diff options
Diffstat (limited to 'runtime/arch/arm64/quick_entrypoints_arm64.S')
| -rw-r--r-- | runtime/arch/arm64/quick_entrypoints_arm64.S | 80 |
1 files changed, 75 insertions, 5 deletions
diff --git a/runtime/arch/arm64/quick_entrypoints_arm64.S b/runtime/arch/arm64/quick_entrypoints_arm64.S index 6057289..9a877f6 100644 --- a/runtime/arch/arm64/quick_entrypoints_arm64.S +++ b/runtime/arch/arm64/quick_entrypoints_arm64.S @@ -196,6 +196,11 @@ .cfi_adjust_cfa_offset -176 .endm +.macro POP_REF_ONLY_CALLEE_SAVE_FRAME + add sp, sp, #176 + .cfi_adjust_cfa_offset -176 +.endm + .macro RESTORE_REF_ONLY_CALLEE_SAVE_FRAME_AND_RETURN RESTORE_REF_ONLY_CALLEE_SAVE_FRAME ret @@ -600,12 +605,12 @@ SAVE_SIZE_AND_METHOD=SAVE_SIZE+STACK_REFERENCE_SIZE str x0, [x4] .Lexit_art_quick_invoke_stub\@: - ldp x2, x19, [x29, #32] // Restore stack pointer and x19. + ldp x2, x19, [xFP, #32] // Restore stack pointer and x19. .cfi_restore x19 mov sp, x2 .cfi_restore sp - ldp x29, x30, [x29] // Restore old frame pointer and link register. + ldp xFP, xLR, [xFP] // Restore old frame pointer and link register. .cfi_restore x29 .cfi_restore x30 @@ -1577,9 +1582,74 @@ ENTRY art_quick_to_interpreter_bridge RETURN_OR_DELIVER_PENDING_EXCEPTION END art_quick_to_interpreter_bridge -UNIMPLEMENTED art_quick_instrumentation_entry -UNIMPLEMENTED art_quick_instrumentation_exit -UNIMPLEMENTED art_quick_deoptimize + +// +// Instrumentation-related stubs +// + .extern artInstrumentationMethodEntryFromCode +ENTRY art_quick_instrumentation_entry + SETUP_REF_AND_ARGS_CALLEE_SAVE_FRAME + + mov x19, x0 // Preserve method reference in a callee-save. + + mov x2, xSELF + mov x3, sp + mov x4, xLR + bl artInstrumentationMethodEntryFromCode // (Method*, Object*, Thread*, SP, LR) + + mov x9, x0 // x0 = result of call. + mov x0, x19 // Reload method reference. + + RESTORE_REF_AND_ARGS_CALLEE_SAVE_FRAME // Note: will restore xSELF + adr xLR, art_quick_instrumentation_exit + br x9 // Tail-call method with lr set to art_quick_instrumentation_exit. +END art_quick_instrumentation_entry + + .extern artInstrumentationMethodExitFromCode +ENTRY art_quick_instrumentation_exit + mov xLR, #0 // Clobber LR for later checks. + + SETUP_REF_ONLY_CALLEE_SAVE_FRAME + + // We need to save x0 and d0. We could use a callee-save from SETUP_REF_ONLY, but then + // we would need to fully restore it. As there are a lot of callee-save registers, it seems + // easier to have an extra small stack area. + + str x19, [sp, #-16]! // Save integer result. + .cfi_adjust_cfa_offset 16 + str d0, [sp, #8] // Save floating-point result. + + mov x0, xSELF // Pass Thread. + add x1, sp, #16 // Pass SP. + mov x2, x0 // Pass integer result. + fmov x3, d0 // Pass floating-point result. + bl artInstrumentationMethodExitFromCode // (Thread*, SP, gpr_res, fpr_res) + + mov x9, x0 // Return address from instrumentation call. + mov xLR, x1 // r1 is holding link register if we're to bounce to deoptimize + + ldr d0, [sp, #8] // Restore floating-point result. + ldr x0, [sp], 16 // Restore integer result, and drop stack area. + .cfi_adjust_cfa_offset 16 + + POP_REF_ONLY_CALLEE_SAVE_FRAME + + br x9 // Tail-call out. +END art_quick_instrumentation_exit + + /* + * Instrumentation has requested that we deoptimize into the interpreter. The deoptimization + * will long jump to the upcall with a special exception of -1. + */ + .extern artDeoptimize +ENTRY art_quick_deoptimize + SETUP_SAVE_ALL_CALLEE_SAVE_FRAME + mov x0, xSELF // Pass thread. + mov x1, sp // Pass SP. + bl artDeoptimize // artDeoptimize(Thread*, SP) +END art_quick_deoptimize + + UNIMPLEMENTED art_quick_indexof /* |