mirror of git://sourceware.org/git/glibc.git
e27f41ba2b
Add <bits/indirect-return.h> and include it in <ucontext.h>. __INDIRECT_RETURN defined in <bits/indirect-return.h> indicates if swapcontext requires special compiler treatment. The default __INDIRECT_RETURN is empty. On x86, when shadow stack is enabled, __INDIRECT_RETURN is defined with indirect_return attribute, which has been added to GCC 9, to indicate that swapcontext returns via indirect branch. Otherwise __INDIRECT_RETURN is defined with returns_twice attribute. When shadow stack is enabled, remove always_inline attribute from prepare_test_buffer in string/tst-xbzero-opt.c to avoid: tst-xbzero-opt.c: In function ‘prepare_test_buffer’: tst-xbzero-opt.c:105:1: error: function ‘prepare_test_buffer’ can never be inlined because it uses setjmp prepare_test_buffer (unsigned char *buf) when indirect_return attribute isn't available. Reviewed-by: Carlos O'Donell <carlos@redhat.com> * bits/indirect-return.h: New file. * misc/sys/cdefs.h (__glibc_has_attribute): New. * sysdeps/x86/bits/indirect-return.h: Likewise. * stdlib/Makefile (headers): Add bits/indirect-return.h. * stdlib/ucontext.h: Include <bits/indirect-return.h>. (swapcontext): Add __INDIRECT_RETURN. * string/tst-xbzero-opt.c (ALWAYS_INLINE): New. (prepare_test_buffer): Use it. |
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| .. | ||
| bits | ||
| sys | ||
| Makefile | ||
| Versions | ||
| acct.c | ||
| allocate_once.c | ||
| ar.h | ||
| brk.c | ||
| bug-hsearch1.c | ||
| bug18240.c | ||
| chflags.c | ||
| chroot.c | ||
| daemon.c | ||
| dirname.c | ||
| efgcvt.c | ||
| efgcvt_r.c | ||
| err.c | ||
| err.h | ||
| error.c | ||
| error.h | ||
| fchflags.c | ||
| fdatasync.c | ||
| fgetxattr.c | ||
| flistxattr.c | ||
| fremovexattr.c | ||
| fsetxattr.c | ||
| fstab.c | ||
| fstab.h | ||
| fsync.c | ||
| ftruncate.c | ||
| ftruncate64.c | ||
| futimes.c | ||
| futimesat.c | ||
| getauxval.c | ||
| getclktck.c | ||
| getdomain.c | ||
| getdtsz.c | ||
| gethostid.c | ||
| gethostname.c | ||
| getloadavg.c | ||
| getpagesize.c | ||
| getpass.c | ||
| getsysstats.c | ||
| getttyent.c | ||
| getusershell.c | ||
| getxattr.c | ||
| gtty.c | ||
| hsearch.c | ||
| hsearch_r.c | ||
| ifunc-impl-list.c | ||
| init-misc.c | ||
| insremque.c | ||
| ioctl.c | ||
| lgetxattr.c | ||
| libgen.h | ||
| listxattr.c | ||
| llistxattr.c | ||
| lremovexattr.c | ||
| lsearch.c | ||
| lsetxattr.c | ||
| lutimes.c | ||
| madvise.c | ||
| makedev.c | ||
| mincore.c | ||
| mkdtemp.c | ||
| mkostemp.c | ||
| mkostemp64.c | ||
| mkostemps.c | ||
| mkostemps64.c | ||
| mkstemp.c | ||
| mkstemp64.c | ||
| mkstemps.c | ||
| mkstemps64.c | ||
| mktemp.c | ||
| mlock.c | ||
| mlockall.c | ||
| mmap.c | ||
| mmap64.c | ||
| mntent.c | ||
| mntent.h | ||
| mntent_r.c | ||
| mprotect.c | ||
| msync.c | ||
| munlock.c | ||
| munlockall.c | ||
| munmap.c | ||
| preadv.c | ||
| preadv2.c | ||
| preadv64.c | ||
| preadv64v2.c | ||
| pselect.c | ||
| ptrace.c | ||
| pwritev.c | ||
| pwritev2.c | ||
| pwritev64.c | ||
| pwritev64v2.c | ||
| qefgcvt.c | ||
| qefgcvt_r.c | ||
| readv.c | ||
| reboot.c | ||
| regexp.c | ||
| regexp.h | ||
| remap_file_pages.c | ||
| removexattr.c | ||
| revoke.c | ||
| sbrk.c | ||
| search.h | ||
| select.c | ||
| setdomain.c | ||
| setegid.c | ||
| seteuid.c | ||
| sethostid.c | ||
| sethostname.c | ||
| setregid.c | ||
| setreuid.c | ||
| setxattr.c | ||
| sgtty.h | ||
| sstk.c | ||
| stab.h | ||
| stty.c | ||
| swapoff.c | ||
| swapon.c | ||
| sync.c | ||
| syncfs.c | ||
| syscall.c | ||
| syscall.h | ||
| sysexits.h | ||
| syslog.c | ||
| syslog.h | ||
| truncate.c | ||
| truncate64.c | ||
| tsearch.c | ||
| tst-allocate_once.c | ||
| tst-atomic-long.c | ||
| tst-atomic.c | ||
| tst-dirname.c | ||
| tst-efgcvt.c | ||
| tst-empty.c | ||
| tst-error1.c | ||
| tst-fdset.c | ||
| tst-hsearch.c | ||
| tst-insremque.c | ||
| tst-makedev.c | ||
| tst-mntent-blank-corrupt.c | ||
| tst-mntent-blank-passno.c | ||
| tst-mntent.c | ||
| tst-mntent2.c | ||
| tst-preadvwritev-common.c | ||
| tst-preadvwritev.c | ||
| tst-preadvwritev2-common.c | ||
| tst-preadvwritev2.c | ||
| tst-preadvwritev64.c | ||
| tst-preadvwritev64v2.c | ||
| tst-pselect.c | ||
| tst-tsearch.c | ||
| ttyent.h | ||
| ttyslot.c | ||
| ualarm.c | ||
| usleep.c | ||
| ustat.c | ||
| utimes.c | ||
| vhangup.c | ||
| writev.c | ||