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style: put the repository assembly in gasm fmt canonical form

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Assisted-by: GLM 5.3 Flash
This commit is contained in:
petrbalvin
2026-09-17 20:33:18 +02:00
parent 0b42ce7952
commit 03d6d4da54
26 changed files with 583 additions and 542 deletions
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verify/abi_arm64.s
+30 -27
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@@ -21,12 +21,12 @@
// cannot cover it.
// Sentinel values chosen to be unlikely in normal execution.
#define SENTINEL_FP 0xDEADBEEFCAFEF00D
#define SENTINEL_G 0x0BADF00DDEADBEEF
#define SENTINEL_FP 0xDEADBEEFCAFEF00D
#define SENTINEL_G 0x0BADF00DDEADBEEF
// GLOBL holding the raw address of the leave trampoline, read by Go.
GLOBL ·leaveCheckedPtr(SB), NOPTR, $8
DATA ·leaveCheckedPtr(SB)/8, $·leaveJITCheckedRaw(SB)
DATA ·leaveCheckedPtr(SB)/8, $·leaveJITCheckedRaw(SB)
// func enterJITChecked(fn uintptr, stack uintptr)
// Sets sentinels in R29, R28 and R18, switches to the prepared stack and
@@ -34,26 +34,26 @@ DATA ·leaveCheckedPtr(SB)/8, $·leaveJITCheckedRaw(SB)
// leaveJITCheckedRaw (read from leaveCheckedPtr). Only R0 and R3 are used
// as scratch: caller-saved, and not among the checked registers.
TEXT ·enterJITChecked(SB), NOSPLIT, $0-16
MOVD fn+0(FP), R0 // target (before SP switch)
MOVD R30, savedLR(SB) // save link register
MOVD R3, savedSP(SB) // save Go stack pointer
MOVD R29, savedFP(SB) // save frame pointer (vet requires save before clobber)
MOVD g, savedG(SB) // save g
MOVD $SENTINEL_FP, R29 // sentinel in the frame pointer
MOVD $SENTINEL_G, g // sentinel in g
MOVD stack+8(FP), R3 // load prepared stack pointer
MOVD 0(R3), R30 // load leaveJITCheckedRaw into LR
MOVD R3, RSP // SP stays on the leave slot: the kernel
// reads its first argument at SP+8
JMP (R0) // branch to JIT function
MOVD fn+0(FP), R0 // target (before SP switch)
MOVD R30, savedLR(SB) // save link register
MOVD R3, savedSP(SB) // save Go stack pointer
MOVD R29, savedFP(SB) // save frame pointer (vet requires save before clobber)
MOVD g, savedG(SB) // save g
MOVD $SENTINEL_FP, R29 // sentinel in the frame pointer
MOVD $SENTINEL_G, g // sentinel in g
MOVD stack+8(FP), R3 // load prepared stack pointer
MOVD 0(R3), R30 // load leaveJITCheckedRaw into LR
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
// declaration, so no ABIInternal wrapper is generated; the JIT function's
// RET lands here directly, seeing R29 and g exactly as the function left
// them. It checks the sentinels, records violations in abiResult, then
// restores the Go stack and returns.
// leaveJITCheckedRaw is the raw return trampoline. It has NO Go function
// declaration, so no ABIInternal wrapper is generated; the JIT function's
// RET lands here directly, seeing R29 and g exactly as the function left
// them. It checks the sentinels, records violations in abiResult, then
// restores the Go stack and returns.
TEXT ·leaveJITCheckedRaw(SB), NOSPLIT, $0-0
MOVD $0, R4 // accumulated violation bits
MOVD $0, R4 // accumulated violation bits
// Check the frame pointer against the sentinel.
MOVD $SENTINEL_FP, R3
@@ -61,6 +61,7 @@ TEXT ·leaveJITCheckedRaw(SB), NOSPLIT, $0-0
BEQ fp_ok
MOVD $1, R5
ORR R5, R4, R4
fp_ok:
// Check g against the sentinel.
MOVD $SENTINEL_G, R3
@@ -68,22 +69,24 @@ fp_ok:
BEQ g_ok
MOVD $2, R5
ORR R5, R4, R4
g_ok:
CBZ R4, restore
MOVD R4, ·abiResult(SB)
restore:
MOVD savedSP(SB), R3 // restore Go stack pointer
MOVD savedSP(SB), R3 // restore Go stack pointer
MOVD R3, RSP
MOVD savedLR(SB), R30 // restore link register
MOVD savedFP(SB), R29 // restore frame pointer: Go code needs it the
// moment it resumes, violation or not
MOVD savedG(SB), g // restore g
RET // return to Go caller
MOVD savedLR(SB), R30 // restore link register
MOVD savedFP(SB), R29 // restore frame pointer: Go code needs it the
// moment it resumes, violation or not
MOVD savedG(SB), g // restore g
RET // return to Go caller
// Package-level storage for the saved frame pointer. Like savedSP and
// savedLR in trampoline_arm64.s, this is assembly-side state: the amd64
// checked trampoline saves the caller's frame pointer for vet's sake and
// never restores it, and this file mirrors that.
GLOBL savedFP(SB), NOPTR, $8
GLOBL savedG(SB), NOPTR, $8