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// func runtime·lsanregisterrootregion(addr unsafe.Pointer, n uintptr)
    62TEXT	runtime·lsanregisterrootregion(SB),NOSPLIT|NOFRAME,$0-16
    63	MOVD	addr+0(FP), RARG0
    64	MOVD	n+8(FP), RARG1
    65	// void __lsan_register_root_region_go(void *addr, uintptr_t n);
    66	MOVD	$__lsan_register_root_region_go(SB), FARG
    67	BR	asancall<>(SB)
    68
    69// func runtime·lsanunregisterrootregion(addr unsafe.Pointer, n uintptr)
    70TEXT	runtime·lsanunregisterrootregion(SB),NOSPLIT|NOFRAME,$0-16
    71	MOVD	addr+0(FP), RARG0
    72	MOVD	n+8(FP), RARG1
    73	// void __lsan_unregister_root_region_go(void *addr, uintptr_t n);
    74	MOVD	$__lsan_unregister_root_region_go(SB), FARG
    75	BR	asancall<>(SB)
    76
    77// func runtime·lsandoleakcheck()
    78TEXT	runtime·lsandoleakcheck(SB), NOSPLIT|NOFRAME, $0-0
    79	// void __lsan_do_leak_check_go(void);
    80	MOVD	$__lsan_do_leak_check_go(SB), FARG
    81	BR	asancall<>(SB)
    82
    83// Switches SP to g0 stack and calls (FARG). Arguments already set.
    84TEXT	asancall<>(SB), NOSPLIT, $0-0
    85	// LR saved in generated prologue
    86	// Get info from the current goroutine
    87	MOVD	runtime·tls_g(SB), R10  // g offset in TLS
    88	MOVD	0(R10), g
    89	MOVD	g_m(g), R7		// m for g
    90	MOVD	R1, R16			// callee-saved, preserved across C call
    91
    92	// Switch to g0 stack if we aren't already on g0 or gsignal.
    93	MOVD	m_gsignal(R7), R10
    94	CMP	R10, g
    95	BEQ	call
    96
    97	MOVD	m_g0(R7), R10
    98	CMP	R10, g
    99	BEQ	call
   100
   101	MOVD	(g_sched+gobuf_sp)(R10), R1 // switch R1
   102
   103call:
   104	// prepare frame for C ABI
   105	SUB	$32, R1			// create frame for callee saving LR, CR, R2 etc.
   106	RLDCR	$0, R1, $~15, R1	// align SP to 16 bytes
   107	MOVD	FARG, CTR		// address of function to be called
   108	MOVD	R0, 0(R1)		// clear back chain pointer
   109	BL	(CTR)
   110	MOVD	$0, R0			// C code can clobber R0 set it back to 0
   111	MOVD	R16, R1			// restore R1;
   112	MOVD	runtime·tls_g(SB), R10	// find correct g
   113	MOVD	0(R10), g
   114	RET
   115
   116// tls_g, g value for each thread in TLS
   117GLOBL runtime·tls_g+0(SB), TLSBSS+DUPOK, $8
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