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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.
*/
#ifndef _LINUX_NDS32_SYSDEP_H
#define _LINUX_NDS32_SYSDEP_H 1
#include <common/sysdep.h>
#ifdef __ASSEMBLER__
/* Define an entry point visible from C. */
# ifdef PIC
# define ENTRY(name) \
.pic \
.align 2; \
.globl C_SYMBOL_NAME(name); \
.func C_SYMBOL_NAME(name); \
.type C_SYMBOL_NAME(name), @function; \
C_SYMBOL_NAME(name): \
cfi_startproc;
# else
# define ENTRY(name) \
.align 2; \
.globl C_SYMBOL_NAME(name); \
.func C_SYMBOL_NAME(name); \
.type C_SYMBOL_NAME(name), @function; \
C_SYMBOL_NAME(name): \
cfi_startproc;
# endif
#undef END
#define END(name) \
cfi_endproc; \
.endfunc; \
.size C_SYMBOL_NAME(name), .-C_SYMBOL_NAME(name)
/* If compiled for profiling, call `mcount' at the start of each function. */
# ifdef HAVE_ELF
#undef NO_UNDERSCORES
#define NO_UNDERSCORES
# endif
# ifdef NO_UNDERSCORES
#define syscall_error __syscall_error
# endif
#define SYS_ify(syscall_name) (__NR_##syscall_name)
#define __do_syscall(syscall_name) \
syscall SYS_ify(syscall_name);
# ifdef PIC
# define PSEUDO(name, syscall_name, args) \
.pic; \
.align 2; \
99: mfusr $r15, $PC; \
sethi $r1, hi20(_GLOBAL_OFFSET_TABLE_ + 4); \
ori $r1, $r1, lo12(_GLOBAL_OFFSET_TABLE_ + 8); \
add $r1, $r15, $r1; \
sethi $r15, hi20(SYSCALL_ERROR@PLT); \
ori $r15, $r15, lo12(SYSCALL_ERROR@PLT); \
add $r15, $r15, $r1; \
jr $r15; \
nop; \
ENTRY(name); \
__do_syscall(syscall_name); \
bgez $r0, 2f; \
sltsi $r1, $r0, -4096; \
beqz $r1, 99b; \
2:
# else
# define PSEUDO(name, syscall_name, args) \
.align 2; \
99: j SYSCALL_ERROR; \
nop; \
ENTRY(name); \
__do_syscall(syscall_name); \
bgez $r0, 2f; \
sltsi $r1, $r0, -4096; \
beqz $r1, 99b; \
2:
# endif
#define PSEUDO_NOERRNO(name, syscall_name, args) \
ENTRY(name); \
__do_syscall(syscall_name);
#undef PSEUDO_END
#define PSEUDO_END(sym) \
SYSCALL_ERROR_HANDLER \
END(sym)
#undef PSEUDO_END_ERRVAL
#define PSEUDO_END_ERRVAL(sym) END(sym)
#define PSEUDO_ERRVAL(name, syscall_name, args) PSEUDO_NOERRNO(name, syscall_name, args)
#define ret_ERRVAL ret
#define ret_NOERRNO ret
#if defined NOT_IN_libc
#define SYSCALL_ERROR __local_syscall_error
#ifdef PIC
#define SYSCALL_ERROR_HANDLER \
__local_syscall_error: \
pushm $gp, $lp; \
cfi_adjust_cfa_offset(8) \
cfi_rel_offset(gp, 0) \
cfi_rel_offset(lp, 4) \
mfusr $r15, $PC; \
sethi $gp, hi20(_GLOBAL_OFFSET_TABLE_+4); \
ori $gp, $gp, lo12(_GLOBAL_OFFSET_TABLE_+8); \
add $gp, $gp, $r15; \
neg $r0, $r0; \
push $r0; \
cfi_adjust_cfa_offset(4) \
cfi_rel_offset(r0, 0) \
addi $sp, $sp, -4; \
bal C_SYMBOL_NAME(__errno_location@PLT); \
addi $sp, $sp, 4; \
pop $r1; \
cfi_adjust_cfa_offset(-4); \
cfi_restore(r1); \
swi $r1, [$r0]; \
li $r0, -1; \
popm $gp, $lp; \
cfi_adjust_cfa_offset(-8); \
cfi_restore(lp); \
cfi_restore(gp); \
1: ret;
#else
#define SYSCALL_ERROR_HANDLER \
__local_syscall_error: \
push $lp; \
cfi_adjust_cfa_offset(4) \
cfi_rel_offset(lp, 0) \
neg $r0, $r0; \
push $r0; \
cfi_adjust_cfa_offset(4) \
cfi_rel_offset(r0, 0) \
addi $sp, $sp, -4; \
bal C_SYMBOL_NAME(__errno_location); \
addi $sp, $sp, 4; \
pop $r1; \
cfi_adjust_cfa_offset(-4); \
cfi_restore(r1); \
swi $r1, [$r0]; \
li $r0, -1; \
pop $lp; \
cfi_adjust_cfa_offset(-4); \
cfi_restore(lp); \
ret;
#endif
#else
#define SYSCALL_ERROR_HANDLER
#define SYSCALL_ERROR __syscall_error
#endif
#endif /* __ASSEMBLER__ */
#endif //_LINUX_NDS32_SYSDEP_H
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