3 * The Regents of the University of California. All rights reserved.
4 * Copyright (c) 1993 Jan-Simon Pendry
6 * This code is derived from software contributed to Berkeley by
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33 * @(#)procfs_machdep.c 8.3 (Berkeley) 1/27/94
36 * $FreeBSD: src/sys/i386/i386/procfs_machdep.c,v 1.14 1999/10/11 14:50:03 peter Exp $
37 * $DragonFly: src/sys/platform/pc64/amd64/procfs_machdep.c,v 1.2 2007/09/24 03:24:45 yanyh Exp $
41 * Functions to be implemented here are:
43 * procfs_read_regs(lwp, regs)
44 * Get the current user-visible register set from the process
45 * and copy it into the regs structure (<machine/reg.h>).
46 * The process is stopped at the time read_regs is called.
48 * procfs_write_regs(lwp, regs)
49 * Update the current register set from the passed in regs
50 * structure. Take care to avoid clobbering special CPU
51 * registers or privileged bits in the PSL.
52 * Depending on the architecture this may have fix-up work to do,
53 * especially if the IAR or PCW are modified.
54 * The process is stopped at the time write_regs is called.
56 * procfs_read_fpregs, procfs_write_fpregs
57 * deal with the floating point register set, otherwise as above.
59 * procfs_read_dbregs, procfs_write_dbregs
60 * deal with the processor debug register set, otherwise as above.
63 * Arrange for the process to trap after executing a single instruction.
67 #include <sys/param.h>
69 #include <sys/ptrace.h>
70 #include <sys/vnode.h>
72 #include <machine/md_var.h>
73 #include <vfs/procfs/procfs.h>
78 #include <vm/vm_map.h>
81 procfs_read_regs(struct lwp *lp, struct reg *regs)
83 return (fill_regs(lp, regs));
87 procfs_write_regs(struct lwp *lp, struct reg *regs)
89 return (set_regs(lp, regs));
93 procfs_read_dbregs(struct lwp *lp, struct dbreg *dbregs)
95 return (fill_dbregs(lp, dbregs));
99 procfs_write_dbregs(struct lwp *lp, struct dbreg *dbregs)
101 return (set_dbregs(lp, dbregs));
105 * Ptrace doesn't support fpregs at all, and there are no security holes
106 * or translations for fpregs, so we can just copy them.
110 procfs_read_fpregs(struct lwp *lp, struct fpreg *fpregs)
112 return (fill_fpregs(lp, fpregs));
116 procfs_write_fpregs(struct lwp *lp, struct fpreg *fpregs)
118 return (set_fpregs(lp, fpregs));
122 procfs_sstep(struct lwp *lp)
124 return (ptrace_single_step(lp));