[webkit-changes] [293654] trunk/Source/JavaScriptCore

Sun, 01 May 2022 08:09:41 -0700

Title: [293654] trunk/Source/_javascript_Core
Revision
293654
Author
z...@falconsigh.net
Date
2022-05-01 08:08:25 -0700 (Sun, 01 May 2022)

Log Message

[RISCV64] Implement MacroAssembler::probe(), ctiMasmProbeTrampoline
https://bugs.webkit.org/show_bug.cgi?id=239938

Reviewed by Yusuke Suzuki.

Implement MacroAssembler::probe() for RISCV64, along with the
ctiMasmProbeTrampoline operation. The implementation follows the process
of implementations for other platforms, with incoming, outgoing and
return-address-restoration records used to store register values during
setup and breakdown of the probe.

Going into the probe and back out of it, the general-purpose and
floating-point registers are stored, with the exception of global and
thread registers (x3 and x4). After the probe, if the probe state on the
stack is broken, the complete state is re-established before the
registers are reloaded, with the stack pointer and return address
registers set up last.

Covered by probing-related unit tests in testmasm.

* assembler/MacroAssemblerRISCV64.cpp:
(JSC::MacroAssembler::probe):

Modified Paths

Diff

Modified: trunk/Source/_javascript_Core/ChangeLog (293653 => 293654)


--- trunk/Source/_javascript_Core/ChangeLog	2022-05-01 15:05:52 UTC (rev 293653)
+++ trunk/Source/_javascript_Core/ChangeLog	2022-05-01 15:08:25 UTC (rev 293654)
@@ -1,5 +1,30 @@
 2022-05-01  Zan Dobersek  <zdober...@igalia.com>
 
+        [RISCV64] Implement MacroAssembler::probe(), ctiMasmProbeTrampoline
+        https://bugs.webkit.org/show_bug.cgi?id=239938
+
+        Reviewed by Yusuke Suzuki.
+
+        Implement MacroAssembler::probe() for RISCV64, along with the
+        ctiMasmProbeTrampoline operation. The implementation follows the process
+        of implementations for other platforms, with incoming, outgoing and
+        return-address-restoration records used to store register values during
+        setup and breakdown of the probe.
+
+        Going into the probe and back out of it, the general-purpose and
+        floating-point registers are stored, with the exception of global and
+        thread registers (x3 and x4). After the probe, if the probe state on the
+        stack is broken, the complete state is re-established before the
+        registers are reloaded, with the stack pointer and return address
+        registers set up last.
+
+        Covered by probing-related unit tests in testmasm.
+
+        * assembler/MacroAssemblerRISCV64.cpp:
+        (JSC::MacroAssembler::probe):
+
+2022-05-01  Zan Dobersek  <zdober...@igalia.com>
+
         [RISCV64] Enable testmasm execution
         https://bugs.webkit.org/show_bug.cgi?id=239937

Modified: trunk/Source/_javascript_Core/assembler/MacroAssemblerRISCV64.cpp (293653 => 293654)


--- trunk/Source/_javascript_Core/assembler/MacroAssemblerRISCV64.cpp	2022-05-01 15:05:52 UTC (rev 293653)
+++ trunk/Source/_javascript_Core/assembler/MacroAssemblerRISCV64.cpp	2022-05-01 15:08:25 UTC (rev 293654)
@@ -29,12 +29,489 @@
 #if ENABLE(ASSEMBLER) && CPU(RISCV64)
 
 #include "ProbeContext.h"
+#include <wtf/InlineASM.h>
 
 namespace JSC {
 
-void MacroAssembler::probe(Probe::Function, void*)
+JSC_DECLARE_JIT_OPERATION(ctiMasmProbeTrampoline, void, ());
+JSC_ANNOTATE_JIT_OPERATION_PROBE(ctiMasmProbeTrampoline);
+
+using namespace RISCV64Registers;
+
+#define PTR_SIZE 8
+#define GPREG_SIZE 8
+#define FPREG_SIZE 8
+
+#define PROBE_PROBE_FUNCTION_OFFSET (0 * PTR_SIZE)
+#define PROBE_ARG_OFFSET (1 * PTR_SIZE)
+#define PROBE_INITIALIZE_STACK_FUNCTION_OFFSET (2 * PTR_SIZE)
+#define PROBE_INITIALIZE_STACK_ARG_OFFSET (3 * PTR_SIZE)
+#define PROBE_CONTEXT_STATE_SIZE (4 * PTR_SIZE)
+
+#define PROBE_FIRST_GPREG_OFFSET PROBE_CONTEXT_STATE_SIZE
+#define PROBE_CPU_X0_OFFSET (PROBE_FIRST_GPREG_OFFSET + (0 * GPREG_SIZE))
+#define PROBE_CPU_X1_OFFSET (PROBE_FIRST_GPREG_OFFSET + (1 * GPREG_SIZE))
+#define PROBE_CPU_X2_OFFSET (PROBE_FIRST_GPREG_OFFSET + (2 * GPREG_SIZE))
+#define PROBE_CPU_X3_OFFSET (PROBE_FIRST_GPREG_OFFSET + (3 * GPREG_SIZE))
+#define PROBE_CPU_X4_OFFSET (PROBE_FIRST_GPREG_OFFSET + (4 * GPREG_SIZE))
+#define PROBE_CPU_X5_OFFSET (PROBE_FIRST_GPREG_OFFSET + (5 * GPREG_SIZE))
+#define PROBE_CPU_X6_OFFSET (PROBE_FIRST_GPREG_OFFSET + (6 * GPREG_SIZE))
+#define PROBE_CPU_X7_OFFSET (PROBE_FIRST_GPREG_OFFSET + (7 * GPREG_SIZE))
+#define PROBE_CPU_X8_OFFSET (PROBE_FIRST_GPREG_OFFSET + (8 * GPREG_SIZE))
+#define PROBE_CPU_X9_OFFSET (PROBE_FIRST_GPREG_OFFSET + (9 * GPREG_SIZE))
+#define PROBE_CPU_X10_OFFSET (PROBE_FIRST_GPREG_OFFSET + (10 * GPREG_SIZE))
+#define PROBE_CPU_X11_OFFSET (PROBE_FIRST_GPREG_OFFSET + (11 * GPREG_SIZE))
+#define PROBE_CPU_X12_OFFSET (PROBE_FIRST_GPREG_OFFSET + (12 * GPREG_SIZE))
+#define PROBE_CPU_X13_OFFSET (PROBE_FIRST_GPREG_OFFSET + (13 * GPREG_SIZE))
+#define PROBE_CPU_X14_OFFSET (PROBE_FIRST_GPREG_OFFSET + (14 * GPREG_SIZE))
+#define PROBE_CPU_X15_OFFSET (PROBE_FIRST_GPREG_OFFSET + (15 * GPREG_SIZE))
+#define PROBE_CPU_X16_OFFSET (PROBE_FIRST_GPREG_OFFSET + (16 * GPREG_SIZE))
+#define PROBE_CPU_X17_OFFSET (PROBE_FIRST_GPREG_OFFSET + (17 * GPREG_SIZE))
+#define PROBE_CPU_X18_OFFSET (PROBE_FIRST_GPREG_OFFSET + (18 * GPREG_SIZE))
+#define PROBE_CPU_X19_OFFSET (PROBE_FIRST_GPREG_OFFSET + (19 * GPREG_SIZE))
+#define PROBE_CPU_X20_OFFSET (PROBE_FIRST_GPREG_OFFSET + (20 * GPREG_SIZE))
+#define PROBE_CPU_X21_OFFSET (PROBE_FIRST_GPREG_OFFSET + (21 * GPREG_SIZE))
+#define PROBE_CPU_X22_OFFSET (PROBE_FIRST_GPREG_OFFSET + (22 * GPREG_SIZE))
+#define PROBE_CPU_X23_OFFSET (PROBE_FIRST_GPREG_OFFSET + (23 * GPREG_SIZE))
+#define PROBE_CPU_X24_OFFSET (PROBE_FIRST_GPREG_OFFSET + (24 * GPREG_SIZE))
+#define PROBE_CPU_X25_OFFSET (PROBE_FIRST_GPREG_OFFSET + (25 * GPREG_SIZE))
+#define PROBE_CPU_X26_OFFSET (PROBE_FIRST_GPREG_OFFSET + (26 * GPREG_SIZE))
+#define PROBE_CPU_X27_OFFSET (PROBE_FIRST_GPREG_OFFSET + (27 * GPREG_SIZE))
+#define PROBE_CPU_X28_OFFSET (PROBE_FIRST_GPREG_OFFSET + (28 * GPREG_SIZE))
+#define PROBE_CPU_X29_OFFSET (PROBE_FIRST_GPREG_OFFSET + (29 * GPREG_SIZE))
+#define PROBE_CPU_X30_OFFSET (PROBE_FIRST_GPREG_OFFSET + (30 * GPREG_SIZE))
+#define PROBE_CPU_X31_OFFSET (PROBE_FIRST_GPREG_OFFSET + (31 * GPREG_SIZE))
+#define PROBE_CPU_GPREG_ARRAY_SIZE (32 * GPREG_SIZE)
+
+#define PROBE_FIRST_SPREG_OFFSET PROBE_CONTEXT_STATE_SIZE + PROBE_CPU_GPREG_ARRAY_SIZE
+#define PROBE_CPU_PC_OFFSET (PROBE_FIRST_SPREG_OFFSET + (0 * GPREG_SIZE))
+#define PROBE_CPU_SPREG_ARRAY_SIZE (1 * GPREG_SIZE)
+
+#define PROBE_FIRST_FPREG_OFFSET PROBE_CONTEXT_STATE_SIZE + PROBE_CPU_GPREG_ARRAY_SIZE + PROBE_CPU_SPREG_ARRAY_SIZE
+#define PROBE_CPU_F0_OFFSET (PROBE_FIRST_FPREG_OFFSET + (0 * FPREG_SIZE))
+#define PROBE_CPU_F1_OFFSET (PROBE_FIRST_FPREG_OFFSET + (1 * FPREG_SIZE))
+#define PROBE_CPU_F2_OFFSET (PROBE_FIRST_FPREG_OFFSET + (2 * FPREG_SIZE))
+#define PROBE_CPU_F3_OFFSET (PROBE_FIRST_FPREG_OFFSET + (3 * FPREG_SIZE))
+#define PROBE_CPU_F4_OFFSET (PROBE_FIRST_FPREG_OFFSET + (4 * FPREG_SIZE))
+#define PROBE_CPU_F5_OFFSET (PROBE_FIRST_FPREG_OFFSET + (5 * FPREG_SIZE))
+#define PROBE_CPU_F6_OFFSET (PROBE_FIRST_FPREG_OFFSET + (6 * FPREG_SIZE))
+#define PROBE_CPU_F7_OFFSET (PROBE_FIRST_FPREG_OFFSET + (7 * FPREG_SIZE))
+#define PROBE_CPU_F8_OFFSET (PROBE_FIRST_FPREG_OFFSET + (8 * FPREG_SIZE))
+#define PROBE_CPU_F9_OFFSET (PROBE_FIRST_FPREG_OFFSET + (9 * FPREG_SIZE))
+#define PROBE_CPU_F10_OFFSET (PROBE_FIRST_FPREG_OFFSET + (10 * FPREG_SIZE))
+#define PROBE_CPU_F11_OFFSET (PROBE_FIRST_FPREG_OFFSET + (11 * FPREG_SIZE))
+#define PROBE_CPU_F12_OFFSET (PROBE_FIRST_FPREG_OFFSET + (12 * FPREG_SIZE))
+#define PROBE_CPU_F13_OFFSET (PROBE_FIRST_FPREG_OFFSET + (13 * FPREG_SIZE))
+#define PROBE_CPU_F14_OFFSET (PROBE_FIRST_FPREG_OFFSET + (14 * FPREG_SIZE))
+#define PROBE_CPU_F15_OFFSET (PROBE_FIRST_FPREG_OFFSET + (15 * FPREG_SIZE))
+#define PROBE_CPU_F16_OFFSET (PROBE_FIRST_FPREG_OFFSET + (16 * FPREG_SIZE))
+#define PROBE_CPU_F17_OFFSET (PROBE_FIRST_FPREG_OFFSET + (17 * FPREG_SIZE))
+#define PROBE_CPU_F18_OFFSET (PROBE_FIRST_FPREG_OFFSET + (18 * FPREG_SIZE))
+#define PROBE_CPU_F19_OFFSET (PROBE_FIRST_FPREG_OFFSET + (19 * FPREG_SIZE))
+#define PROBE_CPU_F20_OFFSET (PROBE_FIRST_FPREG_OFFSET + (20 * FPREG_SIZE))
+#define PROBE_CPU_F21_OFFSET (PROBE_FIRST_FPREG_OFFSET + (21 * FPREG_SIZE))
+#define PROBE_CPU_F22_OFFSET (PROBE_FIRST_FPREG_OFFSET + (22 * FPREG_SIZE))
+#define PROBE_CPU_F23_OFFSET (PROBE_FIRST_FPREG_OFFSET + (23 * FPREG_SIZE))
+#define PROBE_CPU_F24_OFFSET (PROBE_FIRST_FPREG_OFFSET + (24 * FPREG_SIZE))
+#define PROBE_CPU_F25_OFFSET (PROBE_FIRST_FPREG_OFFSET + (25 * FPREG_SIZE))
+#define PROBE_CPU_F26_OFFSET (PROBE_FIRST_FPREG_OFFSET + (26 * FPREG_SIZE))
+#define PROBE_CPU_F27_OFFSET (PROBE_FIRST_FPREG_OFFSET + (27 * FPREG_SIZE))
+#define PROBE_CPU_F28_OFFSET (PROBE_FIRST_FPREG_OFFSET + (28 * FPREG_SIZE))
+#define PROBE_CPU_F29_OFFSET (PROBE_FIRST_FPREG_OFFSET + (29 * FPREG_SIZE))
+#define PROBE_CPU_F30_OFFSET (PROBE_FIRST_FPREG_OFFSET + (30 * FPREG_SIZE))
+#define PROBE_CPU_F31_OFFSET (PROBE_FIRST_FPREG_OFFSET + (31 * FPREG_SIZE))
+#define PROBE_CPU_FPREG_ARRAY_SIZE (32 * FPREG_SIZE)
+
+#define PROBE_SIZE (PROBE_CONTEXT_STATE_SIZE + PROBE_CPU_GPREG_ARRAY_SIZE + PROBE_CPU_SPREG_ARRAY_SIZE + PROBE_CPU_FPREG_ARRAY_SIZE)
+
+#define PROBE_SAVED_RETURN_PC_OFFSET PROBE_SIZE
+#define PROBE_SAVED_RETURN_PC_SIZE (1 * GPREG_SIZE)
+
+#define PROBE_OFFSETOF(x) offsetof(struct Probe::State, x)
+
+static_assert(PROBE_OFFSETOF(probeFunction) == PROBE_PROBE_FUNCTION_OFFSET);
+static_assert(PROBE_OFFSETOF(arg) == PROBE_ARG_OFFSET);
+static_assert(PROBE_OFFSETOF(initializeStackFunction) == PROBE_INITIALIZE_STACK_FUNCTION_OFFSET);
+static_assert(PROBE_OFFSETOF(initializeStackArg) == PROBE_INITIALIZE_STACK_ARG_OFFSET);
+
+static_assert(PROBE_OFFSETOF(cpu.gprs[RISCV64Registers::x0]) == PROBE_CPU_X0_OFFSET);
+static_assert(PROBE_OFFSETOF(cpu.gprs[RISCV64Registers::x1]) == PROBE_CPU_X1_OFFSET);
+static_assert(PROBE_OFFSETOF(cpu.gprs[RISCV64Registers::x2]) == PROBE_CPU_X2_OFFSET);
+static_assert(PROBE_OFFSETOF(cpu.gprs[RISCV64Registers::x3]) == PROBE_CPU_X3_OFFSET);
+static_assert(PROBE_OFFSETOF(cpu.gprs[RISCV64Registers::x4]) == PROBE_CPU_X4_OFFSET);
+static_assert(PROBE_OFFSETOF(cpu.gprs[RISCV64Registers::x5]) == PROBE_CPU_X5_OFFSET);
+static_assert(PROBE_OFFSETOF(cpu.gprs[RISCV64Registers::x6]) == PROBE_CPU_X6_OFFSET);
+static_assert(PROBE_OFFSETOF(cpu.gprs[RISCV64Registers::x7]) == PROBE_CPU_X7_OFFSET);
+static_assert(PROBE_OFFSETOF(cpu.gprs[RISCV64Registers::x8]) == PROBE_CPU_X8_OFFSET);
+static_assert(PROBE_OFFSETOF(cpu.gprs[RISCV64Registers::x9]) == PROBE_CPU_X9_OFFSET);
+static_assert(PROBE_OFFSETOF(cpu.gprs[RISCV64Registers::x10]) == PROBE_CPU_X10_OFFSET);
+static_assert(PROBE_OFFSETOF(cpu.gprs[RISCV64Registers::x11]) == PROBE_CPU_X11_OFFSET);
+static_assert(PROBE_OFFSETOF(cpu.gprs[RISCV64Registers::x12]) == PROBE_CPU_X12_OFFSET);
+static_assert(PROBE_OFFSETOF(cpu.gprs[RISCV64Registers::x13]) == PROBE_CPU_X13_OFFSET);
+static_assert(PROBE_OFFSETOF(cpu.gprs[RISCV64Registers::x14]) == PROBE_CPU_X14_OFFSET);
+static_assert(PROBE_OFFSETOF(cpu.gprs[RISCV64Registers::x15]) == PROBE_CPU_X15_OFFSET);
+static_assert(PROBE_OFFSETOF(cpu.gprs[RISCV64Registers::x16]) == PROBE_CPU_X16_OFFSET);
+static_assert(PROBE_OFFSETOF(cpu.gprs[RISCV64Registers::x17]) == PROBE_CPU_X17_OFFSET);
+static_assert(PROBE_OFFSETOF(cpu.gprs[RISCV64Registers::x18]) == PROBE_CPU_X18_OFFSET);
+static_assert(PROBE_OFFSETOF(cpu.gprs[RISCV64Registers::x19]) == PROBE_CPU_X19_OFFSET);
+static_assert(PROBE_OFFSETOF(cpu.gprs[RISCV64Registers::x20]) == PROBE_CPU_X20_OFFSET);
+static_assert(PROBE_OFFSETOF(cpu.gprs[RISCV64Registers::x21]) == PROBE_CPU_X21_OFFSET);
+static_assert(PROBE_OFFSETOF(cpu.gprs[RISCV64Registers::x22]) == PROBE_CPU_X22_OFFSET);
+static_assert(PROBE_OFFSETOF(cpu.gprs[RISCV64Registers::x23]) == PROBE_CPU_X23_OFFSET);
+static_assert(PROBE_OFFSETOF(cpu.gprs[RISCV64Registers::x24]) == PROBE_CPU_X24_OFFSET);
+static_assert(PROBE_OFFSETOF(cpu.gprs[RISCV64Registers::x25]) == PROBE_CPU_X25_OFFSET);
+static_assert(PROBE_OFFSETOF(cpu.gprs[RISCV64Registers::x26]) == PROBE_CPU_X26_OFFSET);
+static_assert(PROBE_OFFSETOF(cpu.gprs[RISCV64Registers::x27]) == PROBE_CPU_X27_OFFSET);
+static_assert(PROBE_OFFSETOF(cpu.gprs[RISCV64Registers::x28]) == PROBE_CPU_X28_OFFSET);
+static_assert(PROBE_OFFSETOF(cpu.gprs[RISCV64Registers::x29]) == PROBE_CPU_X29_OFFSET);
+static_assert(PROBE_OFFSETOF(cpu.gprs[RISCV64Registers::x30]) == PROBE_CPU_X30_OFFSET);
+static_assert(PROBE_OFFSETOF(cpu.gprs[RISCV64Registers::x31]) == PROBE_CPU_X31_OFFSET);
+
+static_assert(PROBE_OFFSETOF(cpu.sprs[RISCV64Registers::pc]) == PROBE_CPU_PC_OFFSET);
+
+static_assert(PROBE_OFFSETOF(cpu.fprs[RISCV64Registers::f0]) == PROBE_CPU_F0_OFFSET);
+static_assert(PROBE_OFFSETOF(cpu.fprs[RISCV64Registers::f1]) == PROBE_CPU_F1_OFFSET);
+static_assert(PROBE_OFFSETOF(cpu.fprs[RISCV64Registers::f2]) == PROBE_CPU_F2_OFFSET);
+static_assert(PROBE_OFFSETOF(cpu.fprs[RISCV64Registers::f3]) == PROBE_CPU_F3_OFFSET);
+static_assert(PROBE_OFFSETOF(cpu.fprs[RISCV64Registers::f4]) == PROBE_CPU_F4_OFFSET);
+static_assert(PROBE_OFFSETOF(cpu.fprs[RISCV64Registers::f5]) == PROBE_CPU_F5_OFFSET);
+static_assert(PROBE_OFFSETOF(cpu.fprs[RISCV64Registers::f6]) == PROBE_CPU_F6_OFFSET);
+static_assert(PROBE_OFFSETOF(cpu.fprs[RISCV64Registers::f7]) == PROBE_CPU_F7_OFFSET);
+static_assert(PROBE_OFFSETOF(cpu.fprs[RISCV64Registers::f8]) == PROBE_CPU_F8_OFFSET);
+static_assert(PROBE_OFFSETOF(cpu.fprs[RISCV64Registers::f9]) == PROBE_CPU_F9_OFFSET);
+static_assert(PROBE_OFFSETOF(cpu.fprs[RISCV64Registers::f10]) == PROBE_CPU_F10_OFFSET);
+static_assert(PROBE_OFFSETOF(cpu.fprs[RISCV64Registers::f11]) == PROBE_CPU_F11_OFFSET);
+static_assert(PROBE_OFFSETOF(cpu.fprs[RISCV64Registers::f12]) == PROBE_CPU_F12_OFFSET);
+static_assert(PROBE_OFFSETOF(cpu.fprs[RISCV64Registers::f13]) == PROBE_CPU_F13_OFFSET);
+static_assert(PROBE_OFFSETOF(cpu.fprs[RISCV64Registers::f14]) == PROBE_CPU_F14_OFFSET);
+static_assert(PROBE_OFFSETOF(cpu.fprs[RISCV64Registers::f15]) == PROBE_CPU_F15_OFFSET);
+static_assert(PROBE_OFFSETOF(cpu.fprs[RISCV64Registers::f16]) == PROBE_CPU_F16_OFFSET);
+static_assert(PROBE_OFFSETOF(cpu.fprs[RISCV64Registers::f17]) == PROBE_CPU_F17_OFFSET);
+static_assert(PROBE_OFFSETOF(cpu.fprs[RISCV64Registers::f18]) == PROBE_CPU_F18_OFFSET);
+static_assert(PROBE_OFFSETOF(cpu.fprs[RISCV64Registers::f19]) == PROBE_CPU_F19_OFFSET);
+static_assert(PROBE_OFFSETOF(cpu.fprs[RISCV64Registers::f20]) == PROBE_CPU_F20_OFFSET);
+static_assert(PROBE_OFFSETOF(cpu.fprs[RISCV64Registers::f21]) == PROBE_CPU_F21_OFFSET);
+static_assert(PROBE_OFFSETOF(cpu.fprs[RISCV64Registers::f22]) == PROBE_CPU_F22_OFFSET);
+static_assert(PROBE_OFFSETOF(cpu.fprs[RISCV64Registers::f23]) == PROBE_CPU_F23_OFFSET);
+static_assert(PROBE_OFFSETOF(cpu.fprs[RISCV64Registers::f24]) == PROBE_CPU_F24_OFFSET);
+static_assert(PROBE_OFFSETOF(cpu.fprs[RISCV64Registers::f25]) == PROBE_CPU_F25_OFFSET);
+static_assert(PROBE_OFFSETOF(cpu.fprs[RISCV64Registers::f26]) == PROBE_CPU_F26_OFFSET);
+static_assert(PROBE_OFFSETOF(cpu.fprs[RISCV64Registers::f27]) == PROBE_CPU_F27_OFFSET);
+static_assert(PROBE_OFFSETOF(cpu.fprs[RISCV64Registers::f28]) == PROBE_CPU_F28_OFFSET);
+static_assert(PROBE_OFFSETOF(cpu.fprs[RISCV64Registers::f29]) == PROBE_CPU_F29_OFFSET);
+static_assert(PROBE_OFFSETOF(cpu.fprs[RISCV64Registers::f30]) == PROBE_CPU_F30_OFFSET);
+static_assert(PROBE_OFFSETOF(cpu.fprs[RISCV64Registers::f31]) == PROBE_CPU_F31_OFFSET);
+
+static_assert(sizeof(Probe::State) == PROBE_SIZE);
+
+#define PROBE_ALIGNED_STACK_SIZE (PROBE_SIZE + PROBE_SAVED_RETURN_PC_SIZE)
+static_assert(!(PROBE_ALIGNED_STACK_SIZE & 0xf));
+
+struct IncomingProbeRecord {
+    UCPURegister x1;
+    UCPURegister x25;
+    UCPURegister x26;
+    UCPURegister x27;
+};
+
+#define IN_X1_OFFSET  (0 * GPREG_SIZE)
+#define IN_X25_OFFSET (1 * GPREG_SIZE)
+#define IN_X26_OFFSET (2 * GPREG_SIZE)
+#define IN_X27_OFFSET (3 * GPREG_SIZE)
+#define IN_SIZE       (4 * GPREG_SIZE)
+
+static_assert(offsetof(IncomingProbeRecord, x1) == IN_X1_OFFSET);
+static_assert(offsetof(IncomingProbeRecord, x25) == IN_X25_OFFSET);
+static_assert(offsetof(IncomingProbeRecord, x26) == IN_X26_OFFSET);
+static_assert(offsetof(IncomingProbeRecord, x27) == IN_X27_OFFSET);
+static_assert(sizeof(IncomingProbeRecord) == IN_SIZE);
+static_assert(!(IN_SIZE & 0xf));
+
+struct OutgoingProbeRecord {
+    UCPURegister x25;
+    UCPURegister x26;
+    UCPURegister x27;
+    UCPURegister x8;
+    UCPURegister x1;
+    UCPURegister padding;
+};
+
+#define OUT_X25_OFFSET (0 * GPREG_SIZE)
+#define OUT_X26_OFFSET (1 * GPREG_SIZE)
+#define OUT_X27_OFFSET (2 * GPREG_SIZE)
+#define OUT_X8_OFFSET  (3 * GPREG_SIZE)
+#define OUT_X1_OFFSET  (4 * GPREG_SIZE)
+#define OUT_SIZE       (6 * GPREG_SIZE)
+
+static_assert(offsetof(OutgoingProbeRecord, x25) == OUT_X25_OFFSET);
+static_assert(offsetof(OutgoingProbeRecord, x26) == OUT_X26_OFFSET);
+static_assert(offsetof(OutgoingProbeRecord, x27) == OUT_X27_OFFSET);
+static_assert(offsetof(OutgoingProbeRecord, x8) == OUT_X8_OFFSET);
+static_assert(offsetof(OutgoingProbeRecord, x1) == OUT_X1_OFFSET);
+static_assert(sizeof(OutgoingProbeRecord) == OUT_SIZE);
+static_assert(!(OUT_SIZE & 0xf));
+
+struct RARestorationRecord {
+    UCPURegister ra;
+    UCPURegister padding;
+};
+
+#define RA_RESTORATION_RA_OFFSET (0 * GPREG_SIZE)
+#define RA_RESTORATION_SIZE      (2 * GPREG_SIZE)
+
+static_assert(offsetof(RARestorationRecord, ra) == RA_RESTORATION_RA_OFFSET);
+static_assert(sizeof(RARestorationRecord) == RA_RESTORATION_SIZE);
+static_assert(!(RA_RESTORATION_SIZE & 0xf));
+
+asm(
+    ".text" "\n"
+    ".globl " SYMBOL_STRING(ctiMasmProbeTrampoline) "\n"
+    HIDE_SYMBOL(ctiMasmProbeTrampoline) "\n"
+    SYMBOL_STRING(ctiMasmProbeTrampoline) ":" "\n"
+
+    "mv x27, sp" "\n"
+    "addi sp, sp, " STRINGIZE_VALUE_OF(-(PROBE_ALIGNED_STACK_SIZE + OUT_SIZE)) "\n"
+
+    "sd x25, " STRINGIZE_VALUE_OF(PROBE_PROBE_FUNCTION_OFFSET) "(sp)" "\n"
+    "sd x26, " STRINGIZE_VALUE_OF(PROBE_ARG_OFFSET) "(sp)" "\n"
+
+    "addi x26, x27, " STRINGIZE_VALUE_OF(IN_SIZE) "\n"
+
+    // Move over the link register
+    "ld x25, " STRINGIZE_VALUE_OF(IN_X1_OFFSET) "(x27)" "\n"
+    "sd x25, " STRINGIZE_VALUE_OF(PROBE_CPU_X1_OFFSET) "(sp)" "\n"
+
+    // Insert the original sp value
+    "sd x26, " STRINGIZE_VALUE_OF(PROBE_CPU_X2_OFFSET) "(sp)" "\n"
+
+    // Also handle x25, x26 and x27
+    "ld x25, " STRINGIZE_VALUE_OF(IN_X25_OFFSET) "(x27)" "\n"
+    "sd x25, " STRINGIZE_VALUE_OF(PROBE_CPU_X25_OFFSET) "(sp)" "\n"
+    "ld x25, " STRINGIZE_VALUE_OF(IN_X26_OFFSET) "(x27)" "\n"
+    "sd x25, " STRINGIZE_VALUE_OF(PROBE_CPU_X26_OFFSET) "(sp)" "\n"
+    "ld x25, " STRINGIZE_VALUE_OF(IN_X27_OFFSET) "(x27)" "\n"
+    "sd x25, " STRINGIZE_VALUE_OF(PROBE_CPU_X27_OFFSET) "(sp)" "\n"
+
+    // x0 -- zero register, stored for completeness
+    "sd x0, " STRINGIZE_VALUE_OF(PROBE_CPU_X0_OFFSET) "(sp)" "\n"
+    // x1 -- return address register, handled above
+    // x2 -- stack pointer register, handled above
+    // x3 -- global pointer, not stored
+    // x4 -- thread pointer, not stored
+    "sd x5, " STRINGIZE_VALUE_OF(PROBE_CPU_X5_OFFSET) "(sp)" "\n"
+    "sd x6, " STRINGIZE_VALUE_OF(PROBE_CPU_X6_OFFSET) "(sp)" "\n"
+    "sd x7, " STRINGIZE_VALUE_OF(PROBE_CPU_X7_OFFSET) "(sp)" "\n"
+    "sd x8, " STRINGIZE_VALUE_OF(PROBE_CPU_X8_OFFSET) "(sp)" "\n"
+    "sd x9, " STRINGIZE_VALUE_OF(PROBE_CPU_X9_OFFSET) "(sp)" "\n"
+    "sd x10, " STRINGIZE_VALUE_OF(PROBE_CPU_X10_OFFSET) "(sp)" "\n"
+    "sd x11, " STRINGIZE_VALUE_OF(PROBE_CPU_X11_OFFSET) "(sp)" "\n"
+    "sd x12, " STRINGIZE_VALUE_OF(PROBE_CPU_X12_OFFSET) "(sp)" "\n"
+    "sd x13, " STRINGIZE_VALUE_OF(PROBE_CPU_X13_OFFSET) "(sp)" "\n"
+    "sd x14, " STRINGIZE_VALUE_OF(PROBE_CPU_X14_OFFSET) "(sp)" "\n"
+    "sd x15, " STRINGIZE_VALUE_OF(PROBE_CPU_X15_OFFSET) "(sp)" "\n"
+    "sd x16, " STRINGIZE_VALUE_OF(PROBE_CPU_X16_OFFSET) "(sp)" "\n"
+    "sd x17, " STRINGIZE_VALUE_OF(PROBE_CPU_X17_OFFSET) "(sp)" "\n"
+    "sd x18, " STRINGIZE_VALUE_OF(PROBE_CPU_X18_OFFSET) "(sp)" "\n"
+    "sd x19, " STRINGIZE_VALUE_OF(PROBE_CPU_X19_OFFSET) "(sp)" "\n"
+    "sd x20, " STRINGIZE_VALUE_OF(PROBE_CPU_X20_OFFSET) "(sp)" "\n"
+    "sd x21, " STRINGIZE_VALUE_OF(PROBE_CPU_X21_OFFSET) "(sp)" "\n"
+    "sd x22, " STRINGIZE_VALUE_OF(PROBE_CPU_X22_OFFSET) "(sp)" "\n"
+    "sd x23, " STRINGIZE_VALUE_OF(PROBE_CPU_X23_OFFSET) "(sp)" "\n"
+    "sd x24, " STRINGIZE_VALUE_OF(PROBE_CPU_X24_OFFSET) "(sp)" "\n"
+    // x25 -- incoming probe member, handled above
+    // x26 -- incoming probe member, handled above
+    // x27 -- incoming probe member, handled above
+    "sd x28, " STRINGIZE_VALUE_OF(PROBE_CPU_X28_OFFSET) "(sp)" "\n"
+    "sd x29, " STRINGIZE_VALUE_OF(PROBE_CPU_X29_OFFSET) "(sp)" "\n"
+    "sd x30, " STRINGIZE_VALUE_OF(PROBE_CPU_X30_OFFSET) "(sp)" "\n"
+    "sd x31, " STRINGIZE_VALUE_OF(PROBE_CPU_X31_OFFSET) "(sp)" "\n"
+
+    "fsd f0, " STRINGIZE_VALUE_OF(PROBE_CPU_F0_OFFSET) "(sp)" "\n"
+    "fsd f1, " STRINGIZE_VALUE_OF(PROBE_CPU_F1_OFFSET) "(sp)" "\n"
+    "fsd f2, " STRINGIZE_VALUE_OF(PROBE_CPU_F2_OFFSET) "(sp)" "\n"
+    "fsd f3, " STRINGIZE_VALUE_OF(PROBE_CPU_F3_OFFSET) "(sp)" "\n"
+    "fsd f4, " STRINGIZE_VALUE_OF(PROBE_CPU_F4_OFFSET) "(sp)" "\n"
+    "fsd f5, " STRINGIZE_VALUE_OF(PROBE_CPU_F5_OFFSET) "(sp)" "\n"
+    "fsd f6, " STRINGIZE_VALUE_OF(PROBE_CPU_F6_OFFSET) "(sp)" "\n"
+    "fsd f7, " STRINGIZE_VALUE_OF(PROBE_CPU_F7_OFFSET) "(sp)" "\n"
+    "fsd f8, " STRINGIZE_VALUE_OF(PROBE_CPU_F8_OFFSET) "(sp)" "\n"
+    "fsd f9, " STRINGIZE_VALUE_OF(PROBE_CPU_F9_OFFSET) "(sp)" "\n"
+    "fsd f10, " STRINGIZE_VALUE_OF(PROBE_CPU_F10_OFFSET) "(sp)" "\n"
+    "fsd f11, " STRINGIZE_VALUE_OF(PROBE_CPU_F11_OFFSET) "(sp)" "\n"
+    "fsd f12, " STRINGIZE_VALUE_OF(PROBE_CPU_F12_OFFSET) "(sp)" "\n"
+    "fsd f13, " STRINGIZE_VALUE_OF(PROBE_CPU_F13_OFFSET) "(sp)" "\n"
+    "fsd f14, " STRINGIZE_VALUE_OF(PROBE_CPU_F14_OFFSET) "(sp)" "\n"
+    "fsd f15, " STRINGIZE_VALUE_OF(PROBE_CPU_F15_OFFSET) "(sp)" "\n"
+    "fsd f16, " STRINGIZE_VALUE_OF(PROBE_CPU_F16_OFFSET) "(sp)" "\n"
+    "fsd f17, " STRINGIZE_VALUE_OF(PROBE_CPU_F17_OFFSET) "(sp)" "\n"
+    "fsd f18, " STRINGIZE_VALUE_OF(PROBE_CPU_F18_OFFSET) "(sp)" "\n"
+    "fsd f19, " STRINGIZE_VALUE_OF(PROBE_CPU_F19_OFFSET) "(sp)" "\n"
+    "fsd f20, " STRINGIZE_VALUE_OF(PROBE_CPU_F20_OFFSET) "(sp)" "\n"
+    "fsd f21, " STRINGIZE_VALUE_OF(PROBE_CPU_F21_OFFSET) "(sp)" "\n"
+    "fsd f22, " STRINGIZE_VALUE_OF(PROBE_CPU_F22_OFFSET) "(sp)" "\n"
+    "fsd f23, " STRINGIZE_VALUE_OF(PROBE_CPU_F23_OFFSET) "(sp)" "\n"
+    "fsd f24, " STRINGIZE_VALUE_OF(PROBE_CPU_F24_OFFSET) "(sp)" "\n"
+    "fsd f25, " STRINGIZE_VALUE_OF(PROBE_CPU_F25_OFFSET) "(sp)" "\n"
+    "fsd f26, " STRINGIZE_VALUE_OF(PROBE_CPU_F26_OFFSET) "(sp)" "\n"
+    "fsd f27, " STRINGIZE_VALUE_OF(PROBE_CPU_F27_OFFSET) "(sp)" "\n"
+    "fsd f28, " STRINGIZE_VALUE_OF(PROBE_CPU_F28_OFFSET) "(sp)" "\n"
+    "fsd f29, " STRINGIZE_VALUE_OF(PROBE_CPU_F29_OFFSET) "(sp)" "\n"
+    "fsd f30, " STRINGIZE_VALUE_OF(PROBE_CPU_F30_OFFSET) "(sp)" "\n"
+    "fsd f31, " STRINGIZE_VALUE_OF(PROBE_CPU_F31_OFFSET) "(sp)" "\n"
+
+    "sd ra, " STRINGIZE_VALUE_OF(PROBE_SAVED_RETURN_PC_OFFSET) "(sp)" "\n"
+    "sd ra, " STRINGIZE_VALUE_OF(PROBE_CPU_PC_OFFSET) "(sp)" "\n"
+
+    "mv x27, sp" "\n"
+
+    "mv x10, sp" "\n"
+    "la ra, " SYMBOL_STRING(executeJSCJITProbe) "\n"
+    "jalr ra" "\n"
+
+    "ld x25, " STRINGIZE_VALUE_OF(PROBE_CPU_X2_OFFSET) "(x27)" "\n"
+    "addi x26, x27, " STRINGIZE_VALUE_OF(PROBE_ALIGNED_STACK_SIZE + OUT_SIZE) "\n"
+    "bge x25, x26, " LOCAL_LABEL_STRING(ctiMasmProbeTrampolineProbeStateIsSafe) "\n"
+
+    "addi x25, x25, " STRINGIZE_VALUE_OF(-(PROBE_ALIGNED_STACK_SIZE + OUT_SIZE)) "\n"
+    "andi x25, x25, -16" "\n"
+    "mv sp, x25" "\n"
+
+    "mv x28, x27" "\n"
+    "mv x29, x25" "\n"
+    "addi x30, x28, " STRINGIZE_VALUE_OF(PROBE_ALIGNED_STACK_SIZE) "\n"
+
+    LOCAL_LABEL_STRING(ctiMasmProbeTrampolineCopyLoop) ":" "\n"
+    "ld x31, 0(x28)" "\n"
+    "sd x31, 0(x29)" "\n"
+    "addi x28, x28, " STRINGIZE_VALUE_OF(GPREG_SIZE) "\n"
+    "addi x29, x29, " STRINGIZE_VALUE_OF(GPREG_SIZE) "\n"
+    "blt x28, x30, " LOCAL_LABEL_STRING(ctiMasmProbeTrampolineCopyLoop) "\n"
+
+    "mv x27, x25" "\n"
+
+    LOCAL_LABEL_STRING(ctiMasmProbeTrampolineProbeStateIsSafe) ":" "\n"
+
+    // Call initializeStackFunction, if present
+    "ld x26, " STRINGIZE_VALUE_OF(PROBE_INITIALIZE_STACK_FUNCTION_OFFSET) "(x27)" "\n"
+    "beqz x26, " LOCAL_LABEL_STRING(ctiMasmProbeTrampolineRestoreRegisters) "\n"
+    "mv x10, x27" "\n"
+    "jalr x26" "\n"
+
+    LOCAL_LABEL_STRING(ctiMasmProbeTrampolineRestoreRegisters) ":" "\n"
+    "mv sp, x27" "\n"
+
+    "fld f0, " STRINGIZE_VALUE_OF(PROBE_CPU_F0_OFFSET) "(sp)" "\n"
+    "fld f1, " STRINGIZE_VALUE_OF(PROBE_CPU_F1_OFFSET) "(sp)" "\n"
+    "fld f2, " STRINGIZE_VALUE_OF(PROBE_CPU_F2_OFFSET) "(sp)" "\n"
+    "fld f3, " STRINGIZE_VALUE_OF(PROBE_CPU_F3_OFFSET) "(sp)" "\n"
+    "fld f4, " STRINGIZE_VALUE_OF(PROBE_CPU_F4_OFFSET) "(sp)" "\n"
+    "fld f5, " STRINGIZE_VALUE_OF(PROBE_CPU_F5_OFFSET) "(sp)" "\n"
+    "fld f6, " STRINGIZE_VALUE_OF(PROBE_CPU_F6_OFFSET) "(sp)" "\n"
+    "fld f7, " STRINGIZE_VALUE_OF(PROBE_CPU_F7_OFFSET) "(sp)" "\n"
+    "fld f8, " STRINGIZE_VALUE_OF(PROBE_CPU_F8_OFFSET) "(sp)" "\n"
+    "fld f9, " STRINGIZE_VALUE_OF(PROBE_CPU_F9_OFFSET) "(sp)" "\n"
+    "fld f10, " STRINGIZE_VALUE_OF(PROBE_CPU_F10_OFFSET) "(sp)" "\n"
+    "fld f11, " STRINGIZE_VALUE_OF(PROBE_CPU_F11_OFFSET) "(sp)" "\n"
+    "fld f12, " STRINGIZE_VALUE_OF(PROBE_CPU_F12_OFFSET) "(sp)" "\n"
+    "fld f13, " STRINGIZE_VALUE_OF(PROBE_CPU_F13_OFFSET) "(sp)" "\n"
+    "fld f14, " STRINGIZE_VALUE_OF(PROBE_CPU_F14_OFFSET) "(sp)" "\n"
+    "fld f15, " STRINGIZE_VALUE_OF(PROBE_CPU_F15_OFFSET) "(sp)" "\n"
+    "fld f16, " STRINGIZE_VALUE_OF(PROBE_CPU_F16_OFFSET) "(sp)" "\n"
+    "fld f17, " STRINGIZE_VALUE_OF(PROBE_CPU_F17_OFFSET) "(sp)" "\n"
+    "fld f18, " STRINGIZE_VALUE_OF(PROBE_CPU_F18_OFFSET) "(sp)" "\n"
+    "fld f19, " STRINGIZE_VALUE_OF(PROBE_CPU_F19_OFFSET) "(sp)" "\n"
+    "fld f20, " STRINGIZE_VALUE_OF(PROBE_CPU_F20_OFFSET) "(sp)" "\n"
+    "fld f21, " STRINGIZE_VALUE_OF(PROBE_CPU_F21_OFFSET) "(sp)" "\n"
+    "fld f22, " STRINGIZE_VALUE_OF(PROBE_CPU_F22_OFFSET) "(sp)" "\n"
+    "fld f23, " STRINGIZE_VALUE_OF(PROBE_CPU_F23_OFFSET) "(sp)" "\n"
+    "fld f24, " STRINGIZE_VALUE_OF(PROBE_CPU_F24_OFFSET) "(sp)" "\n"
+    "fld f25, " STRINGIZE_VALUE_OF(PROBE_CPU_F25_OFFSET) "(sp)" "\n"
+    "fld f26, " STRINGIZE_VALUE_OF(PROBE_CPU_F26_OFFSET) "(sp)" "\n"
+    "fld f27, " STRINGIZE_VALUE_OF(PROBE_CPU_F27_OFFSET) "(sp)" "\n"
+    "fld f28, " STRINGIZE_VALUE_OF(PROBE_CPU_F28_OFFSET) "(sp)" "\n"
+    "fld f29, " STRINGIZE_VALUE_OF(PROBE_CPU_F29_OFFSET) "(sp)" "\n"
+    "fld f30, " STRINGIZE_VALUE_OF(PROBE_CPU_F30_OFFSET) "(sp)" "\n"
+    "fld f31, " STRINGIZE_VALUE_OF(PROBE_CPU_F31_OFFSET) "(sp)" "\n"
+
+    // x0 -- zero register, loaded for completeness
+    "ld x0, " STRINGIZE_VALUE_OF(PROBE_CPU_X0_OFFSET) "(sp)" "\n"
+    // x1 -- return address register, loaded at the end
+    // x2 -- stack pointer register, loaded at the end
+    // x3 -- global pointer, not loaded
+    // x4 -- thread pointer, not loaded
+    "ld x5, " STRINGIZE_VALUE_OF(PROBE_CPU_X5_OFFSET) "(sp)" "\n"
+    "ld x6, " STRINGIZE_VALUE_OF(PROBE_CPU_X6_OFFSET) "(sp)" "\n"
+    "ld x7, " STRINGIZE_VALUE_OF(PROBE_CPU_X7_OFFSET) "(sp)" "\n"
+    "ld x8, " STRINGIZE_VALUE_OF(PROBE_CPU_X8_OFFSET) "(sp)" "\n"
+    "ld x9, " STRINGIZE_VALUE_OF(PROBE_CPU_X9_OFFSET) "(sp)" "\n"
+    "ld x10, " STRINGIZE_VALUE_OF(PROBE_CPU_X10_OFFSET) "(sp)" "\n"
+    "ld x11, " STRINGIZE_VALUE_OF(PROBE_CPU_X11_OFFSET) "(sp)" "\n"
+    "ld x12, " STRINGIZE_VALUE_OF(PROBE_CPU_X12_OFFSET) "(sp)" "\n"
+    "ld x13, " STRINGIZE_VALUE_OF(PROBE_CPU_X13_OFFSET) "(sp)" "\n"
+    "ld x14, " STRINGIZE_VALUE_OF(PROBE_CPU_X14_OFFSET) "(sp)" "\n"
+    "ld x15, " STRINGIZE_VALUE_OF(PROBE_CPU_X15_OFFSET) "(sp)" "\n"
+    "ld x16, " STRINGIZE_VALUE_OF(PROBE_CPU_X16_OFFSET) "(sp)" "\n"
+    "ld x17, " STRINGIZE_VALUE_OF(PROBE_CPU_X17_OFFSET) "(sp)" "\n"
+    "ld x18, " STRINGIZE_VALUE_OF(PROBE_CPU_X18_OFFSET) "(sp)" "\n"
+    "ld x19, " STRINGIZE_VALUE_OF(PROBE_CPU_X19_OFFSET) "(sp)" "\n"
+    "ld x20, " STRINGIZE_VALUE_OF(PROBE_CPU_X20_OFFSET) "(sp)" "\n"
+    "ld x21, " STRINGIZE_VALUE_OF(PROBE_CPU_X21_OFFSET) "(sp)" "\n"
+    "ld x22, " STRINGIZE_VALUE_OF(PROBE_CPU_X22_OFFSET) "(sp)" "\n"
+    "ld x23, " STRINGIZE_VALUE_OF(PROBE_CPU_X23_OFFSET) "(sp)" "\n"
+    "ld x24, " STRINGIZE_VALUE_OF(PROBE_CPU_X24_OFFSET) "(sp)" "\n"
+    "ld x28, " STRINGIZE_VALUE_OF(PROBE_CPU_X28_OFFSET) "(sp)" "\n"
+    "ld x29, " STRINGIZE_VALUE_OF(PROBE_CPU_X29_OFFSET) "(sp)" "\n"
+    "ld x30, " STRINGIZE_VALUE_OF(PROBE_CPU_X30_OFFSET) "(sp)" "\n"
+    "ld x31, " STRINGIZE_VALUE_OF(PROBE_CPU_X31_OFFSET) "(sp)" "\n"
+
+    "ld x25, " STRINGIZE_VALUE_OF(PROBE_CPU_X2_OFFSET) "(sp)" "\n"
+    "ld x26, " STRINGIZE_VALUE_OF(PROBE_SAVED_RETURN_PC_OFFSET) "(sp)" "\n"
+    "ld x27, " STRINGIZE_VALUE_OF(PROBE_CPU_PC_OFFSET) "(sp)" "\n"
+    "bne x26, x27, " LOCAL_LABEL_STRING(ctiMasmProbeTrampolineEnd) "\n"
+
+    "addi x25, x25, " STRINGIZE_VALUE_OF(-RA_RESTORATION_SIZE) "\n"
+    "ld x27, " STRINGIZE_VALUE_OF(PROBE_CPU_X1_OFFSET) "(sp)" "\n"
+    "sd x27, " STRINGIZE_VALUE_OF(RA_RESTORATION_RA_OFFSET) "(x25)" "\n"
+
+    LOCAL_LABEL_STRING(ctiMasmProbeTrampolineEnd) ":" "\n"
+
+    "addi x25, x25, " STRINGIZE_VALUE_OF(-OUT_SIZE) "\n"
+
+    "ld x27, " STRINGIZE_VALUE_OF(PROBE_CPU_X25_OFFSET) "(sp)" "\n"
+    "sd x27, " STRINGIZE_VALUE_OF(OUT_X25_OFFSET) "(x25)" "\n"
+    "ld x27, " STRINGIZE_VALUE_OF(PROBE_CPU_X26_OFFSET) "(sp)" "\n"
+    "sd x27, " STRINGIZE_VALUE_OF(OUT_X26_OFFSET) "(x25)" "\n"
+    "ld x27, " STRINGIZE_VALUE_OF(PROBE_CPU_X27_OFFSET) "(sp)" "\n"
+    "sd x27, " STRINGIZE_VALUE_OF(OUT_X27_OFFSET) "(x25)" "\n"
+    "ld x27, " STRINGIZE_VALUE_OF(PROBE_CPU_X8_OFFSET) "(sp)" "\n"
+    "sd x27, " STRINGIZE_VALUE_OF(OUT_X8_OFFSET) "(x25)" "\n"
+    "ld x27, " STRINGIZE_VALUE_OF(PROBE_CPU_PC_OFFSET) "(sp)" "\n"
+    "sd x27, " STRINGIZE_VALUE_OF(OUT_X1_OFFSET) "(x25)" "\n"
+
+    "mv sp, x25" "\n"
+    "ld x25, " STRINGIZE_VALUE_OF(OUT_X25_OFFSET) "(sp)" "\n"
+    "ld x26, " STRINGIZE_VALUE_OF(OUT_X26_OFFSET) "(sp)" "\n"
+    "ld x27, " STRINGIZE_VALUE_OF(OUT_X27_OFFSET) "(sp)" "\n"
+    "ld ra, " STRINGIZE_VALUE_OF(OUT_X1_OFFSET) "(sp)" "\n"
+    "addi sp, sp, " STRINGIZE_VALUE_OF(OUT_SIZE) "\n"
+
+    "ret" "\n");
+
+void MacroAssembler::probe(Probe::Function function, void* arg)
 {
-    // TODO
+    sub64(TrustedImm32(sizeof(IncomingProbeRecord)), sp);
+    store64(ra, Address(sp, offsetof(IncomingProbeRecord, x1)));
+    store64(x25, Address(sp, offsetof(IncomingProbeRecord, x25)));
+    store64(x26, Address(sp, offsetof(IncomingProbeRecord, x26)));
+    store64(x27, Address(sp, offsetof(IncomingProbeRecord, x27)));
+
+    move(TrustedImmPtr(tagCFunction<OperationPtrTag>(ctiMasmProbeTrampoline)), x27);
+    move(TrustedImmPtr(reinterpret_cast<void*>(function)), x25);
+    move(TrustedImmPtr(arg), x26);
+    call(x27, OperationPtrTag);
+
+    load64(Address(sp, offsetof(RARestorationRecord, ra)), ra);
+    add64(TrustedImm32(sizeof(RARestorationRecord)), sp);
 }
 
 } // namespace JSC

_______________________________________________
webkit-changes mailing list
webkit-changes@lists.webkit.org
https://lists.webkit.org/mailman/listinfo/webkit-changes

Reply via email to