diff options
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_.patch | 66 |
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 - |