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grub/include/grub/compiler-rt.h
Vladimir Serbinenko 064360e667 Remove libgcc dependency. 
libgcc for boot environment isn't always present and compatible.
libgcc is often absent if endianness or bit-size at boot is different
from running OS.
libgcc may use optimised opcodes that aren't available on boot time.
So instead of relying on libgcc shipped with the compiler, supply
the functions in GRUB directly.
Tests are present to ensure that those replacement functions behave the
way compiler expects them to.
2015-03-03 20:50:37 +01:00

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5.7 KiB
C
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/* compiler-rt.h - prototypes for compiler helpers. */
/*
* GRUB -- GRand Unified Bootloader
* Copyright (C) 2002,2003,2005,2006,2007,2008,2009,2010-2014 Free Software Foundation, Inc.
*
* GRUB is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* GRUB 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with GRUB. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef GRUB_COMPILER_RT_HEADER
#define GRUB_COMPILER_RT_HEADER 1
#include <stdarg.h>
#include <grub/types.h>
#include <grub/symbol.h>
#include <grub/misc.h>
#if defined(GRUB_DIVISION_IN_SOFTWARE) && GRUB_DIVISION_IN_SOFTWARE
grub_uint32_t
EXPORT_FUNC (__udivsi3) (grub_uint32_t a, grub_uint32_t b);
grub_uint32_t
EXPORT_FUNC (__umodsi3) (grub_uint32_t a, grub_uint32_t b);
grub_int32_t
EXPORT_FUNC (__divsi3) (grub_int32_t a, grub_int32_t b);
grub_int32_t
EXPORT_FUNC (__modsi3) (grub_int32_t a, grub_int32_t b);
grub_int64_t
EXPORT_FUNC (__divdi3) (grub_int64_t a, grub_int64_t b);
grub_int64_t
EXPORT_FUNC (__moddi3) (grub_int64_t a, grub_int64_t b);
grub_uint64_t
EXPORT_FUNC (__udivdi3) (grub_uint64_t a, grub_uint64_t b);
grub_uint64_t
EXPORT_FUNC (__umoddi3) (grub_uint64_t a, grub_uint64_t b);
#endif
#if defined (__sparc__) || defined (__powerpc__) || defined (__mips__) || defined (__arm__)
unsigned
EXPORT_FUNC (__ctzdi2) (grub_uint64_t x);
#define NEED_CTZDI2 1
#endif
#if defined (__mips__) || defined (__arm__)
unsigned
EXPORT_FUNC (__ctzsi2) (grub_uint32_t x);
#define NEED_CTZSI2 1
#endif
#ifdef __arm__
grub_uint32_t
EXPORT_FUNC (__aeabi_uidiv) (grub_uint32_t a, grub_uint32_t b);
grub_uint32_t
EXPORT_FUNC (__aeabi_uidivmod) (grub_uint32_t a, grub_uint32_t b);
grub_int32_t
EXPORT_FUNC (__aeabi_idiv) (grub_int32_t a, grub_int32_t b);
grub_int32_t
EXPORT_FUNC (__aeabi_idivmod) (grub_int32_t a, grub_int32_t b);
int
EXPORT_FUNC (__aeabi_ulcmp) (grub_uint64_t a, grub_uint64_t b);
/* Needed for allowing modules to be compiled as thumb. */
grub_uint64_t
EXPORT_FUNC (__muldi3) (grub_uint64_t a, grub_uint64_t b);
grub_uint64_t
EXPORT_FUNC (__aeabi_lmul) (grub_uint64_t a, grub_uint64_t b);
void *
EXPORT_FUNC (__aeabi_memcpy) (void *dest, const void *src, grub_size_t n);
void *
EXPORT_FUNC(__aeabi_memset) (void *s, int c, grub_size_t n);
grub_uint64_t
EXPORT_FUNC (__aeabi_lasr) (grub_uint64_t u, int b);
grub_uint64_t
EXPORT_FUNC (__aeabi_llsl) (grub_uint64_t u, int b);
grub_uint64_t
EXPORT_FUNC (__aeabi_llsr) (grub_uint64_t u, int b);
#endif
#if defined (__powerpc__)
void EXPORT_FUNC (_restgpr_14_x) (void);
void EXPORT_FUNC (_restgpr_15_x) (void);
void EXPORT_FUNC (_restgpr_16_x) (void);
void EXPORT_FUNC (_restgpr_17_x) (void);
void EXPORT_FUNC (_restgpr_18_x) (void);
void EXPORT_FUNC (_restgpr_19_x) (void);
void EXPORT_FUNC (_restgpr_20_x) (void);
void EXPORT_FUNC (_restgpr_21_x) (void);
void EXPORT_FUNC (_restgpr_22_x) (void);
void EXPORT_FUNC (_restgpr_23_x) (void);
void EXPORT_FUNC (_restgpr_24_x) (void);
void EXPORT_FUNC (_restgpr_25_x) (void);
void EXPORT_FUNC (_restgpr_26_x) (void);
void EXPORT_FUNC (_restgpr_27_x) (void);
void EXPORT_FUNC (_restgpr_28_x) (void);
void EXPORT_FUNC (_restgpr_29_x) (void);
void EXPORT_FUNC (_restgpr_30_x) (void);
void EXPORT_FUNC (_restgpr_31_x) (void);
void EXPORT_FUNC (_savegpr_14) (void);
void EXPORT_FUNC (_savegpr_15) (void);
void EXPORT_FUNC (_savegpr_16) (void);
void EXPORT_FUNC (_savegpr_17) (void);
void EXPORT_FUNC (_savegpr_18) (void);
void EXPORT_FUNC (_savegpr_19) (void);
void EXPORT_FUNC (_savegpr_20) (void);
void EXPORT_FUNC (_savegpr_21) (void);
void EXPORT_FUNC (_savegpr_22) (void);
void EXPORT_FUNC (_savegpr_23) (void);
void EXPORT_FUNC (_savegpr_24) (void);
void EXPORT_FUNC (_savegpr_25) (void);
void EXPORT_FUNC (_savegpr_26) (void);
void EXPORT_FUNC (_savegpr_27) (void);
void EXPORT_FUNC (_savegpr_28) (void);
void EXPORT_FUNC (_savegpr_29) (void);
void EXPORT_FUNC (_savegpr_30) (void);
void EXPORT_FUNC (_savegpr_31) (void);
#endif
#if defined (__powerpc__) || defined(__mips__) || defined (__arm__)
int
EXPORT_FUNC(__ucmpdi2) (grub_uint64_t a, grub_uint64_t b);
grub_uint64_t
EXPORT_FUNC(__ashldi3) (grub_uint64_t u, int b);
grub_uint64_t
EXPORT_FUNC(__ashrdi3) (grub_uint64_t u, int b);
grub_uint64_t
EXPORT_FUNC (__lshrdi3) (grub_uint64_t u, int b);
#endif
#if defined (__powerpc__) || defined(__mips__) || defined(__sparc__) || defined (__arm__)
grub_uint32_t
EXPORT_FUNC(__bswapsi2) (grub_uint32_t u);
grub_uint64_t
EXPORT_FUNC(__bswapdi2) (grub_uint64_t u);
#endif
#if defined (__APPLE__) && defined(__i386__)
#define GRUB_BUILTIN_ATTR __attribute__ ((regparm(0)))
#else
#define GRUB_BUILTIN_ATTR
#endif
/* Prototypes for aliases. */
int GRUB_BUILTIN_ATTR EXPORT_FUNC(memcmp) (const void *s1, const void *s2, grub_size_t n);
void *GRUB_BUILTIN_ATTR EXPORT_FUNC(memmove) (void *dest, const void *src, grub_size_t n);
void *GRUB_BUILTIN_ATTR EXPORT_FUNC(memcpy) (void *dest, const void *src, grub_size_t n);
void *GRUB_BUILTIN_ATTR EXPORT_FUNC(memset) (void *s, int c, grub_size_t n);
#ifdef __APPLE__
void GRUB_BUILTIN_ATTR EXPORT_FUNC (__bzero) (void *s, grub_size_t n);
#endif
#if defined (__MINGW32__) || defined (__CYGWIN__)
void EXPORT_FUNC (__register_frame_info) (void);
void EXPORT_FUNC (__deregister_frame_info) (void);
void EXPORT_FUNC (___chkstk_ms) (void);
void EXPORT_FUNC (__chkstk_ms) (void);
#endif
#endif
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