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selftests/rseq: x86: Template memory ordering and percpu access mode
Introduce a rseq-x86-bits.h template header which is internally included to generate the static inline functions covering: - relaxed and release memory ordering, - per-cpu-id and per-mm-cid per-cpu data access. This introduces changes to the rseq.h selftests API which require to update the rseq selftest programs. Similar API/templating changes need to be done for other architectures. Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Link: https://lore.kernel.org/r/20221122203932.231377-12-mathieu.desnoyers@efficios.com
This commit is contained in:
Mathieu Desnoyers
Peter Zijlstra
parent
18c2355838
commit
ae31573843
@ -27,4 +27,10 @@
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*/
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#define rseq_after_asm_goto() asm volatile ("" : : : "memory")
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/* Combine two tokens. */
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#define RSEQ__COMBINE_TOKENS(_tokena, _tokenb) \
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_tokena##_tokenb
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#define RSEQ_COMBINE_TOKENS(_tokena, _tokenb) \
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RSEQ__COMBINE_TOKENS(_tokena, _tokenb)
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#endif /* RSEQ_COMPILER_H_ */
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11
tools/testing/selftests/rseq/rseq-bits-reset.h
Normal file
11
tools/testing/selftests/rseq/rseq-bits-reset.h
Normal file
@ -0,0 +1,11 @@
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/* SPDX-License-Identifier: LGPL-2.1 OR MIT */
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/*
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* rseq-bits-reset.h
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*
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* (C) Copyright 2016-2022 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
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*/
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#undef RSEQ_TEMPLATE_IDENTIFIER
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#undef RSEQ_TEMPLATE_CPU_ID_FIELD
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#undef RSEQ_TEMPLATE_CPU_ID_OFFSET
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#undef RSEQ_TEMPLATE_SUFFIX
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41
tools/testing/selftests/rseq/rseq-bits-template.h
Normal file
41
tools/testing/selftests/rseq/rseq-bits-template.h
Normal file
@ -0,0 +1,41 @@
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/* SPDX-License-Identifier: LGPL-2.1 OR MIT */
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/*
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* rseq-bits-template.h
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*
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* (C) Copyright 2016-2022 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
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*/
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#ifdef RSEQ_TEMPLATE_CPU_ID
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# define RSEQ_TEMPLATE_CPU_ID_OFFSET RSEQ_CPU_ID_OFFSET
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# define RSEQ_TEMPLATE_CPU_ID_FIELD cpu_id
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# ifdef RSEQ_TEMPLATE_MO_RELEASE
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# define RSEQ_TEMPLATE_SUFFIX _release_cpu_id
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# elif defined (RSEQ_TEMPLATE_MO_RELAXED)
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# define RSEQ_TEMPLATE_SUFFIX _relaxed_cpu_id
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# else
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# error "Never use <rseq-bits-template.h> directly; include <rseq.h> instead."
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# endif
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#elif defined(RSEQ_TEMPLATE_MM_CID)
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# define RSEQ_TEMPLATE_CPU_ID_OFFSET RSEQ_MM_CID_OFFSET
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# define RSEQ_TEMPLATE_CPU_ID_FIELD mm_cid
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# ifdef RSEQ_TEMPLATE_MO_RELEASE
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# define RSEQ_TEMPLATE_SUFFIX _release_mm_cid
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# elif defined (RSEQ_TEMPLATE_MO_RELAXED)
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# define RSEQ_TEMPLATE_SUFFIX _relaxed_mm_cid
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# else
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# error "Never use <rseq-bits-template.h> directly; include <rseq.h> instead."
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# endif
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#elif defined (RSEQ_TEMPLATE_CPU_ID_NONE)
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# ifdef RSEQ_TEMPLATE_MO_RELEASE
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# define RSEQ_TEMPLATE_SUFFIX _release
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# elif defined (RSEQ_TEMPLATE_MO_RELAXED)
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# define RSEQ_TEMPLATE_SUFFIX _relaxed
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# else
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# error "Never use <rseq-bits-template.h> directly; include <rseq.h> instead."
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# endif
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#else
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# error "Never use <rseq-bits-template.h> directly; include <rseq.h> instead."
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#endif
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#define RSEQ_TEMPLATE_IDENTIFIER(x) RSEQ_COMBINE_TOKENS(x, RSEQ_TEMPLATE_SUFFIX)
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993
tools/testing/selftests/rseq/rseq-x86-bits.h
Normal file
993
tools/testing/selftests/rseq/rseq-x86-bits.h
Normal file
@ -0,0 +1,993 @@
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/* SPDX-License-Identifier: LGPL-2.1 OR MIT */
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/*
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* rseq-x86-bits.h
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*
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* (C) Copyright 2016-2022 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
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*/
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#include "rseq-bits-template.h"
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#ifdef __x86_64__
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#if defined(RSEQ_TEMPLATE_MO_RELAXED) && \
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(defined(RSEQ_TEMPLATE_CPU_ID) || defined(RSEQ_TEMPLATE_MM_CID))
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static inline __attribute__((always_inline))
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int RSEQ_TEMPLATE_IDENTIFIER(rseq_cmpeqv_storev)(intptr_t *v, intptr_t expect, intptr_t newv, int cpu)
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{
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RSEQ_INJECT_C(9)
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__asm__ __volatile__ goto (
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RSEQ_ASM_DEFINE_TABLE(3, 1f, 2f, 4f) /* start, commit, abort */
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RSEQ_ASM_DEFINE_EXIT_POINT(1f, %l[cmpfail])
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#ifdef RSEQ_COMPARE_TWICE
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RSEQ_ASM_DEFINE_EXIT_POINT(1f, %l[error1])
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RSEQ_ASM_DEFINE_EXIT_POINT(1f, %l[error2])
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#endif
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/* Start rseq by storing table entry pointer into rseq_cs. */
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RSEQ_ASM_STORE_RSEQ_CS(1, 3b, RSEQ_ASM_TP_SEGMENT:RSEQ_CS_OFFSET(%[rseq_offset]))
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RSEQ_ASM_CMP_CPU_ID(cpu_id, RSEQ_ASM_TP_SEGMENT:RSEQ_TEMPLATE_CPU_ID_OFFSET(%[rseq_offset]), 4f)
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RSEQ_INJECT_ASM(3)
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"cmpq %[v], %[expect]\n\t"
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"jnz %l[cmpfail]\n\t"
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RSEQ_INJECT_ASM(4)
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#ifdef RSEQ_COMPARE_TWICE
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RSEQ_ASM_CMP_CPU_ID(cpu_id, RSEQ_ASM_TP_SEGMENT:RSEQ_TEMPLATE_CPU_ID_OFFSET(%[rseq_offset]), %l[error1])
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"cmpq %[v], %[expect]\n\t"
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"jnz %l[error2]\n\t"
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#endif
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/* final store */
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"movq %[newv], %[v]\n\t"
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"2:\n\t"
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RSEQ_INJECT_ASM(5)
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RSEQ_ASM_DEFINE_ABORT(4, "", abort)
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: /* gcc asm goto does not allow outputs */
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: [cpu_id] "r" (cpu),
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[rseq_offset] "r" (rseq_offset),
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[v] "m" (*v),
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[expect] "r" (expect),
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[newv] "r" (newv)
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: "memory", "cc", "rax"
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RSEQ_INJECT_CLOBBER
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: abort, cmpfail
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#ifdef RSEQ_COMPARE_TWICE
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, error1, error2
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#endif
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);
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rseq_after_asm_goto();
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return 0;
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abort:
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rseq_after_asm_goto();
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RSEQ_INJECT_FAILED
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return -1;
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cmpfail:
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rseq_after_asm_goto();
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return 1;
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#ifdef RSEQ_COMPARE_TWICE
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error1:
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rseq_after_asm_goto();
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rseq_bug("cpu_id comparison failed");
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error2:
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rseq_after_asm_goto();
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rseq_bug("expected value comparison failed");
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#endif
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}
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/*
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* Compare @v against @expectnot. When it does _not_ match, load @v
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* into @load, and store the content of *@v + voffp into @v.
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*/
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static inline __attribute__((always_inline))
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int RSEQ_TEMPLATE_IDENTIFIER(rseq_cmpnev_storeoffp_load)(intptr_t *v, intptr_t expectnot,
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long voffp, intptr_t *load, int cpu)
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{
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RSEQ_INJECT_C(9)
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__asm__ __volatile__ goto (
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RSEQ_ASM_DEFINE_TABLE(3, 1f, 2f, 4f) /* start, commit, abort */
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RSEQ_ASM_DEFINE_EXIT_POINT(1f, %l[cmpfail])
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#ifdef RSEQ_COMPARE_TWICE
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RSEQ_ASM_DEFINE_EXIT_POINT(1f, %l[error1])
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RSEQ_ASM_DEFINE_EXIT_POINT(1f, %l[error2])
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#endif
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/* Start rseq by storing table entry pointer into rseq_cs. */
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RSEQ_ASM_STORE_RSEQ_CS(1, 3b, RSEQ_ASM_TP_SEGMENT:RSEQ_CS_OFFSET(%[rseq_offset]))
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RSEQ_ASM_CMP_CPU_ID(cpu_id, RSEQ_ASM_TP_SEGMENT:RSEQ_TEMPLATE_CPU_ID_OFFSET(%[rseq_offset]), 4f)
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RSEQ_INJECT_ASM(3)
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"movq %[v], %%rbx\n\t"
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"cmpq %%rbx, %[expectnot]\n\t"
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"je %l[cmpfail]\n\t"
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RSEQ_INJECT_ASM(4)
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#ifdef RSEQ_COMPARE_TWICE
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RSEQ_ASM_CMP_CPU_ID(cpu_id, RSEQ_ASM_TP_SEGMENT:RSEQ_TEMPLATE_CPU_ID_OFFSET(%[rseq_offset]), %l[error1])
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"movq %[v], %%rbx\n\t"
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"cmpq %%rbx, %[expectnot]\n\t"
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"je %l[error2]\n\t"
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#endif
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"movq %%rbx, %[load]\n\t"
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"addq %[voffp], %%rbx\n\t"
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"movq (%%rbx), %%rbx\n\t"
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/* final store */
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"movq %%rbx, %[v]\n\t"
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"2:\n\t"
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RSEQ_INJECT_ASM(5)
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RSEQ_ASM_DEFINE_ABORT(4, "", abort)
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: /* gcc asm goto does not allow outputs */
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: [cpu_id] "r" (cpu),
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[rseq_offset] "r" (rseq_offset),
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/* final store input */
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[v] "m" (*v),
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[expectnot] "r" (expectnot),
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[voffp] "er" (voffp),
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[load] "m" (*load)
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: "memory", "cc", "rax", "rbx"
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RSEQ_INJECT_CLOBBER
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: abort, cmpfail
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#ifdef RSEQ_COMPARE_TWICE
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, error1, error2
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#endif
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);
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rseq_after_asm_goto();
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return 0;
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abort:
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rseq_after_asm_goto();
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RSEQ_INJECT_FAILED
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return -1;
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cmpfail:
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rseq_after_asm_goto();
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return 1;
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#ifdef RSEQ_COMPARE_TWICE
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error1:
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rseq_after_asm_goto();
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rseq_bug("cpu_id comparison failed");
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error2:
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rseq_after_asm_goto();
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rseq_bug("expected value comparison failed");
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#endif
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}
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static inline __attribute__((always_inline))
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int RSEQ_TEMPLATE_IDENTIFIER(rseq_addv)(intptr_t *v, intptr_t count, int cpu)
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{
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RSEQ_INJECT_C(9)
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__asm__ __volatile__ goto (
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RSEQ_ASM_DEFINE_TABLE(3, 1f, 2f, 4f) /* start, commit, abort */
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#ifdef RSEQ_COMPARE_TWICE
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RSEQ_ASM_DEFINE_EXIT_POINT(1f, %l[error1])
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#endif
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/* Start rseq by storing table entry pointer into rseq_cs. */
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RSEQ_ASM_STORE_RSEQ_CS(1, 3b, RSEQ_ASM_TP_SEGMENT:RSEQ_CS_OFFSET(%[rseq_offset]))
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RSEQ_ASM_CMP_CPU_ID(cpu_id, RSEQ_ASM_TP_SEGMENT:RSEQ_TEMPLATE_CPU_ID_OFFSET(%[rseq_offset]), 4f)
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RSEQ_INJECT_ASM(3)
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#ifdef RSEQ_COMPARE_TWICE
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RSEQ_ASM_CMP_CPU_ID(cpu_id, RSEQ_ASM_TP_SEGMENT:RSEQ_TEMPLATE_CPU_ID_OFFSET(%[rseq_offset]), %l[error1])
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#endif
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/* final store */
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"addq %[count], %[v]\n\t"
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"2:\n\t"
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RSEQ_INJECT_ASM(4)
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RSEQ_ASM_DEFINE_ABORT(4, "", abort)
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: /* gcc asm goto does not allow outputs */
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: [cpu_id] "r" (cpu),
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[rseq_offset] "r" (rseq_offset),
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/* final store input */
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[v] "m" (*v),
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[count] "er" (count)
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: "memory", "cc", "rax"
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RSEQ_INJECT_CLOBBER
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: abort
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#ifdef RSEQ_COMPARE_TWICE
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, error1
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#endif
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);
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rseq_after_asm_goto();
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return 0;
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abort:
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rseq_after_asm_goto();
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RSEQ_INJECT_FAILED
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return -1;
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#ifdef RSEQ_COMPARE_TWICE
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error1:
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rseq_after_asm_goto();
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rseq_bug("cpu_id comparison failed");
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#endif
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}
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#define RSEQ_ARCH_HAS_OFFSET_DEREF_ADDV
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/*
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* pval = *(ptr+off)
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* *pval += inc;
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*/
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static inline __attribute__((always_inline))
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int RSEQ_TEMPLATE_IDENTIFIER(rseq_offset_deref_addv)(intptr_t *ptr, long off, intptr_t inc, int cpu)
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{
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RSEQ_INJECT_C(9)
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__asm__ __volatile__ goto (
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RSEQ_ASM_DEFINE_TABLE(3, 1f, 2f, 4f) /* start, commit, abort */
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#ifdef RSEQ_COMPARE_TWICE
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RSEQ_ASM_DEFINE_EXIT_POINT(1f, %l[error1])
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#endif
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/* Start rseq by storing table entry pointer into rseq_cs. */
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RSEQ_ASM_STORE_RSEQ_CS(1, 3b, RSEQ_ASM_TP_SEGMENT:RSEQ_CS_OFFSET(%[rseq_offset]))
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RSEQ_ASM_CMP_CPU_ID(cpu_id, RSEQ_ASM_TP_SEGMENT:RSEQ_TEMPLATE_CPU_ID_OFFSET(%[rseq_offset]), 4f)
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RSEQ_INJECT_ASM(3)
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#ifdef RSEQ_COMPARE_TWICE
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RSEQ_ASM_CMP_CPU_ID(cpu_id, RSEQ_ASM_TP_SEGMENT:RSEQ_TEMPLATE_CPU_ID_OFFSET(%[rseq_offset]), %l[error1])
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#endif
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/* get p+v */
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"movq %[ptr], %%rbx\n\t"
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"addq %[off], %%rbx\n\t"
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/* get pv */
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"movq (%%rbx), %%rcx\n\t"
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/* *pv += inc */
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"addq %[inc], (%%rcx)\n\t"
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"2:\n\t"
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RSEQ_INJECT_ASM(4)
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RSEQ_ASM_DEFINE_ABORT(4, "", abort)
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: /* gcc asm goto does not allow outputs */
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: [cpu_id] "r" (cpu),
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[rseq_offset] "r" (rseq_offset),
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/* final store input */
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[ptr] "m" (*ptr),
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[off] "er" (off),
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[inc] "er" (inc)
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: "memory", "cc", "rax", "rbx", "rcx"
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RSEQ_INJECT_CLOBBER
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: abort
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#ifdef RSEQ_COMPARE_TWICE
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, error1
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#endif
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);
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return 0;
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abort:
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RSEQ_INJECT_FAILED
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return -1;
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#ifdef RSEQ_COMPARE_TWICE
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error1:
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rseq_bug("cpu_id comparison failed");
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#endif
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}
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static inline __attribute__((always_inline))
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int RSEQ_TEMPLATE_IDENTIFIER(rseq_cmpeqv_cmpeqv_storev)(intptr_t *v, intptr_t expect,
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intptr_t *v2, intptr_t expect2,
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intptr_t newv, int cpu)
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{
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RSEQ_INJECT_C(9)
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__asm__ __volatile__ goto (
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RSEQ_ASM_DEFINE_TABLE(3, 1f, 2f, 4f) /* start, commit, abort */
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RSEQ_ASM_DEFINE_EXIT_POINT(1f, %l[cmpfail])
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#ifdef RSEQ_COMPARE_TWICE
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RSEQ_ASM_DEFINE_EXIT_POINT(1f, %l[error1])
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RSEQ_ASM_DEFINE_EXIT_POINT(1f, %l[error2])
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RSEQ_ASM_DEFINE_EXIT_POINT(1f, %l[error3])
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#endif
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/* Start rseq by storing table entry pointer into rseq_cs. */
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RSEQ_ASM_STORE_RSEQ_CS(1, 3b, RSEQ_ASM_TP_SEGMENT:RSEQ_CS_OFFSET(%[rseq_offset]))
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RSEQ_ASM_CMP_CPU_ID(cpu_id, RSEQ_ASM_TP_SEGMENT:RSEQ_TEMPLATE_CPU_ID_OFFSET(%[rseq_offset]), 4f)
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RSEQ_INJECT_ASM(3)
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"cmpq %[v], %[expect]\n\t"
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"jnz %l[cmpfail]\n\t"
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RSEQ_INJECT_ASM(4)
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"cmpq %[v2], %[expect2]\n\t"
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"jnz %l[cmpfail]\n\t"
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RSEQ_INJECT_ASM(5)
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#ifdef RSEQ_COMPARE_TWICE
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RSEQ_ASM_CMP_CPU_ID(cpu_id, RSEQ_ASM_TP_SEGMENT:RSEQ_TEMPLATE_CPU_ID_OFFSET(%[rseq_offset]), %l[error1])
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"cmpq %[v], %[expect]\n\t"
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"jnz %l[error2]\n\t"
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"cmpq %[v2], %[expect2]\n\t"
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"jnz %l[error3]\n\t"
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#endif
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/* final store */
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"movq %[newv], %[v]\n\t"
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"2:\n\t"
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RSEQ_INJECT_ASM(6)
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RSEQ_ASM_DEFINE_ABORT(4, "", abort)
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: /* gcc asm goto does not allow outputs */
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: [cpu_id] "r" (cpu),
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[rseq_offset] "r" (rseq_offset),
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/* cmp2 input */
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[v2] "m" (*v2),
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[expect2] "r" (expect2),
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/* final store input */
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[v] "m" (*v),
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[expect] "r" (expect),
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[newv] "r" (newv)
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: "memory", "cc", "rax"
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RSEQ_INJECT_CLOBBER
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: abort, cmpfail
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#ifdef RSEQ_COMPARE_TWICE
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, error1, error2, error3
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#endif
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);
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rseq_after_asm_goto();
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return 0;
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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"
|
||||
File diff suppressed because it is too large
Load Diff
@ -74,6 +74,20 @@ extern unsigned int rseq_flags;
|
||||
*/
|
||||
extern unsigned int rseq_feature_size;
|
||||
|
||||
enum rseq_mo {
|
||||
RSEQ_MO_RELAXED = 0,
|
||||
RSEQ_MO_CONSUME = 1, /* Unused */
|
||||
RSEQ_MO_ACQUIRE = 2, /* Unused */
|
||||
RSEQ_MO_RELEASE = 3,
|
||||
RSEQ_MO_ACQ_REL = 4, /* Unused */
|
||||
RSEQ_MO_SEQ_CST = 5, /* Unused */
|
||||
};
|
||||
|
||||
enum rseq_percpu_mode {
|
||||
RSEQ_PERCPU_CPU_ID = 0,
|
||||
RSEQ_PERCPU_MM_CID = 1,
|
||||
};
|
||||
|
||||
static inline struct rseq_abi *rseq_get_abi(void)
|
||||
{
|
||||
return (struct rseq_abi *) ((uintptr_t) rseq_thread_pointer() + rseq_offset);
|
||||
@ -222,4 +236,149 @@ static inline void rseq_prepare_unload(void)
|
||||
rseq_clear_rseq_cs();
|
||||
}
|
||||
|
||||
static inline __attribute__((always_inline))
|
||||
int rseq_cmpeqv_storev(enum rseq_mo rseq_mo, enum rseq_percpu_mode percpu_mode,
|
||||
intptr_t *v, intptr_t expect,
|
||||
intptr_t newv, int cpu)
|
||||
{
|
||||
if (rseq_mo != RSEQ_MO_RELAXED)
|
||||
return -1;
|
||||
switch (percpu_mode) {
|
||||
case RSEQ_PERCPU_CPU_ID:
|
||||
return rseq_cmpeqv_storev_relaxed_cpu_id(v, expect, newv, cpu);
|
||||
case RSEQ_PERCPU_MM_CID:
|
||||
return rseq_cmpeqv_storev_relaxed_mm_cid(v, expect, newv, cpu);
|
||||
}
|
||||
return -1;
|
||||
}
|
||||
|
||||
/*
|
||||
* 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_cmpnev_storeoffp_load(enum rseq_mo rseq_mo, enum rseq_percpu_mode percpu_mode,
|
||||
intptr_t *v, intptr_t expectnot, long voffp, intptr_t *load,
|
||||
int cpu)
|
||||
{
|
||||
if (rseq_mo != RSEQ_MO_RELAXED)
|
||||
return -1;
|
||||
switch (percpu_mode) {
|
||||
case RSEQ_PERCPU_CPU_ID:
|
||||
return rseq_cmpnev_storeoffp_load_relaxed_cpu_id(v, expectnot, voffp, load, cpu);
|
||||
case RSEQ_PERCPU_MM_CID:
|
||||
return rseq_cmpnev_storeoffp_load_relaxed_mm_cid(v, expectnot, voffp, load, cpu);
|
||||
}
|
||||
return -1;
|
||||
}
|
||||
|
||||
static inline __attribute__((always_inline))
|
||||
int rseq_addv(enum rseq_mo rseq_mo, enum rseq_percpu_mode percpu_mode,
|
||||
intptr_t *v, intptr_t count, int cpu)
|
||||
{
|
||||
if (rseq_mo != RSEQ_MO_RELAXED)
|
||||
return -1;
|
||||
switch (percpu_mode) {
|
||||
case RSEQ_PERCPU_CPU_ID:
|
||||
return rseq_addv_relaxed_cpu_id(v, count, cpu);
|
||||
case RSEQ_PERCPU_MM_CID:
|
||||
return rseq_addv_relaxed_mm_cid(v, count, cpu);
|
||||
}
|
||||
return -1;
|
||||
}
|
||||
|
||||
#ifdef RSEQ_ARCH_HAS_OFFSET_DEREF_ADDV
|
||||
/*
|
||||
* pval = *(ptr+off)
|
||||
* *pval += inc;
|
||||
*/
|
||||
static inline __attribute__((always_inline))
|
||||
int rseq_offset_deref_addv(enum rseq_mo rseq_mo, enum rseq_percpu_mode percpu_mode,
|
||||
intptr_t *ptr, long off, intptr_t inc, int cpu)
|
||||
{
|
||||
if (rseq_mo != RSEQ_MO_RELAXED)
|
||||
return -1;
|
||||
switch (percpu_mode) {
|
||||
case RSEQ_PERCPU_CPU_ID:
|
||||
return rseq_offset_deref_addv_relaxed_cpu_id(ptr, off, inc, cpu);
|
||||
case RSEQ_PERCPU_MM_CID:
|
||||
return rseq_offset_deref_addv_relaxed_mm_cid(ptr, off, inc, cpu);
|
||||
}
|
||||
return -1;
|
||||
}
|
||||
#endif
|
||||
|
||||
static inline __attribute__((always_inline))
|
||||
int rseq_cmpeqv_trystorev_storev(enum rseq_mo rseq_mo, enum rseq_percpu_mode percpu_mode,
|
||||
intptr_t *v, intptr_t expect,
|
||||
intptr_t *v2, intptr_t newv2,
|
||||
intptr_t newv, int cpu)
|
||||
{
|
||||
switch (rseq_mo) {
|
||||
case RSEQ_MO_RELAXED:
|
||||
switch (percpu_mode) {
|
||||
case RSEQ_PERCPU_CPU_ID:
|
||||
return rseq_cmpeqv_trystorev_storev_relaxed_cpu_id(v, expect, v2, newv2, newv, cpu);
|
||||
case RSEQ_PERCPU_MM_CID:
|
||||
return rseq_cmpeqv_trystorev_storev_relaxed_mm_cid(v, expect, v2, newv2, newv, cpu);
|
||||
}
|
||||
return -1;
|
||||
case RSEQ_MO_RELEASE:
|
||||
switch (percpu_mode) {
|
||||
case RSEQ_PERCPU_CPU_ID:
|
||||
return rseq_cmpeqv_trystorev_storev_release_cpu_id(v, expect, v2, newv2, newv, cpu);
|
||||
case RSEQ_PERCPU_MM_CID:
|
||||
return rseq_cmpeqv_trystorev_storev_release_mm_cid(v, expect, v2, newv2, newv, cpu);
|
||||
}
|
||||
return -1;
|
||||
default:
|
||||
return -1;
|
||||
}
|
||||
}
|
||||
|
||||
static inline __attribute__((always_inline))
|
||||
int rseq_cmpeqv_cmpeqv_storev(enum rseq_mo rseq_mo, enum rseq_percpu_mode percpu_mode,
|
||||
intptr_t *v, intptr_t expect,
|
||||
intptr_t *v2, intptr_t expect2,
|
||||
intptr_t newv, int cpu)
|
||||
{
|
||||
if (rseq_mo != RSEQ_MO_RELAXED)
|
||||
return -1;
|
||||
switch (percpu_mode) {
|
||||
case RSEQ_PERCPU_CPU_ID:
|
||||
return rseq_cmpeqv_cmpeqv_storev_relaxed_cpu_id(v, expect, v2, expect2, newv, cpu);
|
||||
case RSEQ_PERCPU_MM_CID:
|
||||
return rseq_cmpeqv_cmpeqv_storev_relaxed_mm_cid(v, expect, v2, expect2, newv, cpu);
|
||||
}
|
||||
return -1;
|
||||
}
|
||||
|
||||
static inline __attribute__((always_inline))
|
||||
int rseq_cmpeqv_trymemcpy_storev(enum rseq_mo rseq_mo, enum rseq_percpu_mode percpu_mode,
|
||||
intptr_t *v, intptr_t expect,
|
||||
void *dst, void *src, size_t len,
|
||||
intptr_t newv, int cpu)
|
||||
{
|
||||
switch (rseq_mo) {
|
||||
case RSEQ_MO_RELAXED:
|
||||
switch (percpu_mode) {
|
||||
case RSEQ_PERCPU_CPU_ID:
|
||||
return rseq_cmpeqv_trymemcpy_storev_relaxed_cpu_id(v, expect, dst, src, len, newv, cpu);
|
||||
case RSEQ_PERCPU_MM_CID:
|
||||
return rseq_cmpeqv_trymemcpy_storev_relaxed_mm_cid(v, expect, dst, src, len, newv, cpu);
|
||||
}
|
||||
return -1;
|
||||
case RSEQ_MO_RELEASE:
|
||||
switch (percpu_mode) {
|
||||
case RSEQ_PERCPU_CPU_ID:
|
||||
return rseq_cmpeqv_trymemcpy_storev_release_cpu_id(v, expect, dst, src, len, newv, cpu);
|
||||
case RSEQ_PERCPU_MM_CID:
|
||||
return rseq_cmpeqv_trymemcpy_storev_release_mm_cid(v, expect, dst, src, len, newv, cpu);
|
||||
}
|
||||
return -1;
|
||||
default:
|
||||
return -1;
|
||||
}
|
||||
}
|
||||
|
||||
#endif /* RSEQ_H_ */
|
||||
|
||||
Loading…
Reference in New Issue
Block a user