455 lines
12 KiB
C
455 lines
12 KiB
C
|
/* 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"
|