forked from luck/tmp_suning_uos_patched
aa6758d486
Implement sys_[gs]et_thread_area and the corresponding ptrace operations for UML. This is the main chunk, additional parts follow. This implementation is now well tested and has run reliably for some time, and we've understood all the previously existing problems. Their implementation saves the new GDT content and then forwards the call to the host when appropriate, i.e. immediately when the target process is running or on context switch otherwise (i.e. on fork and on ptrace() calls). In SKAS mode, we must switch registers on each context switch (because SKAS does not switches tls_array together with current->mm). Also, added get_cpu() locking; this has been done for SKAS mode, since TT does not need it (it does not use smp_processor_id()). Signed-off-by: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> Acked-by: Jeff Dike <jdike@addtoit.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
69 lines
1.7 KiB
C
69 lines
1.7 KiB
C
/*
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* Copyright (C) 2000, 2001, 2002 Jeff Dike (jdike@karaya.com)
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* Licensed under the GPL
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*/
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#ifndef __UM_PTRACE_GENERIC_H
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#define __UM_PTRACE_GENERIC_H
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#ifndef __ASSEMBLY__
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#include "linux/config.h"
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#define pt_regs pt_regs_subarch
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#define show_regs show_regs_subarch
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#define send_sigtrap send_sigtrap_subarch
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#include "asm/arch/ptrace.h"
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#undef pt_regs
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#undef show_regs
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#undef send_sigtrap
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#undef user_mode
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#undef instruction_pointer
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#include "sysdep/ptrace.h"
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struct pt_regs {
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union uml_pt_regs regs;
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};
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#define EMPTY_REGS { .regs = EMPTY_UML_PT_REGS }
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#define PT_REGS_IP(r) UPT_IP(&(r)->regs)
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#define PT_REGS_SP(r) UPT_SP(&(r)->regs)
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#define PT_REG(r, reg) UPT_REG(&(r)->regs, reg)
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#define PT_REGS_SET(r, reg, val) UPT_SET(&(r)->regs, reg, val)
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#define PT_REGS_SET_SYSCALL_RETURN(r, res) \
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UPT_SET_SYSCALL_RETURN(&(r)->regs, res)
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#define PT_REGS_RESTART_SYSCALL(r) UPT_RESTART_SYSCALL(&(r)->regs)
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#define PT_REGS_SYSCALL_NR(r) UPT_SYSCALL_NR(&(r)->regs)
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#define PT_REGS_SC(r) UPT_SC(&(r)->regs)
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#define instruction_pointer(regs) PT_REGS_IP(regs)
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struct task_struct;
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extern unsigned long getreg(struct task_struct *child, int regno);
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extern int putreg(struct task_struct *child, int regno, unsigned long value);
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extern int get_fpregs(unsigned long buf, struct task_struct *child);
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extern int set_fpregs(unsigned long buf, struct task_struct *child);
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extern int get_fpxregs(unsigned long buf, struct task_struct *child);
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extern int set_fpxregs(unsigned long buf, struct task_struct *tsk);
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extern void show_regs(struct pt_regs *regs);
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extern void send_sigtrap(struct task_struct *tsk, union uml_pt_regs *regs,
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int error_code);
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extern int arch_copy_tls(struct task_struct *new);
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extern void clear_flushed_tls(struct task_struct *task);
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#endif
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#endif
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