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/* target operations in the Dyninst mode
* Copyright (C) 2012, 2016 Red Hat Inc.
*
* This file is part of systemtap, and is free software. You can
* redistribute it and/or modify it under the terms of the GNU General
* Public License (GPL); either version 2, or (at your option) any
* later version.
*/
#ifndef _STAPDYN_LOC2C_RUNTIME_H_
#define _STAPDYN_LOC2C_RUNTIME_H_
#include "../loc2c-runtime.h"
#define __get_user_asm(x, addr, err, itype, rtype, ltype, errret) \
(err) = __get_user((x), (typeof(x)*)(uintptr_t)(addr))
#define __put_user_asm(x, addr, err, itype, rtype, ltype, errret) \
(err) = __put_user((x), (typeof(x)*)(uintptr_t)(addr))
#define u_fetch_register(regno) \
pt_regs_fetch_register(c->uregs, regno)
#define u_store_register(regno, value) \
pt_regs_store_register(c->uregs, regno, value)
#if defined(__i386__)
// The kernel's way of getting esp doesn't work as an lvalue
#undef pt_dwarf_register_4
#define pt_dwarf_register_4(regs) regs->esp
#endif
#define _stp_deref_nofault(value, size, addr, seg) \
__copy_from_user((void *)&(value), (void *)(addr), (size_t)(size))
#define uread(ptr) ({ \
typeof(*(ptr)) _v = 0; \
if (__copy_from_user((void *)&_v, (void *)(ptr), sizeof(*(ptr)))) \
DEREF_FAULT(ptr); \
_v; \
})
#define uwrite(ptr, value) ({ \
typeof(*(ptr)) _v; \
_v = (typeof(*(ptr)))(value); \
if (__copy_to_user((void *)(ptr), (void *)&_v, sizeof(*(ptr)))) \
STORE_DEREF_FAULT(ptr); \
})
#define uderef(size, addr) ({ \
intptr_t _i = 0; \
switch (size) { \
case 1: _i = uread((u8 *)(uintptr_t)(addr)); break; \
case 2: _i = uread((u16 *)(uintptr_t)(addr)); break; \
case 4: _i = uread((u32 *)(uintptr_t)(addr)); break; \
case 8: _i = uread((u64 *)(uintptr_t)(addr)); break; \
default: __get_user_bad(); \
} \
_i; \
})
#define store_uderef(size, addr, value) ({ \
switch (size) { \
case 1: uwrite((u8 *)(uintptr_t)(addr), (value)); break; \
case 2: uwrite((u16 *)(uintptr_t)(addr), (value)); break; \
case 4: uwrite((u32 *)(uintptr_t)(addr), (value)); break; \
case 8: uwrite((u64 *)(uintptr_t)(addr), (value)); break; \
default: __put_user_bad(); \
} \
})
/* We still need to clean the runtime more before these can go away... */
#define kread uread
#define kwrite uwrite
#define kderef uderef
#define store_kderef store_uderef
#define stp_mem_access_begin(type, ptr, size, oldfs, seg, is_user_ptr)
#define stp_mem_access_end(oldfs, is_user)
#define stp_user_access_begin(type, ptr, size, oldfs, seg)
#define stp_user_access_end(oldfs)
#endif /* _STAPDYN_LOC2C_RUNTIME_H_ */
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