asan_ppc64le.s

Documentation: runtime

     1// Copyright 2022 The Go Authors. All rights reserved.
     2// Use of this source code is governed by a BSD-style
     3// license that can be found in the LICENSE file.
     4
     5//go:build asan
     6
     7#include "go_asm.h"
     8#include "textflag.h"
     9
    10#define RARG0 R3
    11#define RARG1 R4
    12#define RARG2 R5
    13#define RARG3 R6
    14#define FARG R12
    15
    16// Called from instrumented code.
    17// func runtime·doasanread(addr unsafe.Pointer, sz, sp, pc uintptr)
    18TEXT	runtime·doasanread(SB),NOSPLIT|NOFRAME,$0-32
    19	MOVD	addr+0(FP), RARG0
    20	MOVD	sz+8(FP), RARG1
    21	MOVD	sp+16(FP), RARG2
    22	MOVD	pc+24(FP), RARG3
    23	// void __asan_read_go(void *addr, uintptr_t sz, void *sp, void *pc);
    24	MOVD	$__asan_read_go(SB), FARG
    25	BR	asancall<>(SB)
    26
    27// func runtime·doasanwrite(addr unsafe.Pointer, sz, sp, pc uintptr)
    28TEXT	runtime·doasanwrite(SB),NOSPLIT|NOFRAME,$0-32
    29	MOVD	addr+0(FP), RARG0
    30	MOVD	sz+8(FP), RARG1
    31	MOVD	sp+16(FP), RARG2
    32	MOVD	pc+24(FP), RARG3
    33	// void __asan_write_go(void *addr, uintptr_t sz, void *sp, void *pc);
    34	MOVD	$__asan_write_go(SB), FARG
    35	BR	asancall<>(SB)
    36
    37// func runtime·asanunpoison(addr unsafe.Pointer, sz uintptr)
    38TEXT	runtime·asanunpoison(SB),NOSPLIT|NOFRAME,$0-16
    39	MOVD	addr+0(FP), RARG0
    40	MOVD	sz+8(FP), RARG1
    41	// void __asan_unpoison_go(void *addr, uintptr_t sz);
    42	MOVD	$__asan_unpoison_go(SB), FARG
    43	BR	asancall<>(SB)
    44
    45// func runtime·asanpoison(addr unsafe.Pointer, sz uintptr)
    46TEXT	runtime·asanpoison(SB),NOSPLIT|NOFRAME,$0-16
    47	MOVD	addr+0(FP), RARG0
    48	MOVD	sz+8(FP), RARG1
    49	// void __asan_poison_go(void *addr, uintptr_t sz);
    50	MOVD	$__asan_poison_go(SB), FARG
    51	BR	asancall<>(SB)
    52
    53// func runtime·asanregisterglobals(addr unsafe.Pointer, n uintptr)
    54TEXT	runtime·asanregisterglobals(SB),NOSPLIT|NOFRAME,$0-16
    55	MOVD	addr+0(FP), RARG0
    56	MOVD	n+8(FP), RARG1
    57	// void __asan_register_globals_go(void *addr, uintptr_t n);
    58	MOVD	$__asan_register_globals_go(SB), FARG
    59	BR	asancall<>(SB)
    60
    61// Switches SP to g0 stack and calls (FARG). Arguments already set.
    62TEXT	asancall<>(SB), NOSPLIT, $0-0
    63	// LR saved in generated prologue
    64	// Get info from the current goroutine
    65	MOVD	runtime·tls_g(SB), R10  // g offset in TLS
    66	MOVD	0(R10), g
    67	MOVD	g_m(g), R7		// m for g
    68	MOVD	R1, R16			// callee-saved, preserved across C call
    69	MOVD	m_g0(R7), R10		// g0 for m
    70	CMP	R10, g			// same g0?
    71	BEQ	call			// already on g0
    72	MOVD	(g_sched+gobuf_sp)(R10), R1 // switch R1
    73call:
    74	// prepare frame for C ABI
    75	SUB	$32, R1			// create frame for callee saving LR, CR, R2 etc.
    76	RLDCR	$0, R1, $~15, R1	// align SP to 16 bytes
    77	MOVD	FARG, CTR		// address of function to be called
    78	MOVD	R0, 0(R1)		// clear back chain pointer
    79	BL	(CTR)
    80	MOVD	$0, R0			// C code can clobber R0 set it back to 0
    81	MOVD	R16, R1			// restore R1;
    82	MOVD	runtime·tls_g(SB), R10	// find correct g
    83	MOVD	0(R10), g
    84	RET
    85
    86// tls_g, g value for each thread in TLS
    87GLOBL runtime·tls_g+0(SB), TLSBSS+DUPOK, $8
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