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/* Copyright (C) 1992,1993,1995-2000,2002-2006,2007,2008
Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper, <drepper@gnu.org>, August 1995.
OpenSolaris bits contributed by David Bartley
<dtbartle@csclub.uwaterloo.ca>, 2008.
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, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
#ifndef _OPENSOLARIS_I386_SYSDEP_H
#define _OPENSOLARIS_I386_SYSDEP_H 1
#define DECLARE_INLINE_SYSCALL(ret, name, args...) \
extern ret __syscall_##name (args)
/* There is some commonality. */
#include <sysdeps/unix/i386/sysdep.h>
#include <bp-sym.h>
#include <bp-asm.h>
#include <syscallP.h>
/* XXX: This needs to come before #include <tls.h>. */
/* Pointer mangling support. */
#if defined NOT_IN_libc && defined IS_IN_rtld
/* We cannot use the thread descriptor because in ld.so we use setjmp
earlier than the descriptor is initialized. Using a global variable
is too complicated here since we have no PC-relative addressing mode. */
#else
# ifdef __ASSEMBLER__
# define PTR_MANGLE(reg) xorl %gs:POINTER_GUARD, reg; \
roll $9, reg
# define PTR_DEMANGLE(reg) rorl $9, reg; \
xorl %gs:POINTER_GUARD, reg
# else
# define PTR_MANGLE(var) asm ("xorl %%gs:%c2, %0\n" \
"roll $9, %0" \
: "=r" (var) \
: "0" (var), \
"i" (offsetof (tcbhead_t, \
pointer_guard)))
# define PTR_DEMANGLE(var) asm ("rorl $9, %0\n" \
"xorl %%gs:%c2, %0" \
: "=r" (var) \
: "0" (var), \
"i" (offsetof (tcbhead_t, \
pointer_guard)))
# endif
#endif
/* Defines RTLD_PRIVATE_ERRNO and USE_DL_SYSINFO. */
#include <dl-sysdep.h>
#include <tls.h>
/* It's too much trouble to pull in all of errno.h just for this */
#ifndef ERESTART
# define ERESTART 91 /* Restartable system call. */
# define EINTR 4 /* Interrupted system call. */
#endif
#ifdef __ASSEMBLER__
/* This is needed so that we know when to set %edx to -1 on error. */
#ifdef SYSCALL_64BIT_RETURN
# define SYSCALL_64BIT_RETURN_ASM orl $-1, %edx;
#else
# define SYSCALL_64BIT_RETURN_ASM
#endif
#ifdef SYSCALL_RESTARTABLE
# define DO_RESTART \
cmpl $ERESTART, %eax; \
je L(restart);
#else
# define DO_RESTART
#endif
/* We don't want the label for the error handle to be global when we define
it here. */
#ifdef PIC
# define SYSCALL_ERROR_LABEL 0f
#else
# define SYSCALL_ERROR_LABEL syscall_error
#endif
#undef PSEUDO
#define PSEUDO(name, syscall_name, args) \
.text; \
ENTRY (name) \
L(restart): \
DO_CALL (syscall_name, args); \
jnb 2f; \
DO_RESTART \
jmp SYSCALL_ERROR_LABEL; \
2: \
L(pseudo_end):
#define PSEUDO_SUBCALL(name, syscall_name, subcall_name, args) \
.text; \
ENTRY (name) \
movl 0(%esp), %ecx; \
movl %ecx, -4(%esp); \
addl $-4, %esp; \
movl $SYS_ify (SUB_##subcall_name), 4(%esp); \
L(restart): \
DO_CALL (syscall_name, args); \
jnb 2f; \
DO_RESTART \
movl %ecx, 4(%esp); \
addl $4, %esp; \
jmp SYSCALL_ERROR_LABEL; \
2: \
movl %ecx, 4(%esp); \
addl $4, %esp; \
L(pseudo_end):
#undef PSEUDO_END
#define PSEUDO_END(name) \
SYSCALL_ERROR_HANDLER \
END (name)
#undef PSEUDO_NOERRNO
#define PSEUDO_NOERRNO(name, syscall_name, args) \
.text; \
ENTRY (name) \
DO_CALL (syscall_name, args)
#define PSEUDO_SUBCALL_NOERRNO(name, syscall_name, subcall_name, args) \
.text; \
ENTRY (name) \
movl 0(%esp), %ecx; \
movl %ecx, -4(%esp); \
addl $-4, %esp; \
movl $SYS_ify (SUB_##subcall_name), 4(%esp); \
DO_CALL (syscall_name, args); \
movl %ecx, 4(%esp); \
addl $4, %esp;
#undef PSEUDO_END_NOERRNO
#define PSEUDO_END_NOERRNO(name) \
END (name)
#define ret_NOERRNO ret
/* The function has to return the error code. */
#undef PSEUDO_ERRVAL
#define PSEUDO_ERRVAL(name, syscall_name, args) \
.text; \
ENTRY (name) \
DO_CALL (syscall_name, args); \
jnb 1f; \
cmpl $ERESTART, %eax; \
jne 2f; \
movl $EINTR, %eax; \
jmp 2f; \
1: xorl %eax, %eax; \
2:;
#define PSEUDO_SUBCALL_ERRVAL(name, syscall_name, subcall_name, args) \
.text; \
ENTRY (name) \
movl 0(%esp), %ecx; \
movl %ecx, -4(%esp); \
addl $-4, %esp; \
movl $SYS_ify (SUB_##subcall_name), 4(%esp); \
L(restart): \
DO_CALL (syscall_name, args); \
jnb 1f; \
cmpl $ERESTART, %eax; \
jne 2f; \
movl $EINTR, %eax; \
jmp 2f; \
1: xorl %eax, %eax; \
2: \
movl %ecx, 4(%esp); \
addl $4, %esp;
#undef PSEUDO_END_ERRVAL
#define PSEUDO_END_ERRVAL(name) \
END (name)
#define ret_ERRVAL ret
#undef PSEUDO_FASTTRAP
#define PSEUDO_FASTTRAP(name, trap_name, args) \
.text; \
ENTRY (name) \
movl $T_##trap_name, %eax; \
int $T_FASTTRAP; \
L(pseudo_end):
#ifndef PIC
# define SYSCALL_ERROR_HANDLER /* Nothing here; code in sysdep.S is used. */
#else
# if RTLD_PRIVATE_ERRNO
# define SYSCALL_ERROR_HANDLER \
0: SETUP_PIC_REG(cx); \
addl $_GLOBAL_OFFSET_TABLE_, %ecx; \
movl %eax, rtld_errno@GOTOFF(%ecx); \
orl $-1, %eax; \
SYSCALL_64BIT_RETURN_ASM \
jmp L(pseudo_end);
# elif defined _LIBC_REENTRANT
# if USE___THREAD
# ifndef NOT_IN_libc
# define SYSCALL_ERROR_ERRNO __libc_errno
# else
# define SYSCALL_ERROR_ERRNO errno
# endif
# define SYSCALL_ERROR_HANDLER \
0: SETUP_PIC_REG (cx); \
addl $_GLOBAL_OFFSET_TABLE_, %ecx; \
movl SYSCALL_ERROR_ERRNO@GOTNTPOFF(%ecx), %ecx; \
SYSCALL_ERROR_HANDLER_TLS_STORE (%eax, %ecx); \
orl $-1, %eax; \
SYSCALL_64BIT_RETURN_ASM \
jmp L(pseudo_end);
# ifndef NO_TLS_DIRECT_SEG_REFS
# define SYSCALL_ERROR_HANDLER_TLS_STORE(src, destoff) \
movl src, %gs:(destoff)
# else
# define SYSCALL_ERROR_HANDLER_TLS_STORE(src, destoff) \
addl %gs:0, destoff; \
movl src, (destoff)
# endif
# else
# define SYSCALL_ERROR_HANDLER \
0:pushl %ebx; \
cfi_adjust_cfa_offset (4); \
cfi_rel_offset (ebx, 0); \
SETUP_PIC_REG (bx); \
addl $_GLOBAL_OFFSET_TABLE_, %ebx; \
pushl %eax; \
cfi_adjust_cfa_offset (4); \
PUSH_ERRNO_LOCATION_RETURN; \
call BP_SYM (__errno_location)@PLT; \
POP_ERRNO_LOCATION_RETURN; \
popl %ecx; \
cfi_adjust_cfa_offset (-4); \
popl %ebx; \
cfi_adjust_cfa_offset (-4); \
cfi_restore (ebx); \
movl %ecx, (%eax); \
orl $-1, %eax; \
SYSCALL_64BIT_RETURN_ASM \
jmp L(pseudo_end);
/* A quick note: it is assumed that the call to `__errno_location' does
not modify the stack! */
# endif
# else
/* Store (%eax) into errno through the GOT. */
# define SYSCALL_ERROR_HANDLER \
0:SETUP_PIC_REG(cx); \
addl $_GLOBAL_OFFSET_TABLE_, %ecx; \
movl errno@GOT(%ecx), %ecx; \
movl %eax, (%ecx); \
orl $-1, %eax; \
SYSCALL_64BIT_RETURN_ASM \
jmp L(pseudo_end);
# endif /* _LIBC_REENTRANT */
#endif /* PIC */
/* TODO: use sysenter instead of int */
#undef DO_CALL
#define DO_CALL(syscall_name, args) \
movl $SYS_ify (syscall_name), %eax; \
int $0x91
#else /* !__ASSEMBLER__ */
/* Consistency check for position-independent code. */
#ifdef __PIC__
# define check_consistency() \
({ int __res; \
__asm__ __volatile__ \
("call __i686.get_pc_thunk.cx;" \
"addl $_GLOBAL_OFFSET_TABLE_, %%ecx;" \
"subl %%ebx, %%ecx;" \
"je 1f;" \
"ud2;" \
"1:\n" \
".section .gnu.linkonce.t.__i686.get_pc_thunk.cx,\"ax\",@progbits;" \
".globl __i686.get_pc_thunk.cx;" \
".hidden __i686.get_pc_thunk.cx;" \
".type __i686.get_pc_thunk.cx,@function;" \
"__i686.get_pc_thunk.cx:" \
"movl (%%esp), %%ecx;" \
"ret;" \
".previous" \
: "=c" (__res)); \
__res; })
#endif
/* TODO: This is a terrible implementation of INTERNAL_SYSCALL. */
/* Some NPTL code calls these macros. */
# include <errno.h>
# define INTERNAL_SYSCALL(name, err, nr, args...) __internal_##name##_##nr (&(err), args)
# define INTERNAL_SYSCALL_DECL(err) int err = 0;
# define INTERNAL_SYSCALL_ERROR_P(val, err) (err != 0)
# define INTERNAL_SYSCALL_ERRNO(val, err) (err)
#endif /* __ASSEMBLER__ */
#endif /* _OPENSOLARIS_I386_SYSDEP_H */
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