92 lines
1.8 KiB
C
92 lines
1.8 KiB
C
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/*
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* Copyright (C) 2004 PathScale, Inc
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* Copyright (C) 2004 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
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* Licensed under the GPL
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*/
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#include <errno.h>
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#include <sys/ptrace.h>
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#include <sys/user.h>
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#include "kern_constants.h"
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#include "longjmp.h"
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#include "user.h"
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#include "sysdep/ptrace_user.h"
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int save_fp_registers(int pid, unsigned long *fp_regs)
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{
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if (ptrace(PTRACE_GETFPREGS, pid, 0, fp_regs) < 0)
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return -errno;
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return 0;
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}
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int restore_fp_registers(int pid, unsigned long *fp_regs)
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{
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if (ptrace(PTRACE_SETFPREGS, pid, 0, fp_regs) < 0)
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return -errno;
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return 0;
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}
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int save_fpx_registers(int pid, unsigned long *fp_regs)
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{
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if (ptrace(PTRACE_GETFPXREGS, pid, 0, fp_regs) < 0)
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return -errno;
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return 0;
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}
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int restore_fpx_registers(int pid, unsigned long *fp_regs)
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{
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if (ptrace(PTRACE_SETFPXREGS, pid, 0, fp_regs) < 0)
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return -errno;
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return 0;
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}
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unsigned long get_thread_reg(int reg, jmp_buf *buf)
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{
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switch (reg) {
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case EIP:
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return buf[0]->__eip;
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case UESP:
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return buf[0]->__esp;
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case EBP:
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return buf[0]->__ebp;
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default:
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printk(UM_KERN_ERR "get_thread_regs - unknown register %d\n",
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reg);
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return 0;
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}
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}
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int have_fpx_regs = 1;
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int get_fp_registers(int pid, unsigned long *regs)
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{
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if (have_fpx_regs)
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return save_fpx_registers(pid, regs);
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else
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return save_fp_registers(pid, regs);
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}
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int put_fp_registers(int pid, unsigned long *regs)
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{
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if (have_fpx_regs)
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return restore_fpx_registers(pid, regs);
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else
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return restore_fp_registers(pid, regs);
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}
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void arch_init_registers(int pid)
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{
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struct user_fpxregs_struct fpx_regs;
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int err;
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err = ptrace(PTRACE_GETFPXREGS, pid, 0, &fpx_regs);
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if (!err)
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return;
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if (errno != EIO)
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panic("check_ptrace : PTRACE_GETFPXREGS failed, errno = %d",
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errno);
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have_fpx_regs = 0;
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}
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