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58 lines
1.1 KiB
58 lines
1.1 KiB
// 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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