1998-09-07 07:45:24 +08:00
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#ifndef _SETJMP_H
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1995-02-18 09:27:10 +08:00
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#include <setjmp/setjmp.h>
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1998-08-10 01:39:48 +08:00
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2012-02-26 12:18:39 +08:00
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#ifndef _ISOMAC
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1998-08-10 01:39:48 +08:00
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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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1999-11-24 01:31:31 +08:00
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extern void __longjmp (__jmp_buf __env, int __val)
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2015-10-16 05:22:10 +08:00
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__attribute__ ((__noreturn__)) attribute_hidden;
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1998-08-10 01:39:48 +08:00
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2017-08-20 21:30:29 +08:00
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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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1998-08-10 01:39:48 +08:00
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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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1999-11-24 01:31:31 +08:00
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extern int __sigjmp_save (jmp_buf __env, int __savemask);
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2000-12-06 01:34:28 +08:00
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extern void _longjmp_unwind (jmp_buf env, int val);
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2002-08-21 16:08:03 +08:00
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extern void __libc_siglongjmp (sigjmp_buf env, int val)
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2012-02-26 12:18:39 +08:00
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__attribute__ ((noreturn));
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2002-08-21 16:08:03 +08:00
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extern void __libc_longjmp (sigjmp_buf env, int val)
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__attribute__ ((noreturn));
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2000-12-28 04:25:30 +08:00
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2002-12-31 17:36:52 +08:00
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libc_hidden_proto (_setjmp)
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2003-09-01 02:10:47 +08:00
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libc_hidden_proto (__sigsetjmp)
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2015-10-16 05:22:10 +08:00
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Introduce NO_RTLD_HIDDEN, make hurd use it instead of NO_HIDDEN
On the Hurd, the rtld needs to see its own dumb versions of a few functions
(defined in sysdeps/mach/hurd/dl-sysdep.c) overridden by libc's versions once
loaded. rtld should thus not have hidden attribute for these. To achieve this,
the Hurd port used to just define NO_HIDDEN, which disables it completely. For
now, this changes that to disabling it for all rtld functions, for simplicity.
See Roland's comment on https://sourceware.org/bugzilla/show_bug.cgi?id=15605#c5
The ld.so numbers remain at
8 .rel.plt 000000c8 00000c24 00000c24 00000c24 2**2
CONTENTS, ALLOC, LOAD, READONLY, DATA
9 .plt 000001a0 00000cf0 00000cf0 00000cf0 2**4
CONTENTS, ALLOC, LOAD, READONLY, CODE
10 .plt.got 00000010 00000e90 00000e90 00000e90 2**3
CONTENTS, ALLOC, LOAD, READONLY, CODE
18 .got.plt 00000070 0002d000 0002d000 0002c000 2**2
CONTENTS, ALLOC, LOAD, DATA
which is about 3 times as much as on Linux.
The libc.so numbers get divided by 3 (the remainings are mostly RPC stub calls)
* include/libc-symbols.h [NO_RTLD_HIDDEN] (rtld_hidden_proto,
rtld_hidden_tls_proto, rtld_hidden_def, rtld_hidden_weak,
rtld_hidden_rtld_hidden_ver, data_def, rtld_hidden_data_weak,
rtld_hidden_data_ver): Define to empty.
* include/assert.h [IS_IN(rtld) && NO_RTLD_HIDDEN] (__assert_fail,
__assert_perror_fail): Likewise.
* include/dirent.h [IS_IN(rtld) && NO_RTLD_HIDDEN]
(__rewinddir): Likewise.
* include/libc-internal.h [IS_IN(rtld) && NO_RTLD_HIDDEN]
(__profile_frequency): Likewise.
* include/setjmp.h (__sigsetjmp): Likewise.
* include/signal.h [IS_IN(rtld) && NO_RTLD_HIDDEN] (__sigaction,
__libc_sigaction): Likewise.
* include/stdlib.h [NO_RTLD_HIDDEN] (unsetenv, __strtoul_internal): Do
not set hidden attribute.
* include/string.h [IS_IN(rtld) && NO_RTLD_HIDDEN] (__stpcpy, __strdup,
__strerror_t, __strsep_g, memchr, memcmp, memcpy, memmove, memset,
rawmemchr, stpcpy, strchr, strcmp, strlen, strnlen, strsep): Likewise.
* include/sys/stat.h [IS_IN(rtld) && NO_RTLD_HIDDEN] (__fxstat,
__fxstat64, __lxstat, __lxstat64, __xstat, __xstat64,
__fxstatat64): Likewise.
* include/sys/utsname.h [IS_IN(rtld) && NO_RTLD_HIDDEN]
(__uname): Likewise.
* include/sysdeps/generic/_itoa.h [IS_IN(rtld) && NO_RTLD_HIDDEN]
(_itoa_upper_digits, _itoa_lower_digits): Likewise.
* sysdeps/mach/hurd/configure.ac (NO_HIDDEN): Do not set.
(NO_RTLD_HIDDEN): Set.
* sysdeps/mach/hurd/configure: Refresh.
* config.h.in: Refresh.
2017-10-03 07:26:58 +08:00
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# if IS_IN (rtld) && !defined NO_RTLD_HIDDEN
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2015-10-16 05:22:10 +08:00
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extern __typeof (__sigsetjmp) __sigsetjmp attribute_hidden;
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# endif
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2017-11-09 21:09:49 +08:00
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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 STR_HELPER(x) #x
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# define STR(x) STR_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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STR (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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STR (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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STR (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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2012-02-26 12:18:39 +08:00
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#endif
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2002-12-31 17:36:52 +08:00
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1998-09-07 07:45:24 +08:00
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#endif
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