diff options
| author | Vineet Gupta <vgupta@kernel.org> | 2020-05-20 00:39:09 -0700 |
|---|---|---|
| committer | Vineet Gupta <vgupta@kernel.org> | 2023-08-18 10:30:07 -0700 |
| commit | 13347c10396055c4c6c38a54d10bc6ed5024fbe9 (patch) | |
| tree | f224f1f4d129965c58d1e6a8ab5b56e1f2c7f411 /arch/arc/kernel/entry.S | |
| parent | 0e93ecaeebd5d0f189d1fa50a614ac0816a8c703 (diff) | |
ARC: entry: Add more common chores to EXCEPTION_PROLOGUE
THe high level structure of most ARC exception handlers is
1. save regfile with EXCEPTION_PROLOGUE
2. setup r0: EFA (not part of pt_regs)
3. setup r1: pointer to pt_regs (SP)
4. drop down to pure kernel mode (from exception)
5. call the Linux "C" handler
Remove the boiler plate code by moving #2, #3, #4 into #1.
The exceptions to most exceptions are syscall Trap and Machine check
which don't do some of above for various reasons, so call a newly
introduced variant EXCEPTION_PROLOGUE_KEEP_AE (same as original
EXCEPTION_PROLOGUE)
Tested-by: Pavel Kozlov <Pavel.Kozlov@synopsys.com>
Signed-off-by: Vineet Gupta <vgupta@kernel.org>
Diffstat (limited to 'arch/arc/kernel/entry.S')
| -rw-r--r-- | arch/arc/kernel/entry.S | 19 |
1 files changed, 2 insertions, 17 deletions
diff --git a/arch/arc/kernel/entry.S b/arch/arc/kernel/entry.S index 46582fbebcf2..089f6680518f 100644 --- a/arch/arc/kernel/entry.S +++ b/arch/arc/kernel/entry.S @@ -80,11 +80,6 @@ ENTRY(instr_service) EXCEPTION_PROLOGUE - lr r0, [efa] - mov r1, sp - - FAKE_RET_FROM_EXCPN - bl do_insterror_or_kprobe b ret_from_exception END(instr_service) @@ -95,7 +90,7 @@ END(instr_service) ENTRY(EV_MachineCheck) - EXCEPTION_PROLOGUE ; ECR returned in r10 + EXCEPTION_PROLOGUE_KEEP_AE ; ECR returned in r10 lr r0, [efa] mov r1, sp @@ -128,11 +123,6 @@ ENTRY(EV_PrivilegeV) EXCEPTION_PROLOGUE - lr r0, [efa] - mov r1, sp - - FAKE_RET_FROM_EXCPN - bl do_privilege_fault b ret_from_exception END(EV_PrivilegeV) @@ -144,11 +134,6 @@ ENTRY(EV_Extension) EXCEPTION_PROLOGUE - lr r0, [efa] - mov r1, sp - - FAKE_RET_FROM_EXCPN - bl do_extension_fault b ret_from_exception END(EV_Extension) @@ -229,7 +214,7 @@ trap_with_param: ENTRY(EV_Trap) - EXCEPTION_PROLOGUE + EXCEPTION_PROLOGUE_KEEP_AE lr r12, [efa] |