From 68b7f7153fa58df710924fbb79722717d2d16094 Mon Sep 17 00:00:00 2001 From: Paul Brook Date: Fri, 24 Jul 2009 12:34:58 +0100 Subject: nommu: ptrace support The patch below adds ARM ptrace functions to get the process load address. This is required for useful userspace debugging on mmuless systems. These values are obtained by reading magic offsets with PTRACE_PEEKUSR, as on other nommu targets. I picked arbitrary large values for the offsets. Signed-off-by: Paul Brook --- arch/arm/kernel/ptrace.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) (limited to 'arch/arm/kernel/ptrace.c') diff --git a/arch/arm/kernel/ptrace.c b/arch/arm/kernel/ptrace.c index 89882a1..a2ea385 100644 --- a/arch/arm/kernel/ptrace.c +++ b/arch/arm/kernel/ptrace.c @@ -521,7 +521,13 @@ static int ptrace_read_user(struct task_struct *tsk, unsigned long off, return -EIO; tmp = 0; - if (off < sizeof(struct pt_regs)) + if (off == PT_TEXT_ADDR) + tmp = tsk->mm->start_code; + else if (off == PT_DATA_ADDR) + tmp = tsk->mm->start_data; + else if (off == PT_TEXT_END_ADDR) + tmp = tsk->mm->end_code; + else if (off < sizeof(struct pt_regs)) tmp = get_user_reg(tsk, off >> 2); return put_user(tmp, ret); -- cgit v1.1