h b/sysdeps/generic/dl-auxv.h new file mode 100644 index 0000000..bf3c011 --- /dev/null +++ b/sysdeps/generic/dl-auxv.h @@ -0,0 +1,21 @@ +/* Auxiliary vector processing. Generic version. + Copyright (C) 2020 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, see + <https://www.gnu.org/licenses/>. */ + +/* Define DL_PLATFORM_AUXV in order to process platform-specific AUXV entries + during the initialization of the loader or of a static libc. */ +#define DL_PLATFORM_AUXV diff --git a/sysdeps/powerpc/Makefile b/sysdeps/powerpc/Makefile index df45d34..d1c71a0 100644 --- a/sysdeps/powerpc/Makefile +++ b/sysdeps/powerpc/Makefile @@ -14,6 +14,23 @@ mod-tlsopt-powerpc.so-no-z-defs = yes tests += tst-tlsopt-powerpc $(objpfx)tst-tlsopt-powerpc: $(objpfx)mod-tlsopt-powerpc.so +tests-static += tst-cache-ppc-static +tests-internal += tst-cache-ppc-static + +ifeq (yes,$(build-shared)) +modules-names += mod-cache-ppc +tests += tst-cache-ppc tst-cache-ppc-static-dlopen +tests-static += tst-cache-ppc-static-dlopen +test-internal-extras += mod-cache-ppc + +mod-cache-ppc.so-no-z-defs = yes +tst-cache-ppc-static-dlopen-ENV = LD_LIBRARY_PATH=$(objpfx):$(common-objpfx):$(common-objpfx)elf +$(objpfx)tst-cache-ppc-static-dlopen: $(common-objpfx)dlfcn/libdl.a +$(objpfx)tst-cache-ppc-static-dlopen.out: $(objpfx)mod-cache-ppc.so + +$(objpfx)tst-cache-ppc: $(objpfx)mod-cache-ppc.so +endif + ifneq (no,$(multi-arch)) tests-static += tst-tlsifunc-static tests-internal += tst-tlsifunc-static diff --git a/sysdeps/powerpc/dl-procinfo.c b/sysdeps/powerpc/dl-procinfo.c index 2ae68c4..7a7d93d 100644 --- a/sysdeps/powerpc/dl-procinfo.c +++ b/sysdeps/powerpc/dl-procinfo.c @@ -89,5 +89,22 @@ PROCINFO_CLASS const char _dl_powerpc_cap_flags[64][15] , #endif +#if !IS_IN (ldconfig) +# if !defined PROCINFO_DECL && defined SHARED + ._dl_cache_line_size +# else +PROCINFO_CLASS int _dl_cache_line_size +# endif +# ifndef PROCINFO_DECL + = 0 +# endif +# if !defined SHARED || defined PROCINFO_DECL +; +# else +, +# endif +#endif + + #undef PROCINFO_DECL #undef PROCINFO_CLASS diff --git a/sysdeps/powerpc/mod-cache-ppc.c b/sysdeps/powerpc/mod-cache-ppc.c new file mode 100644 index 0000000..81fad52 --- /dev/null +++ b/sysdeps/powerpc/mod-cache-ppc.c @@ -0,0 +1,45 @@ +/* Test if an executable can read from rtld_global_ro._dl_cache_line_size. + Copyright (C) 2020 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, see + <https://www.gnu.org/licenses/>. */ + +#include <stdio.h> +#include <stdint.h> +#include <inttypes.h> +#include <sys/auxv.h> +#include <ldsodefs.h> +#include <errno.h> + +/* errnop is required in order to work around BZ #20802. */ +int +test_cache (int *errnop) +{ + int cls1 = GLRO (dl_cache_line_size); + errno = *errnop; + uint64_t cls2 = getauxval (AT_DCACHEBSIZE); + *errnop = errno; + + printf ("AT_DCACHEBSIZE = %" PRIu64 " B\n", cls2); + printf ("_dl_cache_line_size = %d B\n", cls1); + + if (cls1 != cls2) + { + printf ("error: _dl_cache_line_size != AT_DCACHEBSIZE\n"); + return 1; + } + + return 0; +} diff --git a/sysdeps/powerpc/powerpc32/a2/memcpy.S b/sysdeps/powerpc/powerpc32/a2/memcpy.S index fe5dab8..6f4d8a7 100644 --- a/sysdeps/powerpc/powerpc32/a2/memcpy.S +++ b/sysdeps/powerpc/powerpc32/a2/memcpy.S @@ -18,6 +18,7 @@ <https://www.gnu.org/licenses/>. */ #include <sysdep.h> +#include <rtld-global-offsets.h> #define PREFETCH_AHEAD 4 /* no cache lines SRC prefetching ahead */ #define ZERO_AHEAD 2 /* no cache lines DST zeroing ahead */ @@ -106,25 +107,23 @@ EALIGN (memcpy, 5, 0) L(dst_aligned): -#ifdef SHARED +#ifdef PIC mflr r0 -/* Establishes GOT addressability so we can load __cache_line_size - from static. This value was set from the aux vector during startup. */ +/* Establishes GOT addressability so we can load the cache line size + from rtld_global_ro. This value was set from the aux vector during + startup. */ SETUP_GOT_ACCESS(r9,got_label) - addis r9,r9,__cache_line_size-got_label@ha - lwz r9,__cache_line_size-got_label@l(r9) - mtlr r0 -#else -/* Load __cache_line_size from static. This value was set from the - aux vector during startup. */ - lis r9,__cache_line_size@ha - lwz r9,__cache_line_size@l(r9) + addis r9,r9,_GLOBAL_OFFSET_TABLE_-got_label@ha + addi r9,r9,_GLOBAL_OFFSET_TABLE_-got_label@l + mtlr r0 #endif + __GLRO(r9, r9, _dl_cache_line_size, + RTLD_GLOBAL_RO_DL_CACHE_LINE_SIZE_OFFSET) cmplwi cr5, r9, 0 bne+ cr5,L(cachelineset) -/* __cache_line_size not set: generic byte copy without much optimization */ +/* Cache line size not set: generic byte copy without much optimization */ andi. r0,r5,1 /* If length is odd copy one byte. */ beq L(cachelinenotset_align) lbz r7,0(r4) /* Read one byte from source. */ diff --git a/sysdeps/powerpc/powerpc32/dl-machine.c b/sysdeps/powerpc/powerpc32/dl-machine.c index d5ea4b9..6090e60 100644 --- a/sysdeps/powerpc/powerpc32/dl-machine.c +++ b/sysdeps/powerpc/powerpc32/dl-machine.c @@ -25,11 +25,6 @@ #include <dl-machine.h> #include <_itoa.h> -/* The value __cache_line_size is defined in dl-sysdep.c and is initialised - by _dl_sysdep_start via DL_PLATFORM_INIT. */ -extern int __cache_line_size attribute_hidden; - - /* Stuff for the PLT. */ #define PLT_INITIAL_ENTRY_WORDS 18 #define PLT_LONGBRANCH_ENTRY_WORDS 0 @@ -309,14 +304,14 @@ __elf_machine_runtime_setup (struct link_map *map, int lazy, int profile) Assumes that dcbst and icbi apply to lines of 16 bytes or more. Current known line sizes are 16, 32, and 128 bytes. - The following gets the __cache_line_size, when available. */ + The following gets the cache line size, when available. */ /* Default minimum 4 words per cache line. */ int line_size_words = 4; - if (lazy && __cache_line_size != 0) + if (lazy && GLRO(dl_cache_line_size) != 0) /* Convert bytes to words. */ - line_size_words = __cache_line_size / 4; + line_size_words = GLRO(dl_cache_line_size) / 4; size_modified = lazy ? rel_offset_words : 6; for (i = 0; i < size_modified; i += line_size_words) diff --git a/sysdeps/powerpc/powerpc32/memset.S b/sysdeps/powerpc/powerpc32/memset.S index 5f614c0..26c37f8 100644 --- a/sysdeps/powerpc/powerpc32/memset.S +++ b/sysdeps/powerpc/powerpc32/memset.S @@ -17,12 +17,13 @@ <https://www.gnu.org/licenses/>. */ #include <sysdep.h> +#include <rtld-global-offsets.h> /* void * [r3] memset (void *s [r3], int c [r4], size_t n [r5])); Returns 's'. The memset is done in four sizes: byte (8 bits), word (32 bits), - 32-byte blocks (256 bits) and __cache_line_size (128, 256, 1024 bits). + 32-byte blocks (256 bits) and cache line size (128, 256, 1024 bits). There is a special case for setting whole cache lines to 0, which takes advantage of the dcbz instruction. */ @@ -95,7 +96,7 @@ L(caligned): /* Check if we can use the special case for clearing memory using dcbz. This requires that we know the correct cache line size for this - processor. Getting the __cache_line_size may require establishing GOT + processor. Getting the cache line size may require establishing GOT addressability, so branch out of line to set this up. */ beq cr1, L(checklinesize) @@ -230,26 +231,22 @@ L(medium_28t): blr L(checklinesize): -#ifdef SHARED - mflr rTMP /* If the remaining length is less the 32 bytes then don't bother getting the cache line size. */ beq L(medium) -/* Establishes GOT addressability so we can load __cache_line_size - from static. This value was set from the aux vector during startup. */ +#ifdef PIC + mflr rTMP +/* Establishes GOT addressability so we can load the cache line size + from rtld_global_ro. This value was set from the aux vector during + startup. */ SETUP_GOT_ACCESS(rGOT,got_label) - addis rGOT,rGOT,__cache_line_size-got_label@ha - lwz rCLS,__cache_line_size-got_label@l(rGOT) + addis rGOT,rGOT,_GLOBAL_OFFSET_TABLE_-got_label@ha + addi rGOT,rGOT,_GLOBAL_OFFSET_TABLE_-got_label@l mtlr rTMP -#else -/* Load __cache_line_size from static. This value was set from the - aux vector during startup. */ - lis rCLS,__cache_line_size@ha -/* If the remaining length is less the 32 bytes then don't bother getting - the cache line size. */ - beq L(medium) - lwz rCLS,__cache_line_size@l(rCLS) #endif +/* Load rtld_global_ro._dl_cache_line_size. */ + __GLRO(rCLS, rGOT, _dl_cache_line_size, + RTLD_GLOBAL_RO_DL_CACHE_LINE_SIZE_OFFSET) /* If the cache line size was not set then goto to L(nondcbz), which is safe for any cache line size. */ diff --git a/sysdeps/powerpc/powerpc32/sysdep.h b/sysdeps/powerpc/powerpc32/sysdep.h index ceed9ef..0dee5f2 100644 --- a/sysdeps/powerpc/powerpc32/sysdep.h +++ b/sysdeps/powerpc/powerpc32/sysdep.h @@ -157,4 +157,30 @@ GOT_LABEL: ; \ /* Label in text section. */ #define C_TEXT(name) name +/* Read the value of member from rtld_global_ro. */ +#ifdef PIC +# ifdef SHARED +# if IS_IN (rtld) +/* Inside ld.so we use the local alias to avoid runtime GOT + relocations. */ +# define __GLRO(rOUT, rGOT, member, offset) \ + lwz rOUT,_rtld_local_ro@got(rGOT); \ + lwz rOUT,offset(rOUT) +# else +# define __GLRO(rOUT, rGOT, member, offset) \ + lwz rOUT,_rtld_global_ro@got(rGOT); \ + lwz rOUT,offset(rOUT) +# endif +# else +# define __GLRO(rOUT, rGOT, member, offset) \ + lwz rOUT,member@got(rGOT); \ + lwz rOUT,0(rOUT) +# endif +#else +/* Position-dependent code does not require access to the GOT. */ +# define __GLRO(rOUT, rGOT, member, offset) \ + lis rOUT,(member+LOWORD)@ha \ + lwz rOUT,(member+LOWORD)@l(rOUT) +#endif /* PIC */ + #endif /* __ASSEMBLER__ */ diff --git a/sysdeps/powerpc/powerpc64/a2/memcpy.S b/sysdeps/powerpc/powerpc64/a2/memcpy.S index 0e3c435..1162cc2 100644 --- a/sysdeps/powerpc/powerpc64/a2/memcpy.S +++ b/sysdeps/powerpc/powerpc64/a2/memcpy.S @@ -18,6 +18,7 @@ <https://www.gnu.org/licenses/>. */ #include <sysdep.h> +#include <rtld-global-offsets.h> #ifndef MEMCPY # define MEMCPY memcpy @@ -27,8 +28,9 @@ #define ZERO_AHEAD 2 /* no cache lines DST zeroing ahead */ .section ".toc","aw" -.LC0: - .tc __cache_line_size[TC],__cache_line_size +__GLRO_DEF(dl_cache_line_size) + + .section ".text" .align 2 @@ -55,10 +57,11 @@ ENTRY (MEMCPY, 5) */ neg r8,r3 /* LS 4 bits = # bytes to 8-byte dest bdry */ - ld r9,.LC0@toc(r2) /* Get cache line size (part 1) */ + /* Get the cache line size. */ + __GLRO (r9, dl_cache_line_size, + RTLD_GLOBAL_RO_DL_CACHE_LINE_SIZE_OFFSET) clrldi r8,r8,64-4 /* align to 16byte boundary */ sub r7,r4,r3 /* compute offset to src from dest */ - lwz r9,0(r9) /* Get cache line size (part 2) */ cmpldi cr0,r8,0 /* Were we aligned on a 16 byte bdy? */ addi r10,r9,-1 /* Cache line mask */ beq+ L(dst_aligned) @@ -121,7 +124,7 @@ L(dst_aligned): cmpdi cr0,r9,0 /* Cache line size set? */ bne+ cr0,L(cachelineset) -/* __cache_line_size not set: generic byte copy without much optimization */ +/* Cache line size not set: generic byte copy without much optimization */ clrldi. r0,r5,63 /* If length is odd copy one byte */ beq L(cachelinenotset_align) lbz r7,0(r4) /* Read one byte from source */ diff --git a/sysdeps/powerpc/powerpc64/memset.S b/sysdeps/powerpc/powerpc64/memset.S index 857c023..2fa98e6 100644 --- a/sysdeps/powerpc/powerpc64/memset.S +++ b/sysdeps/powerpc/powerpc64/memset.S @@ -17,10 +17,11 @@ <https://www.gnu.org/licenses/>. */ #include <sysdep.h> +#include <rtld-global-offsets.h> .section ".toc","aw" -.LC0: - .tc __cache_line_size[TC],__cache_line_size +__GLRO_DEF(dl_cache_line_size) + .section ".text" .align 2 @@ -146,8 +147,10 @@ L(zloopstart): /* If the remaining length is less the 32 bytes, don't bother getting the cache line size. */ beq L(medium) - ld rCLS,.LC0@toc(r2) - lwz rCLS,0(rCLS) + /* Read the cache line size. */ + __GLRO (rCLS, dl_cache_line_size, + RTLD_GLOBAL_RO_DL_CACHE_LINE_SIZE_OFFSET) + /* If the cache line size was not set just goto to L(nondcbz) which is safe for any cache line size. */ cmpldi cr1,rCLS,0 diff --git a/sysdeps/powerpc/powerpc64/sysdep.h b/sysdeps/powerpc/powerpc64/sysdep.h index aefd29a..d6616ac 100644 --- a/sysdeps/powerpc/powerpc64/sysdep.h +++ b/sysdeps/powerpc/powerpc64/sysdep.h @@ -342,6 +342,30 @@ LT_LABELSUFFIX(name,_name_end): ; \ #define PSEUDO_END_ERRVAL(name) \ END (name) +#ifdef SHARED +# if IS_IN (rtld) + /* Inside ld.so we use the local alias to avoid runtime GOT + relocations. */ +# define __GLRO_DEF(var) \ +.LC__ ## var: \ + .tc _rtld_local_ro[TC],_rtld_local_ro +# else +# define __GLRO_DEF(var) \ +.LC__ ## var: \ + .tc _rtld_global_ro[TC],_rtld_global_ro +# endif +# define __GLRO(rOUT, var, offset) \ + ld rOUT,.LC__ ## var@toc(r2); \ + lwz rOUT,offset(rOUT) +#else +# define __GLRO_DEF(var) \ +.LC__ ## var: \ + .tc _ ## var[TC],_ ## var +# define __GLRO(rOUT, var, offset) \ + ld rOUT,.LC__ ## var@toc(r2); \ + lwz rOUT,0(rOUT) +#endif + #else /* !__ASSEMBLER__ */ #if _CALL_ELF != 2 diff --git a/sysdeps/powerpc/rtld-global-offsets.sym b/sysdeps/powerpc/rtld-global-offsets.sym index f5ea5a1..6b348fd 100644 --- a/sysdeps/powerpc/rtld-global-offsets.sym +++ b/sysdeps/powerpc/rtld-global-offsets.sym @@ -6,3 +6,4 @@ RTLD_GLOBAL_RO_DL_HWCAP_OFFSET rtld_global_ro_offsetof (_dl_hwcap) RTLD_GLOBAL_RO_DL_HWCAP2_OFFSET rtld_global_ro_offsetof (_dl_hwcap2) +RTLD_GLOBAL_RO_DL_CACHE_LINE_SIZE_OFFSET rtld_global_ro_offsetof (_dl_cache_line_size) diff --git a/sysdeps/powerpc/tst-cache-ppc-static-dlopen.c b/sysdeps/powerpc/tst-cache-ppc-static-dlopen.c new file mode 100644 index 0000000..296d0f4 --- /dev/null +++ b/sysdeps/powerpc/tst-cache-ppc-static-dlopen.c @@ -0,0 +1,54 @@ +/* Test dl_cache_line_size from a dlopen'ed DSO from a static executable. + Copyright (C) 2020 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, see + <https://www.gnu.org/licenses/>. */ + +#include <dlfcn.h> +#include <stdio.h> +#include <errno.h> + +int test_cache(int *); + +static int +do_test (void) +{ + int ret; + void *handle; + int (*test_cache) (int *); + + handle = dlopen ("mod-cache-ppc.so", RTLD_LAZY | RTLD_LOCAL); + if (handle == NULL) + { + printf ("dlopen (mod-cache-ppc.so): %s\n", dlerror ()); + return 1; + } + + test_cache = dlsym (handle, "test_cache"); + if (test_cache == NULL) + { + printf ("dlsym (test_cache): %s\n", dlerror ()); + return 1; + } + + ret = test_cache(&errno); + + test_cache = NULL; + dlclose (handle); + + return ret; +} + +#include <support/test-driver.c> diff --git a/sysdeps/powerpc/tst-cache-ppc-static.c b/sysdeps/powerpc/tst-cache-ppc-static.c new file mode 100644 index 0000000..b0c417e --- /dev/null +++ b/sysdeps/powerpc/tst-cache-ppc-static.c @@ -0,0 +1,20 @@ +/* Test if an executable can read from _dl_cache_line_size. + Copyright (C) 2020 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, see + <https://www.gnu.org/licenses/>. */ + +#include "tst-cache-ppc.c" +#include "mod-cache-ppc.c" diff --git a/sysdeps/powerpc/tst-cache-ppc.c b/sysdeps/powerpc/tst-cache-ppc.c new file mode 100644 index 0000000..86c7117 --- /dev/null +++ b/sysdeps/powerpc/tst-cache-ppc.c @@ -0,0 +1,29 @@ +/* Test if an executable can read from rtld_global_ro._dl_cache_line_size. + Copyright (C) 2020 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, see + <https://www.gnu.org/licenses/>. */ + +#include <errno.h> + +int test_cache(int *); + +static int +do_test (void) +{ + return test_cache(&errno); +} + +#include <support/test-driver.c> diff --git a/sysdeps/unix/sysv/linux/powerpc/dl-sysdep.c b/sysdeps/unix/sysv/linux/powerpc/dl-auxv.h index 5d65bc6..be21897 100644 --- a/sysdeps/unix/sysv/linux/powerpc/dl-sysdep.c +++ b/sysdeps/unix/sysv/linux/powerpc/dl-auxv.h @@ -1,5 +1,5 @@ -/* Operating system support for run-time dynamic linker. Linux/PPC version. - Copyright (C) 1997-2020 Free Software Foundation, Inc. +/* Auxiliary vector processing. Linux/PPC version. + Copyright (C) 2020 Free Software Foundation, Inc. This file is part of the GNU C Library. The GNU C Library is free software; you can redistribute it and/or @@ -16,18 +16,15 @@ License along with the GNU C Library; if not, see <https://www.gnu.org/licenses/>. */ -#include <config.h> #include <ldsodefs.h> -int __cache_line_size attribute_hidden; +#if IS_IN (libc) && !defined SHARED +int GLRO(dl_cache_line_size); +#endif -/* Scan the Aux Vector for the "Data Cache Block Size" entry. If found - verify that the static extern __cache_line_size is defined by checking - for not NULL. If it is defined then assign the cache block size - value to __cache_line_size. */ +/* Scan the Aux Vector for the "Data Cache Block Size" entry and assign it + to dl_cache_line_size. */ #define DL_PLATFORM_AUXV \ case AT_DCACHEBSIZE: \ - __cache_line_size = av->a_un.a_val; \ + GLRO(dl_cache_line_size) = av->a_un.a_val; \ break; - -#include <sysdeps/unix/sysv/linux/dl-sysdep.c> diff --git a/sysdeps/unix/sysv/linux/powerpc/dl-static.c b/sysdeps/unix/sysv/linux/powerpc/dl-static.c index 59ce4e8..a77e07b 100644 --- a/sysdeps/unix/sysv/linux/powerpc/dl-static.c +++ b/sysdeps/unix/sysv/linux/powerpc/dl-static.c @@ -30,12 +30,14 @@ _dl_var_init (void *array[]) DL_AUXV = 1, DL_HWCAP = 2, DL_HWCAP2 = 3, + DL_CACHE_LINE_SIZE = 4 }; GLRO(dl_pagesize) = *((size_t *) array[DL_PAGESIZE]); GLRO(dl_auxv) = (ElfW(auxv_t) *) *((size_t *) array[DL_AUXV]); GLRO(dl_hwcap) = *((unsigned long int *) array[DL_HWCAP]); GLRO(dl_hwcap2) = *((unsigned long int *) array[DL_HWCAP2]); + GLRO(dl_cache_line_size) = (int) *((int *) array[DL_CACHE_LINE_SIZE]); } #else @@ -46,6 +48,7 @@ static void *variables[] = &GLRO(dl_auxv), &GLRO(dl_hwcap), &GLRO(dl_hwcap2), + &GLRO(dl_cache_line_size) }; static void diff --git a/sysdeps/unix/sysv/linux/powerpc/libc-start.c b/sysdeps/unix/sysv/linux/powerpc/libc-start.c index 93f8659..fc86d6e 100644 --- a/sysdeps/unix/sysv/linux/powerpc/libc-start.c +++ b/sysdeps/unix/sysv/linux/powerpc/libc-start.c @@ -24,7 +24,6 @@ #include <hwcapinfo.h> #endif -int __cache_line_size attribute_hidden; /* The main work is done in the generic function. */ #define LIBC_START_MAIN generic_start_main #define LIBC_START_DISABLE_INLINE @@ -71,15 +70,12 @@ __libc_start_main (int argc, char **argv, rtld_fini = NULL; } - /* Initialize the __cache_line_size variable from the aux vector. For the - static case, we also need _dl_hwcap, _dl_hwcap2 and _dl_platform, so we - can call __tcb_parse_hwcap_and_convert_at_platform (). */ for (ElfW (auxv_t) * av = auxvec; av->a_type != AT_NULL; ++av) switch (av->a_type) { - case AT_DCACHEBSIZE: - __cache_line_size = av->a_un.a_val; - break; + /* For the static case, we also need _dl_hwcap, _dl_hwcap2 and + _dl_platform, so we can call + __tcb_parse_hwcap_and_convert_at_platform (). */ #ifndef SHARED case AT_HWCAP: _dl_hwcap = (unsigned long int) av->a_un.a_val; |