diff options
| author | David S. Miller <davem@davemloft.net> | 2010-05-18 23:01:55 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2010-05-18 23:01:55 -0700 |
| commit | 2ec8c6bb5d8f3a62a79f463525054bae1e3d4487 (patch) | |
| tree | fa7f8400ac685fb52e96f64997c7c682fc2aa021 /arch/x86/kernel/hw_breakpoint.c | |
| parent | 7b39f90fabcf9e2af0cd79d0a60440d821e22b56 (diff) | |
| parent | 537b60d17894b7c19a6060feae40299d7109d6e7 (diff) | |
Merge branch 'master' of /home/davem/src/GIT/linux-2.6/
Conflicts:
include/linux/mod_devicetable.h
scripts/mod/file2alias.c
Diffstat (limited to 'arch/x86/kernel/hw_breakpoint.c')
| -rw-r--r-- | arch/x86/kernel/hw_breakpoint.c | 41 |
1 files changed, 6 insertions, 35 deletions
diff --git a/arch/x86/kernel/hw_breakpoint.c b/arch/x86/kernel/hw_breakpoint.c index d6cc065f519..a8f1b803d2f 100644 --- a/arch/x86/kernel/hw_breakpoint.c +++ b/arch/x86/kernel/hw_breakpoint.c @@ -189,25 +189,16 @@ static int get_hbp_len(u8 hbp_len) } /* - * Check for virtual address in user space. - */ -int arch_check_va_in_userspace(unsigned long va, u8 hbp_len) -{ - unsigned int len; - - len = get_hbp_len(hbp_len); - - return (va <= TASK_SIZE - len); -} - -/* * Check for virtual address in kernel space. */ -static int arch_check_va_in_kernelspace(unsigned long va, u8 hbp_len) +int arch_check_bp_in_kernelspace(struct perf_event *bp) { unsigned int len; + unsigned long va; + struct arch_hw_breakpoint *info = counter_arch_bp(bp); - len = get_hbp_len(hbp_len); + va = info->address; + len = get_hbp_len(info->len); return (va >= TASK_SIZE) && ((va + len - 1) >= TASK_SIZE); } @@ -300,8 +291,7 @@ static int arch_build_bp_info(struct perf_event *bp) /* * Validate the arch-specific HW Breakpoint register settings */ -int arch_validate_hwbkpt_settings(struct perf_event *bp, - struct task_struct *tsk) +int arch_validate_hwbkpt_settings(struct perf_event *bp) { struct arch_hw_breakpoint *info = counter_arch_bp(bp); unsigned int align; @@ -314,16 +304,6 @@ int arch_validate_hwbkpt_settings(struct perf_event *bp, ret = -EINVAL; - if (info->type == X86_BREAKPOINT_EXECUTE) - /* - * Ptrace-refactoring code - * For now, we'll allow instruction breakpoint only for user-space - * addresses - */ - if ((!arch_check_va_in_userspace(info->address, info->len)) && - info->len != X86_BREAKPOINT_EXECUTE) - return ret; - switch (info->len) { case X86_BREAKPOINT_LEN_1: align = 0; @@ -350,15 +330,6 @@ int arch_validate_hwbkpt_settings(struct perf_event *bp, if (info->address & align) return -EINVAL; - /* Check that the virtual address is in the proper range */ - if (tsk) { - if (!arch_check_va_in_userspace(info->address, info->len)) - return -EFAULT; - } else { - if (!arch_check_va_in_kernelspace(info->address, info->len)) - return -EFAULT; - } - return 0; } |