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/*
* Copyright (C) 2016-2017 Andes Technology, Inc.
* Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
*/
/* Copyright (C) 2003-2013 Free Software Foundation, Inc.
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 <tls.h>
#ifndef __ASSEMBLER__
# include <pthreadP.h>
#endif
#define PUSHARGS_0
#define PUSHARGS_1 smw.adm $r0, [$sp], $r0, #0; \
cfi_adjust_cfa_offset(4); \
cfi_rel_offset(r0,0); \
addi $sp, $sp, -4; \
cfi_adjust_cfa_offset(4);
#define PUSHARGS_2 smw.adm $r0, [$sp], $r1, #0; \
cfi_adjust_cfa_offset(8); \
cfi_rel_offset(r1, 4); \
cfi_rel_offset(r0, 0);
#define PUSHARGS_3 smw.adm $r0, [$sp], $r2, #0; \
cfi_adjust_cfa_offset(12); \
cfi_rel_offset(r2, 8); \
cfi_rel_offset(r1, 4); \
cfi_rel_offset(r0, 0); \
addi $sp, $sp, -4; \
cfi_adjust_cfa_offset(4);
#define PUSHARGS_4 smw.adm $r0, [$sp], $r3, #0; \
cfi_adjust_cfa_offset(16); \
cfi_rel_offset(r3, 12); \
cfi_rel_offset(r2, 8); \
cfi_rel_offset(r1, 4); \
cfi_rel_offset(r0, 0);
#define PUSHARGS_5 smw.adm $r0, [$sp], $r4, #0; \
cfi_adjust_cfa_offset(20); \
cfi_rel_offset(r4, 16); \
cfi_rel_offset(r3, 12); \
cfi_rel_offset(r2, 8); \
cfi_rel_offset(r1, 4); \
cfi_rel_offset(r0, 0); \
addi $sp, $sp, -4; \
cfi_adjust_cfa_offset(4);
#define PUSHARGS_6 smw.adm $r0, [$sp], $r5, #0; \
cfi_adjust_cfa_offset(24); \
cfi_rel_offset(r5, 20); \
cfi_rel_offset(r4, 16); \
cfi_rel_offset(r3, 12); \
cfi_rel_offset(r2, 8); \
cfi_rel_offset(r1, 4); \
cfi_rel_offset(r0, 0);
#define POPARGS2_0
#define POPARGS2_1 addi $sp, $sp, 4; \
cfi_adjust_cfa_offset(-4); \
lmw.bim $r0, [$sp], $r0, #0; \
cfi_adjust_cfa_offset(-4); \
cfi_restore(r0);
#define POPARGS2_2 lmw.bim $r0, [$sp], $r1, #0; \
cfi_adjust_cfa_offset(-8); \
cfi_restore(r0); \
cfi_restore(r1);
#define POPARGS2_3 addi $sp, $sp, 4; \
cfi_adjust_cfa_offset(-4); \
lmw.bim $r0, [$sp], $r2, #0; \
cfi_adjust_cfa_offset(-12); \
cfi_restore(r0); \
cfi_restore(r1); \
cfi_restore(r2);
#define POPARGS2_4 lmw.bim $r0, [$sp], $r3, #0; \
cfi_adjust_cfa_offset(-16); \
cfi_restore(r0); \
cfi_restore(r1); \
cfi_restore(r2); \
cfi_restore(r3);
#define POPARGS2_5 addi $sp, $sp, 4; \
cfi_adjust_cfa_offset(-4); \
lmw.bim $r0, [$sp], $r4, #0; \
cfi_adjust_cfa_offset(-20); \
cfi_restore(r0); \
cfi_restore(r1); \
cfi_restore(r2); \
cfi_restore(r3); \
cfi_restore(r4);
#define POPARGS2_6 lmw.bim $r0, [$sp], $r5, #0; \
cfi_adjust_cfa_offset(-24); \
cfi_restore(r0); \
cfi_restore(r1); \
cfi_restore(r2); \
cfi_restore(r3); \
cfi_restore(r4); \
cfi_restore(r5);
#if !defined NOT_IN_libc || defined IS_IN_libpthread || defined IS_IN_librt
/* NOTE: We do mark syscalls with unwind annotations, for the benefit of
cancellation; but they're really only accurate at the point of the
syscall. The ARM unwind directives are not rich enough without adding
a custom personality function. */
# undef PSEUDO
# define PSEUDO(name, syscall_name, args) \
.align 2; \
ENTRY (__##syscall_name##_nocancel); \
__do_syscall(syscall_name); \
PSEUDO_RET; \
ret; \
END (__##syscall_name##_nocancel); \
ENTRY (name); \
smw.adm $r6,[$sp],$r6,0x2; \
cfi_adjust_cfa_offset(8); \
cfi_offset(r6,-8); \
cfi_offset(lp,-4); \
SINGLE_THREAD_P ($r15); \
bgtz $r15, .Lpseudo_cancel; \
__do_syscall(syscall_name); \
j 50f; \
.Lpseudo_cancel: \
PUSHARGS_##args; /* save syscall args etc. around CENABLE. */ \
CENABLE ($r5); \
mov55 $r6, $r0; /* put mask in safe place. */ \
POPARGS2_##args; \
__do_syscall(syscall_name); /* do the call. */ \
push $r0; \
cfi_adjust_cfa_offset(4); \
cfi_rel_offset(r0, 0); \
addi $sp, $sp, -4; \
cfi_adjust_cfa_offset(4); \
mov55 $r0, $r6; /* save syscall return value. */\
CDISABLE($r5); \
addi $sp, $sp, 4; \
cfi_adjust_cfa_offset(-4); \
pop $r0; /* retrieve return value. */ \
cfi_adjust_cfa_offset(-4); \
cfi_restore(r0); \
50: \
lmw.bim $r6,[$sp],$r6, 0x2; \
cfi_adjust_cfa_offset(-8); \
cfi_restore(lp); \
cfi_restore(r6); \
PSEUDO_RET;
# ifndef __ASSEMBLER__
//# if defined IS_IN_libpthread || !defined NOT_IN_libc
//extern int __local_multiple_threads attribute_hidden;
//# define SINGLE_THREAD_P __builtin_expect (__local_multiple_threads == 0, 1)
//# else
/* There is no __local_multiple_threads for librt */
# define SINGLE_THREAD_P __builtin_expect (THREAD_GETMEM (THREAD_SELF, \
header.multiple_threads) == 0, 1)
//# endif
# else
# define SINGLE_THREAD_P(reg) \
addi reg, $r25, MULTIPLE_THREADS_OFFSET; \
lw reg, [reg];
# define SINGLE_THREAD_P_PIC(x) SINGLE_THREAD_P(x)
# endif
# ifdef IS_IN_libpthread
# define CENABLE(reg) jmp(reg, __pthread_enable_asynccancel)
# define CDISABLE(reg) jmp(reg, __pthread_disable_asynccancel)
# define __local_multiple_threads __pthread_multiple_threads
# elif !defined NOT_IN_libc
# define CENABLE(reg) jmp(reg, __libc_enable_asynccancel)
# define CDISABLE(reg) jmp(reg, __libc_disable_asynccancel)
# define __local_multiple_threads __libc_multiple_threads
# elif defined IS_IN_librt
# define CENABLE(reg) jmp(reg, __librt_enable_asynccancel)
# define CDISABLE(reg) jmp(reg, __librt_disable_asynccancel)
# else
# error Unsupported library
# endif
#elif !defined __ASSEMBLER__
/* For rtld, et cetera. */
# 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
#ifdef PIC
#define PSEUDO_RET \
.pic \
.align 2; \
bgez $r0, 1f; \
sltsi $r1, $r0, -4096; \
bgtz $r1, 1f; \
PIC_jmp_err \
nop; \
1:
#else /* PIC*/
#define PSEUDO_RET \
.align 2; \
bgez $r0, 1f; \
sltsi $r1, $r0, -4096; \
bgtz $r1, 1f; \
j SYSCALL_ERROR; \
1:
#endif
#ifdef PIC
#define jmp(reg, symble) PIC_jmpr(reg, symble)
/* reg: available register */
#define PIC_jmp_err \
smw.adm $sp,[$sp],$sp,#0x6; \
mfusr $r15, $PC; \
sethi $gp, hi20(_GLOBAL_OFFSET_TABLE_ + 4); \
ori $gp, $gp, lo12(_GLOBAL_OFFSET_TABLE_ + 8); \
add $gp, $r15, $gp; \
sethi $r15, hi20(SYSCALL_ERROR@PLT); \
ori $r15, $r15, lo12(SYSCALL_ERROR@PLT); \
add $r15, $r15, $gp; \
jral $r15; \
lmw.bim $sp,[$sp],$sp,#0x6; \
ret;
#define PIC_jmp(reg, symble) \
mfusr $r15, $PC; \
sethi reg, hi20(_GLOBAL_OFFSET_TABLE_ + 4); \
ori reg, reg, lo12(_GLOBAL_OFFSET_TABLE_ + 8); \
add reg, $r15, reg; \
sethi $r15, hi20(symble@PLT); \
ori $r15, $r15, lo12(symble@PLT); \
add $r15, $r15, reg; \
jr $r15;
#define PIC_jmpr(reg, symble) \
mfusr $r15, $PC; \
sethi reg, hi20(_GLOBAL_OFFSET_TABLE_ + 4); \
ori reg, reg, lo12(_GLOBAL_OFFSET_TABLE_ + 8); \
add reg, $r15, reg; \
sethi $r15, hi20(symble@PLT); \
ori $r15, $r15, lo12(symble@PLT); \
add $r15, $r15, reg; \
jral $r15;
#else
#define jmp(reg, symble) jal symble
#endif
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