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41f67ccbe9
This patch enables the option to influence hwcaps and stfle bits used by the s390 specific ifunc-resolvers. The currently x86-specific tunable glibc.cpu.hwcaps is also used on s390x to achieve the task. In addition the user can also set a CPU arch-level like z13 instead of single HWCAP and STFLE features. Note that the tunable only handles the features which are really used in the IFUNC-resolvers. All others are ignored as the values are only used inside glibc. Thus we can influence: - HWCAP_S390_VXRS (z13) - HWCAP_S390_VXRS_EXT (z14) - HWCAP_S390_VXRS_EXT2 (z15) - STFLE_MIE3 (z15) The influenced hwcap/stfle-bits are stored in the s390-specific cpu_features struct which also contains reserved fields for future usage. The ifunc-resolvers and users of stfle bits are adjusted to use the information from cpu_features struct. On 31bit, the ELF_MACHINE_IRELATIVE macro is now also defined. Otherwise the new ifunc-resolvers segfaults as they depend on the not yet processed_rtld_global_ro@GLIBC_PRIVATE relocation. |
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| .. | ||
| bits | ||
| __longjmp.c | ||
| add_n.S | ||
| addmul_1.S | ||
| bsd-_setjmp.S | ||
| bsd-setjmp.S | ||
| crti.S | ||
| crtn.S | ||
| dl-machine.h | ||
| dl-trampoline.h | ||
| dl-trampoline.S | ||
| Implies | ||
| Makefile | ||
| mul_1.S | ||
| s390-mcount.S | ||
| setjmp.S | ||
| stackguard-macros.h | ||
| start.S | ||
| strncpy-z900.S | ||
| sub_n.S | ||
| symbol-hacks.h | ||
| sysdep.h | ||
| tst-audit.h | ||
| Versions | ||