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97870c34b4
Convert files to use SPDX header. All files are licensed under the GPLv2. Signed-off-by: Alex Dewar <alex.dewar@gmx.co.uk> Signed-off-by: Richard Weinberger <richard@nod.at>
58 lines
1.1 KiB
C
58 lines
1.1 KiB
C
// SPDX-License-Identifier: GPL-2.0
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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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*/
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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 <sysdep/ptrace_user.h>
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#include <registers.h>
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int 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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return -errno;
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return 0;
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}
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int 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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return -errno;
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return 0;
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}
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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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static unsigned long exec_fp_regs[FP_SIZE];
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int 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 < 0)
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return -errno;
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arch_init_registers(pid);
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get_fp_registers(pid, exec_fp_regs);
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return 0;
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}
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void get_safe_registers(unsigned long *regs, unsigned long *fp_regs)
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{
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memcpy(regs, exec_regs, sizeof(exec_regs));
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if (fp_regs)
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memcpy(fp_regs, exec_fp_regs, sizeof(exec_fp_regs));
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}
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