Linux Kernel  3.7.1
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ptrace.h
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1 /*
2  * Licensed under the GPL
3  */
4 
5 #ifndef __SYS_PTRACE_PPC_H
6 #define __SYS_PTRACE_PPC_H
7 
8 #include <linux/types.h>
9 
10 /* the following taken from <asm-ppc/ptrace.h> */
11 
12 #ifdef CONFIG_PPC64
13 #define PPC_REG unsigned long /*long*/
14 #else
15 #define PPC_REG unsigned long
16 #endif
17 struct sys_pt_regs_s {
18  PPC_REG gpr[32];
21  PPC_REG orig_gpr3; /* Used for restarting system calls */
26  PPC_REG mq; /* 601 only (not used at present) */
27  /* Used on APUS to hold IPL value. */
28  PPC_REG trap; /* Reason for being here */
29  PPC_REG dar; /* Fault registers */
31  PPC_REG result; /* Result of a system call */
32 };
33 
34 #define NUM_REGS (sizeof(struct sys_pt_regs_s) / sizeof(PPC_REG))
35 
36 struct sys_pt_regs {
37  PPC_REG regs[sizeof(struct sys_pt_regs_s) / sizeof(PPC_REG)];
38 };
39 
40 #define UM_MAX_REG (PT_FPR0)
41 #define UM_MAX_REG_OFFSET (UM_MAX_REG * sizeof(PPC_REG))
42 
43 #define EMPTY_REGS { { [ 0 ... NUM_REGS - 1] = 0 } }
44 
45 #define UM_REG(r, n) ((r)->regs[n])
46 
47 #define UM_SYSCALL_RET(r) UM_REG(r, PT_R3)
48 #define UM_SP(r) UM_REG(r, PT_R1)
49 #define UM_IP(r) UM_REG(r, PT_NIP)
50 #define UM_ELF_ZERO(r) UM_REG(r, PT_FPSCR)
51 #define UM_SYSCALL_NR(r) UM_REG(r, PT_R0)
52 #define UM_SYSCALL_ARG1(r) UM_REG(r, PT_ORIG_R3)
53 #define UM_SYSCALL_ARG2(r) UM_REG(r, PT_R4)
54 #define UM_SYSCALL_ARG3(r) UM_REG(r, PT_R5)
55 #define UM_SYSCALL_ARG4(r) UM_REG(r, PT_R6)
56 #define UM_SYSCALL_ARG5(r) UM_REG(r, PT_R7)
57 #define UM_SYSCALL_ARG6(r) UM_REG(r, PT_R8)
58 
59 #define UM_SYSCALL_NR_OFFSET (PT_R0 * sizeof(PPC_REG))
60 #define UM_SYSCALL_RET_OFFSET (PT_R3 * sizeof(PPC_REG))
61 #define UM_SYSCALL_ARG1_OFFSET (PT_R3 * sizeof(PPC_REG))
62 #define UM_SYSCALL_ARG2_OFFSET (PT_R4 * sizeof(PPC_REG))
63 #define UM_SYSCALL_ARG3_OFFSET (PT_R5 * sizeof(PPC_REG))
64 #define UM_SYSCALL_ARG4_OFFSET (PT_R6 * sizeof(PPC_REG))
65 #define UM_SYSCALL_ARG5_OFFSET (PT_R7 * sizeof(PPC_REG))
66 #define UM_SYSCALL_ARG6_OFFSET (PT_R8 * sizeof(PPC_REG))
67 #define UM_SP_OFFSET (PT_R1 * sizeof(PPC_REG))
68 #define UM_IP_OFFSET (PT_NIP * sizeof(PPC_REG))
69 #define UM_ELF_ZERO_OFFSET (PT_R3 * sizeof(PPC_REG))
70 
71 #define UM_SET_SYSCALL_RETURN(_regs, result) \
72 do { \
73  if (result < 0) { \
74  (_regs)->regs[PT_CCR] |= 0x10000000; \
75  UM_SYSCALL_RET((_regs)) = -result; \
76  } else { \
77  UM_SYSCALL_RET((_regs)) = result; \
78  } \
79 } while(0)
80 
81 extern void shove_aux_table(unsigned long sp);
82 #define UM_FIX_EXEC_STACK(sp) shove_aux_table(sp);
83 
84 /* These aren't actually defined. The undefs are just to make sure
85  * everyone's clear on the concept.
86  */
87 #undef UML_HAVE_GETREGS
88 #undef UML_HAVE_GETFPREGS
89 #undef UML_HAVE_SETREGS
90 #undef UML_HAVE_SETFPREGS
91 
92 #endif
93