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fix(verify): fix non-amd64 JIT trampolines and validate under qemu

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petrbalvin
2026-08-31 12:34:50 +02:00
parent a5a59d6503
commit 94c4756d47
10 changed files with 77 additions and 43 deletions
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verify/abi_arm64.s
+2 -2
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@@ -43,8 +43,8 @@ TEXT ·enterJITChecked(SB), NOSPLIT, $0-16
MOVD $SENTINEL_G, g // sentinel in g
MOVD stack+8(FP), R3 // load prepared stack pointer
MOVD 0(R3), R30 // load leaveJITCheckedRaw into LR
ADD $8, R3, R3 // advance past the return slot
MOVD R3, RSP // switch to prepared stack
MOVD R3, RSP // SP stays on the leave slot: the kernel
// reads its first argument at SP+8
JMP (R0) // branch to JIT function
// leaveJITCheckedRaw is the raw return trampoline. It has NO Go function
verify/abi_loong64.s
+2 -2
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@@ -37,8 +37,8 @@ TEXT ·enterJITChecked(SB), NOSPLIT, $0-16
MOVV $SENTINEL_G, g // sentinel in g
MOVV stack+8(FP), R5 // load prepared stack pointer (A1)
MOVV 0(R5), R1 // load leaveJITCheckedRaw into RA
ADDV $8, R5, R5 // advance past the return slot
MOVV R5, R3 // switch to prepared stack (SP)
MOVV R5, R3 // SP stays on the leave slot: the kernel
// reads its first argument at SP+8
JIRL R0, R4, 0 // jump to JIT function
// leaveJITCheckedRaw is the raw return trampoline. It has NO Go function
verify/abi_riscv64.s
+2 -2
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@@ -37,8 +37,8 @@ TEXT ·enterJITChecked(SB), NOSPLIT, $0-16
MOV $SENTINEL_G, g // sentinel in g
MOV stack+8(FP), X6 // load prepared stack pointer (T1)
LD 0(X6), X1 // load leaveJITCheckedRaw into RA
ADD $8, X6, X6 // advance past the return slot
MOV X6, X2 // switch to prepared stack (SP)
MOV X6, X2 // SP stays on the leave slot: the kernel
// reads its first argument at SP+8
JALR X0, 0(X5) // jump to JIT function
// leaveJITCheckedRaw is the raw return trampoline. It has NO Go function
verify/trampoline_arm64.s
+5 -2
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@@ -20,8 +20,11 @@ TEXT ·enterJIT(SB), NOSPLIT, $0-16
MOVD R3, savedSP(SB) // save Go stack pointer
MOVD stack+8(FP), R3 // load prepared stack pointer
MOVD 0(R3), R30 // load leaveJIT address into LR
ADD $8, R3, R3 // advance past return address
MOVD R3, RSP // switch to prepared stack
MOVD R3, RSP // switch to the prepared stack: SP stays on
// the leave slot, so the kernel reads its
// first argument at SP+8 per the frame
// convention (amd64 lays the stack out the
// same way)
JMP (R0) // branch to JIT function
// func leaveJIT()
verify/trampoline_loong64.s
+3 -2
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@@ -16,8 +16,9 @@ TEXT ·enterJIT(SB), NOSPLIT, $0-16
MOVV R3, savedSP(SB) // save Go stack pointer (SP)
MOVV stack+8(FP), R5 // load prepared stack pointer (A1)
MOVV 0(R5), R1 // load leaveJIT address into RA
ADDV $8, R5, R5 // advance past return address
MOVV R5, R3 // switch to prepared stack (SP)
MOVV R5, R3 // switch to the prepared stack: SP stays on
// the leave slot, so the kernel reads its
// first argument at SP+8
JIRL R0, R4, 0 // jump to JIT function
// func leaveJIT()
verify/trampoline_riscv64.s
+3 -2
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@@ -16,8 +16,9 @@ TEXT ·enterJIT(SB), NOSPLIT, $0-16
MOV X2, savedSP(SB) // save Go stack pointer
MOV stack+8(FP), X6 // load prepared stack pointer (T1)
LD 0(X6), X1 // load leaveJIT address into RA
ADD $8, X6, X6 // advance past return address
MOV X6, X2 // switch to prepared stack (SP)
MOV X6, X2 // switch to the prepared stack: SP stays on
// the leave slot, so the kernel reads its
// first argument at SP+8
JALR X0, 0(X5) // jump to JIT function
// func leaveJIT()