2 * Copyright 2003 PathScale, Inc.
4 * Licensed under the GPL
7 #define __FRAME_OFFSETS
8 #include "asm/ptrace.h"
9 #include "linux/sched.h"
10 #include "linux/errno.h"
18 #define SC_SS(r) (not_ss)
19 #define SC_DS(r) (not_ds)
20 #define SC_ES(r) (not_es)
22 /* determines which flags the user has access to. */
23 /* 1 = access 0 = no access */
24 #define FLAG_MASK 0x44dd5UL
26 int putreg(struct task_struct *child, int regno, unsigned long value)
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))
43 if (value && (value & 3) != 3)
50 if (!((value >> 48) == 0 || (value >> 48) == 0xffff))
56 tmp = PT_REGS_EFLAGS(&child->thread.regs) & ~FLAG_MASK;
61 PT_REGS_SET(&child->thread.regs, regno, value);
65 int poke_user(struct task_struct *child, long addr, long data)
67 if ((addr & 3) || addr < 0)
70 if (addr < MAX_REG_OFFSET)
71 return putreg(child, addr, data);
73 #if 0 /* Need x86_64 debugregs handling */
74 else if((addr >= offsetof(struct user, u_debugreg[0])) &&
75 (addr <= offsetof(struct user, u_debugreg[7]))){
76 addr -= offsetof(struct user, u_debugreg[0]);
78 if((addr == 4) || (addr == 5)) return -EIO;
79 child->thread.arch.debugregs[addr] = data;
86 unsigned long getreg(struct task_struct *child, int regno)
88 unsigned long retval = ~0UL;
99 retval &= PT_REG(&child->thread.regs, regno);
101 if (test_tsk_thread_flag(child, TIF_IA32))
102 retval &= 0xffffffff;
108 int peek_user(struct task_struct *child, long addr, long data)
110 /* read the word at location addr in the USER area. */
113 if ((addr & 3) || addr < 0)
116 tmp = 0; /* Default return condition */
117 if(addr < MAX_REG_OFFSET){
118 tmp = getreg(child, addr);
120 #if 0 /* Need x86_64 debugregs handling */
121 else if((addr >= offsetof(struct user, u_debugreg[0])) &&
122 (addr <= offsetof(struct user, u_debugreg[7]))){
123 addr -= offsetof(struct user, u_debugreg[0]);
125 tmp = child->thread.arch.debugregs[addr];
128 return put_user(tmp, (unsigned long *) data);
131 void arch_switch(void)
134 printk("arch_switch\n");
138 int is_syscall(unsigned long addr)
143 int dump_fpu(struct pt_regs *regs, elf_fpregset_t *fpu )
149 int get_fpregs(unsigned long buf, struct task_struct *child)
155 int set_fpregs(unsigned long buf, struct task_struct *child)
161 int get_fpxregs(unsigned long buf, struct task_struct *tsk)
163 panic("get_fpxregs");
167 int set_fpxregs(unsigned long buf, struct task_struct *tsk)
169 panic("set_fxpregs");
174 * Overrides for Emacs so that we follow Linus's tabbing style.
175 * Emacs will notice this stuff at the end of the file and automatically
176 * adjust the settings for this buffer only. This must remain at the end
178 * ---------------------------------------------------------------------------
180 * c-file-style: "linux"