AuroraMiddleware/glibc
1
0
Fork 0
mirror of https://sourceware.org/git/glibc.git synced 2024-11-15 09:30:06 +00:00
Code Issues Packages Projects Releases Wiki Activity
b994fd7937
glibc/sysdeps/unix/sysv/linux/mips
History
H.J. Lu fb1cf10811 Add INLINE_SYSCALL_ERROR_RETURN_VALUE 
For ia32 PIC, the first thing of many syscalls does is to call
__x86.get_pc_thunk.reg to load PC into reg in case there is an error,
which is required for setting errno.  In most cases, there are no
errors.  But we still call __x86.get_pc_thunk.reg.  This patch adds
INLINE_SYSCALL_ERROR_RETURN_VALUE so that i386 can optimize setting
errno by branching to the internal __syscall_error without PLT.

With i386 INLINE_SYSCALL_ERROR_RETURN_VALUE and i386 syscall inlining
optimization for GCC 5, for sysdeps/unix/sysv/linux/fchmodat.c with
-O2 -march=i686 -mtune=generic, GCC 5.2 now generates:

<fchmodat>:
   0:	push   %ebx
   1:	mov    0x14(%esp),%eax
   5:	mov    0x8(%esp),%ebx
   9:	mov    0xc(%esp),%ecx
   d:	mov    0x10(%esp),%edx
  11:	test   $0xfffffeff,%eax
  16:	jne    38 <fchmodat+0x38>
  18:	test   $0x1,%ah
  1b:	jne    48 <fchmodat+0x48>
  1d:	mov    $0x132,%eax
  22:	call   *%gs:0x10
  29:	cmp    $0xfffff000,%eax
  2e:	ja     58 <fchmodat+0x58>
  30:	pop    %ebx
  31:	ret
  32:	lea    0x0(%esi),%esi
  38:	pop    %ebx
  39:	mov    $0xffffffea,%eax
  3e:	jmp    3f <fchmodat+0x3f>	3f: R_386_PC32	__syscall_error
  43:	nop
  44:	lea    0x0(%esi,%eiz,1),%esi
  48:	pop    %ebx
  49:	mov    $0xffffffa1,%eax
  4e:	jmp    4f <fchmodat+0x4f>	4f: R_386_PC32	__syscall_error
  53:	nop
  54:	lea    0x0(%esi,%eiz,1),%esi
  58:	pop    %ebx
  59:	jmp    5a <fchmodat+0x5a>	5a: R_386_PC32	__syscall_error

instead of

<fchmodat>:
   0:	sub    $0x8,%esp
   3:	mov    0x18(%esp),%eax
   7:	mov    %ebx,(%esp)
   a:	call   b <fchmodat+0xb>	b: R_386_PC32	__x86.get_pc_thunk.bx
   f:	add    $0x2,%ebx	11: R_386_GOTPC	_GLOBAL_OFFSET_TABLE_
  15:	mov    %edi,0x4(%esp)
  19:	test   $0xfffffeff,%eax
  1e:	jne    70 <fchmodat+0x70>
  20:	test   $0x1,%ah
  23:	jne    88 <fchmodat+0x88>
  25:	mov    0x14(%esp),%edx
  29:	mov    0x10(%esp),%ecx
  2d:	mov    0xc(%esp),%edi
  31:	xchg   %ebx,%edi
  33:	mov    $0x132,%eax
  38:	call   *%gs:0x10
  3f:	xchg   %edi,%ebx
  41:	cmp    $0xfffff000,%eax
  46:	ja     58 <fchmodat+0x58>
  48:	mov    (%esp),%ebx
  4b:	mov    0x4(%esp),%edi
  4f:	add    $0x8,%esp
  52:	ret
  53:	nop
  54:	lea    0x0(%esi,%eiz,1),%esi
  58:	mov    0x0(%ebx),%edx	5a: R_386_TLS_GOTIE	__libc_errno
  5e:	neg    %eax
  60:	mov    %eax,%gs:(%edx)
  63:	mov    $0xffffffff,%eax
  68:	jmp    48 <fchmodat+0x48>
  6a:	lea    0x0(%esi),%esi
  70:	mov    0x0(%ebx),%eax	72: R_386_TLS_GOTIE	__libc_errno
  76:	movl   $0x16,%gs:(%eax)
  7d:	mov    $0xffffffff,%eax
  82:	jmp    48 <fchmodat+0x48>
  84:	lea    0x0(%esi,%eiz,1),%esi
  88:	mov    0x0(%ebx),%eax	8a: R_386_TLS_GOTIE	__libc_errno
  8e:	movl   $0x5f,%gs:(%eax)
  95:	mov    $0xffffffff,%eax
  9a:	jmp    48 <fchmodat+0x48>

	* sysdeps/unix/sysv/linux/sysdep.h: New file.
	* sysdeps/unix/sysv/linux/i386/sysdep.c: Likewise.
	* sysdeps/unix/sysv/linux/alpha/sysdep.h: Include
	<sysdeps/unix/sysv/linux/sysdep.h>.
	* sysdeps/unix/sysv/linux/arm/sysdep.h: Likewise.
	* sysdeps/unix/sysv/linux/generic/sysdep.h: Likewise.
	* sysdeps/unix/sysv/linux/hppa/sysdep.h: Likewise.
	* sysdeps/unix/sysv/linux/ia64/sysdep.h: Likewise.
	* sysdeps/unix/sysv/linux/m68k/sysdep.h: Likewise.
	* sysdeps/unix/sysv/linux/microblaze/sysdep.h: Likewise.
	* sysdeps/unix/sysv/linux/mips/mips32/sysdep.h: Likewise.
	* sysdeps/unix/sysv/linux/mips/mips64/n32/sysdep.h: Likewise.
	* sysdeps/unix/sysv/linux/mips/mips64/n64/sysdep.h: Likewise.
	* sysdeps/unix/sysv/linux/powerpc/powerpc32/sysdep.h: Likewise.
	* sysdeps/unix/sysv/linux/powerpc/powerpc64/sysdep.h: Likewise.
	* sysdeps/unix/sysv/linux/s390/s390-32/sysdep.h: Likewise.
	* sysdeps/unix/sysv/linux/s390/s390-64/sysdep.h: Likewise.
	* sysdeps/unix/sysv/linux/sh/sysdep.h: Likewise.
	* sysdeps/unix/sysv/linux/sparc/sysdep.h: Likewise.
	* sysdeps/unix/sysv/linux/x86_64/sysdep.h: Likewise.
	* sysdeps/unix/sysv/linux/i386/Makefile [$(subdir) == csu]
	(sysdep-dl-routines): Add sysdep.
	[$(subdir) == nptl] (libpthread-routines): Likewise.
	[$(subdir) == rt] (librt-routines): Likewise.
	* sysdeps/unix/sysv/linux/i386/clone.S (__clone): Don't check
	PIC when branching to SYSCALL_ERROR_LABEL.
	* sysdeps/unix/sysv/linux/i386/sysdep.S: Removed.
	* sysdeps/unix/sysv/linux/i386/sysdep.h: Include
	<sysdeps/unix/sysv/linux/sysdep.h>.
	(SYSCALL_ERROR_LABEL): Changed to __syscall_error.
	(SYSCALL_ERROR_ERRNO): Removed.
	(SYSCALL_ERROR_HANDLER): Changed to empty.
	(SYSCALL_ERROR_HANDLER_TLS_STORE): Likewise.
	(__syscall_error): New prototype.
	[IS_IN (libc)] (INLINE_SYSCALL): New macro.
	(INLINE_SYSCALL_ERROR_RETURN_VALUE): Likewise.
2015-10-13 11:59:15 -07:00
..
bits mips: siginfo.h: add SIGSYS details [BZ #18863] 2015-08-26 13:33:54 -04:00
mips32 Add INLINE_SYSCALL_ERROR_RETURN_VALUE 2015-10-13 11:59:15 -07:00
mips64 Add INLINE_SYSCALL_ERROR_RETURN_VALUE 2015-10-13 11:59:15 -07:00
sys Fix MIPS variable PAGE_SIZE bug (16191) 2015-01-05 13:45:16 +00:00
____longjmp_chk.c Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
_test_and_set.c Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
arch-fork.h Split arch-fork.h from fork.h 2014-05-16 11:17:41 -07:00
brk.c Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
clone.S Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
configure Add support for MIPS O32 FPXX and .MIPS.abiflags 2014-12-31 21:09:21 +00:00
configure.ac Add support for MIPS O32 FPXX and .MIPS.abiflags 2014-12-31 21:09:21 +00:00
dl-cache.h Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
dl-static.c Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
getcontext.S Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
getmsg.c Move mips from ports to libc. 2014-02-10 23:30:21 +00:00
getrlimit64.c Fix posix_spawn getrlimit64 namespace (bug 17991). 2015-02-18 00:26:35 +00:00
getsysstats.c Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
Implies NPTL is no longer an add-on! 2014-07-07 09:29:06 -07:00
ipc_priv.h Move mips from ports to libc. 2014-02-10 23:30:21 +00:00
kernel_rt_sigframe.h Move mips from ports to libc. 2014-02-10 23:30:21 +00:00
kernel_sigaction.h Move mips from ports to libc. 2014-02-10 23:30:21 +00:00
kernel_stat.h Move mips from ports to libc. 2014-02-10 23:30:21 +00:00
kernel_termios.h Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
kernel-features.h Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
ldsodefs.h Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
libc-abis Add support for MIPS O32 FPXX and .MIPS.abiflags 2014-12-31 21:09:21 +00:00
makecontext.S Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
Makefile Clean up sysdep-dl-routines variable. 2015-02-06 10:42:08 -08:00
pipe.S Move mips from ports to libc. 2014-02-10 23:30:21 +00:00
pread64.c nptl: Rewrite cancellation macros 2015-06-04 18:58:36 -03:00
pread.c nptl: Rewrite cancellation macros 2015-06-04 18:58:36 -03:00
profil-counter.h Move mips from ports to libc. 2014-02-10 23:30:21 +00:00
pt-vfork.S MIPS: Consolidate NPTL/non versions of vfork 2014-06-27 11:18:10 -07:00
putmsg.c Move mips from ports to libc. 2014-02-10 23:30:21 +00:00
pwrite64.c nptl: Rewrite cancellation macros 2015-06-04 18:58:36 -03:00
pwrite.c nptl: Rewrite cancellation macros 2015-06-04 18:58:36 -03:00
readelflib.c Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
register-dump.h Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
setcontext.S Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
setrlimit64.c Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
shlib-versions Remove configuration name patterns from shlib-versions. 2014-09-12 12:28:47 +00:00
sigaction.c Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
sigcontextinfo.h Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
swapcontext.S Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
syscalls.list Move mips from ports to libc. 2014-02-10 23:30:21 +00:00
sysdep-cancel.h Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
ucontext_i.sym Move mips from ports to libc. 2014-02-10 23:30:21 +00:00
ustat.c Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
Versions Move mips from ports to libc. 2014-02-10 23:30:21 +00:00
vfork.S Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
xstatconv.c Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00