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Diffstat (limited to 'target/linux/patches/4.19.151/0001-Revert-ARC-entry-fix-potential-EFA-clobber-when-TIF_.patch')
-rw-r--r--target/linux/patches/4.19.151/0001-Revert-ARC-entry-fix-potential-EFA-clobber-when-TIF_.patch66
1 files changed, 0 insertions, 66 deletions
diff --git a/target/linux/patches/4.19.151/0001-Revert-ARC-entry-fix-potential-EFA-clobber-when-TIF_.patch b/target/linux/patches/4.19.151/0001-Revert-ARC-entry-fix-potential-EFA-clobber-when-TIF_.patch
deleted file mode 100644
index 1215bb6d0..000000000
--- a/target/linux/patches/4.19.151/0001-Revert-ARC-entry-fix-potential-EFA-clobber-when-TIF_.patch
+++ /dev/null
@@ -1,66 +0,0 @@
-From af5e43cd88d4b7d59260de6bdacbf715e2a7ff5d Mon Sep 17 00:00:00 2001
-From: Waldemar Brodkorb <wbx@openadk.org>
-Date: Fri, 16 Oct 2020 01:17:24 +0200
-Subject: [PATCH] Revert "ARC: entry: fix potential EFA clobber when
- TIF_SYSCALL_TRACE"
-
-This reverts commit 01b636cbc4c39c7073c02c2f1dfbe8c36c11938f.
-
-Signed-off-by: Waldemar Brodkorb <wbx@openadk.org>
----
- arch/arc/kernel/entry.S | 16 +++++++++++-----
- 1 file changed, 11 insertions(+), 5 deletions(-)
-
-diff --git a/arch/arc/kernel/entry.S b/arch/arc/kernel/entry.S
-index 705a68208423..85d9ea4a0acc 100644
---- a/arch/arc/kernel/entry.S
-+++ b/arch/arc/kernel/entry.S
-@@ -156,6 +156,7 @@ END(EV_Extension)
- tracesys:
- ; save EFA in case tracer wants the PC of traced task
- ; using ERET won't work since next-PC has already committed
-+ lr r12, [efa]
- GET_CURR_TASK_FIELD_PTR TASK_THREAD, r11
- st r12, [r11, THREAD_FAULT_ADDR] ; thread.fault_address
-
-@@ -198,9 +199,15 @@ tracesys_exit:
- ; Breakpoint TRAP
- ; ---------------------------------------------
- trap_with_param:
-- mov r0, r12 ; EFA in case ptracer/gdb wants stop_pc
-+
-+ ; stop_pc info by gdb needs this info
-+ lr r0, [efa]
- mov r1, sp
-
-+ ; Now that we have read EFA, it is safe to do "fake" rtie
-+ ; and get out of CPU exception mode
-+ FAKE_RET_FROM_EXCPN
-+
- ; Save callee regs in case gdb wants to have a look
- ; SP will grow up by size of CALLEE Reg-File
- ; NOTE: clobbers r12
-@@ -227,10 +234,6 @@ ENTRY(EV_Trap)
-
- EXCEPTION_PROLOGUE
-
-- lr r12, [efa]
--
-- FAKE_RET_FROM_EXCPN
--
- ;============ TRAP 1 :breakpoints
- ; Check ECR for trap with arg (PROLOGUE ensures r9 has ECR)
- bmsk.f 0, r9, 7
-@@ -238,6 +241,9 @@ ENTRY(EV_Trap)
-
- ;============ TRAP (no param): syscall top level
-
-+ ; First return from Exception to pure K mode (Exception/IRQs renabled)
-+ FAKE_RET_FROM_EXCPN
-+
- ; If syscall tracing ongoing, invoke pre-post-hooks
- GET_CURR_THR_INFO_FLAGS r10
- btst r10, TIF_SYSCALL_TRACE
---
-2.11.0
-