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Remove cancellation support for syscall generation

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This patch removes the cancellation mark from the auto-generation syscall
script.  Now all the cancellable syscalls are done throught C code using
the SYSCALL_CANCEL macro.  It simplifies the assembly required to each
architecture port, since the SYSCALL_CANCEL uses the already defined
INLINE_SYSCALL macros, and allows a more straigh fix on cancellation
machanism (since no more specific assembly fixes will be required).

Checked on i686-linux-gnu, x86_64-linux-gnu, x86_64-linux-gnux32,
aarch64-linux-gnu, arm-linux-gnueabihf, and powerpc64le-linux-gnu.A
Also with build-many-glibc.py with remaning touched architectures.

	* sysdeps/unix/make-syscalls.sh: Remove cancellable tagging for
	syscall definitions.
	* sysdeps/unix/syscall-template.S (SYSCALL_CANCELLABLE): Remove
	definition.
	* sysdeps/unix/sysv/linux/aarch64/sysdep-cancel.h (PSEUDO): Remove
	definition.
	(PSEUDO_END): Likewise.
	[IS_IN (libpthread)] (CENABLE): Likewise.
	[IS_IN (libpthread)] (CDISABLE): Likewise.
	[IS_IN (libc)] (CENABLE): Likewise.
	[IS_IN (libc)] (CENABLE): Likewise.
	[IS_IN (librt)] (CDISABLE): Likewise.
	[IS_IN (librt)] (CDISABLE): Likewise.
	[__ASSEMBLER__] (SINGLE_THREAD_P): Likewise.
	* sysdeps/unix/sysv/linux/alpha/sysdep-cancel.h (PSEUDO): Remove
	definition.
	(PSEUDO_END): Likewise.
	[IS_IN (libpthread)] (__local_enable_asynccancel): Likewise.
	[IS_IN (libpthread)] (__local_disable_asynccancel): Likewise.
	[IS_IN (libc)] (__local_enable_asynccancel): Likewise.
	[IS_IN (libc)] (__local_enable_asynccancel): Likewise.
	[IS_IN (librt)] (__local_disable_asynccancel): Likewise.
	[IS_IN (librt)] (__local_disable_asynccancel): Likewise.
	(CENABLE): Likewise.
	(CDISABLE): Likewise.
	[__ASSEMBLER__] (SINGLE_THREAD_P): Likewise.
	* sysdeps/unix/sysv/linux/arm/sysdep-cancel.h (PSEUDO): Remove
	defintion.
	(PSEUDO_END): Likewise.
	[IS_IN (libpthread)] (CENABLE): Likewise.
	[IS_IN (libpthread)] (CDISABLE): Likewise.
	[IS_IN (libc)] (CENABLE): Likewise.
	[IS_IN (libc)] (CENABLE): Likewise.
	[IS_IN (librt)] (CDISABLE): Likewise.
	[IS_IN (librt)] (CDISABLE): Likewise.
	[__ASSEMBLER__] (SINGLE_THREAD_P): Likewise.
	* sysdeps/unix/sysv/linux/hppa/sysdep-cancel.h (PSEUDO): Remove
	definition.
	(PSEUDO_END): Likewise.
	[IS_IN (libpthread)] (CENABLE): Likewise.
	[IS_IN (libpthread)] (CDISABLE): Likewise.
	[IS_IN (libc)] (CENABLE): Likewise.
	[IS_IN (libc)] (CENABLE): Likewise.
	[IS_IN (librt)] (CDISABLE): Likewise.
	[IS_IN (librt)] (CDISABLE): Likewise.
	[__ASSEMBLER__] (SINGLE_THREAD_P): Likewise.
	* sysdeps/unix/sysv/linux/i386/sysdep-cancel.h (PSEUDO): Remove
	definition.
	(PSEUDO_END): Likewise.
	[IS_IN (libpthread)] (CENABLE): Likewise.
	[IS_IN (libpthread)] (CDISABLE): Likewise.
	[IS_IN (libc)] (CENABLE): Likewise.
	[IS_IN (libc)] (CENABLE): Likewise.
	[IS_IN (librt)] (CDISABLE): Likewise.
	[IS_IN (librt)] (CDISABLE): Likewise.
	[__ASSEMBLER__] (SINGLE_THREAD_P): Likewise.
	* sysdeps/unix/sysv/linux/ia64/sysdep-cancel.h (PSEUDO): Remove
	definition.
	(PSEUDO_END): Likewise.
	[IS_IN (libpthread)] (CENABLE): Likewise.
	[IS_IN (libpthread)] (CDISABLE): Likewise.
	[IS_IN (libc)] (CENABLE): Likewise.
	[IS_IN (libc)] (CENABLE): Likewise.
	[IS_IN (librt)] (CDISABLE): Likewise.
	[IS_IN (librt)] (CDISABLE): Likewise.
	[__ASSEMBLER__] (SINGLE_THREAD_P): Likewise.
	* sysdeps/unix/sysv/linux/m68k/sysdep-cancel.h (PSEUDO): Remove
	definition.
	(PSEUDO_END): Likewise.
	[IS_IN (libpthread)] (CENABLE): Likewise.
	[IS_IN (libpthread)] (CDISABLE): Likewise.
	[IS_IN (libc)] (CENABLE): Likewise.
	[IS_IN (libc)] (CENABLE): Likewise.
	[IS_IN (librt)] (CDISABLE): Likewise.
	[IS_IN (librt)] (CDISABLE): Likewise.
	[__ASSEMBLER__] (SINGLE_THREAD_P): Likewise.
	* sysdeps/unix/sysv/linux/microblaze/sysdep-cancel.h (PSEUDO): Remove
	definition.
	(PSEUDO_END): Likewise.
	[IS_IN (libpthread)] (CENABLE): Likewise.
	[IS_IN (libpthread)] (CDISABLE): Likewise.
	[IS_IN (libc)] (CENABLE): Likewise.
	[IS_IN (libc)] (CENABLE): Likewise.
	[IS_IN (librt)] (CDISABLE): Likewise.
	[IS_IN (librt)] (CDISABLE): Likewise.
	[__ASSEMBLER__] (SINGLE_THREAD_P): Likewise.
	* sysdeps/unix/sysv/linux/mips/mips64/sysdep-cancel.h (PSEUDO):
	Remove definition.
	(PSEUDO_END): Likewise.
	[IS_IN (libpthread)] (CENABLE): Likewise.
	[IS_IN (libpthread)] (CDISABLE): Likewise.
	[IS_IN (libc)] (CENABLE): Likewise.
	[IS_IN (libc)] (CENABLE): Likewise.
	[IS_IN (librt)] (CDISABLE): Likewise.
	[IS_IN (librt)] (CDISABLE): Likewise.
	(SINGLE_THREAD_P): Likewise.
	* sysdeps/unix/sysv/linux/mips/sysdep-cancel.h (PSEUDO): Remove
	definition.
	(PSEUDO_END): Likewise.
	[IS_IN (libpthread)] (CENABLE): Likewise.
	[IS_IN (libpthread)] (CDISABLE): Likewise.
	[IS_IN (libc)] (CENABLE): Likewise.
	[IS_IN (libc)] (CENABLE): Likewise.
	[IS_IN (librt)] (CDISABLE): Likewise.
	[IS_IN (librt)] (CDISABLE): Likewise.
	[__ASSEMBLER__] (SINGLE_THREAD_P): Likewise.
	* sysdeps/unix/sysv/linux/nios2/sysdep-cancel.h (PSEUDO): Remove
	definition.
	(PSEUDO_END): Likewise.
	[IS_IN (libpthread)] (CENABLE): Likewise.
	[IS_IN (libpthread)] (CDISABLE): Likewise.
	[IS_IN (libc)] (CENABLE): Likewise.
	[IS_IN (libc)] (CENABLE): Likewise.
	[IS_IN (librt)] (CDISABLE): Likewise.
	[IS_IN (librt)] (CDISABLE): Likewise.
	[__ASSEMBLER__] (SINGLE_THREAD_P): Likewise.
	* sysdeps/sysv/linux/powerpc/powerpc32/sysdep-cancel.h: Remove file.
	* sysdeps/sysv/linux/powerpc/powerpc64/sysdep-cancel.h: Likewise.
	* sysdeps/unix/sysv/linux/powerpc/sysdep-cancel.h: New file.
	* sysdeps/unix/sysv/linux/s390/s390-32/sysdep-cancel.h (PSEUDO): Remove
	definition.
	(PSEUDO_END): Likewise.
	[IS_IN (libpthread)] (CENABLE): Likewise.
	[IS_IN (libpthread)] (CDISABLE): Likewise.
	[IS_IN (libc)] (CENABLE): Likewise.
	[IS_IN (libc)] (CENABLE): Likewise.
	[IS_IN (librt)] (CDISABLE): Likewise.
	[IS_IN (librt)] (CDISABLE): Likewise.
	[__ASSEMBLER__] (SINGLE_THREAD_P): Likewise.
	* sysdeps/unix/sysv/linux/s390/s390-64/sysdep-cancel.h (PSEUDO): Remove
	definition.
	(PSEUDO_END): Likewise.
	[IS_IN (libpthread)] (CENABLE): Likewise.
	[IS_IN (libpthread)] (CDISABLE): Likewise.
	[IS_IN (libc)] (CENABLE): Likewise.
	[IS_IN (libc)] (CENABLE): Likewise.
	[IS_IN (librt)] (CDISABLE): Likewise.
	[IS_IN (librt)] (CDISABLE): Likewise.
	[__ASSEMBLER__] (SINGLE_THREAD_P): Likewise.
	* sysdeps/unix/sysv/linux/sh/sysdep-cancel.h (PSEUDO): Remove
	definition.
	(PSEUDO_END): Likewise.
	[IS_IN (libpthread)] (CENABLE): Likewise.
	[IS_IN (libpthread)] (CDISABLE): Likewise.
	[IS_IN (libc)] (CENABLE): Likewise.
	[IS_IN (libc)] (CENABLE): Likewise.
	[IS_IN (librt)] (CDISABLE): Likewise.
	[IS_IN (librt)] (CDISABLE): Likewise.
	[__ASSEMBLER__] (SINGLE_THREAD_P): Likewise.
	* sysdeps/unix/sysv/linux/sparc/sparc32/sysdep-cancel.h: Remove file.
	* sysdeps/unix/sysv/linux/sparc/sparc64/sysdep-cancel.h: Likewise.
	* sysdeps/unix/sysv/linux/sparc/sysdep-cancel.h: New file.
	* sysdeps/unix/sysv/linux/tile/sysdep-cancel.h (PSEUDO): Remove
	definition.
	(PSEUDO_END): Likewise.
	[IS_IN (libpthread)] (CENABLE): Likewise.
	[IS_IN (libpthread)] (CDISABLE): Likewise.
	[IS_IN (libc)] (CENABLE): Likewise.
	[IS_IN (libc)] (CENABLE): Likewise.
	[IS_IN (librt)] (CDISABLE): Likewise.
	[IS_IN (librt)] (CDISABLE): Likewise.
	[__ASSEMBLER__] (SINGLE_THREAD_P): Likewise.
	* sysdeps/unix/sysv/linux/x86_64/sysdep-cancel.h (PSEUDO): Remove
	definition.
	(PSEUDO_END): Likewise.
	[IS_IN (libpthread)] (CENABLE): Likewise.
	[IS_IN (libpthread)] (CDISABLE): Likewise.
	[IS_IN (libc)] (CENABLE): Likewise.
	[IS_IN (libc)] (CENABLE): Likewise.
	[IS_IN (librt)] (CDISABLE): Likewise.
	[IS_IN (librt)] (CDISABLE): Likewise.
	[__ASSEMBLER__] (SINGLE_THREAD_P): Likewise.
This commit is contained in:
Adhemerval Zanella
2015-11-12 14:01:36 -02:00
parent 8aa48656bb
commit ebd6f0076a
25 changed files with 348 additions and 2766 deletions
Download Patch File Download Diff File Expand all files Collapse all files

249
sysdeps/unix/sysv/linux/mips/mips64/sysdep-cancel.h
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@@ -1,249 +0,0 @@
/* Copyright (C) 2003-2017 Free Software Foundation, Inc.
This file is part of the GNU C Library.
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
License along with the GNU C Library. If not, see
<http://www.gnu.org/licenses/>. */
#include <sysdep.h>
#include <sysdeps/generic/sysdep.h>
#include <tls.h>
#ifndef __ASSEMBLER__
# include <nptl/pthreadP.h>
#endif
#include <sys/asm.h>
/* Gas will put the initial save of $gp into the CIE, because it appears to
happen before any instructions. So we use cfi_same_value instead of
cfi_restore. */
#if IS_IN (libc) || IS_IN (libpthread) || IS_IN (librt)
#ifdef __PIC__
# undef PSEUDO
# define PSEUDO(name, syscall_name, args) \
.align 2; \
L(pseudo_start): \
cfi_startproc; \
cfi_adjust_cfa_offset (STKSPACE); \
cfi_rel_offset (gp, STKOFF_GP); \
99: PTR_LA t9,__syscall_error; \
/* manual cpreturn */ \
REG_L gp, STKOFF_GP(sp); \
cfi_same_value (gp); \
RESTORESTK; \
jr t9; \
.type __##syscall_name##_nocancel, @function; \
.globl __##syscall_name##_nocancel; \
__##syscall_name##_nocancel: \
SAVESTK; \
.cpsetup t9, STKOFF_GP, __##syscall_name##_nocancel; \
cfi_rel_offset (gp, STKOFF_GP); \
li v0, SYS_ify(syscall_name); \
syscall; \
bne a3, zero, SYSCALL_ERROR_LABEL; \
/* manual cpreturn */ \
REG_L gp, STKOFF_GP(sp); \
cfi_same_value (gp); \
RESTORESTK; \
ret; \
cfi_endproc; \
.size __##syscall_name##_nocancel,.-__##syscall_name##_nocancel; \
ENTRY (name) \
SAVESTK; \
.cpsetup t9, STKOFF_GP, name; \
cfi_rel_offset (gp, STKOFF_GP); \
SINGLE_THREAD_P(v1); \
bne zero, v1, L(pseudo_cancel); \
.set noreorder; \
li v0, SYS_ify(syscall_name); \
syscall; \
.set reorder; \
bne a3, zero, SYSCALL_ERROR_LABEL; \
/* manual cpreturn */ \
REG_L gp, STKOFF_GP(sp); \
cfi_same_value (gp); \
RESTORESTK; \
ret; \
L(pseudo_cancel): \
cfi_adjust_cfa_offset (STKSPACE); \
cfi_rel_offset (gp, STKOFF_GP); \
REG_S ra, STKOFF_RA(sp); \
cfi_rel_offset (ra, STKOFF_RA); \
PUSHARGS_##args; /* save syscall args */ \
CENABLE; \
REG_S v0, STKOFF_SVMSK(sp); /* save mask */ \
POPARGS_##args; /* restore syscall args */ \
.set noreorder; \
li v0, SYS_ify (syscall_name); \
syscall; \
.set reorder; \
REG_S v0, STKOFF_SC_V0(sp); /* save syscall result */ \
REG_S a3, STKOFF_SC_ERR(sp); /* save syscall error flag */ \
REG_L a0, STKOFF_SVMSK(sp); /* pass mask as arg1 */ \
CDISABLE; \
REG_L a3, STKOFF_SC_ERR(sp); /* restore syscall error flag */ \
REG_L ra, STKOFF_RA(sp); /* restore return address */ \
REG_L v0, STKOFF_SC_V0(sp); /* restore syscall result */ \
bne a3, zero, SYSCALL_ERROR_LABEL; \
/* manual cpreturn */ \
REG_L gp, STKOFF_GP(sp); \
cfi_same_value (gp); \
RESTORESTK; \
L(pseudo_end):
#else
# undef PSEUDO
# define PSEUDO(name, syscall_name, args) \
.align 2; \
L(pseudo_start): \
cfi_startproc; \
cfi_adjust_cfa_offset (STKSPACE); \
99: RESTORESTK; \
j __syscall_error; \
.type __##syscall_name##_nocancel, @function; \
.globl __##syscall_name##_nocancel; \
__##syscall_name##_nocancel: \
SAVESTK; \
li v0, SYS_ify(syscall_name); \
syscall; \
bne a3, zero, SYSCALL_ERROR_LABEL; \
RESTORESTK; \
ret; \
cfi_endproc; \
.size __##syscall_name##_nocancel,.-__##syscall_name##_nocancel; \
ENTRY (name) \
SAVESTK; \
SINGLE_THREAD_P(v1); \
bne zero, v1, L(pseudo_cancel); \
.set noreorder; \
li v0, SYS_ify(syscall_name); \
syscall; \
.set reorder; \
bne a3, zero, SYSCALL_ERROR_LABEL; \
RESTORESTK; \
ret; \
L(pseudo_cancel): \
cfi_adjust_cfa_offset (STKSPACE); \
REG_S ra, STKOFF_RA(sp); \
cfi_rel_offset (ra, STKOFF_RA); \
PUSHARGS_##args; /* save syscall args */ \
CENABLE; \
REG_S v0, STKOFF_SVMSK(sp); /* save mask */ \
POPARGS_##args; /* restore syscall args */ \
.set noreorder; \
li v0, SYS_ify (syscall_name); \
syscall; \
.set reorder; \
REG_S v0, STKOFF_SC_V0(sp); /* save syscall result */ \
REG_S a3, STKOFF_SC_ERR(sp); /* save syscall error flag */ \
REG_L a0, STKOFF_SVMSK(sp); /* pass mask as arg1 */ \
CDISABLE; \
REG_L a3, STKOFF_SC_ERR(sp); /* restore syscall error flag */ \
REG_L ra, STKOFF_RA(sp); /* restore return address */ \
REG_L v0, STKOFF_SC_V0(sp); /* restore syscall result */ \
bne a3, zero, SYSCALL_ERROR_LABEL; \
RESTORESTK; \
L(pseudo_end):
#endif
# undef PSEUDO_END
# define PSEUDO_END(sym) cfi_endproc; .end sym; .size sym,.-sym
# define PUSHARGS_0 /* nothing to do */
# define PUSHARGS_1 PUSHARGS_0 REG_S a0, STKOFF_A0(sp); cfi_rel_offset (a0, STKOFF_A0);
# define PUSHARGS_2 PUSHARGS_1 REG_S a1, STKOFF_A1(sp); cfi_rel_offset (a1, STKOFF_A1);
# define PUSHARGS_3 PUSHARGS_2 REG_S a2, STKOFF_A2(sp); cfi_rel_offset (a2, STKOFF_A2);
# define PUSHARGS_4 PUSHARGS_3 REG_S a3, STKOFF_A3(sp); cfi_rel_offset (a3, STKOFF_A3);
# define PUSHARGS_5 PUSHARGS_4 REG_S a4, STKOFF_A4(sp); cfi_rel_offset (a3, STKOFF_A4);
# define PUSHARGS_6 PUSHARGS_5 REG_S a5, STKOFF_A5(sp); cfi_rel_offset (a3, STKOFF_A5);
# define POPARGS_0 /* nothing to do */
# define POPARGS_1 POPARGS_0 REG_L a0, STKOFF_A0(sp);
# define POPARGS_2 POPARGS_1 REG_L a1, STKOFF_A1(sp);
# define POPARGS_3 POPARGS_2 REG_L a2, STKOFF_A2(sp);
# define POPARGS_4 POPARGS_3 REG_L a3, STKOFF_A3(sp);
# define POPARGS_5 POPARGS_4 REG_L a4, STKOFF_A4(sp);
# define POPARGS_6 POPARGS_5 REG_L a5, STKOFF_A5(sp);
/* Save an even number of slots. Should be 0 if an even number of slots
are used below, or SZREG if an odd number are used. */
# ifdef __PIC__
# define STK_PAD SZREG
# else
# define STK_PAD 0
# endif
/* Place values that we are more likely to use later in this sequence, i.e.
closer to the SP at function entry. If you do that, the are more
likely to already be in your d-cache. */
# define STKOFF_A5 (STK_PAD)
# define STKOFF_A4 (STKOFF_A5 + SZREG)
# define STKOFF_A3 (STKOFF_A4 + SZREG)
# define STKOFF_A2 (STKOFF_A3 + SZREG) /* MT and more args. */
# define STKOFF_A1 (STKOFF_A2 + SZREG) /* MT and 2 args. */
# define STKOFF_A0 (STKOFF_A1 + SZREG) /* MT and 1 arg. */
# define STKOFF_RA (STKOFF_A0 + SZREG) /* Used if MT. */
# define STKOFF_SC_V0 (STKOFF_RA + SZREG) /* Used if MT. */
# define STKOFF_SC_ERR (STKOFF_SC_V0 + SZREG) /* Used if MT. */
# define STKOFF_SVMSK (STKOFF_SC_ERR + SZREG) /* Used if MT. */
# ifdef __PIC__
# define STKOFF_GP (STKOFF_SVMSK + SZREG) /* Always used. */
# define STKSPACE (STKOFF_GP + SZREG)
# else
# define STKSPACE (STKOFF_SVMSK + SZREG)
# endif
# define SAVESTK PTR_SUBU sp, STKSPACE; cfi_adjust_cfa_offset(STKSPACE)
# define RESTORESTK PTR_ADDU sp, STKSPACE; cfi_adjust_cfa_offset(-STKSPACE)
# ifdef __PIC__
# define PSEUDO_JMP(sym) PTR_LA t9, sym; jalr t9
# else
# define PSEUDO_JMP(sym) jal sym
# endif
# if IS_IN (libpthread)
# define CENABLE PSEUDO_JMP (__pthread_enable_asynccancel)
# define CDISABLE PSEUDO_JMP (__pthread_disable_asynccancel)
# elif IS_IN (librt)
# define CENABLE PSEUDO_JMP (__librt_enable_asynccancel)
# define CDISABLE PSEUDO_JMP (__librt_disable_asynccancel)
# else
# define CENABLE PSEUDO_JMP (__libc_enable_asynccancel)
# define CDISABLE PSEUDO_JMP (__libc_disable_asynccancel)
# endif
# ifndef __ASSEMBLER__
# define SINGLE_THREAD_P \
__builtin_expect (THREAD_GETMEM (THREAD_SELF, \
header.multiple_threads) \
== 0, 1)
# else
# define SINGLE_THREAD_P(reg) \
READ_THREAD_POINTER(reg); \
lw reg, MULTIPLE_THREADS_OFFSET(reg)
#endif
#elif !defined __ASSEMBLER__
# define SINGLE_THREAD_P 1
# define NO_CANCELLATION 1
#endif
#ifndef __ASSEMBLER__
# define RTLD_SINGLE_THREAD_P \
__builtin_expect (THREAD_GETMEM (THREAD_SELF, \
header.multiple_threads) == 0, 1)
#endif

166
sysdeps/unix/sysv/linux/mips/sysdep-cancel.h
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@@ -18,173 +18,19 @@
#include <sysdep.h>
#include <sysdeps/generic/sysdep.h>
#include <tls.h>
#ifndef __ASSEMBLER__
# include <nptl/pthreadP.h>
#endif
#include <nptl/pthreadP.h>
#if IS_IN (libc) || IS_IN (libpthread) || IS_IN (librt)
# ifdef __PIC__
# define PSEUDO_CPLOAD .cpload t9;
# define PSEUDO_ERRJMP la t9, __syscall_error; jr t9;
# define PSEUDO_SAVEGP sw gp, 32(sp); cfi_rel_offset (gp, 32);
# define PSEUDO_LOADGP lw gp, 32(sp);
# else
# define PSEUDO_CPLOAD
# define PSEUDO_ERRJMP j __syscall_error;
# define PSEUDO_SAVEGP
# define PSEUDO_LOADGP
# endif
# define SINGLE_THREAD_P \
__glibc_likely (THREAD_GETMEM (THREAD_SELF, header.multiple_threads) == 0)
# undef PSEUDO
# define PSEUDO(name, syscall_name, args) \
.align 2; \
.set nomips16; \
L(pseudo_start): \
cfi_startproc; \
99: PSEUDO_ERRJMP \
.type __##syscall_name##_nocancel, @function; \
.globl __##syscall_name##_nocancel; \
__##syscall_name##_nocancel: \
.set noreorder; \
PSEUDO_CPLOAD \
li v0, SYS_ify(syscall_name); \
syscall; \
.set reorder; \
bne a3, zero, 99b; \
ret; \
cfi_endproc; \
.size __##syscall_name##_nocancel,.-__##syscall_name##_nocancel; \
ENTRY (name) \
.set noreorder; \
PSEUDO_CPLOAD \
.set reorder; \
SINGLE_THREAD_P(v1); \
bne zero, v1, L(pseudo_cancel); \
.set noreorder; \
li v0, SYS_ify(syscall_name); \
syscall; \
.set reorder; \
bne a3, zero, 99b; \
ret; \
L(pseudo_cancel): \
SAVESTK_##args; \
sw ra, 28(sp); \
cfi_rel_offset (ra, 28); \
PSEUDO_SAVEGP \
PUSHARGS_##args; /* save syscall args */ \
CENABLE; \
PSEUDO_LOADGP \
sw v0, 44(sp); /* save mask */ \
POPARGS_##args; /* restore syscall args */ \
.set noreorder; \
li v0, SYS_ify (syscall_name); \
syscall; \
.set reorder; \
sw v0, 36(sp); /* save syscall result */ \
sw a3, 40(sp); /* save syscall error flag */ \
lw a0, 44(sp); /* pass mask as arg1 */ \
CDISABLE; \
PSEUDO_LOADGP \
lw v0, 36(sp); /* restore syscall result */ \
lw a3, 40(sp); /* restore syscall error flag */ \
lw ra, 28(sp); /* restore return address */ \
.set noreorder; \
bne a3, zero, 99b; \
RESTORESTK; \
L(pseudo_end): \
.set reorder;
# undef PSEUDO_END
# define PSEUDO_END(sym) cfi_endproc; .end sym; .size sym,.-sym
# define PUSHARGS_0 /* nothing to do */
# define PUSHARGS_1 PUSHARGS_0 sw a0, 0(sp); cfi_rel_offset (a0, 0);
# define PUSHARGS_2 PUSHARGS_1 sw a1, 4(sp); cfi_rel_offset (a1, 4);
# define PUSHARGS_3 PUSHARGS_2 sw a2, 8(sp); cfi_rel_offset (a2, 8);
# define PUSHARGS_4 PUSHARGS_3 sw a3, 12(sp); cfi_rel_offset (a3, 12);
# define PUSHARGS_5 PUSHARGS_4 /* handled by SAVESTK_## */
# define PUSHARGS_6 PUSHARGS_5
# define PUSHARGS_7 PUSHARGS_6
# define POPARGS_0 /* nothing to do */
# define POPARGS_1 POPARGS_0 lw a0, 0(sp);
# define POPARGS_2 POPARGS_1 lw a1, 4(sp);
# define POPARGS_3 POPARGS_2 lw a2, 8(sp);
# define POPARGS_4 POPARGS_3 lw a3, 12(sp);
# define POPARGS_5 POPARGS_4 /* args already in new stackframe */
# define POPARGS_6 POPARGS_5
# define POPARGS_7 POPARGS_6
# define STKSPACE 48
# define SAVESTK_0 subu sp, STKSPACE; cfi_adjust_cfa_offset(STKSPACE)
# define SAVESTK_1 SAVESTK_0
# define SAVESTK_2 SAVESTK_1
# define SAVESTK_3 SAVESTK_2
# define SAVESTK_4 SAVESTK_3
# define SAVESTK_5 lw t0, 16(sp); \
SAVESTK_0; \
sw t0, 16(sp)
# define SAVESTK_6 lw t0, 16(sp); \
lw t1, 20(sp); \
SAVESTK_0; \
sw t0, 16(sp); \
sw t1, 20(sp)
# define SAVESTK_7 lw t0, 16(sp); \
lw t1, 20(sp); \
lw t2, 24(sp); \
SAVESTK_0; \
sw t0, 16(sp); \
sw t1, 20(sp); \
sw t2, 24(sp)
# define RESTORESTK addu sp, STKSPACE; cfi_adjust_cfa_offset(-STKSPACE)
# ifdef __PIC__
/* We use jalr rather than jal. This means that the assembler will not
automatically restore $gp (in case libc has multiple GOTs) so we must
do it manually - which we have to do anyway since we don't use .cprestore.
It also shuts up the assembler warning about not using .cprestore. */
# define PSEUDO_JMP(sym) la t9, sym; jalr t9;
# else
# define PSEUDO_JMP(sym) jal sym;
# endif
# if IS_IN (libpthread)
# define CENABLE PSEUDO_JMP (__pthread_enable_asynccancel)
# define CDISABLE PSEUDO_JMP (__pthread_disable_asynccancel)
# elif IS_IN (librt)
# define CENABLE PSEUDO_JMP (__librt_enable_asynccancel)
# define CDISABLE PSEUDO_JMP (__librt_disable_asynccancel)
# else
# define CENABLE PSEUDO_JMP (__libc_enable_asynccancel)
# define CDISABLE PSEUDO_JMP (__libc_disable_asynccancel)
# endif
# ifndef __ASSEMBLER__
# define SINGLE_THREAD_P \
__builtin_expect (THREAD_GETMEM (THREAD_SELF, \
header.multiple_threads) \
== 0, 1)
# else
# define SINGLE_THREAD_P(reg) \
READ_THREAD_POINTER(reg); \
lw reg, MULTIPLE_THREADS_OFFSET(reg)
#endif
#elif !defined __ASSEMBLER__
#else
# define SINGLE_THREAD_P 1
# define NO_CANCELLATION 1
#endif
#ifndef __ASSEMBLER__
# define RTLD_SINGLE_THREAD_P \
__builtin_expect (THREAD_GETMEM (THREAD_SELF, \
header.multiple_threads) == 0, 1)
#endif
#define RTLD_SINGLE_THREAD_P \
__glibc_likely (THREAD_GETMEM (THREAD_SELF, header.multiple_threads) == 0)