2003-03-17 11:22:52 +00:00
|
|
|
/* Cancellable system call stubs. Linux/PowerPC64 version.
|
2016-01-04 16:05:18 +00:00
|
|
|
Copyright (C) 2003-2016 Free Software Foundation, Inc.
|
2003-03-17 11:22:52 +00:00
|
|
|
This file is part of the GNU C Library.
|
|
|
|
|
Contributed by Franz Sirl <Franz.Sirl-kernel@lauterbach.com>, 2003.
|
|
|
|
|
|
|
|
|
|
The GNU C Library is free software; you can redistribute it and/or
|
|
|
|
|
modify it under the terms of the GNU Lesser General Public
|
|
|
|
|
License as published by the Free Software Foundation; either
|
|
|
|
|
version 2.1 of the License, or (at your option) any later version.
|
|
|
|
|
|
|
|
|
|
The GNU C Library is distributed in the hope that it will be useful,
|
|
|
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
|
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
|
|
|
Lesser General Public License for more details.
|
|
|
|
|
|
|
|
|
|
You should have received a copy of the GNU Lesser General Public
|
2012-02-09 23:18:22 +00:00
|
|
|
License along with the GNU C Library; if not, see
|
|
|
|
|
<http://www.gnu.org/licenses/>. */
|
2003-03-17 11:22:52 +00:00
|
|
|
|
|
|
|
|
#include <sysdep.h>
|
|
|
|
|
#include <tls.h>
|
|
|
|
|
#ifndef __ASSEMBLER__
|
|
|
|
|
# include <nptl/pthreadP.h>
|
|
|
|
|
#endif
|
|
|
|
|
|
2014-11-24 09:33:45 +00:00
|
|
|
#if IS_IN (libc) || IS_IN (libpthread) || IS_IN (librt)
|
2003-03-17 11:22:52 +00:00
|
|
|
|
2015-02-03 12:41:25 +00:00
|
|
|
# define DASHDASHPFX(str) __##str
|
Update.
2004-09-07 Jakub Jelinek <jakub@redhat.com>
* sysdeps/powerpc/powerpc64/configure.in: New file.
* config.h.in (USE_PPC64_OVERLAPPING_OPD): Add.
* configure.in (HAVE_ASM_GLOBAL_DOT_NAME): Remove.
* sysdeps/powerpc/powerpc64/sysdep.h: Formatting.
(OPD_ENT, BODY_LABEL, ENTRY_1, ENTRY_2, END_2, DOT_PREFIX,
BODY_PREFIX): Define.
(ENTRY, DOT_LABEL, END, TRACEBACK, END_GEN_TB, EALIGN): Support
HAVE_ASM_GLOBAL_DOT_NAME or no dot symbols,
USE_PPC64_OVERLAPPING_OPD or never overlapping .opd entries.
* sysdeps/powerpc/powerpc64/dl-machine.h: Include sysdep.h.
(TRAMPOLINE_TEMPLATE, RTLD_START): Use the new sysdep.h macros.
2004-09-08 07:02:28 +00:00
|
|
|
|
PowerPC64 ELFv2 ABI 4/6: Stack frame layout changes
This updates glibc for the changes in the ELFv2 relating to the
stack frame layout. These are described in more detail here:
http://gcc.gnu.org/ml/gcc-patches/2013-11/msg01149.html
http://gcc.gnu.org/ml/gcc-patches/2013-11/msg01146.html
Specifically, the "compiler and linker doublewords" were removed,
which has the effect that the save slot for the TOC register is
now at offset 24 rather than 40 to the stack pointer.
In addition, a function may now no longer necessarily assume that
its caller has set up a 64-byte register save area its use.
To address the first change, the patch goes through all assembler
files and replaces immediate offsets in instructions accessing the
ABI-defined stack slots by symbolic offsets. Those already were
defined in ucontext_i.sym and used in some of the context routines,
but that doesn't really seem like the right place for those defines.
The patch instead defines those symbolic offsets in sysdeps.h,
in two variants for the old and new ABI, and uses them systematically
in all assembler files, not just the context routines.
The second change only affected a few assembler files that used
the save area to temporarily store some registers. In those
cases where this happens within a leaf function, this patch
changes the code to store those registers to the "red zone"
below the stack pointer. Otherwise, the functions already allocate
a stack frame, and the patch changes them to add extra space in
these frames as temporary space for the ELFv2 ABI.
2013-12-04 12:55:03 +00:00
|
|
|
#if _CALL_ELF == 2
|
|
|
|
|
#define CANCEL_FRAMESIZE (FRAME_MIN_SIZE+16+48)
|
|
|
|
|
#define CANCEL_PARM_SAVE (FRAME_MIN_SIZE+16)
|
|
|
|
|
#else
|
|
|
|
|
#define CANCEL_FRAMESIZE (FRAME_MIN_SIZE+16)
|
|
|
|
|
#define CANCEL_PARM_SAVE (CANCEL_FRAMESIZE+FRAME_PARM_SAVE)
|
|
|
|
|
#endif
|
|
|
|
|
|
2003-03-17 11:22:52 +00:00
|
|
|
# undef PSEUDO
|
|
|
|
|
# define PSEUDO(name, syscall_name, args) \
|
|
|
|
|
.section ".text"; \
|
|
|
|
|
ENTRY (name) \
|
|
|
|
|
SINGLE_THREAD_P; \
|
|
|
|
|
bne- .Lpseudo_cancel; \
|
Update.
2004-09-07 Jakub Jelinek <jakub@redhat.com>
* sysdeps/powerpc/powerpc64/configure.in: New file.
* config.h.in (USE_PPC64_OVERLAPPING_OPD): Add.
* configure.in (HAVE_ASM_GLOBAL_DOT_NAME): Remove.
* sysdeps/powerpc/powerpc64/sysdep.h: Formatting.
(OPD_ENT, BODY_LABEL, ENTRY_1, ENTRY_2, END_2, DOT_PREFIX,
BODY_PREFIX): Define.
(ENTRY, DOT_LABEL, END, TRACEBACK, END_GEN_TB, EALIGN): Support
HAVE_ASM_GLOBAL_DOT_NAME or no dot symbols,
USE_PPC64_OVERLAPPING_OPD or never overlapping .opd entries.
* sysdeps/powerpc/powerpc64/dl-machine.h: Include sysdep.h.
(TRAMPOLINE_TEMPLATE, RTLD_START): Use the new sysdep.h macros.
2004-09-08 07:02:28 +00:00
|
|
|
.type DASHDASHPFX(syscall_name##_nocancel),@function; \
|
|
|
|
|
.globl DASHDASHPFX(syscall_name##_nocancel); \
|
|
|
|
|
DASHDASHPFX(syscall_name##_nocancel): \
|
2003-03-17 11:22:52 +00:00
|
|
|
DO_CALL (SYS_ify (syscall_name)); \
|
|
|
|
|
PSEUDO_RET; \
|
Update.
2004-09-07 Jakub Jelinek <jakub@redhat.com>
* sysdeps/powerpc/powerpc64/configure.in: New file.
* config.h.in (USE_PPC64_OVERLAPPING_OPD): Add.
* configure.in (HAVE_ASM_GLOBAL_DOT_NAME): Remove.
* sysdeps/powerpc/powerpc64/sysdep.h: Formatting.
(OPD_ENT, BODY_LABEL, ENTRY_1, ENTRY_2, END_2, DOT_PREFIX,
BODY_PREFIX): Define.
(ENTRY, DOT_LABEL, END, TRACEBACK, END_GEN_TB, EALIGN): Support
HAVE_ASM_GLOBAL_DOT_NAME or no dot symbols,
USE_PPC64_OVERLAPPING_OPD or never overlapping .opd entries.
* sysdeps/powerpc/powerpc64/dl-machine.h: Include sysdep.h.
(TRAMPOLINE_TEMPLATE, RTLD_START): Use the new sysdep.h macros.
2004-09-08 07:02:28 +00:00
|
|
|
.size DASHDASHPFX(syscall_name##_nocancel),.-DASHDASHPFX(syscall_name##_nocancel); \
|
2003-03-17 11:22:52 +00:00
|
|
|
.Lpseudo_cancel: \
|
PowerPC64 ELFv2 ABI 4/6: Stack frame layout changes
This updates glibc for the changes in the ELFv2 relating to the
stack frame layout. These are described in more detail here:
http://gcc.gnu.org/ml/gcc-patches/2013-11/msg01149.html
http://gcc.gnu.org/ml/gcc-patches/2013-11/msg01146.html
Specifically, the "compiler and linker doublewords" were removed,
which has the effect that the save slot for the TOC register is
now at offset 24 rather than 40 to the stack pointer.
In addition, a function may now no longer necessarily assume that
its caller has set up a 64-byte register save area its use.
To address the first change, the patch goes through all assembler
files and replaces immediate offsets in instructions accessing the
ABI-defined stack slots by symbolic offsets. Those already were
defined in ucontext_i.sym and used in some of the context routines,
but that doesn't really seem like the right place for those defines.
The patch instead defines those symbolic offsets in sysdeps.h,
in two variants for the old and new ABI, and uses them systematically
in all assembler files, not just the context routines.
The second change only affected a few assembler files that used
the save area to temporarily store some registers. In those
cases where this happens within a leaf function, this patch
changes the code to store those registers to the "red zone"
below the stack pointer. Otherwise, the functions already allocate
a stack frame, and the patch changes them to add extra space in
these frames as temporary space for the ELFv2 ABI.
2013-12-04 12:55:03 +00:00
|
|
|
stdu 1,-CANCEL_FRAMESIZE(1); \
|
|
|
|
|
cfi_adjust_cfa_offset (CANCEL_FRAMESIZE); \
|
2003-03-17 11:22:52 +00:00
|
|
|
mflr 9; \
|
PowerPC64 ELFv2 ABI 4/6: Stack frame layout changes
This updates glibc for the changes in the ELFv2 relating to the
stack frame layout. These are described in more detail here:
http://gcc.gnu.org/ml/gcc-patches/2013-11/msg01149.html
http://gcc.gnu.org/ml/gcc-patches/2013-11/msg01146.html
Specifically, the "compiler and linker doublewords" were removed,
which has the effect that the save slot for the TOC register is
now at offset 24 rather than 40 to the stack pointer.
In addition, a function may now no longer necessarily assume that
its caller has set up a 64-byte register save area its use.
To address the first change, the patch goes through all assembler
files and replaces immediate offsets in instructions accessing the
ABI-defined stack slots by symbolic offsets. Those already were
defined in ucontext_i.sym and used in some of the context routines,
but that doesn't really seem like the right place for those defines.
The patch instead defines those symbolic offsets in sysdeps.h,
in two variants for the old and new ABI, and uses them systematically
in all assembler files, not just the context routines.
The second change only affected a few assembler files that used
the save area to temporarily store some registers. In those
cases where this happens within a leaf function, this patch
changes the code to store those registers to the "red zone"
below the stack pointer. Otherwise, the functions already allocate
a stack frame, and the patch changes them to add extra space in
these frames as temporary space for the ELFv2 ABI.
2013-12-04 12:55:03 +00:00
|
|
|
std 9,CANCEL_FRAMESIZE+FRAME_LR_SAVE(1); \
|
|
|
|
|
cfi_offset (lr, FRAME_LR_SAVE); \
|
2003-03-17 11:22:52 +00:00
|
|
|
DOCARGS_##args; /* save syscall args around CENABLE. */ \
|
|
|
|
|
CENABLE; \
|
PowerPC64 ELFv2 ABI 4/6: Stack frame layout changes
This updates glibc for the changes in the ELFv2 relating to the
stack frame layout. These are described in more detail here:
http://gcc.gnu.org/ml/gcc-patches/2013-11/msg01149.html
http://gcc.gnu.org/ml/gcc-patches/2013-11/msg01146.html
Specifically, the "compiler and linker doublewords" were removed,
which has the effect that the save slot for the TOC register is
now at offset 24 rather than 40 to the stack pointer.
In addition, a function may now no longer necessarily assume that
its caller has set up a 64-byte register save area its use.
To address the first change, the patch goes through all assembler
files and replaces immediate offsets in instructions accessing the
ABI-defined stack slots by symbolic offsets. Those already were
defined in ucontext_i.sym and used in some of the context routines,
but that doesn't really seem like the right place for those defines.
The patch instead defines those symbolic offsets in sysdeps.h,
in two variants for the old and new ABI, and uses them systematically
in all assembler files, not just the context routines.
The second change only affected a few assembler files that used
the save area to temporarily store some registers. In those
cases where this happens within a leaf function, this patch
changes the code to store those registers to the "red zone"
below the stack pointer. Otherwise, the functions already allocate
a stack frame, and the patch changes them to add extra space in
these frames as temporary space for the ELFv2 ABI.
2013-12-04 12:55:03 +00:00
|
|
|
std 3,FRAME_MIN_SIZE(1); /* store CENABLE return value (MASK). */ \
|
2003-03-17 11:22:52 +00:00
|
|
|
UNDOCARGS_##args; /* restore syscall args. */ \
|
|
|
|
|
DO_CALL (SYS_ify (syscall_name)); \
|
|
|
|
|
mfcr 0; /* save CR/R3 around CDISABLE. */ \
|
PowerPC64 ELFv2 ABI 4/6: Stack frame layout changes
This updates glibc for the changes in the ELFv2 relating to the
stack frame layout. These are described in more detail here:
http://gcc.gnu.org/ml/gcc-patches/2013-11/msg01149.html
http://gcc.gnu.org/ml/gcc-patches/2013-11/msg01146.html
Specifically, the "compiler and linker doublewords" were removed,
which has the effect that the save slot for the TOC register is
now at offset 24 rather than 40 to the stack pointer.
In addition, a function may now no longer necessarily assume that
its caller has set up a 64-byte register save area its use.
To address the first change, the patch goes through all assembler
files and replaces immediate offsets in instructions accessing the
ABI-defined stack slots by symbolic offsets. Those already were
defined in ucontext_i.sym and used in some of the context routines,
but that doesn't really seem like the right place for those defines.
The patch instead defines those symbolic offsets in sysdeps.h,
in two variants for the old and new ABI, and uses them systematically
in all assembler files, not just the context routines.
The second change only affected a few assembler files that used
the save area to temporarily store some registers. In those
cases where this happens within a leaf function, this patch
changes the code to store those registers to the "red zone"
below the stack pointer. Otherwise, the functions already allocate
a stack frame, and the patch changes them to add extra space in
these frames as temporary space for the ELFv2 ABI.
2013-12-04 12:55:03 +00:00
|
|
|
std 3,FRAME_MIN_SIZE+8(1); \
|
|
|
|
|
std 0,CANCEL_FRAMESIZE+FRAME_CR_SAVE(1); \
|
|
|
|
|
cfi_offset (cr, FRAME_CR_SAVE); \
|
|
|
|
|
ld 3,FRAME_MIN_SIZE(1); /* pass MASK to CDISABLE. */ \
|
2003-03-17 11:22:52 +00:00
|
|
|
CDISABLE; \
|
PowerPC64 ELFv2 ABI 4/6: Stack frame layout changes
This updates glibc for the changes in the ELFv2 relating to the
stack frame layout. These are described in more detail here:
http://gcc.gnu.org/ml/gcc-patches/2013-11/msg01149.html
http://gcc.gnu.org/ml/gcc-patches/2013-11/msg01146.html
Specifically, the "compiler and linker doublewords" were removed,
which has the effect that the save slot for the TOC register is
now at offset 24 rather than 40 to the stack pointer.
In addition, a function may now no longer necessarily assume that
its caller has set up a 64-byte register save area its use.
To address the first change, the patch goes through all assembler
files and replaces immediate offsets in instructions accessing the
ABI-defined stack slots by symbolic offsets. Those already were
defined in ucontext_i.sym and used in some of the context routines,
but that doesn't really seem like the right place for those defines.
The patch instead defines those symbolic offsets in sysdeps.h,
in two variants for the old and new ABI, and uses them systematically
in all assembler files, not just the context routines.
The second change only affected a few assembler files that used
the save area to temporarily store some registers. In those
cases where this happens within a leaf function, this patch
changes the code to store those registers to the "red zone"
below the stack pointer. Otherwise, the functions already allocate
a stack frame, and the patch changes them to add extra space in
these frames as temporary space for the ELFv2 ABI.
2013-12-04 12:55:03 +00:00
|
|
|
ld 9,CANCEL_FRAMESIZE+FRAME_LR_SAVE(1); \
|
|
|
|
|
ld 0,CANCEL_FRAMESIZE+FRAME_CR_SAVE(1); /* restore CR/R3. */ \
|
|
|
|
|
ld 3,FRAME_MIN_SIZE+8(1); \
|
2003-03-17 11:22:52 +00:00
|
|
|
mtlr 9; \
|
|
|
|
|
mtcr 0; \
|
PowerPC64 ELFv2 ABI 4/6: Stack frame layout changes
This updates glibc for the changes in the ELFv2 relating to the
stack frame layout. These are described in more detail here:
http://gcc.gnu.org/ml/gcc-patches/2013-11/msg01149.html
http://gcc.gnu.org/ml/gcc-patches/2013-11/msg01146.html
Specifically, the "compiler and linker doublewords" were removed,
which has the effect that the save slot for the TOC register is
now at offset 24 rather than 40 to the stack pointer.
In addition, a function may now no longer necessarily assume that
its caller has set up a 64-byte register save area its use.
To address the first change, the patch goes through all assembler
files and replaces immediate offsets in instructions accessing the
ABI-defined stack slots by symbolic offsets. Those already were
defined in ucontext_i.sym and used in some of the context routines,
but that doesn't really seem like the right place for those defines.
The patch instead defines those symbolic offsets in sysdeps.h,
in two variants for the old and new ABI, and uses them systematically
in all assembler files, not just the context routines.
The second change only affected a few assembler files that used
the save area to temporarily store some registers. In those
cases where this happens within a leaf function, this patch
changes the code to store those registers to the "red zone"
below the stack pointer. Otherwise, the functions already allocate
a stack frame, and the patch changes them to add extra space in
these frames as temporary space for the ELFv2 ABI.
2013-12-04 12:55:03 +00:00
|
|
|
addi 1,1,CANCEL_FRAMESIZE; \
|
|
|
|
|
cfi_adjust_cfa_offset (-CANCEL_FRAMESIZE); \
|
2010-08-12 16:19:19 +00:00
|
|
|
cfi_restore (lr); \
|
|
|
|
|
cfi_restore (cr)
|
2003-03-17 11:22:52 +00:00
|
|
|
|
|
|
|
|
# define DOCARGS_0
|
|
|
|
|
# define UNDOCARGS_0
|
|
|
|
|
|
PowerPC64 ELFv2 ABI 4/6: Stack frame layout changes
This updates glibc for the changes in the ELFv2 relating to the
stack frame layout. These are described in more detail here:
http://gcc.gnu.org/ml/gcc-patches/2013-11/msg01149.html
http://gcc.gnu.org/ml/gcc-patches/2013-11/msg01146.html
Specifically, the "compiler and linker doublewords" were removed,
which has the effect that the save slot for the TOC register is
now at offset 24 rather than 40 to the stack pointer.
In addition, a function may now no longer necessarily assume that
its caller has set up a 64-byte register save area its use.
To address the first change, the patch goes through all assembler
files and replaces immediate offsets in instructions accessing the
ABI-defined stack slots by symbolic offsets. Those already were
defined in ucontext_i.sym and used in some of the context routines,
but that doesn't really seem like the right place for those defines.
The patch instead defines those symbolic offsets in sysdeps.h,
in two variants for the old and new ABI, and uses them systematically
in all assembler files, not just the context routines.
The second change only affected a few assembler files that used
the save area to temporarily store some registers. In those
cases where this happens within a leaf function, this patch
changes the code to store those registers to the "red zone"
below the stack pointer. Otherwise, the functions already allocate
a stack frame, and the patch changes them to add extra space in
these frames as temporary space for the ELFv2 ABI.
2013-12-04 12:55:03 +00:00
|
|
|
# define DOCARGS_1 std 3,CANCEL_PARM_SAVE(1); DOCARGS_0
|
|
|
|
|
# define UNDOCARGS_1 ld 3,CANCEL_PARM_SAVE(1); UNDOCARGS_0
|
2003-03-17 11:22:52 +00:00
|
|
|
|
PowerPC64 ELFv2 ABI 4/6: Stack frame layout changes
This updates glibc for the changes in the ELFv2 relating to the
stack frame layout. These are described in more detail here:
http://gcc.gnu.org/ml/gcc-patches/2013-11/msg01149.html
http://gcc.gnu.org/ml/gcc-patches/2013-11/msg01146.html
Specifically, the "compiler and linker doublewords" were removed,
which has the effect that the save slot for the TOC register is
now at offset 24 rather than 40 to the stack pointer.
In addition, a function may now no longer necessarily assume that
its caller has set up a 64-byte register save area its use.
To address the first change, the patch goes through all assembler
files and replaces immediate offsets in instructions accessing the
ABI-defined stack slots by symbolic offsets. Those already were
defined in ucontext_i.sym and used in some of the context routines,
but that doesn't really seem like the right place for those defines.
The patch instead defines those symbolic offsets in sysdeps.h,
in two variants for the old and new ABI, and uses them systematically
in all assembler files, not just the context routines.
The second change only affected a few assembler files that used
the save area to temporarily store some registers. In those
cases where this happens within a leaf function, this patch
changes the code to store those registers to the "red zone"
below the stack pointer. Otherwise, the functions already allocate
a stack frame, and the patch changes them to add extra space in
these frames as temporary space for the ELFv2 ABI.
2013-12-04 12:55:03 +00:00
|
|
|
# define DOCARGS_2 std 4,CANCEL_PARM_SAVE+8(1); DOCARGS_1
|
|
|
|
|
# define UNDOCARGS_2 ld 4,CANCEL_PARM_SAVE+8(1); UNDOCARGS_1
|
2003-03-17 11:22:52 +00:00
|
|
|
|
PowerPC64 ELFv2 ABI 4/6: Stack frame layout changes
This updates glibc for the changes in the ELFv2 relating to the
stack frame layout. These are described in more detail here:
http://gcc.gnu.org/ml/gcc-patches/2013-11/msg01149.html
http://gcc.gnu.org/ml/gcc-patches/2013-11/msg01146.html
Specifically, the "compiler and linker doublewords" were removed,
which has the effect that the save slot for the TOC register is
now at offset 24 rather than 40 to the stack pointer.
In addition, a function may now no longer necessarily assume that
its caller has set up a 64-byte register save area its use.
To address the first change, the patch goes through all assembler
files and replaces immediate offsets in instructions accessing the
ABI-defined stack slots by symbolic offsets. Those already were
defined in ucontext_i.sym and used in some of the context routines,
but that doesn't really seem like the right place for those defines.
The patch instead defines those symbolic offsets in sysdeps.h,
in two variants for the old and new ABI, and uses them systematically
in all assembler files, not just the context routines.
The second change only affected a few assembler files that used
the save area to temporarily store some registers. In those
cases where this happens within a leaf function, this patch
changes the code to store those registers to the "red zone"
below the stack pointer. Otherwise, the functions already allocate
a stack frame, and the patch changes them to add extra space in
these frames as temporary space for the ELFv2 ABI.
2013-12-04 12:55:03 +00:00
|
|
|
# define DOCARGS_3 std 5,CANCEL_PARM_SAVE+16(1); DOCARGS_2
|
|
|
|
|
# define UNDOCARGS_3 ld 5,CANCEL_PARM_SAVE+16(1); UNDOCARGS_2
|
2003-03-17 11:22:52 +00:00
|
|
|
|
PowerPC64 ELFv2 ABI 4/6: Stack frame layout changes
This updates glibc for the changes in the ELFv2 relating to the
stack frame layout. These are described in more detail here:
http://gcc.gnu.org/ml/gcc-patches/2013-11/msg01149.html
http://gcc.gnu.org/ml/gcc-patches/2013-11/msg01146.html
Specifically, the "compiler and linker doublewords" were removed,
which has the effect that the save slot for the TOC register is
now at offset 24 rather than 40 to the stack pointer.
In addition, a function may now no longer necessarily assume that
its caller has set up a 64-byte register save area its use.
To address the first change, the patch goes through all assembler
files and replaces immediate offsets in instructions accessing the
ABI-defined stack slots by symbolic offsets. Those already were
defined in ucontext_i.sym and used in some of the context routines,
but that doesn't really seem like the right place for those defines.
The patch instead defines those symbolic offsets in sysdeps.h,
in two variants for the old and new ABI, and uses them systematically
in all assembler files, not just the context routines.
The second change only affected a few assembler files that used
the save area to temporarily store some registers. In those
cases where this happens within a leaf function, this patch
changes the code to store those registers to the "red zone"
below the stack pointer. Otherwise, the functions already allocate
a stack frame, and the patch changes them to add extra space in
these frames as temporary space for the ELFv2 ABI.
2013-12-04 12:55:03 +00:00
|
|
|
# define DOCARGS_4 std 6,CANCEL_PARM_SAVE+24(1); DOCARGS_3
|
|
|
|
|
# define UNDOCARGS_4 ld 6,CANCEL_PARM_SAVE+24(1); UNDOCARGS_3
|
2003-03-17 11:22:52 +00:00
|
|
|
|
PowerPC64 ELFv2 ABI 4/6: Stack frame layout changes
This updates glibc for the changes in the ELFv2 relating to the
stack frame layout. These are described in more detail here:
http://gcc.gnu.org/ml/gcc-patches/2013-11/msg01149.html
http://gcc.gnu.org/ml/gcc-patches/2013-11/msg01146.html
Specifically, the "compiler and linker doublewords" were removed,
which has the effect that the save slot for the TOC register is
now at offset 24 rather than 40 to the stack pointer.
In addition, a function may now no longer necessarily assume that
its caller has set up a 64-byte register save area its use.
To address the first change, the patch goes through all assembler
files and replaces immediate offsets in instructions accessing the
ABI-defined stack slots by symbolic offsets. Those already were
defined in ucontext_i.sym and used in some of the context routines,
but that doesn't really seem like the right place for those defines.
The patch instead defines those symbolic offsets in sysdeps.h,
in two variants for the old and new ABI, and uses them systematically
in all assembler files, not just the context routines.
The second change only affected a few assembler files that used
the save area to temporarily store some registers. In those
cases where this happens within a leaf function, this patch
changes the code to store those registers to the "red zone"
below the stack pointer. Otherwise, the functions already allocate
a stack frame, and the patch changes them to add extra space in
these frames as temporary space for the ELFv2 ABI.
2013-12-04 12:55:03 +00:00
|
|
|
# define DOCARGS_5 std 7,CANCEL_PARM_SAVE+32(1); DOCARGS_4
|
|
|
|
|
# define UNDOCARGS_5 ld 7,CANCEL_PARM_SAVE+32(1); UNDOCARGS_4
|
2003-03-17 11:22:52 +00:00
|
|
|
|
PowerPC64 ELFv2 ABI 4/6: Stack frame layout changes
This updates glibc for the changes in the ELFv2 relating to the
stack frame layout. These are described in more detail here:
http://gcc.gnu.org/ml/gcc-patches/2013-11/msg01149.html
http://gcc.gnu.org/ml/gcc-patches/2013-11/msg01146.html
Specifically, the "compiler and linker doublewords" were removed,
which has the effect that the save slot for the TOC register is
now at offset 24 rather than 40 to the stack pointer.
In addition, a function may now no longer necessarily assume that
its caller has set up a 64-byte register save area its use.
To address the first change, the patch goes through all assembler
files and replaces immediate offsets in instructions accessing the
ABI-defined stack slots by symbolic offsets. Those already were
defined in ucontext_i.sym and used in some of the context routines,
but that doesn't really seem like the right place for those defines.
The patch instead defines those symbolic offsets in sysdeps.h,
in two variants for the old and new ABI, and uses them systematically
in all assembler files, not just the context routines.
The second change only affected a few assembler files that used
the save area to temporarily store some registers. In those
cases where this happens within a leaf function, this patch
changes the code to store those registers to the "red zone"
below the stack pointer. Otherwise, the functions already allocate
a stack frame, and the patch changes them to add extra space in
these frames as temporary space for the ELFv2 ABI.
2013-12-04 12:55:03 +00:00
|
|
|
# define DOCARGS_6 std 8,CANCEL_PARM_SAVE+40(1); DOCARGS_5
|
|
|
|
|
# define UNDOCARGS_6 ld 8,CANCEL_PARM_SAVE+40(1); UNDOCARGS_5
|
2003-03-17 11:22:52 +00:00
|
|
|
|
2014-11-20 08:52:40 +00:00
|
|
|
# if IS_IN (libpthread)
|
2010-08-12 16:19:19 +00:00
|
|
|
# ifdef SHARED
|
|
|
|
|
# define CENABLE bl JUMPTARGET(__pthread_enable_asynccancel)
|
|
|
|
|
# define CDISABLE bl JUMPTARGET(__pthread_disable_asynccancel)
|
|
|
|
|
# else
|
|
|
|
|
# define CENABLE bl JUMPTARGET(__pthread_enable_asynccancel); nop
|
|
|
|
|
# define CDISABLE bl JUMPTARGET(__pthread_disable_asynccancel); nop
|
|
|
|
|
# endif
|
2014-11-24 09:33:45 +00:00
|
|
|
# elif IS_IN (libc)
|
2010-08-12 16:19:19 +00:00
|
|
|
# ifdef SHARED
|
|
|
|
|
# define CENABLE bl JUMPTARGET(__libc_enable_asynccancel)
|
|
|
|
|
# define CDISABLE bl JUMPTARGET(__libc_disable_asynccancel)
|
|
|
|
|
# else
|
|
|
|
|
# define CENABLE bl JUMPTARGET(__libc_enable_asynccancel); nop
|
|
|
|
|
# define CDISABLE bl JUMPTARGET(__libc_disable_asynccancel); nop
|
|
|
|
|
# endif
|
2014-11-20 07:56:25 +00:00
|
|
|
# elif IS_IN (librt)
|
2010-08-12 16:19:19 +00:00
|
|
|
# ifdef SHARED
|
|
|
|
|
# define CENABLE bl JUMPTARGET(__librt_enable_asynccancel)
|
|
|
|
|
# define CDISABLE bl JUMPTARGET(__librt_disable_asynccancel)
|
|
|
|
|
# else
|
|
|
|
|
# define CENABLE bl JUMPTARGET(__librt_enable_asynccancel); nop
|
|
|
|
|
# define CDISABLE bl JUMPTARGET(__librt_disable_asynccancel); nop
|
|
|
|
|
# endif
|
2003-06-17 08:58:31 +00:00
|
|
|
# else
|
|
|
|
|
# error Unsupported library
|
2003-03-17 11:22:52 +00:00
|
|
|
# endif
|
|
|
|
|
|
|
|
|
|
# ifndef __ASSEMBLER__
|
|
|
|
|
# define SINGLE_THREAD_P \
|
2003-04-25 22:28:13 +00:00
|
|
|
__builtin_expect (THREAD_GETMEM (THREAD_SELF, \
|
|
|
|
|
header.multiple_threads) == 0, 1)
|
2003-03-17 11:22:52 +00:00
|
|
|
# else
|
|
|
|
|
# define SINGLE_THREAD_P \
|
|
|
|
|
lwz 10,MULTIPLE_THREADS_OFFSET(13); \
|
2003-04-01 01:24:00 +00:00
|
|
|
cmpwi 10,0
|
2003-03-17 11:22:52 +00:00
|
|
|
# endif
|
|
|
|
|
|
|
|
|
|
#elif !defined __ASSEMBLER__
|
|
|
|
|
|
2006-10-29 21:50:49 +00:00
|
|
|
# define SINGLE_THREAD_P (1)
|
2004-07-06 04:26:42 +00:00
|
|
|
# define NO_CANCELLATION 1
|
2003-03-17 11:22:52 +00:00
|
|
|
|
|
|
|
|
#endif
|
2006-10-29 21:50:49 +00:00
|
|
|
|
|
|
|
|
#ifndef __ASSEMBLER__
|
|
|
|
|
# define RTLD_SINGLE_THREAD_P \
|
|
|
|
|
__builtin_expect (THREAD_GETMEM (THREAD_SELF, \
|
|
|
|
|
header.multiple_threads) == 0, 1)
|
|
|
|
|
#endif
|
