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1d95b035c7
It's necessary to stub out __libc_disable_asynccancel and __libc_enable_asynccancel via rtld-stubbed-symbols because the new direct references to the unwinder result in symbol conflicts when the rtld exception handling from libc is linked in during the construction of librtld.map. unwind-forcedunwind.c is merged into unwind-resume.c. libc now needs the functions that were previously only used in libpthread. The GLIBC_PRIVATE exports of __libc_longjmp and __libc_siglongjmp are no longer needed, so switch them to hidden symbols. The symbol __pthread_unwind_next has been moved using scripts/move-symbol-to-libc.py. Reviewed-by: Adhemerva Zanella <adhemerval.zanella@linaro.org>
70 lines
2.2 KiB
C
70 lines
2.2 KiB
C
#ifndef _SETJMP_H
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#include <setjmp/setjmp.h>
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#ifndef _ISOMAC
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/* Now define the internal interfaces. */
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/* Internal machine-dependent function to restore context sans signal mask. */
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extern void __longjmp (__jmp_buf __env, int __val)
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__attribute__ ((__noreturn__)) attribute_hidden;
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extern void ____longjmp_chk (__jmp_buf __env, int __val)
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__attribute__ ((__noreturn__)) attribute_hidden;
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/* Internal function to possibly save the current mask of blocked signals
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in ENV, and always set the flag saying whether or not it was saved.
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This is used by the machine-dependent definition of `__sigsetjmp'.
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Always returns zero, for convenience. */
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extern int __sigjmp_save (jmp_buf __env, int __savemask);
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extern void _longjmp_unwind (jmp_buf env, int val);
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extern void __libc_siglongjmp (sigjmp_buf env, int val)
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__attribute__ ((noreturn)) attribute_hidden;
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extern void __libc_longjmp (sigjmp_buf env, int val)
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__attribute__ ((noreturn)) attribute_hidden;
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libc_hidden_proto (_setjmp)
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libc_hidden_proto (__sigsetjmp)
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# if IS_IN (rtld)
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extern __typeof (__sigsetjmp) __sigsetjmp attribute_hidden;
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# endif
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/* Check jmp_buf sizes, alignments and offsets. */
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# include <stddef.h>
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# include <jmp_buf-macros.h>
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# define SJSTR_HELPER(x) #x
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# define SJSTR(x) SJSTR_HELPER(x)
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# define TEST_SIZE(type, size) \
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_Static_assert (sizeof (type) == size, \
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"size of " #type " != " \
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SJSTR (size))
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# define TEST_ALIGN(type, align) \
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_Static_assert (__alignof__ (type) == align , \
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"align of " #type " != " \
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SJSTR (align))
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# define TEST_OFFSET(type, member, offset) \
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_Static_assert (offsetof (type, member) == offset, \
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"offset of " #member " field of " #type " != " \
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SJSTR (offset))
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/* Check if jmp_buf have the expected sizes. */
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TEST_SIZE (jmp_buf, JMP_BUF_SIZE);
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TEST_SIZE (sigjmp_buf, SIGJMP_BUF_SIZE);
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/* Check if jmp_buf have the expected alignments. */
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TEST_ALIGN (jmp_buf, JMP_BUF_ALIGN);
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TEST_ALIGN (sigjmp_buf, SIGJMP_BUF_ALIGN);
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/* Check if internal fields in jmp_buf have the expected offsets. */
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TEST_OFFSET (struct __jmp_buf_tag, __mask_was_saved,
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MASK_WAS_SAVED_OFFSET);
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TEST_OFFSET (struct __jmp_buf_tag, __saved_mask,
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SAVED_MASK_OFFSET);
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#endif
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#endif
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