18badddaa8
Before the removal of tt mode, access to a register on the skas-mode side of a pt_regs struct looked like pt_regs.regs.skas.regs.regs[FOO]. This was bad enough, but it became pt_regs.regs.regs.regs[FOO] with the removal of the union from the middle. To get rid of the run of three "regs", the last field is renamed to "gp". Signed-off-by: Jeff Dike <jdike@linux.intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
55 lines
1.2 KiB
C
55 lines
1.2 KiB
C
/*
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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 <string.h>
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#include <sys/ptrace.h>
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#include "sysdep/ptrace.h"
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#include "user.h"
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/* This is set once at boot time and not changed thereafter */
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static unsigned long exec_regs[MAX_REG_NR];
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void init_thread_registers(struct uml_pt_regs *to)
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{
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memcpy(to->gp, exec_regs, sizeof(to->gp));
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}
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void save_registers(int pid, struct uml_pt_regs *regs)
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{
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int err;
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err = ptrace(PTRACE_GETREGS, pid, 0, regs->gp);
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if (err < 0)
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panic("save_registers - saving registers failed, errno = %d\n",
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errno);
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}
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void restore_registers(int pid, struct uml_pt_regs *regs)
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{
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int err;
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err = ptrace(PTRACE_SETREGS, pid, 0, regs->gp);
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if (err < 0)
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panic("restore_registers - saving registers failed, "
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"errno = %d\n", errno);
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}
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void init_registers(int pid)
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{
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int err;
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err = ptrace(PTRACE_GETREGS, pid, 0, exec_regs);
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if (err)
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panic("check_ptrace : PTRACE_GETREGS failed, errno = %d",
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errno);
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}
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void get_safe_registers(unsigned long *regs)
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{
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memcpy(regs, exec_regs, sizeof(exec_regs));
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}
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