diff options
Diffstat (limited to 'arch/um/sys-x86_64/ptrace.c')
| -rw-r--r-- | arch/um/sys-x86_64/ptrace.c | 101 |
1 files changed, 39 insertions, 62 deletions
diff --git a/arch/um/sys-x86_64/ptrace.c b/arch/um/sys-x86_64/ptrace.c index b9032992a99..a3cfeed17af 100644 --- a/arch/um/sys-x86_64/ptrace.c +++ b/arch/um/sys-x86_64/ptrace.c @@ -1,5 +1,6 @@ /* * Copyright 2003 PathScale, Inc. + * Copyright (C) 2003 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com) * * Licensed under the GPL */ @@ -12,17 +13,10 @@ #include <asm/uaccess.h> #include <asm/elf.h> -/* XXX x86_64 */ -unsigned long not_ss; -unsigned long not_ds; -unsigned long not_es; - -#define SC_SS(r) (not_ss) -#define SC_DS(r) (not_ds) -#define SC_ES(r) (not_es) - -/* determines which flags the user has access to. */ -/* 1 = access 0 = no access */ +/* + * determines which flags the user has access to. + * 1 = access 0 = no access + */ #define FLAG_MASK 0x44dd5UL int putreg(struct task_struct *child, int regno, unsigned long value) @@ -66,20 +60,21 @@ int putreg(struct task_struct *child, int regno, unsigned long value) int poke_user(struct task_struct *child, long addr, long data) { - if ((addr & 3) || addr < 0) - return -EIO; - - if (addr < MAX_REG_OFFSET) - return putreg(child, addr, data); - else if((addr >= offsetof(struct user, u_debugreg[0])) && - (addr <= offsetof(struct user, u_debugreg[7]))){ - addr -= offsetof(struct user, u_debugreg[0]); - addr = addr >> 2; - if((addr == 4) || (addr == 5)) return -EIO; - child->thread.arch.debugregs[addr] = data; - return 0; - } - return -EIO; + if ((addr & 3) || addr < 0) + return -EIO; + + if (addr < MAX_REG_OFFSET) + return putreg(child, addr, data); + else if ((addr >= offsetof(struct user, u_debugreg[0])) && + (addr <= offsetof(struct user, u_debugreg[7]))){ + addr -= offsetof(struct user, u_debugreg[0]); + addr = addr >> 2; + if ((addr == 4) || (addr == 5)) + return -EIO; + child->thread.arch.debugregs[addr] = data; + return 0; + } + return -EIO; } unsigned long getreg(struct task_struct *child, int regno) @@ -107,29 +102,22 @@ unsigned long getreg(struct task_struct *child, int regno) int peek_user(struct task_struct *child, long addr, long data) { /* read the word at location addr in the USER area. */ - unsigned long tmp; - - if ((addr & 3) || addr < 0) - return -EIO; - - tmp = 0; /* Default return condition */ - if(addr < MAX_REG_OFFSET){ - tmp = getreg(child, addr); - } - else if((addr >= offsetof(struct user, u_debugreg[0])) && - (addr <= offsetof(struct user, u_debugreg[7]))){ - addr -= offsetof(struct user, u_debugreg[0]); - addr = addr >> 2; - tmp = child->thread.arch.debugregs[addr]; - } - return put_user(tmp, (unsigned long *) data); -} + unsigned long tmp; -void arch_switch(void) -{ -/* XXX - printk("arch_switch\n"); -*/ + if ((addr & 3) || addr < 0) + return -EIO; + + tmp = 0; /* Default return condition */ + if (addr < MAX_REG_OFFSET){ + tmp = getreg(child, addr); + } + else if ((addr >= offsetof(struct user, u_debugreg[0])) && + (addr <= offsetof(struct user, u_debugreg[7]))){ + addr -= offsetof(struct user, u_debugreg[0]); + addr = addr >> 2; + tmp = child->thread.arch.debugregs[addr]; + } + return put_user(tmp, (unsigned long *) data); } /* XXX Mostly copied from sys-i386 */ @@ -139,21 +127,21 @@ int is_syscall(unsigned long addr) int n; n = copy_from_user(&instr, (void __user *) addr, sizeof(instr)); - if(n){ + if (n){ /* access_process_vm() grants access to vsyscall and stub, * while copy_from_user doesn't. Maybe access_process_vm is * slow, but that doesn't matter, since it will be called only * in case of singlestepping, if copy_from_user failed. */ n = access_process_vm(current, addr, &instr, sizeof(instr), 0); - if(n != sizeof(instr)) { + if (n != sizeof(instr)) { printk("is_syscall : failed to read instruction from " "0x%lx\n", addr); - return(1); + return 1; } } /* sysenter */ - return(instr == 0x050f); + return instr == 0x050f; } int get_fpregs(struct user_i387_struct __user *buf, struct task_struct *child) @@ -204,14 +192,3 @@ long subarch_ptrace(struct task_struct *child, long request, long addr, return ret; } - -/* - * Overrides for Emacs so that we follow Linus's tabbing style. - * Emacs will notice this stuff at the end of the file and automatically - * adjust the settings for this buffer only. This must remain at the end - * of the file. - * --------------------------------------------------------------------------- - * Local variables: - * c-file-style: "linux" - * End: - */ |