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https://github.com/edk2-porting/linux-next.git
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9674cdc74d
This patch adds several syscalls, that provide necessary functionality to support NPTL on m68k/ColdFire. The syscalls are get_thread_area, set_thread_area, atomic_cmpxchg_32 and atomic_barrier. The cmpxchg syscall is required for ColdFire as it doesn't support 'cas' instruction. Also a ptrace call PTRACE_GET_THREAD_AREA is added to allow debugger to inspect the TLS storage. Signed-off-by: Maxim Kuvyrkov <maxim@codesourcery.com> Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
107 lines
2.3 KiB
C
107 lines
2.3 KiB
C
#ifndef _M68K_PTRACE_H
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#define _M68K_PTRACE_H
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#define PT_D1 0
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#define PT_D2 1
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#define PT_D3 2
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#define PT_D4 3
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#define PT_D5 4
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#define PT_D6 5
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#define PT_D7 6
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#define PT_A0 7
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#define PT_A1 8
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#define PT_A2 9
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#define PT_A3 10
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#define PT_A4 11
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#define PT_A5 12
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#define PT_A6 13
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#define PT_D0 14
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#define PT_USP 15
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#define PT_ORIG_D0 16
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#define PT_SR 17
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#define PT_PC 18
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#ifndef __ASSEMBLY__
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/* this struct defines the way the registers are stored on the
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stack during a system call. */
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struct pt_regs {
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long d1;
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long d2;
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long d3;
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long d4;
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long d5;
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long a0;
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long a1;
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long a2;
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long d0;
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long orig_d0;
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long stkadj;
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#ifdef CONFIG_COLDFIRE
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unsigned format : 4; /* frame format specifier */
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unsigned vector : 12; /* vector offset */
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unsigned short sr;
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unsigned long pc;
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#else
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unsigned short sr;
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unsigned long pc;
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unsigned format : 4; /* frame format specifier */
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unsigned vector : 12; /* vector offset */
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#endif
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};
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/*
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* This is the extended stack used by signal handlers and the context
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* switcher: it's pushed after the normal "struct pt_regs".
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*/
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struct switch_stack {
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unsigned long d6;
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unsigned long d7;
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unsigned long a3;
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unsigned long a4;
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unsigned long a5;
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unsigned long a6;
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unsigned long retpc;
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};
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/* Arbitrarily choose the same ptrace numbers as used by the Sparc code. */
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#define PTRACE_GETREGS 12
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#define PTRACE_SETREGS 13
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#define PTRACE_GETFPREGS 14
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#define PTRACE_SETFPREGS 15
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#define PTRACE_GET_THREAD_AREA 25
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#define PTRACE_SINGLEBLOCK 33 /* resume execution until next branch */
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#ifdef __KERNEL__
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#ifndef PS_S
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#define PS_S (0x2000)
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#define PS_M (0x1000)
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#endif
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#define user_mode(regs) (!((regs)->sr & PS_S))
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#define instruction_pointer(regs) ((regs)->pc)
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#define profile_pc(regs) instruction_pointer(regs)
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extern void show_regs(struct pt_regs *);
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/*
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* These are defined as per linux/ptrace.h.
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*/
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struct task_struct;
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#define arch_has_single_step() (1)
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extern void user_enable_single_step(struct task_struct *);
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extern void user_disable_single_step(struct task_struct *);
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#ifdef CONFIG_MMU
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#define arch_has_block_step() (1)
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extern void user_enable_block_step(struct task_struct *);
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#endif
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#endif /* __KERNEL__ */
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#endif /* __ASSEMBLY__ */
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#endif /* _M68K_PTRACE_H */
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