https://github.com/torvalds/linux
- HEAD
- refs/heads/arm64-uaccess
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/certifi-2024.7.4
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/idna-3.7
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/requests-2.32.2
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/setuptools-70.0.0
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/urllib3-2.2.2
- refs/heads/master
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Tip revision: b787f68c36d49bb1d9236f403813641efa74a031 authored by Linus Torvalds on 27 April 2015, 00:59:10 UTC
Linux 4.1-rc1
Linux 4.1-rc1
Tip revision: b787f68
registers.c
/*
* Copyright (C) 2004 PathScale, Inc
* Copyright (C) 2004 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
* Licensed under the GPL
*/
#include <errno.h>
#include <sys/ptrace.h>
#ifdef __i386__
#include <sys/user.h>
#endif
#include <longjmp.h>
#include <sysdep/ptrace_user.h>
int save_fp_registers(int pid, unsigned long *fp_regs)
{
if (ptrace(PTRACE_GETFPREGS, pid, 0, fp_regs) < 0)
return -errno;
return 0;
}
int restore_fp_registers(int pid, unsigned long *fp_regs)
{
if (ptrace(PTRACE_SETFPREGS, pid, 0, fp_regs) < 0)
return -errno;
return 0;
}
#ifdef __i386__
int have_fpx_regs = 1;
int save_fpx_registers(int pid, unsigned long *fp_regs)
{
if (ptrace(PTRACE_GETFPXREGS, pid, 0, fp_regs) < 0)
return -errno;
return 0;
}
int restore_fpx_registers(int pid, unsigned long *fp_regs)
{
if (ptrace(PTRACE_SETFPXREGS, pid, 0, fp_regs) < 0)
return -errno;
return 0;
}
int get_fp_registers(int pid, unsigned long *regs)
{
if (have_fpx_regs)
return save_fpx_registers(pid, regs);
else
return save_fp_registers(pid, regs);
}
int put_fp_registers(int pid, unsigned long *regs)
{
if (have_fpx_regs)
return restore_fpx_registers(pid, regs);
else
return restore_fp_registers(pid, regs);
}
void arch_init_registers(int pid)
{
struct user_fpxregs_struct fpx_regs;
int err;
err = ptrace(PTRACE_GETFPXREGS, pid, 0, &fpx_regs);
if (!err)
return;
if (errno != EIO)
panic("check_ptrace : PTRACE_GETFPXREGS failed, errno = %d",
errno);
have_fpx_regs = 0;
}
#else
int get_fp_registers(int pid, unsigned long *regs)
{
return save_fp_registers(pid, regs);
}
int put_fp_registers(int pid, unsigned long *regs)
{
return restore_fp_registers(pid, regs);
}
#endif
unsigned long get_thread_reg(int reg, jmp_buf *buf)
{
switch (reg) {
#ifdef __i386__
case HOST_IP:
return buf[0]->__eip;
case HOST_SP:
return buf[0]->__esp;
case HOST_BP:
return buf[0]->__ebp;
#else
case HOST_IP:
return buf[0]->__rip;
case HOST_SP:
return buf[0]->__rsp;
case HOST_BP:
return buf[0]->__rbp;
#endif
default:
printk(UM_KERN_ERR "get_thread_regs - unknown register %d\n",
reg);
return 0;
}
}