tools/testing/selftests/rseq/rseq-ppc-bits.h

/* SPDX-License-Identifier: LGPL-2.1 OR MIT */
/*
 * rseq-ppc-bits.h
 *
 * (C) Copyright 2016-2018 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
 * (C) Copyright 2016-2018 - Boqun Feng <boqun.feng@gmail.com>
 */

#include "rseq-bits-template.h"

#if defined(RSEQ_TEMPLATE_MO_RELAXED) && \
	(defined(RSEQ_TEMPLATE_CPU_ID) || defined(RSEQ_TEMPLATE_MM_CID))

static inline __attribute__((always_inline))
int RSEQ_TEMPLATE_IDENTIFIER(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(3, 1f, 2f, 4f) /* start, commit, abort */
		RSEQ_ASM_DEFINE_EXIT_POINT(1f, %l[cmpfail])
#ifdef RSEQ_COMPARE_TWICE
		RSEQ_ASM_DEFINE_EXIT_POINT(1f, %l[error1])
		RSEQ_ASM_DEFINE_EXIT_POINT(1f, %l[error2])
#endif
		/* Start rseq by storing table entry pointer into rseq_cs. */
		RSEQ_ASM_STORE_RSEQ_CS(1, 3b, rseq_cs)
		/* cmp cpuid */
		RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, 4f)
		RSEQ_INJECT_ASM(3)
		/* cmp @v equal to @expect */
		RSEQ_ASM_OP_CMPEQ(v, expect, %l[cmpfail])
		RSEQ_INJECT_ASM(4)
#ifdef RSEQ_COMPARE_TWICE
		/* cmp cpuid */
		RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, %l[error1])
		/* cmp @v equal to @expect */
		RSEQ_ASM_OP_CMPEQ(v, expect, %l[error2])
#endif
		/* final store */
		RSEQ_ASM_OP_FINAL_STORE(newv, v, 2)
		RSEQ_INJECT_ASM(5)
		RSEQ_ASM_DEFINE_ABORT(4, abort)
		: /* gcc asm goto does not allow outputs */
		: [cpu_id]		"r" (cpu),
		  [current_cpu_id]	"m" (rseq_get_abi()->RSEQ_TEMPLATE_CPU_ID_FIELD),
		  [rseq_cs]		"m" (rseq_get_abi()->rseq_cs.arch.ptr),
		  [v]			"m" (*v),
		  [expect]		"r" (expect),
		  [newv]		"r" (newv)
		  RSEQ_INJECT_INPUT
		: "memory", "cc", "r17"
		  RSEQ_INJECT_CLOBBER
		: abort, cmpfail
#ifdef RSEQ_COMPARE_TWICE
		  , error1, error2
#endif
	);
	rseq_after_asm_goto();
	return 0;
abort:
	rseq_after_asm_goto();
	RSEQ_INJECT_FAILED
	return -1;
cmpfail:
	rseq_after_asm_goto();
	return 1;
#ifdef RSEQ_COMPARE_TWICE
error1:
	rseq_after_asm_goto();
	rseq_bug("cpu_id comparison failed");
error2:
	rseq_after_asm_goto();
	rseq_bug("expected value comparison failed");
#endif
}

static inline __attribute__((always_inline))
int RSEQ_TEMPLATE_IDENTIFIER(rseq_cmpnev_storeoffp_load)(intptr_t *v, intptr_t expectnot,
			       long voffp, intptr_t *load, int cpu)
{
	RSEQ_INJECT_C(9)

	__asm__ __volatile__ goto (
		RSEQ_ASM_DEFINE_TABLE(3, 1f, 2f, 4f) /* start, commit, abort */
		RSEQ_ASM_DEFINE_EXIT_POINT(1f, %l[cmpfail])
#ifdef RSEQ_COMPARE_TWICE
		RSEQ_ASM_DEFINE_EXIT_POINT(1f, %l[error1])
		RSEQ_ASM_DEFINE_EXIT_POINT(1f, %l[error2])
#endif
		/* Start rseq by storing table entry pointer into rseq_cs. */
		RSEQ_ASM_STORE_RSEQ_CS(1, 3b, rseq_cs)
		/* cmp cpuid */
		RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, 4f)
		RSEQ_INJECT_ASM(3)
		/* cmp @v not equal to @expectnot */
		RSEQ_ASM_OP_CMPNE(v, expectnot, %l[cmpfail])
		RSEQ_INJECT_ASM(4)
#ifdef RSEQ_COMPARE_TWICE
		/* cmp cpuid */
		RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, %l[error1])
		/* cmp @v not equal to @expectnot */
		RSEQ_ASM_OP_CMPNE(v, expectnot, %l[error2])
#endif
		/* load the value of @v */
		RSEQ_ASM_OP_R_LOAD(v)
		/* store it in @load */
		RSEQ_ASM_OP_R_STORE(load)
		/* dereference voffp(v) */
		RSEQ_ASM_OP_R_LOADX(voffp)
		/* final store the value at voffp(v) */
		RSEQ_ASM_OP_R_FINAL_STORE(v, 2)
		RSEQ_INJECT_ASM(5)
		RSEQ_ASM_DEFINE_ABORT(4, abort)
		: /* gcc asm goto does not allow outputs */
		: [cpu_id]		"r" (cpu),
		  [current_cpu_id]	"m" (rseq_get_abi()->RSEQ_TEMPLATE_CPU_ID_FIELD),
		  [rseq_cs]		"m" (rseq_get_abi()->rseq_cs.arch.ptr),
		  /* final store input */
		  [v]			"m" (*v),
		  [expectnot]		"r" (expectnot),
		  [voffp]		"b" (voffp),
		  [load]		"m" (*load)
		  RSEQ_INJECT_INPUT
		: "memory", "cc", "r17"
		  RSEQ_INJECT_CLOBBER
		: abort, cmpfail
#ifdef RSEQ_COMPARE_TWICE
		  , error1, error2
#endif
	);
	rseq_after_asm_goto();
	return 0;
abort:
	rseq_after_asm_goto();
	RSEQ_INJECT_FAILED
	return -1;
cmpfail:
	rseq_after_asm_goto();
	return 1;
#ifdef RSEQ_COMPARE_TWICE
error1:
	rseq_after_asm_goto();
	rseq_bug("cpu_id comparison failed");
error2:
	rseq_after_asm_goto();
	rseq_bug("expected value comparison failed");
#endif
}

static inline __attribute__((always_inline))
int RSEQ_TEMPLATE_IDENTIFIER(rseq_addv)(intptr_t *v, intptr_t count, int cpu)
{
	RSEQ_INJECT_C(9)

	__asm__ __volatile__ goto (
		RSEQ_ASM_DEFINE_TABLE(3, 1f, 2f, 4f) /* start, commit, abort */
#ifdef RSEQ_COMPARE_TWICE
		RSEQ_ASM_DEFINE_EXIT_POINT(1f, %l[error1])
#endif
		/* Start rseq by storing table entry pointer into rseq_cs. */
		RSEQ_ASM_STORE_RSEQ_CS(1, 3b, rseq_cs)
		/* cmp cpuid */
		RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, 4f)
		RSEQ_INJECT_ASM(3)
#ifdef RSEQ_COMPARE_TWICE
		/* cmp cpuid */
		RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, %l[error1])
#endif
		/* load the value of @v */
		RSEQ_ASM_OP_R_LOAD(v)
		/* add @count to it */
		RSEQ_ASM_OP_R_ADD(count)
		/* final store */
		RSEQ_ASM_OP_R_FINAL_STORE(v, 2)
		RSEQ_INJECT_ASM(4)
		RSEQ_ASM_DEFINE_ABORT(4, abort)
		: /* gcc asm goto does not allow outputs */
		: [cpu_id]		"r" (cpu),
		  [current_cpu_id]	"m" (rseq_get_abi()->RSEQ_TEMPLATE_CPU_ID_FIELD),
		  [rseq_cs]		"m" (rseq_get_abi()->rseq_cs.arch.ptr),
		  /* final store input */
		  [v]			"m" (*v),
		  [count]		"r" (count)
		  RSEQ_INJECT_INPUT
		: "memory", "cc", "r17"
		  RSEQ_INJECT_CLOBBER
		: abort
#ifdef RSEQ_COMPARE_TWICE
		  , error1
#endif
	);
	rseq_after_asm_goto();
	return 0;
abort:
	rseq_after_asm_goto();
	RSEQ_INJECT_FAILED
	return -1;
#ifdef RSEQ_COMPARE_TWICE
error1:
	rseq_after_asm_goto();
	rseq_bug("cpu_id comparison failed");
#endif
}

static inline __attribute__((always_inline))
int RSEQ_TEMPLATE_IDENTIFIER(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(3, 1f, 2f, 4f) /* start, commit, abort */
		RSEQ_ASM_DEFINE_EXIT_POINT(1f, %l[cmpfail])
#ifdef RSEQ_COMPARE_TWICE
		RSEQ_ASM_DEFINE_EXIT_POINT(1f, %l[error1])
		RSEQ_ASM_DEFINE_EXIT_POINT(1f, %l[error2])
		RSEQ_ASM_DEFINE_EXIT_POINT(1f, %l[error3])
#endif
		/* Start rseq by storing table entry pointer into rseq_cs. */
		RSEQ_ASM_STORE_RSEQ_CS(1, 3b, rseq_cs)
		/* cmp cpuid */
		RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, 4f)
		RSEQ_INJECT_ASM(3)
		/* cmp @v equal to @expect */
		RSEQ_ASM_OP_CMPEQ(v, expect, %l[cmpfail])
		RSEQ_INJECT_ASM(4)
		/* cmp @v2 equal to @expct2 */
		RSEQ_ASM_OP_CMPEQ(v2, expect2, %l[cmpfail])
		RSEQ_INJECT_ASM(5)
#ifdef RSEQ_COMPARE_TWICE
		/* cmp cpuid */
		RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, %l[error1])
		/* cmp @v equal to @expect */
		RSEQ_ASM_OP_CMPEQ(v, expect, %l[error2])
		/* cmp @v2 equal to @expct2 */
		RSEQ_ASM_OP_CMPEQ(v2, expect2, %l[error3])
#endif
		/* final store */
		RSEQ_ASM_OP_FINAL_STORE(newv, v, 2)
		RSEQ_INJECT_ASM(6)
		RSEQ_ASM_DEFINE_ABORT(4, abort)
		: /* gcc asm goto does not allow outputs */
		: [cpu_id]		"r" (cpu),
		  [current_cpu_id]	"m" (rseq_get_abi()->RSEQ_TEMPLATE_CPU_ID_FIELD),
		  [rseq_cs]		"m" (rseq_get_abi()->rseq_cs.arch.ptr),
		  /* cmp2 input */
		  [v2]			"m" (*v2),
		  [expect2]		"r" (expect2),
		  /* final store input */
		  [v]			"m" (*v),
		  [expect]		"r" (expect),
		  [newv]		"r" (newv)
		  RSEQ_INJECT_INPUT
		: "memory", "cc", "r17"
		  RSEQ_INJECT_CLOBBER
		: abort, cmpfail
#ifdef RSEQ_COMPARE_TWICE
		  , error1, error2, error3
#endif
	);
	rseq_after_asm_goto();
	return 0;
abort:
	rseq_after_asm_goto();
	RSEQ_INJECT_FAILED
	return -1;
cmpfail:
	rseq_after_asm_goto();
	return 1;
#ifdef RSEQ_COMPARE_TWICE
error1:
	rseq_after_asm_goto();
	rseq_bug("cpu_id comparison failed");
error2:
	rseq_after_asm_goto();
	rseq_bug("1st expected value comparison failed");
error3:
	rseq_after_asm_goto();
	rseq_bug("2nd expected value comparison failed");
#endif
}

#endif /* #if defined(RSEQ_TEMPLATE_MO_RELAXED) &&
	(defined(RSEQ_TEMPLATE_CPU_ID) || defined(RSEQ_TEMPLATE_MM_CID)) */

#if (defined(RSEQ_TEMPLATE_MO_RELAXED) || defined(RSEQ_TEMPLATE_MO_RELEASE)) && \
	(defined(RSEQ_TEMPLATE_CPU_ID) || defined(RSEQ_TEMPLATE_MM_CID))

static inline __attribute__((always_inline))
int RSEQ_TEMPLATE_IDENTIFIER(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(3, 1f, 2f, 4f) /* start, commit, abort */
		RSEQ_ASM_DEFINE_EXIT_POINT(1f, %l[cmpfail])
#ifdef RSEQ_COMPARE_TWICE
		RSEQ_ASM_DEFINE_EXIT_POINT(1f, %l[error1])
		RSEQ_ASM_DEFINE_EXIT_POINT(1f, %l[error2])
#endif
		/* Start rseq by storing table entry pointer into rseq_cs. */
		RSEQ_ASM_STORE_RSEQ_CS(1, 3b, rseq_cs)
		/* cmp cpuid */
		RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, 4f)
		RSEQ_INJECT_ASM(3)
		/* cmp @v equal to @expect */
		RSEQ_ASM_OP_CMPEQ(v, expect, %l[cmpfail])
		RSEQ_INJECT_ASM(4)
#ifdef RSEQ_COMPARE_TWICE
		/* cmp cpuid */
		RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, %l[error1])
		/* cmp @v equal to @expect */
		RSEQ_ASM_OP_CMPEQ(v, expect, %l[error2])
#endif
		/* try store */
		RSEQ_ASM_OP_STORE(newv2, v2)
		RSEQ_INJECT_ASM(5)
#ifdef RSEQ_TEMPLATE_MO_RELEASE
		/* for 'release' */
		"lwsync\n\t"
#endif
		/* final store */
		RSEQ_ASM_OP_FINAL_STORE(newv, v, 2)
		RSEQ_INJECT_ASM(6)
		RSEQ_ASM_DEFINE_ABORT(4, abort)
		: /* gcc asm goto does not allow outputs */
		: [cpu_id]		"r" (cpu),
		  [current_cpu_id]	"m" (rseq_get_abi()->RSEQ_TEMPLATE_CPU_ID_FIELD),
		  [rseq_cs]		"m" (rseq_get_abi()->rseq_cs.arch.ptr),
		  /* try store input */
		  [v2]			"m" (*v2),
		  [newv2]		"r" (newv2),
		  /* final store input */
		  [v]			"m" (*v),
		  [expect]		"r" (expect),
		  [newv]		"r" (newv)
		  RSEQ_INJECT_INPUT
		: "memory", "cc", "r17"
		  RSEQ_INJECT_CLOBBER
		: abort, cmpfail
#ifdef RSEQ_COMPARE_TWICE
		  , error1, error2
#endif
	);
	rseq_after_asm_goto();
	return 0;
abort:
	rseq_after_asm_goto();
	RSEQ_INJECT_FAILED
	return -1;
cmpfail:
	rseq_after_asm_goto();
	return 1;
#ifdef RSEQ_COMPARE_TWICE
error1:
	rseq_after_asm_goto();
	rseq_bug("cpu_id comparison failed");
error2:
	rseq_after_asm_goto();
	rseq_bug("expected value comparison failed");
#endif
}

static inline __attribute__((always_inline))
int RSEQ_TEMPLATE_IDENTIFIER(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(3, 1f, 2f, 4f) /* start, commit, abort */
		RSEQ_ASM_DEFINE_EXIT_POINT(1f, %l[cmpfail])
#ifdef RSEQ_COMPARE_TWICE
		RSEQ_ASM_DEFINE_EXIT_POINT(1f, %l[error1])
		RSEQ_ASM_DEFINE_EXIT_POINT(1f, %l[error2])
#endif
		/* setup for mempcy */
		"mr %%r19, %[len]\n\t"
		"mr %%r20, %[src]\n\t"
		"mr %%r21, %[dst]\n\t"
		/* Start rseq by storing table entry pointer into rseq_cs. */
		RSEQ_ASM_STORE_RSEQ_CS(1, 3b, rseq_cs)
		/* cmp cpuid */
		RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, 4f)
		RSEQ_INJECT_ASM(3)
		/* cmp @v equal to @expect */
		RSEQ_ASM_OP_CMPEQ(v, expect, %l[cmpfail])
		RSEQ_INJECT_ASM(4)
#ifdef RSEQ_COMPARE_TWICE
		/* cmp cpuid */
		RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, %l[error1])
		/* cmp @v equal to @expect */
		RSEQ_ASM_OP_CMPEQ(v, expect, %l[error2])
#endif
		/* try memcpy */
		RSEQ_ASM_OP_R_MEMCPY()
		RSEQ_INJECT_ASM(5)
#ifdef RSEQ_TEMPLATE_MO_RELEASE
		/* for 'release' */
		"lwsync\n\t"
#endif
		/* final store */
		RSEQ_ASM_OP_FINAL_STORE(newv, v, 2)
		RSEQ_INJECT_ASM(6)
		/* teardown */
		RSEQ_ASM_DEFINE_ABORT(4, abort)
		: /* gcc asm goto does not allow outputs */
		: [cpu_id]		"r" (cpu),
		  [current_cpu_id]	"m" (rseq_get_abi()->RSEQ_TEMPLATE_CPU_ID_FIELD),
		  [rseq_cs]		"m" (rseq_get_abi()->rseq_cs.arch.ptr),
		  /* final store input */
		  [v]			"m" (*v),
		  [expect]		"r" (expect),
		  [newv]		"r" (newv),
		  /* try memcpy input */
		  [dst]			"r" (dst),
		  [src]			"r" (src),
		  [len]			"r" (len)
		  RSEQ_INJECT_INPUT
		: "memory", "cc", "r17", "r18", "r19", "r20", "r21"
		  RSEQ_INJECT_CLOBBER
		: abort, cmpfail
#ifdef RSEQ_COMPARE_TWICE
		  , error1, error2
#endif
	);
	rseq_after_asm_goto();
	return 0;
abort:
	rseq_after_asm_goto();
	RSEQ_INJECT_FAILED
	return -1;
cmpfail:
	rseq_after_asm_goto();
	return 1;
#ifdef RSEQ_COMPARE_TWICE
error1:
	rseq_after_asm_goto();
	rseq_bug("cpu_id comparison failed");
error2:
	rseq_after_asm_goto();
	rseq_bug("expected value comparison failed");
#endif
}

#endif /* #if (defined(RSEQ_TEMPLATE_MO_RELAXED) || defined(RSEQ_TEMPLATE_MO_RELEASE)) &&
	(defined(RSEQ_TEMPLATE_CPU_ID) || defined(RSEQ_TEMPLATE_MM_CID)) */

#include "rseq-bits-reset.h"