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// -*- mode: c++ -*-
#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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