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authorPaul Brook <paul@codesourcery.com>2009-07-24 12:34:58 +0100
committerCatalin Marinas <catalin.marinas@arm.com>2009-07-24 12:34:58 +0100
commit68b7f7153fa58df710924fbb79722717d2d16094 (patch)
treef7a170a4e93be7b5ea852cccfc03e88bd20ee964 /arch/arm/kernel
parent5d57795e26c413656725c26bd053dbee3711adee (diff)
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 <paul@codesourcery.com>
Diffstat (limited to 'arch/arm/kernel')
-rw-r--r--arch/arm/kernel/ptrace.c8
1 files changed, 7 insertions, 1 deletions
diff --git a/arch/arm/kernel/ptrace.c b/arch/arm/kernel/ptrace.c
index 89882a1d018..a2ea3854cb3 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);