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Commit b9657463 authored by Will Deacon's avatar Will Deacon
Browse files

rseq/selftests: Add support for arm64 



Hook up arm64 support to the rseq selftests.

Acked-by: default avatarMathieu Desnoyers <mathieu.desnoyers@efficios.com>
Signed-off-by: default avatarWill Deacon <will.deacon@arm.com>
parent 09ffcb0d

tools/testing/selftests/rseq/param_test.c

+20 −0
Original line number Diff line number Diff line
@@ -114,6 +114,26 @@ unsigned int yield_mod_cnt, nr_abort; 
	"bne 222b\n\t" \

	"333:\n\t"



#elif defined(__AARCH64EL__)



#define RSEQ_INJECT_INPUT \

	, [loop_cnt_1] "Qo" (loop_cnt[1]) \

	, [loop_cnt_2] "Qo" (loop_cnt[2]) \

	, [loop_cnt_3] "Qo" (loop_cnt[3]) \

	, [loop_cnt_4] "Qo" (loop_cnt[4]) \

	, [loop_cnt_5] "Qo" (loop_cnt[5]) \

	, [loop_cnt_6] "Qo" (loop_cnt[6])



#define INJECT_ASM_REG	RSEQ_ASM_TMP_REG32



#define RSEQ_INJECT_ASM(n) \

	"	ldr	" INJECT_ASM_REG ", %[loop_cnt_" #n "]\n"	\

	"	cbz	" INJECT_ASM_REG ", 333f\n"			\

	"222:\n"							\

	"	sub	" INJECT_ASM_REG ", " INJECT_ASM_REG ", #1\n"	\

	"	cbnz	" INJECT_ASM_REG ", 222b\n"			\

	"333:\n"



#elif __PPC__



#define RSEQ_INJECT_INPUT \

tools/testing/selftests/rseq/rseq-arm64.h

0 → 100644
+594 −0
Original line number Diff line number Diff line 
/* SPDX-License-Identifier: LGPL-2.1 OR MIT */

/*

 * rseq-arm64.h

 *

 * (C) Copyright 2016-2018 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

 * (C) Copyright 2018 - Will Deacon <will.deacon@arm.com>

 */



#define RSEQ_SIG	0xd428bc00	/* BRK #0x45E0 */



#define rseq_smp_mb()	__asm__ __volatile__ ("dmb ish" ::: "memory")

#define rseq_smp_rmb()	__asm__ __volatile__ ("dmb ishld" ::: "memory")

#define rseq_smp_wmb()	__asm__ __volatile__ ("dmb ishst" ::: "memory")



#define rseq_smp_load_acquire(p)						\

__extension__ ({								\

	__typeof(*p) ____p1;							\

	switch (sizeof(*p)) {							\

	case 1:									\

		asm volatile ("ldarb %w0, %1"					\

			: "=r" (*(__u8 *)p)					\

			: "Q" (*p) : "memory");					\

		break;								\

	case 2:									\

		asm volatile ("ldarh %w0, %1"					\

			: "=r" (*(__u16 *)p)					\

			: "Q" (*p) : "memory");					\

		break;								\

	case 4:									\

		asm volatile ("ldar %w0, %1"					\

			: "=r" (*(__u32 *)p)					\

			: "Q" (*p) : "memory");					\

		break;								\

	case 8:									\

		asm volatile ("ldar %0, %1"					\

			: "=r" (*(__u64 *)p)					\

			: "Q" (*p) : "memory");					\

		break;								\

	}									\

	____p1;									\

})



#define rseq_smp_acquire__after_ctrl_dep()	rseq_smp_rmb()



#define rseq_smp_store_release(p, v)						\

do {										\

	switch (sizeof(*p)) {							\

	case 1:									\

		asm volatile ("stlrb %w1, %0"					\

				: "=Q" (*p)					\

				: "r" ((__u8)v)					\

				: "memory");					\

		break;								\

	case 2:									\

		asm volatile ("stlrh %w1, %0"					\

				: "=Q" (*p)					\

				: "r" ((__u16)v)				\

				: "memory");					\

		break;								\

	case 4:									\

		asm volatile ("stlr %w1, %0"					\

				: "=Q" (*p)					\

				: "r" ((__u32)v)				\

				: "memory");					\

		break;								\

	case 8:									\

		asm volatile ("stlr %1, %0"					\

				: "=Q" (*p)					\

				: "r" ((__u64)v)				\

				: "memory");					\

		break;								\

	}									\

} while (0)



#ifdef RSEQ_SKIP_FASTPATH

#include "rseq-skip.h"

#else /* !RSEQ_SKIP_FASTPATH */



#define RSEQ_ASM_TMP_REG32	"w15"

#define RSEQ_ASM_TMP_REG	"x15"

#define RSEQ_ASM_TMP_REG_2	"x14"



#define __RSEQ_ASM_DEFINE_TABLE(label, version, flags, start_ip,		\

				post_commit_offset, abort_ip)			\

	"	.pushsection	__rseq_table, \"aw\"\n"				\

	"	.balign	32\n"							\

	__rseq_str(label) ":\n"							\

	"	.long	" __rseq_str(version) ", " __rseq_str(flags) "\n"	\

	"	.quad	" __rseq_str(start_ip) ", "				\

			  __rseq_str(post_commit_offset) ", "			\

			  __rseq_str(abort_ip) "\n"				\

	"	.popsection\n"



#define RSEQ_ASM_DEFINE_TABLE(label, start_ip, post_commit_ip, abort_ip)	\

	__RSEQ_ASM_DEFINE_TABLE(label, 0x0, 0x0, start_ip,			\

				(post_commit_ip - start_ip), abort_ip)



#define RSEQ_ASM_STORE_RSEQ_CS(label, cs_label, rseq_cs)			\

	RSEQ_INJECT_ASM(1)							\

	"	adrp	" RSEQ_ASM_TMP_REG ", " __rseq_str(cs_label) "\n"	\

	"	add	" RSEQ_ASM_TMP_REG ", " RSEQ_ASM_TMP_REG		\

			", :lo12:" __rseq_str(cs_label) "\n"			\

	"	str	" RSEQ_ASM_TMP_REG ", %[" __rseq_str(rseq_cs) "]\n"	\

	__rseq_str(label) ":\n"



#define RSEQ_ASM_DEFINE_ABORT(label, abort_label)				\

	"	b	222f\n"							\

	"	.inst 	"	__rseq_str(RSEQ_SIG) "\n"			\

	__rseq_str(label) ":\n"							\

	"	b	%l[" __rseq_str(abort_label) "]\n"			\

	"222:\n"



#define RSEQ_ASM_OP_STORE(value, var)						\

	"	str	%[" __rseq_str(value) "], %[" __rseq_str(var) "]\n"



#define RSEQ_ASM_OP_STORE_RELEASE(value, var)					\

	"	stlr	%[" __rseq_str(value) "], %[" __rseq_str(var) "]\n"



#define RSEQ_ASM_OP_FINAL_STORE(value, var, post_commit_label)			\

	RSEQ_ASM_OP_STORE(value, var)						\

	__rseq_str(post_commit_label) ":\n"



#define RSEQ_ASM_OP_FINAL_STORE_RELEASE(value, var, post_commit_label)		\

	RSEQ_ASM_OP_STORE_RELEASE(value, var)					\

	__rseq_str(post_commit_label) ":\n"



#define RSEQ_ASM_OP_CMPEQ(var, expect, label)					\

	"	ldr	" RSEQ_ASM_TMP_REG ", %[" __rseq_str(var) "]\n"		\

	"	sub	" RSEQ_ASM_TMP_REG ", " RSEQ_ASM_TMP_REG		\

			", %[" __rseq_str(expect) "]\n"				\

	"	cbnz	" RSEQ_ASM_TMP_REG ", " __rseq_str(label) "\n"



#define RSEQ_ASM_OP_CMPEQ32(var, expect, label)					\

	"	ldr	" RSEQ_ASM_TMP_REG32 ", %[" __rseq_str(var) "]\n"	\

	"	sub	" RSEQ_ASM_TMP_REG32 ", " RSEQ_ASM_TMP_REG32		\

			", %w[" __rseq_str(expect) "]\n"			\

	"	cbnz	" RSEQ_ASM_TMP_REG32 ", " __rseq_str(label) "\n"



#define RSEQ_ASM_OP_CMPNE(var, expect, label)					\

	"	ldr	" RSEQ_ASM_TMP_REG ", %[" __rseq_str(var) "]\n"		\

	"	sub	" RSEQ_ASM_TMP_REG ", " RSEQ_ASM_TMP_REG		\

			", %[" __rseq_str(expect) "]\n"				\

	"	cbz	" RSEQ_ASM_TMP_REG ", " __rseq_str(label) "\n"



#define RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, label)			\

	RSEQ_INJECT_ASM(2)							\

	RSEQ_ASM_OP_CMPEQ32(current_cpu_id, cpu_id, label)



#define RSEQ_ASM_OP_R_LOAD(var)							\

	"	ldr	" RSEQ_ASM_TMP_REG ", %[" __rseq_str(var) "]\n"



#define RSEQ_ASM_OP_R_STORE(var)						\

	"	str	" RSEQ_ASM_TMP_REG ", %[" __rseq_str(var) "]\n"



#define RSEQ_ASM_OP_R_LOAD_OFF(offset)						\

	"	ldr	" RSEQ_ASM_TMP_REG ", [" RSEQ_ASM_TMP_REG		\

			", %[" __rseq_str(offset) "]]\n"



#define RSEQ_ASM_OP_R_ADD(count)						\

	"	add	" RSEQ_ASM_TMP_REG ", " RSEQ_ASM_TMP_REG		\

			", %[" __rseq_str(count) "]\n"



#define RSEQ_ASM_OP_R_FINAL_STORE(var, post_commit_label)			\

	"	str	" RSEQ_ASM_TMP_REG ", %[" __rseq_str(var) "]\n"		\

	__rseq_str(post_commit_label) ":\n"



#define RSEQ_ASM_OP_R_BAD_MEMCPY(dst, src, len)					\

	"	cbz	%[" __rseq_str(len) "], 333f\n"				\

	"	mov	" RSEQ_ASM_TMP_REG_2 ", %[" __rseq_str(len) "]\n"	\

	"222:	sub	" RSEQ_ASM_TMP_REG_2 ", " RSEQ_ASM_TMP_REG_2 ", #1\n"	\

	"	ldrb	" RSEQ_ASM_TMP_REG32 ", [%[" __rseq_str(src) "]"	\

			", " RSEQ_ASM_TMP_REG_2 "]\n"				\

	"	strb	" RSEQ_ASM_TMP_REG32 ", [%[" __rseq_str(dst) "]"	\

			", " RSEQ_ASM_TMP_REG_2 "]\n"				\

	"	cbnz	" RSEQ_ASM_TMP_REG_2 ", 222b\n"				\

	"333:\n"



static inline __attribute__((always_inline))

int rseq_cmpeqv_storev(intptr_t *v, intptr_t expect, intptr_t newv, int cpu)

{

	RSEQ_INJECT_C(9)



	__asm__ __volatile__ goto (

		RSEQ_ASM_DEFINE_TABLE(1, 2f, 3f, 4f)

		RSEQ_ASM_STORE_RSEQ_CS(2, 1b, rseq_cs)

		RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, 4f)

		RSEQ_INJECT_ASM(3)

		RSEQ_ASM_OP_CMPEQ(v, expect, %l[cmpfail])

		RSEQ_INJECT_ASM(4)

#ifdef RSEQ_COMPARE_TWICE

		RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, %l[error1])

		RSEQ_ASM_OP_CMPEQ(v, expect, %l[error2])

#endif

		RSEQ_ASM_OP_FINAL_STORE(newv, v, 3)

		RSEQ_INJECT_ASM(5)

		RSEQ_ASM_DEFINE_ABORT(4, abort)

		: /* gcc asm goto does not allow outputs */

		: [cpu_id]		"r" (cpu),

		  [current_cpu_id]	"Qo" (__rseq_abi.cpu_id),

		  [rseq_cs]		"m" (__rseq_abi.rseq_cs),

		  [v]			"Qo" (*v),

		  [expect]		"r" (expect),

		  [newv]		"r" (newv)

		  RSEQ_INJECT_INPUT

		: "memory", RSEQ_ASM_TMP_REG

		: abort, cmpfail

#ifdef RSEQ_COMPARE_TWICE

		  , error1, error2

#endif

	);



	return 0;

abort:

	RSEQ_INJECT_FAILED

	return -1;

cmpfail:

	return 1;

#ifdef RSEQ_COMPARE_TWICE

error1:

	rseq_bug("cpu_id comparison failed");

error2:

	rseq_bug("expected value comparison failed");

#endif

}



static inline __attribute__((always_inline))

int rseq_cmpnev_storeoffp_load(intptr_t *v, intptr_t expectnot,

			       off_t voffp, intptr_t *load, int cpu)

{

	RSEQ_INJECT_C(9)



	__asm__ __volatile__ goto (

		RSEQ_ASM_DEFINE_TABLE(1, 2f, 3f, 4f)

		RSEQ_ASM_STORE_RSEQ_CS(2, 1b, rseq_cs)

		RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, 4f)

		RSEQ_INJECT_ASM(3)

		RSEQ_ASM_OP_CMPNE(v, expectnot, %l[cmpfail])

		RSEQ_INJECT_ASM(4)

#ifdef RSEQ_COMPARE_TWICE

		RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, %l[error1])

		RSEQ_ASM_OP_CMPNE(v, expectnot, %l[error2])

#endif

		RSEQ_ASM_OP_R_LOAD(v)

		RSEQ_ASM_OP_R_STORE(load)

		RSEQ_ASM_OP_R_LOAD_OFF(voffp)

		RSEQ_ASM_OP_R_FINAL_STORE(v, 3)

		RSEQ_INJECT_ASM(5)

		RSEQ_ASM_DEFINE_ABORT(4, abort)

		: /* gcc asm goto does not allow outputs */

		: [cpu_id]		"r" (cpu),

		  [current_cpu_id]	"Qo" (__rseq_abi.cpu_id),

		  [rseq_cs]		"m" (__rseq_abi.rseq_cs),

		  [v]			"Qo" (*v),

		  [expectnot]		"r" (expectnot),

		  [load]		"Qo" (*load),

		  [voffp]		"r" (voffp)

		  RSEQ_INJECT_INPUT

		: "memory", RSEQ_ASM_TMP_REG

		: abort, cmpfail

#ifdef RSEQ_COMPARE_TWICE

		  , error1, error2

#endif

	);

	return 0;

abort:

	RSEQ_INJECT_FAILED

	return -1;

cmpfail:

	return 1;

#ifdef RSEQ_COMPARE_TWICE

error1:

	rseq_bug("cpu_id comparison failed");

error2:

	rseq_bug("expected value comparison failed");

#endif

}



static inline __attribute__((always_inline))

int rseq_addv(intptr_t *v, intptr_t count, int cpu)

{

	RSEQ_INJECT_C(9)



	__asm__ __volatile__ goto (

		RSEQ_ASM_DEFINE_TABLE(1, 2f, 3f, 4f)

		RSEQ_ASM_STORE_RSEQ_CS(2, 1b, rseq_cs)

		RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, 4f)

		RSEQ_INJECT_ASM(3)

#ifdef RSEQ_COMPARE_TWICE

		RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, %l[error1])

#endif

		RSEQ_ASM_OP_R_LOAD(v)

		RSEQ_ASM_OP_R_ADD(count)

		RSEQ_ASM_OP_R_FINAL_STORE(v, 3)

		RSEQ_INJECT_ASM(4)

		RSEQ_ASM_DEFINE_ABORT(4, abort)

		: /* gcc asm goto does not allow outputs */

		: [cpu_id]		"r" (cpu),

		  [current_cpu_id]	"Qo" (__rseq_abi.cpu_id),

		  [rseq_cs]		"m" (__rseq_abi.rseq_cs),

		  [v]			"Qo" (*v),

		  [count]		"r" (count)

		  RSEQ_INJECT_INPUT

		: "memory", RSEQ_ASM_TMP_REG

		: abort

#ifdef RSEQ_COMPARE_TWICE

		  , error1

#endif

	);

	return 0;

abort:

	RSEQ_INJECT_FAILED

	return -1;

#ifdef RSEQ_COMPARE_TWICE

error1:

	rseq_bug("cpu_id comparison failed");

#endif

}



static inline __attribute__((always_inline))

int rseq_cmpeqv_trystorev_storev(intptr_t *v, intptr_t expect,

				 intptr_t *v2, intptr_t newv2,

				 intptr_t newv, int cpu)

{

	RSEQ_INJECT_C(9)



	__asm__ __volatile__ goto (

		RSEQ_ASM_DEFINE_TABLE(1, 2f, 3f, 4f)

		RSEQ_ASM_STORE_RSEQ_CS(2, 1b, rseq_cs)

		RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, 4f)

		RSEQ_INJECT_ASM(3)

		RSEQ_ASM_OP_CMPEQ(v, expect, %l[cmpfail])

		RSEQ_INJECT_ASM(4)

#ifdef RSEQ_COMPARE_TWICE

		RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, %l[error1])

		RSEQ_ASM_OP_CMPEQ(v, expect, %l[error2])

#endif

		RSEQ_ASM_OP_STORE(newv2, v2)

		RSEQ_INJECT_ASM(5)

		RSEQ_ASM_OP_FINAL_STORE(newv, v, 3)

		RSEQ_INJECT_ASM(6)

		RSEQ_ASM_DEFINE_ABORT(4, abort)

		: /* gcc asm goto does not allow outputs */

		: [cpu_id]		"r" (cpu),

		  [current_cpu_id]	"Qo" (__rseq_abi.cpu_id),

		  [rseq_cs]		"m" (__rseq_abi.rseq_cs),

		  [expect]		"r" (expect),

		  [v]			"Qo" (*v),

		  [newv]		"r" (newv),

		  [v2]			"Qo" (*v2),

		  [newv2]		"r" (newv2)

		  RSEQ_INJECT_INPUT

		: "memory", RSEQ_ASM_TMP_REG

		: abort, cmpfail

#ifdef RSEQ_COMPARE_TWICE

		  , error1, error2

#endif

	);



	return 0;

abort:

	RSEQ_INJECT_FAILED

	return -1;

cmpfail:

	return 1;

#ifdef RSEQ_COMPARE_TWICE

error1:

	rseq_bug("cpu_id comparison failed");

error2:

	rseq_bug("expected value comparison failed");

#endif

}



static inline __attribute__((always_inline))

int rseq_cmpeqv_trystorev_storev_release(intptr_t *v, intptr_t expect,

					 intptr_t *v2, intptr_t newv2,

					 intptr_t newv, int cpu)

{

	RSEQ_INJECT_C(9)



	__asm__ __volatile__ goto (

		RSEQ_ASM_DEFINE_TABLE(1, 2f, 3f, 4f)

		RSEQ_ASM_STORE_RSEQ_CS(2, 1b, rseq_cs)

		RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, 4f)

		RSEQ_INJECT_ASM(3)

		RSEQ_ASM_OP_CMPEQ(v, expect, %l[cmpfail])

		RSEQ_INJECT_ASM(4)

#ifdef RSEQ_COMPARE_TWICE

		RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, %l[error1])

		RSEQ_ASM_OP_CMPEQ(v, expect, %l[error2])

#endif

		RSEQ_ASM_OP_STORE(newv2, v2)

		RSEQ_INJECT_ASM(5)

		RSEQ_ASM_OP_FINAL_STORE_RELEASE(newv, v, 3)

		RSEQ_INJECT_ASM(6)

		RSEQ_ASM_DEFINE_ABORT(4, abort)

		: /* gcc asm goto does not allow outputs */

		: [cpu_id]		"r" (cpu),

		  [current_cpu_id]	"Qo" (__rseq_abi.cpu_id),

		  [rseq_cs]		"m" (__rseq_abi.rseq_cs),

		  [expect]		"r" (expect),

		  [v]			"Qo" (*v),

		  [newv]		"r" (newv),

		  [v2]			"Qo" (*v2),

		  [newv2]		"r" (newv2)

		  RSEQ_INJECT_INPUT

		: "memory", RSEQ_ASM_TMP_REG

		: abort, cmpfail

#ifdef RSEQ_COMPARE_TWICE

		  , error1, error2

#endif

	);



	return 0;

abort:

	RSEQ_INJECT_FAILED

	return -1;

cmpfail:

	return 1;

#ifdef RSEQ_COMPARE_TWICE

error1:

	rseq_bug("cpu_id comparison failed");

error2:

	rseq_bug("expected value comparison failed");

#endif

}



static inline __attribute__((always_inline))

int rseq_cmpeqv_cmpeqv_storev(intptr_t *v, intptr_t expect,

			      intptr_t *v2, intptr_t expect2,

			      intptr_t newv, int cpu)

{

	RSEQ_INJECT_C(9)



	__asm__ __volatile__ goto (

		RSEQ_ASM_DEFINE_TABLE(1, 2f, 3f, 4f)

		RSEQ_ASM_STORE_RSEQ_CS(2, 1b, rseq_cs)

		RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, 4f)

		RSEQ_INJECT_ASM(3)

		RSEQ_ASM_OP_CMPEQ(v, expect, %l[cmpfail])

		RSEQ_INJECT_ASM(4)

		RSEQ_ASM_OP_CMPEQ(v2, expect2, %l[cmpfail])

		RSEQ_INJECT_ASM(5)

#ifdef RSEQ_COMPARE_TWICE

		RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, %l[error1])

		RSEQ_ASM_OP_CMPEQ(v, expect, %l[error2])

		RSEQ_ASM_OP_CMPEQ(v2, expect2, %l[error3])

#endif

		RSEQ_ASM_OP_FINAL_STORE(newv, v, 3)

		RSEQ_INJECT_ASM(6)

		RSEQ_ASM_DEFINE_ABORT(4, abort)

		: /* gcc asm goto does not allow outputs */

		: [cpu_id]		"r" (cpu),

		  [current_cpu_id]	"Qo" (__rseq_abi.cpu_id),

		  [rseq_cs]		"m" (__rseq_abi.rseq_cs),

		  [v]			"Qo" (*v),

		  [expect]		"r" (expect),

		  [v2]			"Qo" (*v2),

		  [expect2]		"r" (expect2),

		  [newv]		"r" (newv)

		  RSEQ_INJECT_INPUT

		: "memory", RSEQ_ASM_TMP_REG

		: abort, cmpfail

#ifdef RSEQ_COMPARE_TWICE

		  , error1, error2, error3

#endif

	);



	return 0;

abort:

	RSEQ_INJECT_FAILED

	return -1;

cmpfail:

	return 1;

#ifdef RSEQ_COMPARE_TWICE

error1:

	rseq_bug("cpu_id comparison failed");

error2:

	rseq_bug("expected value comparison failed");

error3:

	rseq_bug("2nd expected value comparison failed");

#endif

}



static inline __attribute__((always_inline))

int rseq_cmpeqv_trymemcpy_storev(intptr_t *v, intptr_t expect,

				 void *dst, void *src, size_t len,

				 intptr_t newv, int cpu)

{

	RSEQ_INJECT_C(9)



	__asm__ __volatile__ goto (

		RSEQ_ASM_DEFINE_TABLE(1, 2f, 3f, 4f)

		RSEQ_ASM_STORE_RSEQ_CS(2, 1b, rseq_cs)

		RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, 4f)

		RSEQ_INJECT_ASM(3)

		RSEQ_ASM_OP_CMPEQ(v, expect, %l[cmpfail])

		RSEQ_INJECT_ASM(4)

#ifdef RSEQ_COMPARE_TWICE

		RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, %l[error1])

		RSEQ_ASM_OP_CMPEQ(v, expect, %l[error2])

#endif

		RSEQ_ASM_OP_R_BAD_MEMCPY(dst, src, len)

		RSEQ_INJECT_ASM(5)

		RSEQ_ASM_OP_FINAL_STORE(newv, v, 3)

		RSEQ_INJECT_ASM(6)

		RSEQ_ASM_DEFINE_ABORT(4, abort)

		: /* gcc asm goto does not allow outputs */

		: [cpu_id]		"r" (cpu),

		  [current_cpu_id]	"Qo" (__rseq_abi.cpu_id),

		  [rseq_cs]		"m" (__rseq_abi.rseq_cs),

		  [expect]		"r" (expect),

		  [v]			"Qo" (*v),

		  [newv]		"r" (newv),

		  [dst]			"r" (dst),

		  [src]			"r" (src),

		  [len]			"r" (len)

		  RSEQ_INJECT_INPUT

		: "memory", RSEQ_ASM_TMP_REG, RSEQ_ASM_TMP_REG_2

		: abort, cmpfail

#ifdef RSEQ_COMPARE_TWICE

		  , error1, error2

#endif

	);



	return 0;

abort:

	RSEQ_INJECT_FAILED

	return -1;

cmpfail:

	return 1;

#ifdef RSEQ_COMPARE_TWICE

error1:

	rseq_bug("cpu_id comparison failed");

error2:

	rseq_bug("expected value comparison failed");

#endif

}



static inline __attribute__((always_inline))

int rseq_cmpeqv_trymemcpy_storev_release(intptr_t *v, intptr_t expect,

					 void *dst, void *src, size_t len,

					 intptr_t newv, int cpu)

{

	RSEQ_INJECT_C(9)



	__asm__ __volatile__ goto (

		RSEQ_ASM_DEFINE_TABLE(1, 2f, 3f, 4f)

		RSEQ_ASM_STORE_RSEQ_CS(2, 1b, rseq_cs)

		RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, 4f)

		RSEQ_INJECT_ASM(3)

		RSEQ_ASM_OP_CMPEQ(v, expect, %l[cmpfail])

		RSEQ_INJECT_ASM(4)

#ifdef RSEQ_COMPARE_TWICE

		RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, %l[error1])

		RSEQ_ASM_OP_CMPEQ(v, expect, %l[error2])

#endif

		RSEQ_ASM_OP_R_BAD_MEMCPY(dst, src, len)

		RSEQ_INJECT_ASM(5)

		RSEQ_ASM_OP_FINAL_STORE_RELEASE(newv, v, 3)

		RSEQ_INJECT_ASM(6)

		RSEQ_ASM_DEFINE_ABORT(4, abort)

		: /* gcc asm goto does not allow outputs */

		: [cpu_id]		"r" (cpu),

		  [current_cpu_id]	"Qo" (__rseq_abi.cpu_id),

		  [rseq_cs]		"m" (__rseq_abi.rseq_cs),

		  [expect]		"r" (expect),

		  [v]			"Qo" (*v),

		  [newv]		"r" (newv),

		  [dst]			"r" (dst),

		  [src]			"r" (src),

		  [len]			"r" (len)

		  RSEQ_INJECT_INPUT

		: "memory", RSEQ_ASM_TMP_REG, RSEQ_ASM_TMP_REG_2

		: abort, cmpfail

#ifdef RSEQ_COMPARE_TWICE

		  , error1, error2

#endif

	);



	return 0;

abort:

	RSEQ_INJECT_FAILED

	return -1;

cmpfail:

	return 1;

#ifdef RSEQ_COMPARE_TWICE

error1:

	rseq_bug("cpu_id comparison failed");

error2:

	rseq_bug("expected value comparison failed");

#endif

}



#endif /* !RSEQ_SKIP_FASTPATH */

tools/testing/selftests/rseq/rseq.h

+2 −0
Original line number Diff line number Diff line
@@ -71,6 +71,8 @@ extern __thread volatile struct rseq __rseq_abi; 
#include <rseq-x86.h>

#elif defined(__ARMEL__)

#include <rseq-arm.h>

#elif defined (__AARCH64EL__)

#include <rseq-arm64.h>

#elif defined(__PPC__)

#include <rseq-ppc.h>

#elif defined(__mips__)