| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 2003 PathScale, Inc. |
| 3 | * |
| 4 | * Licensed under the GPL |
| 5 | */ |
| 6 | |
| 7 | #define __FRAME_OFFSETS |
| 8 | #include "asm/ptrace.h" |
| 9 | #include "linux/sched.h" |
| 10 | #include "linux/errno.h" |
| 11 | #include "asm/elf.h" |
| 12 | |
| 13 | /* XXX x86_64 */ |
| 14 | unsigned long not_ss; |
| 15 | unsigned long not_ds; |
| 16 | unsigned long not_es; |
| 17 | |
| 18 | #define SC_SS(r) (not_ss) |
| 19 | #define SC_DS(r) (not_ds) |
| 20 | #define SC_ES(r) (not_es) |
| 21 | |
| 22 | /* determines which flags the user has access to. */ |
| 23 | /* 1 = access 0 = no access */ |
| 24 | #define FLAG_MASK 0x44dd5UL |
| 25 | |
| 26 | int putreg(struct task_struct *child, int regno, unsigned long value) |
| 27 | { |
| 28 | unsigned long tmp; |
| 29 | |
| 30 | #ifdef TIF_IA32 |
| 31 | /* Some code in the 64bit emulation may not be 64bit clean. |
| 32 | Don't take any chances. */ |
| 33 | if (test_tsk_thread_flag(child, TIF_IA32)) |
| 34 | value &= 0xffffffff; |
| 35 | #endif |
| 36 | switch (regno){ |
| 37 | case FS: |
| 38 | case GS: |
| 39 | case DS: |
| 40 | case ES: |
| 41 | case SS: |
| 42 | case CS: |
| 43 | if (value && (value & 3) != 3) |
| 44 | return -EIO; |
| 45 | value &= 0xffff; |
| 46 | break; |
| 47 | |
| 48 | case FS_BASE: |
| 49 | case GS_BASE: |
| 50 | if (!((value >> 48) == 0 || (value >> 48) == 0xffff)) |
| 51 | return -EIO; |
| 52 | break; |
| 53 | |
| 54 | case EFLAGS: |
| 55 | value &= FLAG_MASK; |
| 56 | tmp = PT_REGS_EFLAGS(&child->thread.regs) & ~FLAG_MASK; |
| 57 | value |= tmp; |
| 58 | break; |
| 59 | } |
| 60 | |
| 61 | PT_REGS_SET(&child->thread.regs, regno, value); |
| 62 | return 0; |
| 63 | } |
| 64 | |
| 65 | unsigned long getreg(struct task_struct *child, int regno) |
| 66 | { |
| 67 | unsigned long retval = ~0UL; |
| 68 | switch (regno) { |
| 69 | case FS: |
| 70 | case GS: |
| 71 | case DS: |
| 72 | case ES: |
| 73 | case SS: |
| 74 | case CS: |
| 75 | retval = 0xffff; |
| 76 | /* fall through */ |
| 77 | default: |
| 78 | retval &= PT_REG(&child->thread.regs, regno); |
| 79 | #ifdef TIF_IA32 |
| 80 | if (test_tsk_thread_flag(child, TIF_IA32)) |
| 81 | retval &= 0xffffffff; |
| 82 | #endif |
| 83 | } |
| 84 | return retval; |
| 85 | } |
| 86 | |
| 87 | void arch_switch(void) |
| 88 | { |
| 89 | /* XXX |
| 90 | printk("arch_switch\n"); |
| 91 | */ |
| 92 | } |
| 93 | |
| 94 | int is_syscall(unsigned long addr) |
| 95 | { |
| 96 | panic("is_syscall"); |
| 97 | } |
| 98 | |
| 99 | int dump_fpu(struct pt_regs *regs, elf_fpregset_t *fpu ) |
| 100 | { |
| 101 | panic("dump_fpu"); |
| 102 | return(1); |
| 103 | } |
| 104 | |
| 105 | int get_fpregs(unsigned long buf, struct task_struct *child) |
| 106 | { |
| 107 | panic("get_fpregs"); |
| 108 | return(0); |
| 109 | } |
| 110 | |
| 111 | int set_fpregs(unsigned long buf, struct task_struct *child) |
| 112 | { |
| 113 | panic("set_fpregs"); |
| 114 | return(0); |
| 115 | } |
| 116 | |
| 117 | int get_fpxregs(unsigned long buf, struct task_struct *tsk) |
| 118 | { |
| 119 | panic("get_fpxregs"); |
| 120 | return(0); |
| 121 | } |
| 122 | |
| 123 | int set_fpxregs(unsigned long buf, struct task_struct *tsk) |
| 124 | { |
| 125 | panic("set_fxpregs"); |
| 126 | return(0); |
| 127 | } |
| 128 | |
| 129 | /* |
| 130 | * Overrides for Emacs so that we follow Linus's tabbing style. |
| 131 | * Emacs will notice this stuff at the end of the file and automatically |
| 132 | * adjust the settings for this buffer only. This must remain at the end |
| 133 | * of the file. |
| 134 | * --------------------------------------------------------------------------- |
| 135 | * Local variables: |
| 136 | * c-file-style: "linux" |
| 137 | * End: |
| 138 | */ |