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- /*
- * 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;
- }
- }
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