mirror of
https://github.com/jart/cosmopolitan.git
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6ffed14b9c
Actually Portable Executable now supports Android. Cosmo's old mmap code required a 47 bit address space. The new implementation is very agnostic and supports both smaller address spaces (e.g. embedded) and even modern 56-bit PML5T paging for x86 which finally came true on Zen4 Threadripper Cosmopolitan no longer requires UNIX systems to observe the Windows 64kb granularity; i.e. sysconf(_SC_PAGE_SIZE) will now report the host native page size. This fixes a longstanding POSIX conformance issue, concerning file mappings that overlap the end of file. Other aspects of conformance have been improved too, such as the subtleties of address assignment and and the various subtleties surrounding MAP_FIXED and MAP_FIXED_NOREPLACE On Windows, mappings larger than 100 megabytes won't be broken down into thousands of independent 64kb mappings. Support for MAP_STACK is removed by this change; please use NewCosmoStack() instead. Stack overflow avoidance is now being implemented using the POSIX thread APIs. Please use GetStackBottom() and GetStackAddr(), instead of the old error-prone GetStackAddr() and HaveStackMemory() APIs which are removed.
90 lines
2.6 KiB
C
90 lines
2.6 KiB
C
#ifndef COSMOPOLITAN_LIBC_THREAD_TLS_H_
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#define COSMOPOLITAN_LIBC_THREAD_TLS_H_
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#define TLS_ALIGNMENT 64
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#define TIB_FLAG_VFORKED 1
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#define TIB_FLAG_MAPLOCK 2
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#if !(__ASSEMBLER__ + __LINKER__ + 0)
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COSMOPOLITAN_C_START_
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struct CosmoFtrace { /* 16 */
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char ft_once; /* 0 */
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char ft_noreentry; /* 1 */
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int ft_skew; /* 4 */
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int64_t ft_lastaddr; /* 8 */
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};
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/* cosmopolitan thread information block (512 bytes) */
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/* NOTE: update aarch64 libc/errno.h if sizeof changes */
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/* NOTE: update aarch64 libc/proc/vfork.S if sizeof changes */
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/* NOTE: update aarch64 libc/nexgen32e/gc.S if sizeof changes */
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struct CosmoTib {
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struct CosmoTib *tib_self; /* 0x00 */
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struct CosmoFtrace tib_ftracer; /* 0x08 */
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void *tib_garbages; /* 0x18 */
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intptr_t tib_locale; /* 0x20 */
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intptr_t tib_pthread; /* 0x28 */
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struct CosmoTib *tib_self2; /* 0x30 */
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_Atomic(int32_t) tib_tid; /* 0x38 transitions -1 → tid → 0 */
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int32_t tib_errno; /* 0x3c */
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uint64_t tib_flags; /* 0x40 */
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int tib_ftrace; /* inherited */
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int tib_strace; /* inherited */
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_Atomic(uint64_t) tib_sigmask; /* inherited */
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_Atomic(uint64_t) tib_sigpending;
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_Atomic(uint64_t) tib_syshand; /* win32=kThread, xnusilicon=pthread_t */
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char *tib_sigstack_addr;
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uint32_t tib_sigstack_size;
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uint32_t tib_sigstack_flags;
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void *tib_nsync;
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void *tib_keys[48];
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} __attribute__((__aligned__(64)));
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extern int __threaded;
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extern char __tls_morphed;
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extern unsigned __tls_index;
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char *_mktls(struct CosmoTib **) libcesque;
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void __bootstrap_tls(struct CosmoTib *, char *) libcesque;
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#ifdef __x86_64__
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extern char __tls_enabled;
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#define __tls_enabled_set(x) __tls_enabled = x
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#elif defined(__aarch64__)
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#define __tls_enabled true
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#define __tls_enabled_set(x) (void)0
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#else
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#error "unsupported architecture"
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#endif
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void __set_tls(struct CosmoTib *) libcesque;
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/**
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* Returns location of thread information block.
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*
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* This can't be used in privileged functions.
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*/
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forceinline pureconst struct CosmoTib *__get_tls(void) {
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#ifdef __chibicc__
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return 0;
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#elif __x86_64__
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struct CosmoTib *__tib;
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__asm__("mov\t%%gs:0x30,%0" : "=r"(__tib));
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return __tib;
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#elif defined(__aarch64__)
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register struct CosmoTib *__tls __asm__("x28");
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return __tls - 1;
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#endif
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}
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#ifdef __x86_64__
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#define __adj_tls(tib) (tib)
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#elif defined(__aarch64__)
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#define __adj_tls(tib) ((struct CosmoTib *)(tib) + 1)
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#endif
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COSMOPOLITAN_C_END_
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#endif /* !(__ASSEMBLER__ + __LINKER__ + 0) */
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#endif /* COSMOPOLITAN_LIBC_THREAD_TLS_H_ */
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