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/*
* Copyright (C) 2004 PathScale, Inc
* Licensed under the GPL
*/
#include <errno.h>
#include <string.h>
#include "ptrace_user.h"
#include "uml-config.h"
#include "skas_ptregs.h"
#include "registers.h"
#include "user.h"
/* These are set once at boot time and not changed thereafter */
static unsigned long exec_regs[HOST_FRAME_SIZE];
static unsigned long exec_fp_regs[HOST_FP_SIZE];
void init_thread_registers(union uml_pt_regs *to)
{
memcpy(to->skas.regs, exec_regs, sizeof(to->skas.regs));
memcpy(to->skas.fp, exec_fp_regs, sizeof(to->skas.fp));
}
static int move_registers(int pid, int int_op, int fp_op,
union uml_pt_regs *regs)
{
if(ptrace(int_op, pid, 0, regs->skas.regs) < 0)
return(-errno);
if(ptrace(fp_op, pid, 0, regs->skas.fp) < 0)
return(-errno);
return(0);
}
void save_registers(int pid, union uml_pt_regs *regs)
{
int err;
err = move_registers(pid, PTRACE_GETREGS, PTRACE_GETFPREGS, regs);
if(err)
panic("save_registers - saving registers failed, errno = %d\n",
-err);
}
void restore_registers(int pid, union uml_pt_regs *regs)
{
int err;
err = move_registers(pid, PTRACE_SETREGS, PTRACE_SETFPREGS, regs);
if(err)
panic("restore_registers - saving registers failed, "
"errno = %d\n", -err);
}
void init_registers(int pid)
{
int err;
err = ptrace(PTRACE_GETREGS, pid, 0, exec_regs);
if(err)
panic("check_ptrace : PTRACE_GETREGS failed, errno = %d",
err);
err = ptrace(PTRACE_GETFPREGS, pid, 0, exec_fp_regs);
if(err)
panic("check_ptrace : PTRACE_GETFPREGS failed, errno = %d",
err);
}
void get_safe_registers(unsigned long *regs)
{
memcpy(regs, exec_regs, HOST_FRAME_SIZE * sizeof(unsigned long));
}
/*
* Overrides for Emacs so that we follow Linus's tabbing style.
* Emacs will notice this stuff at the end of the file and automatically
* adjust the settings for this buffer only. This must remain at the end
* of the file.
* ---------------------------------------------------------------------------
* Local variables:
* c-file-style: "linux"
* End:
*/
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