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/*
* Copyright (C) 2006 Giridhar Pemmasani
*
* This program 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 2 of the License, or
* (at your option) any later version.
*
* This program 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.
*
*/
#ifdef CONFIG_X86_64
/* Windows functions must have 32 bytes of shadow space for arguments
* above return address, irrespective of number of args. So argc >= 4
*/
#define alloc_win_stack_frame(argc) \
"sub $(" #argc "+1)*8, %%rsp\n\t"
#define free_win_stack_frame(argc) \
"add $(" #argc "+1)*8, %%rsp\n\t"
/* m is index of Windows arg required; Windows arg 1 should be at
* 0(%rsp), arg 2 at 8(%rsp) and so on after the frame is allocated.
*/
#define lin2win_win_arg(m) "(" #m "-1)*8(%%rsp)"
/* args for Windows function must be in clobber / output list */
#define outputs() \
"=a" (_ret), "=c" (_dummy), "=d" (_dummy), \
"=r" (r8), "=r" (r9), "=r" (r10), "=r" (r11)
#define clobbers() "cc"
#define LIN2WIN0(func) \
({ \
u64 _ret, _dummy; \
register u64 r8 __asm__("r8"); \
register u64 r9 __asm__("r9"); \
register u64 r10 __asm__("r10"); \
register u64 r11 __asm__("r11"); \
__asm__ __volatile__( \
alloc_win_stack_frame(4) \
"callq *%[fptr]\n\t" \
free_win_stack_frame(4) \
: outputs() \
: [fptr] "r" (func) \
: clobbers()); \
_ret; \
})
#define LIN2WIN1(func, arg1) \
({ \
u64 _ret, _dummy; \
register u64 r8 __asm__("r8"); \
register u64 r9 __asm__("r9"); \
register u64 r10 __asm__("r10"); \
register u64 r11 __asm__("r11"); \
__asm__ __volatile__( \
alloc_win_stack_frame(4) \
"callq *%[fptr]\n\t" \
free_win_stack_frame(4) \
: outputs() \
: "c" (arg1), [fptr] "r" (func) \
: clobbers()); \
_ret; \
})
#define LIN2WIN2(func, arg1, arg2) \
({ \
u64 _ret, _dummy; \
register u64 r8 __asm__("r8"); \
register u64 r9 __asm__("r9"); \
register u64 r10 __asm__("r10"); \
register u64 r11 __asm__("r11"); \
__asm__ __volatile__( \
alloc_win_stack_frame(4) \
"callq *%[fptr]\n\t" \
free_win_stack_frame(4) \
: outputs() \
: "c" (arg1), "d" (arg2), [fptr] "r" (func) \
: clobbers()); \
_ret; \
})
#define LIN2WIN3(func, arg1, arg2, arg3) \
({ \
u64 _ret, _dummy; \
register u64 r8 __asm__("r8") = (u64)arg3; \
register u64 r9 __asm__("r9"); \
register u64 r10 __asm__("r10"); \
register u64 r11 __asm__("r11"); \
__asm__ __volatile__( \
alloc_win_stack_frame(4) \
"callq *%[fptr]\n\t" \
free_win_stack_frame(4) \
: outputs() \
: "c" (arg1), "d" (arg2), "r" (r8), \
[fptr] "r" (func) \
: clobbers()); \
_ret; \
})
#define LIN2WIN4(func, arg1, arg2, arg3, arg4) \
({ \
u64 _ret, _dummy; \
register u64 r8 __asm__("r8") = (u64)arg3; \
register u64 r9 __asm__("r9") = (u64)arg4; \
register u64 r10 __asm__("r10"); \
register u64 r11 __asm__("r11"); \
__asm__ __volatile__( \
alloc_win_stack_frame(4) \
"callq *%[fptr]\n\t" \
free_win_stack_frame(4) \
: outputs() \
: "c" (arg1), "d" (arg2), "r" (r8), "r" (r9), \
[fptr] "r" (func) \
: clobbers()); \
_ret; \
})
#define LIN2WIN5(func, arg1, arg2, arg3, arg4, arg5) \
({ \
u64 _ret, _dummy; \
register u64 r8 __asm__("r8") = (u64)arg3; \
register u64 r9 __asm__("r9") = (u64)arg4; \
register u64 r10 __asm__("r10"); \
register u64 r11 __asm__("r11"); \
__asm__ __volatile__( \
alloc_win_stack_frame(5) \
"movq %[rarg5], " lin2win_win_arg(5) "\n\t" \
"callq *%[fptr]\n\t" \
free_win_stack_frame(5) \
: outputs() \
: "c" (arg1), "d" (arg2), "r" (r8), "r" (r9), \
[rarg5] "ri" ((u64)arg5), \
[fptr] "r" (func) \
: clobbers()); \
_ret; \
})
#define LIN2WIN6(func, arg1, arg2, arg3, arg4, arg5, arg6) \
({ \
u64 _ret, _dummy; \
register u64 r8 __asm__("r8") = (u64)arg3; \
register u64 r9 __asm__("r9") = (u64)arg4; \
register u64 r10 __asm__("r10"); \
register u64 r11 __asm__("r11"); \
__asm__ __volatile__( \
alloc_win_stack_frame(6) \
"movq %[rarg5], " lin2win_win_arg(5) "\n\t" \
"movq %[rarg6], " lin2win_win_arg(6) "\n\t" \
"callq *%[fptr]\n\t" \
free_win_stack_frame(6) \
: outputs() \
: "c" (arg1), "d" (arg2), "r" (r8), "r" (r9), \
[rarg5] "ri" ((u64)arg5), [rarg6] "ri" ((u64)arg6), \
[fptr] "r" (func) \
: clobbers()); \
_ret; \
})
#else // CONFIG_X86_64
#define LIN2WIN1(func, arg1) \
({ \
TRACE6("calling %p", func); \
func(arg1); \
})
#define LIN2WIN2(func, arg1, arg2) \
({ \
TRACE6("calling %p", func); \
func(arg1, arg2); \
})
#define LIN2WIN3(func, arg1, arg2, arg3) \
({ \
TRACE6("calling %p", func); \
func(arg1, arg2, arg3); \
})
#define LIN2WIN4(func, arg1, arg2, arg3, arg4) \
({ \
TRACE6("calling %p", func); \
func(arg1, arg2, arg3, arg4); \
})
#define LIN2WIN5(func, arg1, arg2, arg3, arg4, arg5) \
({ \
TRACE6("calling %p", func); \
func(arg1, arg2, arg3, arg4, arg5); \
})
#define LIN2WIN6(func, arg1, arg2, arg3, arg4, arg5, arg6) \
({ \
TRACE6("calling %p", func); \
func(arg1, arg2, arg3, arg4, arg5, arg6); \
})
#endif // CONFIG_X86_64
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