994 lines
27 KiB
C
994 lines
27 KiB
C
|
/* SPDX-License-Identifier: LGPL-2.1 OR MIT */
|
||
|
|
/*
|
||
|
|
* rseq-x86-bits.h
|
||
|
|
*
|
||
|
|
* (C) Copyright 2016-2022 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include "rseq-bits-template.h"
|
||
|
|
|
||
|
|
#ifdef __x86_64__
|
||
|
|
|
||
|
|
#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_ASM_TP_SEGMENT:RSEQ_CS_OFFSET(%[rseq_offset]))
|
||
|
|
RSEQ_ASM_CMP_CPU_ID(cpu_id, RSEQ_ASM_TP_SEGMENT:RSEQ_TEMPLATE_CPU_ID_OFFSET(%[rseq_offset]), 4f)
|
||
|
|
RSEQ_INJECT_ASM(3)
|
||
|
|
"cmpq %[v], %[expect]\n\t"
|
||
|
|
"jnz %l[cmpfail]\n\t"
|
||
|
|
RSEQ_INJECT_ASM(4)
|
||
|
|
#ifdef RSEQ_COMPARE_TWICE
|
||
|
|
RSEQ_ASM_CMP_CPU_ID(cpu_id, RSEQ_ASM_TP_SEGMENT:RSEQ_TEMPLATE_CPU_ID_OFFSET(%[rseq_offset]), %l[error1])
|
||
|
|
"cmpq %[v], %[expect]\n\t"
|
||
|
|
"jnz %l[error2]\n\t"
|
||
|
|
#endif
|
||
|
|
/* final store */
|
||
|
|
"movq %[newv], %[v]\n\t"
|
||
|
|
"2:\n\t"
|
||
|
|
RSEQ_INJECT_ASM(5)
|
||
|
|
RSEQ_ASM_DEFINE_ABORT(4, "", abort)
|
||
|
|
: /* gcc asm goto does not allow outputs */
|
||
|
|
: [cpu_id] "r" (cpu),
|
||
|
|
[rseq_offset] "r" (rseq_offset),
|
||
|
|
[v] "m" (*v),
|
||
|
|
[expect] "r" (expect),
|
||
|
|
[newv] "r" (newv)
|
||
|
|
: "memory", "cc", "rax"
|
||
|
|
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
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Compare @v against @expectnot. When it does _not_ match, load @v
|
||
|
|
* into @load, and store the content of *@v + voffp into @v.
|
||
|
|
*/
|
||
|
|
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_ASM_TP_SEGMENT:RSEQ_CS_OFFSET(%[rseq_offset]))
|
||
|
|
RSEQ_ASM_CMP_CPU_ID(cpu_id, RSEQ_ASM_TP_SEGMENT:RSEQ_TEMPLATE_CPU_ID_OFFSET(%[rseq_offset]), 4f)
|
||
|
|
RSEQ_INJECT_ASM(3)
|
||
|
|
"movq %[v], %%rbx\n\t"
|
||
|
|
"cmpq %%rbx, %[expectnot]\n\t"
|
||
|
|
"je %l[cmpfail]\n\t"
|
||
|
|
RSEQ_INJECT_ASM(4)
|
||
|
|
#ifdef RSEQ_COMPARE_TWICE
|
||
|
|
RSEQ_ASM_CMP_CPU_ID(cpu_id, RSEQ_ASM_TP_SEGMENT:RSEQ_TEMPLATE_CPU_ID_OFFSET(%[rseq_offset]), %l[error1])
|
||
|
|
"movq %[v], %%rbx\n\t"
|
||
|
|
"cmpq %%rbx, %[expectnot]\n\t"
|
||
|
|
"je %l[error2]\n\t"
|
||
|
|
#endif
|
||
|
|
"movq %%rbx, %[load]\n\t"
|
||
|
|
"addq %[voffp], %%rbx\n\t"
|
||
|
|
"movq (%%rbx), %%rbx\n\t"
|
||
|
|
/* final store */
|
||
|
|
"movq %%rbx, %[v]\n\t"
|
||
|
|
"2:\n\t"
|
||
|
|
RSEQ_INJECT_ASM(5)
|
||
|
|
RSEQ_ASM_DEFINE_ABORT(4, "", abort)
|
||
|
|
: /* gcc asm goto does not allow outputs */
|
||
|
|
: [cpu_id] "r" (cpu),
|
||
|
|
[rseq_offset] "r" (rseq_offset),
|
||
|
|
/* final store input */
|
||
|
|
[v] "m" (*v),
|
||
|
|
[expectnot] "r" (expectnot),
|
||
|
|
[voffp] "er" (voffp),
|
||
|
|
[load] "m" (*load)
|
||
|
|
: "memory", "cc", "rax", "rbx"
|
||
|
|
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_ASM_TP_SEGMENT:RSEQ_CS_OFFSET(%[rseq_offset]))
|
||
|
|
RSEQ_ASM_CMP_CPU_ID(cpu_id, RSEQ_ASM_TP_SEGMENT:RSEQ_TEMPLATE_CPU_ID_OFFSET(%[rseq_offset]), 4f)
|
||
|
|
RSEQ_INJECT_ASM(3)
|
||
|
|
#ifdef RSEQ_COMPARE_TWICE
|
||
|
|
RSEQ_ASM_CMP_CPU_ID(cpu_id, RSEQ_ASM_TP_SEGMENT:RSEQ_TEMPLATE_CPU_ID_OFFSET(%[rseq_offset]), %l[error1])
|
||
|
|
#endif
|
||
|
|
/* final store */
|
||
|
|
"addq %[count], %[v]\n\t"
|
||
|
|
"2:\n\t"
|
||
|
|
RSEQ_INJECT_ASM(4)
|
||
|
|
RSEQ_ASM_DEFINE_ABORT(4, "", abort)
|
||
|
|
: /* gcc asm goto does not allow outputs */
|
||
|
|
: [cpu_id] "r" (cpu),
|
||
|
|
[rseq_offset] "r" (rseq_offset),
|
||
|
|
/* final store input */
|
||
|
|
[v] "m" (*v),
|
||
|
|
[count] "er" (count)
|
||
|
|
: "memory", "cc", "rax"
|
||
|
|
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
|
||
|
|
}
|
||
|
|
|
||
|
|
#define RSEQ_ARCH_HAS_OFFSET_DEREF_ADDV
|
||
|
|
|
||
|
|
/*
|
||
|
|
* pval = *(ptr+off)
|
||
|
|
* *pval += inc;
|
||
|
|
*/
|
||
|
|
static inline __attribute__((always_inline))
|
||
|
|
int RSEQ_TEMPLATE_IDENTIFIER(rseq_offset_deref_addv)(intptr_t *ptr, long off, intptr_t inc, 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_ASM_TP_SEGMENT:RSEQ_CS_OFFSET(%[rseq_offset]))
|
||
|
|
RSEQ_ASM_CMP_CPU_ID(cpu_id, RSEQ_ASM_TP_SEGMENT:RSEQ_TEMPLATE_CPU_ID_OFFSET(%[rseq_offset]), 4f)
|
||
|
|
RSEQ_INJECT_ASM(3)
|
||
|
|
#ifdef RSEQ_COMPARE_TWICE
|
||
|
|
RSEQ_ASM_CMP_CPU_ID(cpu_id, RSEQ_ASM_TP_SEGMENT:RSEQ_TEMPLATE_CPU_ID_OFFSET(%[rseq_offset]), %l[error1])
|
||
|
|
#endif
|
||
|
|
/* get p+v */
|
||
|
|
"movq %[ptr], %%rbx\n\t"
|
||
|
|
"addq %[off], %%rbx\n\t"
|
||
|
|
/* get pv */
|
||
|
|
"movq (%%rbx), %%rcx\n\t"
|
||
|
|
/* *pv += inc */
|
||
|
|
"addq %[inc], (%%rcx)\n\t"
|
||
|
|
"2:\n\t"
|
||
|
|
RSEQ_INJECT_ASM(4)
|
||
|
|
RSEQ_ASM_DEFINE_ABORT(4, "", abort)
|
||
|
|
: /* gcc asm goto does not allow outputs */
|
||
|
|
: [cpu_id] "r" (cpu),
|
||
|
|
[rseq_offset] "r" (rseq_offset),
|
||
|
|
/* final store input */
|
||
|
|
[ptr] "m" (*ptr),
|
||
|
|
[off] "er" (off),
|
||
|
|
[inc] "er" (inc)
|
||
|
|
: "memory", "cc", "rax", "rbx", "rcx"
|
||
|
|
RSEQ_INJECT_CLOBBER
|
||
|
|
: 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_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_ASM_TP_SEGMENT:RSEQ_CS_OFFSET(%[rseq_offset]))
|
||
|
|
RSEQ_ASM_CMP_CPU_ID(cpu_id, RSEQ_ASM_TP_SEGMENT:RSEQ_TEMPLATE_CPU_ID_OFFSET(%[rseq_offset]), 4f)
|
||
|
|
RSEQ_INJECT_ASM(3)
|
||
|
|
"cmpq %[v], %[expect]\n\t"
|
||
|
|
"jnz %l[cmpfail]\n\t"
|
||
|
|
RSEQ_INJECT_ASM(4)
|
||
|
|
"cmpq %[v2], %[expect2]\n\t"
|
||
|
|
"jnz %l[cmpfail]\n\t"
|
||
|
|
RSEQ_INJECT_ASM(5)
|
||
|
|
#ifdef RSEQ_COMPARE_TWICE
|
||
|
|
RSEQ_ASM_CMP_CPU_ID(cpu_id, RSEQ_ASM_TP_SEGMENT:RSEQ_TEMPLATE_CPU_ID_OFFSET(%[rseq_offset]), %l[error1])
|
||
|
|
"cmpq %[v], %[expect]\n\t"
|
||
|
|
"jnz %l[error2]\n\t"
|
||
|
|
"cmpq %[v2], %[expect2]\n\t"
|
||
|
|
"jnz %l[error3]\n\t"
|
||
|
|
#endif
|
||
|
|
/* final store */
|
||
|
|
"movq %[newv], %[v]\n\t"
|
||
|
|
"2:\n\t"
|
||
|
|
RSEQ_INJECT_ASM(6)
|
||
|
|
RSEQ_ASM_DEFINE_ABORT(4, "", abort)
|
||
|
|
: /* gcc asm goto does not allow outputs */
|
||
|
|
: [cpu_id] "r" (cpu),
|
||
|
|
[rseq_offset] "r" (rseq_offset),
|
||
|
|
/* cmp2 input */
|
||
|
|
[v2] "m" (*v2),
|
||
|
|
[expect2] "r" (expect2),
|
||
|
|
/* final store input */
|
||
|
|
[v] "m" (*v),
|
||
|
|
[expect] "r" (expect),
|
||
|
|
[newv] "r" (newv)
|
||
|
|
: "memory", "cc", "rax"
|
||
|
|
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_ASM_TP_SEGMENT:RSEQ_CS_OFFSET(%[rseq_offset]))
|
||
|
|
RSEQ_ASM_CMP_CPU_ID(cpu_id, RSEQ_ASM_TP_SEGMENT:RSEQ_TEMPLATE_CPU_ID_OFFSET(%[rseq_offset]), 4f)
|
||
|
|
RSEQ_INJECT_ASM(3)
|
||
|
|
"cmpq %[v], %[expect]\n\t"
|
||
|
|
"jnz %l[cmpfail]\n\t"
|
||
|
|
RSEQ_INJECT_ASM(4)
|
||
|
|
#ifdef RSEQ_COMPARE_TWICE
|
||
|
|
RSEQ_ASM_CMP_CPU_ID(cpu_id, RSEQ_ASM_TP_SEGMENT:RSEQ_TEMPLATE_CPU_ID_OFFSET(%[rseq_offset]), %l[error1])
|
||
|
|
"cmpq %[v], %[expect]\n\t"
|
||
|
|
"jnz %l[error2]\n\t"
|
||
|
|
#endif
|
||
|
|
/* try store */
|
||
|
|
"movq %[newv2], %[v2]\n\t"
|
||
|
|
RSEQ_INJECT_ASM(5)
|
||
|
|
/* final store */
|
||
|
|
"movq %[newv], %[v]\n\t"
|
||
|
|
"2:\n\t"
|
||
|
|
RSEQ_INJECT_ASM(6)
|
||
|
|
RSEQ_ASM_DEFINE_ABORT(4, "", abort)
|
||
|
|
: /* gcc asm goto does not allow outputs */
|
||
|
|
: [cpu_id] "r" (cpu),
|
||
|
|
[rseq_offset] "r" (rseq_offset),
|
||
|
|
/* try store input */
|
||
|
|
[v2] "m" (*v2),
|
||
|
|
[newv2] "r" (newv2),
|
||
|
|
/* final store input */
|
||
|
|
[v] "m" (*v),
|
||
|
|
[expect] "r" (expect),
|
||
|
|
[newv] "r" (newv)
|
||
|
|
: "memory", "cc", "rax"
|
||
|
|
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)
|
||
|
|
{
|
||
|
|
uint64_t rseq_scratch[3];
|
||
|
|
|
||
|
|
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
|
||
|
|
"movq %[src], %[rseq_scratch0]\n\t"
|
||
|
|
"movq %[dst], %[rseq_scratch1]\n\t"
|
||
|
|
"movq %[len], %[rseq_scratch2]\n\t"
|
||
|
|
/* Start rseq by storing table entry pointer into rseq_cs. */
|
||
|
|
RSEQ_ASM_STORE_RSEQ_CS(1, 3b, RSEQ_ASM_TP_SEGMENT:RSEQ_CS_OFFSET(%[rseq_offset]))
|
||
|
|
RSEQ_ASM_CMP_CPU_ID(cpu_id, RSEQ_ASM_TP_SEGMENT:RSEQ_TEMPLATE_CPU_ID_OFFSET(%[rseq_offset]), 4f)
|
||
|
|
RSEQ_INJECT_ASM(3)
|
||
|
|
"cmpq %[v], %[expect]\n\t"
|
||
|
|
"jnz 5f\n\t"
|
||
|
|
RSEQ_INJECT_ASM(4)
|
||
|
|
#ifdef RSEQ_COMPARE_TWICE
|
||
|
|
RSEQ_ASM_CMP_CPU_ID(cpu_id, RSEQ_ASM_TP_SEGMENT:RSEQ_TEMPLATE_CPU_ID_OFFSET(%[rseq_offset]), 6f)
|
||
|
|
"cmpq %[v], %[expect]\n\t"
|
||
|
|
"jnz 7f\n\t"
|
||
|
|
#endif
|
||
|
|
/* try memcpy */
|
||
|
|
"test %[len], %[len]\n\t" \
|
||
|
|
"jz 333f\n\t" \
|
||
|
|
"222:\n\t" \
|
||
|
|
"movb (%[src]), %%al\n\t" \
|
||
|
|
"movb %%al, (%[dst])\n\t" \
|
||
|
|
"inc %[src]\n\t" \
|
||
|
|
"inc %[dst]\n\t" \
|
||
|
|
"dec %[len]\n\t" \
|
||
|
|
"jnz 222b\n\t" \
|
||
|
|
"333:\n\t" \
|
||
|
|
RSEQ_INJECT_ASM(5)
|
||
|
|
/* final store */
|
||
|
|
"movq %[newv], %[v]\n\t"
|
||
|
|
"2:\n\t"
|
||
|
|
RSEQ_INJECT_ASM(6)
|
||
|
|
/* teardown */
|
||
|
|
"movq %[rseq_scratch2], %[len]\n\t"
|
||
|
|
"movq %[rseq_scratch1], %[dst]\n\t"
|
||
|
|
"movq %[rseq_scratch0], %[src]\n\t"
|
||
|
|
RSEQ_ASM_DEFINE_ABORT(4,
|
||
|
|
"movq %[rseq_scratch2], %[len]\n\t"
|
||
|
|
"movq %[rseq_scratch1], %[dst]\n\t"
|
||
|
|
"movq %[rseq_scratch0], %[src]\n\t",
|
||
|
|
abort)
|
||
|
|
RSEQ_ASM_DEFINE_CMPFAIL(5,
|
||
|
|
"movq %[rseq_scratch2], %[len]\n\t"
|
||
|
|
"movq %[rseq_scratch1], %[dst]\n\t"
|
||
|
|
"movq %[rseq_scratch0], %[src]\n\t",
|
||
|
|
cmpfail)
|
||
|
|
#ifdef RSEQ_COMPARE_TWICE
|
||
|
|
RSEQ_ASM_DEFINE_CMPFAIL(6,
|
||
|
|
"movq %[rseq_scratch2], %[len]\n\t"
|
||
|
|
"movq %[rseq_scratch1], %[dst]\n\t"
|
||
|
|
"movq %[rseq_scratch0], %[src]\n\t",
|
||
|
|
error1)
|
||
|
|
RSEQ_ASM_DEFINE_CMPFAIL(7,
|
||
|
|
"movq %[rseq_scratch2], %[len]\n\t"
|
||
|
|
"movq %[rseq_scratch1], %[dst]\n\t"
|
||
|
|
"movq %[rseq_scratch0], %[src]\n\t",
|
||
|
|
error2)
|
||
|
|
#endif
|
||
|
|
: /* gcc asm goto does not allow outputs */
|
||
|
|
: [cpu_id] "r" (cpu),
|
||
|
|
[rseq_offset] "r" (rseq_offset),
|
||
|
|
/* 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_scratch0] "m" (rseq_scratch[0]),
|
||
|
|
[rseq_scratch1] "m" (rseq_scratch[1]),
|
||
|
|
[rseq_scratch2] "m" (rseq_scratch[2])
|
||
|
|
: "memory", "cc", "rax"
|
||
|
|
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)) */
|
||
|
|
|
||
|
|
#elif defined(__i386__)
|
||
|
|
|
||
|
|
#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_ASM_TP_SEGMENT:RSEQ_CS_OFFSET(%[rseq_offset]))
|
||
|
|
RSEQ_ASM_CMP_CPU_ID(cpu_id, RSEQ_ASM_TP_SEGMENT:RSEQ_TEMPLATE_CPU_ID_OFFSET(%[rseq_offset]), 4f)
|
||
|
|
RSEQ_INJECT_ASM(3)
|
||
|
|
"cmpl %[v], %[expect]\n\t"
|
||
|
|
"jnz %l[cmpfail]\n\t"
|
||
|
|
RSEQ_INJECT_ASM(4)
|
||
|
|
#ifdef RSEQ_COMPARE_TWICE
|
||
|
|
RSEQ_ASM_CMP_CPU_ID(cpu_id, RSEQ_ASM_TP_SEGMENT:RSEQ_TEMPLATE_CPU_ID_OFFSET(%[rseq_offset]), %l[error1])
|
||
|
|
"cmpl %[v], %[expect]\n\t"
|
||
|
|
"jnz %l[error2]\n\t"
|
||
|
|
#endif
|
||
|
|
/* final store */
|
||
|
|
"movl %[newv], %[v]\n\t"
|
||
|
|
"2:\n\t"
|
||
|
|
RSEQ_INJECT_ASM(5)
|
||
|
|
RSEQ_ASM_DEFINE_ABORT(4, "", abort)
|
||
|
|
: /* gcc asm goto does not allow outputs */
|
||
|
|
: [cpu_id] "r" (cpu),
|
||
|
|
[rseq_offset] "r" (rseq_offset),
|
||
|
|
[v] "m" (*v),
|
||
|
|
[expect] "r" (expect),
|
||
|
|
[newv] "r" (newv)
|
||
|
|
: "memory", "cc", "eax"
|
||
|
|
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
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Compare @v against @expectnot. When it does _not_ match, load @v
|
||
|
|
* into @load, and store the content of *@v + voffp into @v.
|
||
|
|
*/
|
||
|
|
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_ASM_TP_SEGMENT:RSEQ_CS_OFFSET(%[rseq_offset]))
|
||
|
|
RSEQ_ASM_CMP_CPU_ID(cpu_id, RSEQ_ASM_TP_SEGMENT:RSEQ_TEMPLATE_CPU_ID_OFFSET(%[rseq_offset]), 4f)
|
||
|
|
RSEQ_INJECT_ASM(3)
|
||
|
|
"movl %[v], %%ebx\n\t"
|
||
|
|
"cmpl %%ebx, %[expectnot]\n\t"
|
||
|
|
"je %l[cmpfail]\n\t"
|
||
|
|
RSEQ_INJECT_ASM(4)
|
||
|
|
#ifdef RSEQ_COMPARE_TWICE
|
||
|
|
RSEQ_ASM_CMP_CPU_ID(cpu_id, RSEQ_ASM_TP_SEGMENT:RSEQ_TEMPLATE_CPU_ID_OFFSET(%[rseq_offset]), %l[error1])
|
||
|
|
"movl %[v], %%ebx\n\t"
|
||
|
|
"cmpl %%ebx, %[expectnot]\n\t"
|
||
|
|
"je %l[error2]\n\t"
|
||
|
|
#endif
|
||
|
|
"movl %%ebx, %[load]\n\t"
|
||
|
|
"addl %[voffp], %%ebx\n\t"
|
||
|
|
"movl (%%ebx), %%ebx\n\t"
|
||
|
|
/* final store */
|
||
|
|
"movl %%ebx, %[v]\n\t"
|
||
|
|
"2:\n\t"
|
||
|
|
RSEQ_INJECT_ASM(5)
|
||
|
|
RSEQ_ASM_DEFINE_ABORT(4, "", abort)
|
||
|
|
: /* gcc asm goto does not allow outputs */
|
||
|
|
: [cpu_id] "r" (cpu),
|
||
|
|
[rseq_offset] "r" (rseq_offset),
|
||
|
|
/* final store input */
|
||
|
|
[v] "m" (*v),
|
||
|
|
[expectnot] "r" (expectnot),
|
||
|
|
[voffp] "ir" (voffp),
|
||
|
|
[load] "m" (*load)
|
||
|
|
: "memory", "cc", "eax", "ebx"
|
||
|
|
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_ASM_TP_SEGMENT:RSEQ_CS_OFFSET(%[rseq_offset]))
|
||
|
|
RSEQ_ASM_CMP_CPU_ID(cpu_id, RSEQ_ASM_TP_SEGMENT:RSEQ_TEMPLATE_CPU_ID_OFFSET(%[rseq_offset]), 4f)
|
||
|
|
RSEQ_INJECT_ASM(3)
|
||
|
|
#ifdef RSEQ_COMPARE_TWICE
|
||
|
|
RSEQ_ASM_CMP_CPU_ID(cpu_id, RSEQ_ASM_TP_SEGMENT:RSEQ_TEMPLATE_CPU_ID_OFFSET(%[rseq_offset]), %l[error1])
|
||
|
|
#endif
|
||
|
|
/* final store */
|
||
|
|
"addl %[count], %[v]\n\t"
|
||
|
|
"2:\n\t"
|
||
|
|
RSEQ_INJECT_ASM(4)
|
||
|
|
RSEQ_ASM_DEFINE_ABORT(4, "", abort)
|
||
|
|
: /* gcc asm goto does not allow outputs */
|
||
|
|
: [cpu_id] "r" (cpu),
|
||
|
|
[rseq_offset] "r" (rseq_offset),
|
||
|
|
/* final store input */
|
||
|
|
[v] "m" (*v),
|
||
|
|
[count] "ir" (count)
|
||
|
|
: "memory", "cc", "eax"
|
||
|
|
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_ASM_TP_SEGMENT:RSEQ_CS_OFFSET(%[rseq_offset]))
|
||
|
|
RSEQ_ASM_CMP_CPU_ID(cpu_id, RSEQ_ASM_TP_SEGMENT:RSEQ_TEMPLATE_CPU_ID_OFFSET(%[rseq_offset]), 4f)
|
||
|
|
RSEQ_INJECT_ASM(3)
|
||
|
|
"cmpl %[v], %[expect]\n\t"
|
||
|
|
"jnz %l[cmpfail]\n\t"
|
||
|
|
RSEQ_INJECT_ASM(4)
|
||
|
|
"cmpl %[expect2], %[v2]\n\t"
|
||
|
|
"jnz %l[cmpfail]\n\t"
|
||
|
|
RSEQ_INJECT_ASM(5)
|
||
|
|
#ifdef RSEQ_COMPARE_TWICE
|
||
|
|
RSEQ_ASM_CMP_CPU_ID(cpu_id, RSEQ_ASM_TP_SEGMENT:RSEQ_TEMPLATE_CPU_ID_OFFSET(%[rseq_offset]), %l[error1])
|
||
|
|
"cmpl %[v], %[expect]\n\t"
|
||
|
|
"jnz %l[error2]\n\t"
|
||
|
|
"cmpl %[expect2], %[v2]\n\t"
|
||
|
|
"jnz %l[error3]\n\t"
|
||
|
|
#endif
|
||
|
|
"movl %[newv], %%eax\n\t"
|
||
|
|
/* final store */
|
||
|
|
"movl %%eax, %[v]\n\t"
|
||
|
|
"2:\n\t"
|
||
|
|
RSEQ_INJECT_ASM(6)
|
||
|
|
RSEQ_ASM_DEFINE_ABORT(4, "", abort)
|
||
|
|
: /* gcc asm goto does not allow outputs */
|
||
|
|
: [cpu_id] "r" (cpu),
|
||
|
|
[rseq_offset] "r" (rseq_offset),
|
||
|
|
/* cmp2 input */
|
||
|
|
[v2] "m" (*v2),
|
||
|
|
[expect2] "r" (expect2),
|
||
|
|
/* final store input */
|
||
|
|
[v] "m" (*v),
|
||
|
|
[expect] "r" (expect),
|
||
|
|
[newv] "m" (newv)
|
||
|
|
: "memory", "cc", "eax"
|
||
|
|
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_ASM_TP_SEGMENT:RSEQ_CS_OFFSET(%[rseq_offset]))
|
||
|
|
RSEQ_ASM_CMP_CPU_ID(cpu_id, RSEQ_ASM_TP_SEGMENT:RSEQ_TEMPLATE_CPU_ID_OFFSET(%[rseq_offset]), 4f)
|
||
|
|
RSEQ_INJECT_ASM(3)
|
||
|
|
"movl %[expect], %%eax\n\t"
|
||
|
|
"cmpl %[v], %%eax\n\t"
|
||
|
|
"jnz %l[cmpfail]\n\t"
|
||
|
|
RSEQ_INJECT_ASM(4)
|
||
|
|
#ifdef RSEQ_COMPARE_TWICE
|
||
|
|
RSEQ_ASM_CMP_CPU_ID(cpu_id, RSEQ_ASM_TP_SEGMENT:RSEQ_TEMPLATE_CPU_ID_OFFSET(%[rseq_offset]), %l[error1])
|
||
|
|
"movl %[expect], %%eax\n\t"
|
||
|
|
"cmpl %[v], %%eax\n\t"
|
||
|
|
"jnz %l[error2]\n\t"
|
||
|
|
#endif
|
||
|
|
/* try store */
|
||
|
|
"movl %[newv2], %[v2]\n\t"
|
||
|
|
RSEQ_INJECT_ASM(5)
|
||
|
|
#ifdef RSEQ_TEMPLATE_MO_RELEASE
|
||
|
|
"lock; addl $0,-128(%%esp)\n\t"
|
||
|
|
#endif
|
||
|
|
/* final store */
|
||
|
|
"movl %[newv], %[v]\n\t"
|
||
|
|
"2:\n\t"
|
||
|
|
RSEQ_INJECT_ASM(6)
|
||
|
|
RSEQ_ASM_DEFINE_ABORT(4, "", abort)
|
||
|
|
: /* gcc asm goto does not allow outputs */
|
||
|
|
: [cpu_id] "r" (cpu),
|
||
|
|
[rseq_offset] "r" (rseq_offset),
|
||
|
|
/* try store input */
|
||
|
|
[v2] "m" (*v2),
|
||
|
|
[newv2] "r" (newv2),
|
||
|
|
/* final store input */
|
||
|
|
[v] "m" (*v),
|
||
|
|
[expect] "m" (expect),
|
||
|
|
[newv] "r" (newv)
|
||
|
|
: "memory", "cc", "eax"
|
||
|
|
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
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
/* TODO: implement a faster memcpy. */
|
||
|
|
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)
|
||
|
|
{
|
||
|
|
uint32_t rseq_scratch[3];
|
||
|
|
|
||
|
|
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
|
||
|
|
"movl %[src], %[rseq_scratch0]\n\t"
|
||
|
|
"movl %[dst], %[rseq_scratch1]\n\t"
|
||
|
|
"movl %[len], %[rseq_scratch2]\n\t"
|
||
|
|
/* Start rseq by storing table entry pointer into rseq_cs. */
|
||
|
|
RSEQ_ASM_STORE_RSEQ_CS(1, 3b, RSEQ_ASM_TP_SEGMENT:RSEQ_CS_OFFSET(%[rseq_offset]))
|
||
|
|
RSEQ_ASM_CMP_CPU_ID(cpu_id, RSEQ_ASM_TP_SEGMENT:RSEQ_TEMPLATE_CPU_ID_OFFSET(%[rseq_offset]), 4f)
|
||
|
|
RSEQ_INJECT_ASM(3)
|
||
|
|
"movl %[expect], %%eax\n\t"
|
||
|
|
"cmpl %%eax, %[v]\n\t"
|
||
|
|
"jnz 5f\n\t"
|
||
|
|
RSEQ_INJECT_ASM(4)
|
||
|
|
#ifdef RSEQ_COMPARE_TWICE
|
||
|
|
RSEQ_ASM_CMP_CPU_ID(cpu_id, RSEQ_ASM_TP_SEGMENT:RSEQ_TEMPLATE_CPU_ID_OFFSET(%[rseq_offset]), 6f)
|
||
|
|
"movl %[expect], %%eax\n\t"
|
||
|
|
"cmpl %%eax, %[v]\n\t"
|
||
|
|
"jnz 7f\n\t"
|
||
|
|
#endif
|
||
|
|
/* try memcpy */
|
||
|
|
"test %[len], %[len]\n\t" \
|
||
|
|
"jz 333f\n\t" \
|
||
|
|
"222:\n\t" \
|
||
|
|
"movb (%[src]), %%al\n\t" \
|
||
|
|
"movb %%al, (%[dst])\n\t" \
|
||
|
|
"inc %[src]\n\t" \
|
||
|
|
"inc %[dst]\n\t" \
|
||
|
|
"dec %[len]\n\t" \
|
||
|
|
"jnz 222b\n\t" \
|
||
|
|
"333:\n\t" \
|
||
|
|
RSEQ_INJECT_ASM(5)
|
||
|
|
#ifdef RSEQ_TEMPLATE_MO_RELEASE
|
||
|
|
"lock; addl $0,-128(%%esp)\n\t"
|
||
|
|
#endif
|
||
|
|
"movl %[newv], %%eax\n\t"
|
||
|
|
/* final store */
|
||
|
|
"movl %%eax, %[v]\n\t"
|
||
|
|
"2:\n\t"
|
||
|
|
RSEQ_INJECT_ASM(6)
|
||
|
|
/* teardown */
|
||
|
|
"movl %[rseq_scratch2], %[len]\n\t"
|
||
|
|
"movl %[rseq_scratch1], %[dst]\n\t"
|
||
|
|
"movl %[rseq_scratch0], %[src]\n\t"
|
||
|
|
RSEQ_ASM_DEFINE_ABORT(4,
|
||
|
|
"movl %[rseq_scratch2], %[len]\n\t"
|
||
|
|
"movl %[rseq_scratch1], %[dst]\n\t"
|
||
|
|
"movl %[rseq_scratch0], %[src]\n\t",
|
||
|
|
abort)
|
||
|
|
RSEQ_ASM_DEFINE_CMPFAIL(5,
|
||
|
|
"movl %[rseq_scratch2], %[len]\n\t"
|
||
|
|
"movl %[rseq_scratch1], %[dst]\n\t"
|
||
|
|
"movl %[rseq_scratch0], %[src]\n\t",
|
||
|
|
cmpfail)
|
||
|
|
#ifdef RSEQ_COMPARE_TWICE
|
||
|
|
RSEQ_ASM_DEFINE_CMPFAIL(6,
|
||
|
|
"movl %[rseq_scratch2], %[len]\n\t"
|
||
|
|
"movl %[rseq_scratch1], %[dst]\n\t"
|
||
|
|
"movl %[rseq_scratch0], %[src]\n\t",
|
||
|
|
error1)
|
||
|
|
RSEQ_ASM_DEFINE_CMPFAIL(7,
|
||
|
|
"movl %[rseq_scratch2], %[len]\n\t"
|
||
|
|
"movl %[rseq_scratch1], %[dst]\n\t"
|
||
|
|
"movl %[rseq_scratch0], %[src]\n\t",
|
||
|
|
error2)
|
||
|
|
#endif
|
||
|
|
: /* gcc asm goto does not allow outputs */
|
||
|
|
: [cpu_id] "r" (cpu),
|
||
|
|
[rseq_offset] "r" (rseq_offset),
|
||
|
|
/* final store input */
|
||
|
|
[v] "m" (*v),
|
||
|
|
[expect] "m" (expect),
|
||
|
|
[newv] "m" (newv),
|
||
|
|
/* try memcpy input */
|
||
|
|
[dst] "r" (dst),
|
||
|
|
[src] "r" (src),
|
||
|
|
[len] "r" (len),
|
||
|
|
[rseq_scratch0] "m" (rseq_scratch[0]),
|
||
|
|
[rseq_scratch1] "m" (rseq_scratch[1]),
|
||
|
|
[rseq_scratch2] "m" (rseq_scratch[2])
|
||
|
|
: "memory", "cc", "eax"
|
||
|
|
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)) */
|
||
|
|
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#include "rseq-bits-reset.h"
|