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fd840f0dfe
I booted my M1 Mac into macOS rather than Asahi for the first time in a while, and discovered that an OS update seems to have added some sysctl flags indicating the presence of the CPU extensions that I previously knew of no way to check for! Added them checks to arm_arch_queries.c, though I've also retained backwards compat with the previous OS version which didn't have them at all.
70 lines
1.8 KiB
C
70 lines
1.8 KiB
C
/*
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* Header included only by arm_arch_queries.c.
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*
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* The only reason this is a header file instead of a source file is
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* so that I can define 'static inline' functions which may or may not
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* be used, without provoking a compiler warning when I turn out not
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* to use them in the subsequent source file.
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*/
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#ifndef PUTTY_ARM_ARCH_QUERIES_H
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#define PUTTY_ARM_ARCH_QUERIES_H
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#if defined __APPLE__
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#if HAVE_SYS_SYSCTL_H
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#include <sys/sysctl.h>
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#endif
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#endif /* defined __APPLE__ */
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#if defined __arm__ || defined __aarch64__
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#if HAVE_SYS_TYPES_H
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#include <sys/types.h>
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#endif
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#if HAVE_SYS_AUXV_H
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#include <sys/auxv.h>
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#endif
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#if HAVE_ASM_HWCAP_H
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#include <asm/hwcap.h>
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#endif
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#if HAVE_GETAUXVAL
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/* No code needed: getauxval has just the API we want already */
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#elif HAVE_ELF_AUX_INFO
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/* Implement the simple getauxval API in terms of FreeBSD elf_aux_info */
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static inline u_long getauxval(int which)
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{
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u_long toret;
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if (elf_aux_info(which, &toret, sizeof(toret)) != 0)
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return 0; /* elf_aux_info didn't work */
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return toret;
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}
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#else
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/* Implement a stub getauxval which returns no capabilities */
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static inline u_long getauxval(int which) { return 0; }
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#endif
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#endif /* defined __arm__ || defined __aarch64__ */
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#if defined __APPLE__
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typedef enum { SYSCTL_MISSING, SYSCTL_OFF, SYSCTL_ON } SysctlResult;
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static inline SysctlResult test_sysctl_flag(const char *flagname)
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{
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#if HAVE_SYSCTLBYNAME
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int value;
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size_t size = sizeof(value);
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if (sysctlbyname(flagname, &value, &size, NULL, 0) == 0 &&
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size == sizeof(value)) {
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return value != 0 ? SYSCTL_ON : SYSCTL_OFF;
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}
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#else /* HAVE_SYSCTLBYNAME */
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return SYSCTL_MISSING;
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#endif /* HAVE_SYSCTLBYNAME */
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}
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#endif /* defined __APPLE__ */
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#endif /* PUTTY_ARM_ARCH_QUERIES_H */
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