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// -*- mode: c++ -*-
// Copyright 2012 The Rust Project Developers. See the COPYRIGHT
// file at the top-level directory of this distribution and at
// http://rust-lang.org/COPYRIGHT.
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.
#ifndef CONTEXT_H
#define CONTEXT_H
#include <cstdlib>
#include <inttypes.h>
#include <stdint.h>
#include "vg/memcheck.h"
template<typename T>
T align_down(T sp)
{
// There is no platform we care about that needs more than a
// 16-byte alignment.
return (T)((uint32_t)sp & ~(16 - 1));
}
struct registers_t {
// general purpose registers
uint32_t eax, ebx, ecx, edx, ebp, esi, edi, esp;
// segment registers
uint16_t cs, ds, ss, es, fs, gs;
uint32_t eflags;
uint32_t eip;
} __attribute__((aligned(16)));
class context {
public:
registers_t regs;
context();
context *next;
void swap(context &out);
void call(void *f, void *arg, void *sp);
};
#endif
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