Blackfin arch: Allow ptrace to peek and poke application data in L1 data SRAM.

Signed-off-by: Jie Zhang <jie.zhang@analog.com>
Signed-off-by: Bryan Wu <cooloney@kernel.org>

1 files changed, 28 insertions, 0 deletions

diff --git a/arch/blackfin/kernel/ptrace.c b/arch/blackfin/kernel/ptrace.c
index f51ab088098e..bf1a51d8e608 100644
--- a/arch/blackfin/kernel/ptrace.c
+++ b/arch/blackfin/kernel/ptrace.c
@@ -220,6 +220,20 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data)
                                 copied = sizeof(tmp);
                         } else
 #endif
+#if L1_DATA_A_LENGTH != 0
+                        if (addr + add >= L1_DATA_A_START
+                            && addr + add + sizeof(tmp) <= L1_DATA_A_START + L1_DATA_A_LENGTH) {
+                                memcpy(&tmp, (const void *)(addr + add), sizeof(tmp));
+                                copied = sizeof(tmp);
+                        } else
+#endif
+#if L1_DATA_B_LENGTH != 0
+                        if (addr + add >= L1_DATA_B_START
+                            && addr + add + sizeof(tmp) <= L1_DATA_B_START + L1_DATA_B_LENGTH) {
+                                memcpy(&tmp, (const void *)(addr + add), sizeof(tmp));
+                                copied = sizeof(tmp);
+                        } else
+#endif
                         if (addr + add >= FIXED_CODE_START
                             && addr + add + sizeof(tmp) <= FIXED_CODE_END) {
                                 memcpy(&tmp, (const void *)(addr + add), sizeof(tmp));
@@ -290,6 +304,20 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data)
                                 copied = sizeof(data);
                         } else
 #endif
+#if L1_DATA_A_LENGTH != 0
+                        if (addr + add >= L1_DATA_A_START
+                            && addr + add + sizeof(data) <= L1_DATA_A_START + L1_DATA_A_LENGTH) {
+                                memcpy((void *)(addr + add), &data, sizeof(data));
+                                copied = sizeof(data);
+                        } else
+#endif
+#if L1_DATA_B_LENGTH != 0
+                        if (addr + add >= L1_DATA_B_START
+                            && addr + add + sizeof(data) <= L1_DATA_B_START + L1_DATA_B_LENGTH) {
+                                memcpy((void *)(addr + add), &data, sizeof(data));
+                                copied = sizeof(data);
+                        } else
+#endif
                         if (addr + add >= FIXED_CODE_START
                             && addr + add + sizeof(data) <= FIXED_CODE_END) {
                                 memcpy((void *)(addr + add), &data, sizeof(data));