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Redirect all divisions to grub_divmod64.

This commit is contained in:
Vladimir Serbinenko 2013-11-13 00:53:53 +01:00
parent f649a6a8fd
commit 16057d6bbb
6 changed files with 97 additions and 29 deletions
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4
ChangeLog
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@ -1,3 +1,7 @@
2013-11-12 Vladimir Serbinenko <phcoder@gmail.com>
Redirect all divisions to grub_divmod64.
2013-11-12 Vladimir Serbinenko <phcoder@gmail.com>
* grub-core/term/tparm.c (tparam_internal): Use unsigned divisions.

2
configure.ac
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@ -831,7 +831,7 @@ CFLAGS="$TARGET_CFLAGS -Wl,--defsym,abort=main"
fi
# Check for libgcc symbols
AC_CHECK_FUNCS(__bswapsi2 __bswapdi2 __ashldi3 __ashrdi3 __lshrdi3 __ucmpdi2 _restgpr_14_x __udivsi3 __umoddi3 __udivdi3 __divsi3 __modsi3 __umodsi3 __moddi3 __divdi3 __ctzdi2 __ctzsi2)
AC_CHECK_FUNCS(__bswapsi2 __bswapdi2 __ashldi3 __ashrdi3 __lshrdi3 __ucmpdi2 _restgpr_14_x __ctzdi2 __ctzsi2)
if test "x$TARGET_APPLE_CC" = x1 ; then
CFLAGS="$TARGET_CFLAGS -nostdlib"

20
grub-core/kern/arm/misc.S
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@ -30,6 +30,26 @@
.align 2
.macro division parent
stmfd sp!, {lr}
sub sp, sp, #12
mov r2, r1
add r1, sp, #4
str r1, [sp, #0]
mov r1, #0
mov r3, #0
bl \parent
ldr r1, [sp, #4]
add sp, sp, #12
ldmfd sp!, {lr}
bx lr
.endm
FUNCTION(__aeabi_uidivmod)
division grub_divmod64
/*
* Null divide-by-zero handler
*/

43
grub-core/kern/misc.c
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@ -596,6 +596,49 @@ grub_divmod64 (grub_uint64_t n, grub_uint64_t d, grub_uint64_t *r)
return q;
}
#if defined (__arm__)
grub_uint32_t
__udivsi3 (grub_uint32_t a, grub_uint32_t b)
{
return grub_divmod64 (a, b, 0);
}
grub_uint32_t
__umodsi3 (grub_uint32_t a, grub_uint32_t b)
{
grub_uint64_t ret;
grub_divmod64 (a, b, &ret);
return ret;
}
#endif
#ifdef __arm__
grub_uint32_t
__aeabi_uidiv (grub_uint32_t a, grub_uint32_t b)
__attribute__ ((alias ("__udivsi3")));
#endif
#if defined (__ia64__)
grub_uint64_t
__udivdi3 (grub_uint64_t a, grub_uint64_t b)
{
return grub_divmod64 (a, b, 0);
}
grub_uint64_t
__umoddi3 (grub_uint64_t a, grub_uint64_t b)
{
grub_uint64_t ret;
grub_divmod64 (a, b, &ret);
return ret;
}
#endif
/* Convert a long long value to a string. This function avoids 64-bit
modular arithmetic or divisions. */
static char *

28
include/grub/libgcc.h
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@ -42,30 +42,6 @@ void EXPORT_FUNC (__bswapsi2) (void);
# ifdef HAVE___BSWAPDI2
void EXPORT_FUNC (__bswapdi2) (void);
# endif
# ifdef HAVE___UDIVSI3
void EXPORT_FUNC (__udivsi3) (void);
# endif
# ifdef HAVE___UMODSI3
void EXPORT_FUNC (__umodsi3) (void);
# endif
# ifdef HAVE___UMODDI3
void EXPORT_FUNC (__umoddi3) (void);
# endif
# ifdef HAVE___UDIVDI3
void EXPORT_FUNC (__udivdi3) (void);
# endif
# ifdef HAVE___MODDI3
void EXPORT_FUNC (__moddi3) (void);
# endif
# ifdef HAVE___DIVDI3
void EXPORT_FUNC (__divdi3) (void);
# endif
# ifdef HAVE___DIVSI3
void EXPORT_FUNC (__divsi3) (void);
# endif
# ifdef HAVE___MODSI3
void EXPORT_FUNC (__modsi3) (void);
# endif
# ifdef HAVE___CTZDI2
void EXPORT_FUNC (__ctzdi2) (void);
# endif
@ -114,12 +90,8 @@ void EXPORT_FUNC (_savegpr_31) (void);
#endif
#if defined (__arm__)
void EXPORT_FUNC (__aeabi_idiv) (void);
void EXPORT_FUNC (__aeabi_idivmod) (void);
void EXPORT_FUNC (__aeabi_lasr) (void);
void EXPORT_FUNC (__aeabi_llsl) (void);
void EXPORT_FUNC (__aeabi_llsr) (void);
void EXPORT_FUNC (__aeabi_uidiv) (void);
void EXPORT_FUNC (__aeabi_uidivmod) (void);
void EXPORT_FUNC (__aeabi_ulcmp) (void);
#endif

29
include/grub/misc.h
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@ -453,6 +453,35 @@ grub_error_load (const struct grub_error_saved *save)
grub_errno = save->grub_errno;
}
#if defined (__arm__)
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);
#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);
#endif
#if defined (__ia64__)
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 BOOT_TIME_STATS
struct grub_boot_time
{