[PATCH v4 13/25] selftests/rseq: x86: Template memory ordering and percpu access mode
From: Mathieu Desnoyers
Date: Thu Sep 22 2022 - 07:06:10 EST
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-vm-vcpu-id 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@xxxxxxxxxxxx>
---
tools/testing/selftests/rseq/compiler.h | 6 +
.../testing/selftests/rseq/rseq-bits-reset.h | 10 +
.../selftests/rseq/rseq-bits-template.h | 39 +
tools/testing/selftests/rseq/rseq-x86-bits.h | 993 ++++++++++++++
tools/testing/selftests/rseq/rseq-x86.h | 1181 +----------------
tools/testing/selftests/rseq/rseq.h | 159 +++
6 files changed, 1238 insertions(+), 1150 deletions(-)
create mode 100644 tools/testing/selftests/rseq/rseq-bits-reset.h
create mode 100644 tools/testing/selftests/rseq/rseq-bits-template.h
create mode 100644 tools/testing/selftests/rseq/rseq-x86-bits.h
diff --git a/tools/testing/selftests/rseq/compiler.h b/tools/testing/selftests/rseq/compiler.h
index 876eb6a7f75b..f47092bddeba 100644
--- a/tools/testing/selftests/rseq/compiler.h
+++ b/tools/testing/selftests/rseq/compiler.h
@@ -27,4 +27,10 @@
*/
#define rseq_after_asm_goto() asm volatile ("" : : : "memory")
+/* Combine two tokens. */
+#define RSEQ__COMBINE_TOKENS(_tokena, _tokenb) \
+ _tokena##_tokenb
+#define RSEQ_COMBINE_TOKENS(_tokena, _tokenb) \
+ RSEQ__COMBINE_TOKENS(_tokena, _tokenb)
+
#endif /* RSEQ_COMPILER_H_ */
diff --git a/tools/testing/selftests/rseq/rseq-bits-reset.h b/tools/testing/selftests/rseq/rseq-bits-reset.h
new file mode 100644
index 000000000000..3016070212f3
--- /dev/null
+++ b/tools/testing/selftests/rseq/rseq-bits-reset.h
@@ -0,0 +1,10 @@
+/* SPDX-License-Identifier: LGPL-2.1 OR MIT */
+/*
+ * rseq-bits-reset.h
+ *
+ * (C) Copyright 2016-2022 - Mathieu Desnoyers <mathieu.desnoyers@xxxxxxxxxxxx>
+ */
+
+#undef RSEQ_TEMPLATE_IDENTIFIER
+#undef RSEQ_TEMPLATE_CPU_ID_OFFSET
+#undef RSEQ_TEMPLATE_SUFFIX
diff --git a/tools/testing/selftests/rseq/rseq-bits-template.h b/tools/testing/selftests/rseq/rseq-bits-template.h
new file mode 100644
index 000000000000..ea0fe06ef314
--- /dev/null
+++ b/tools/testing/selftests/rseq/rseq-bits-template.h
@@ -0,0 +1,39 @@
+/* SPDX-License-Identifier: LGPL-2.1 OR MIT */
+/*
+ * rseq-bits-template.h
+ *
+ * (C) Copyright 2016-2022 - Mathieu Desnoyers <mathieu.desnoyers@xxxxxxxxxxxx>
+ */
+
+#ifdef RSEQ_TEMPLATE_CPU_ID
+# define RSEQ_TEMPLATE_CPU_ID_OFFSET RSEQ_CPU_ID_OFFSET
+# ifdef RSEQ_TEMPLATE_MO_RELEASE
+# define RSEQ_TEMPLATE_SUFFIX _release_cpu_id
+# elif defined (RSEQ_TEMPLATE_MO_RELAXED)
+# define RSEQ_TEMPLATE_SUFFIX _relaxed_cpu_id
+# else
+# error "Never use <rseq-bits-template.h> directly; include <rseq.h> instead."
+# endif
+#elif defined(RSEQ_TEMPLATE_VM_VCPU_ID)
+# define RSEQ_TEMPLATE_CPU_ID_OFFSET RSEQ_VM_VCPU_ID_OFFSET
+# ifdef RSEQ_TEMPLATE_MO_RELEASE
+# define RSEQ_TEMPLATE_SUFFIX _release_vm_vcpu_id
+# elif defined (RSEQ_TEMPLATE_MO_RELAXED)
+# define RSEQ_TEMPLATE_SUFFIX _relaxed_vm_vcpu_id
+# else
+# error "Never use <rseq-bits-template.h> directly; include <rseq.h> instead."
+# endif
+#elif defined (RSEQ_TEMPLATE_CPU_ID_NONE)
+# ifdef RSEQ_TEMPLATE_MO_RELEASE
+# define RSEQ_TEMPLATE_SUFFIX _release
+# elif defined (RSEQ_TEMPLATE_MO_RELAXED)
+# define RSEQ_TEMPLATE_SUFFIX _relaxed
+# else
+# error "Never use <rseq-bits-template.h> directly; include <rseq.h> instead."
+# endif
+#else
+# error "Never use <rseq-bits-template.h> directly; include <rseq.h> instead."
+#endif
+
+#define RSEQ_TEMPLATE_IDENTIFIER(x) RSEQ_COMBINE_TOKENS(x, RSEQ_TEMPLATE_SUFFIX)
+
diff --git a/tools/testing/selftests/rseq/rseq-x86-bits.h b/tools/testing/selftests/rseq/rseq-x86-bits.h
new file mode 100644
index 000000000000..28ca77cc876c
--- /dev/null
+++ b/tools/testing/selftests/rseq/rseq-x86-bits.h
@@ -0,0 +1,993 @@
+/* SPDX-License-Identifier: LGPL-2.1 OR MIT */
+/*
+ * rseq-x86-bits.h
+ *
+ * (C) Copyright 2016-2022 - Mathieu Desnoyers <mathieu.desnoyers@xxxxxxxxxxxx>
+ */
+
+#include "rseq-bits-template.h"
+
+#ifdef __x86_64__
+
+#if defined(RSEQ_TEMPLATE_MO_RELAXED) && \
+ (defined(RSEQ_TEMPLATE_CPU_ID) || defined(RSEQ_TEMPLATE_VM_VCPU_ID))
+
+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_VM_VCPU_ID)) */
+
+#if (defined(RSEQ_TEMPLATE_MO_RELAXED) || defined(RSEQ_TEMPLATE_MO_RELEASE)) && \
+ (defined(RSEQ_TEMPLATE_CPU_ID) || defined(RSEQ_TEMPLATE_VM_VCPU_ID))
+
+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_VM_VCPU_ID)) */
+
+#elif defined(__i386__)
+
+#if defined(RSEQ_TEMPLATE_MO_RELAXED) && \
+ (defined(RSEQ_TEMPLATE_CPU_ID) || defined(RSEQ_TEMPLATE_VM_VCPU_ID))
+
+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_VM_VCPU_ID)) */
+
+#if (defined(RSEQ_TEMPLATE_MO_RELAXED) || defined(RSEQ_TEMPLATE_MO_RELEASE)) && \
+ (defined(RSEQ_TEMPLATE_CPU_ID) || defined(RSEQ_TEMPLATE_VM_VCPU_ID))
+
+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_VM_VCPU_ID)) */
+
+#endif
+
+#include "rseq-bits-reset.h"
diff --git a/tools/testing/selftests/rseq/rseq-x86.h b/tools/testing/selftests/rseq/rseq-x86.h
index e148dfb2f68a..a526a6ad3a81 100644
--- a/tools/testing/selftests/rseq/rseq-x86.h
+++ b/tools/testing/selftests/rseq/rseq-x86.h
@@ -2,9 +2,13 @@
/*
* rseq-x86.h
*
- * (C) Copyright 2016-2018 - Mathieu Desnoyers <mathieu.desnoyers@xxxxxxxxxxxx>
+ * (C) Copyright 2016-2022 - Mathieu Desnoyers <mathieu.desnoyers@xxxxxxxxxxxx>
*/
+#ifndef RSEQ_H
+#error "Never use <rseq-x86.h> directly; include <rseq.h> instead."
+#endif
+
#include <stdint.h>
/*
@@ -22,9 +26,10 @@
* address through a "r" input operand.
*/
-/* Offset of cpu_id and rseq_cs fields in struct rseq. */
+/* Offset of cpu_id, rseq_cs, and vm_vcpu_id fields in struct rseq. */
#define RSEQ_CPU_ID_OFFSET 4
#define RSEQ_CS_OFFSET 8
+#define RSEQ_VM_VCPU_ID_OFFSET 24
#ifdef __x86_64__
@@ -108,523 +113,6 @@ do { \
"jmp %l[" __rseq_str(cmpfail_label) "]\n\t" \
".popsection\n\t"
-static inline __attribute__((always_inline))
-int rseq_cmpeqv_storev(intptr_t *v, intptr_t expect, intptr_t newv, int cpu)
-{
- RSEQ_INJECT_C(9)
-
- __asm__ __volatile__ goto (
- RSEQ_ASM_DEFINE_TABLE(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_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_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_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_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_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_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_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_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_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_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_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_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_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_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
-}
-
-/* x86-64 is TSO. */
-static inline __attribute__((always_inline))
-int rseq_cmpeqv_trystorev_storev_release(intptr_t *v, intptr_t expect,
- intptr_t *v2, intptr_t newv2,
- intptr_t newv, int cpu)
-{
- return rseq_cmpeqv_trystorev_storev(v, expect, v2, newv2, newv, cpu);
-}
-
-static inline __attribute__((always_inline))
-int rseq_cmpeqv_cmpeqv_storev(intptr_t *v, intptr_t expect,
- intptr_t *v2, intptr_t expect2,
- intptr_t newv, int cpu)
-{
- RSEQ_INJECT_C(9)
-
- __asm__ __volatile__ goto (
- RSEQ_ASM_DEFINE_TABLE(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_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_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
-}
-
-static inline __attribute__((always_inline))
-int rseq_cmpeqv_trymemcpy_storev(intptr_t *v, intptr_t expect,
- void *dst, void *src, size_t len,
- intptr_t newv, int cpu)
-{
- 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_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_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
-}
-
-/* x86-64 is TSO. */
-static inline __attribute__((always_inline))
-int rseq_cmpeqv_trymemcpy_storev_release(intptr_t *v, intptr_t expect,
- void *dst, void *src, size_t len,
- intptr_t newv, int cpu)
-{
- return rseq_cmpeqv_trymemcpy_storev(v, expect, dst, src, len,
- newv, cpu);
-}
-
#elif defined(__i386__)
#define RSEQ_ASM_TP_SEGMENT %%gs
@@ -711,643 +199,36 @@ do { \
"jmp %l[" __rseq_str(cmpfail_label) "]\n\t" \
".popsection\n\t"
-static inline __attribute__((always_inline))
-int rseq_cmpeqv_storev(intptr_t *v, intptr_t expect, intptr_t newv, int cpu)
-{
- RSEQ_INJECT_C(9)
-
- __asm__ __volatile__ goto (
- RSEQ_ASM_DEFINE_TABLE(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_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_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_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_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_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_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_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_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_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_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_CPU_ID_OFFSET(%[rseq_offset]), %l[error1])
- "cmpl %[v], %[expect]\n\t"
- "jnz %l[error2]\n\t"
-#endif
- /* try store */
- "movl %[newv2], %%eax\n\t"
- "movl %%eax, %[v2]\n\t"
- RSEQ_INJECT_ASM(5)
- /* 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] "m" (newv2),
- /* final store input */
- [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
-}
-
-static inline __attribute__((always_inline))
-int rseq_cmpeqv_trystorev_storev_release(intptr_t *v, intptr_t expect,
- intptr_t *v2, intptr_t newv2,
- intptr_t newv, int cpu)
-{
- RSEQ_INJECT_C(9)
-
- __asm__ __volatile__ goto (
- RSEQ_ASM_DEFINE_TABLE(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_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_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)
- "lock; addl $0,-128(%%esp)\n\t"
- /* 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
-}
+/* Per-cpu-id indexing. */
-static inline __attribute__((always_inline))
-int rseq_cmpeqv_cmpeqv_storev(intptr_t *v, intptr_t expect,
- intptr_t *v2, intptr_t expect2,
- intptr_t newv, int cpu)
-{
- RSEQ_INJECT_C(9)
+#define RSEQ_TEMPLATE_CPU_ID
+#define RSEQ_TEMPLATE_MO_RELAXED
+#include "rseq-x86-bits.h"
+#undef RSEQ_TEMPLATE_MO_RELAXED
- __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_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_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
-}
+#define RSEQ_TEMPLATE_MO_RELEASE
+#include "rseq-x86-bits.h"
+#undef RSEQ_TEMPLATE_MO_RELEASE
+#undef RSEQ_TEMPLATE_CPU_ID
-/* TODO: implement a faster memcpy. */
-static inline __attribute__((always_inline))
-int rseq_cmpeqv_trymemcpy_storev(intptr_t *v, intptr_t expect,
- void *dst, void *src, size_t len,
- intptr_t newv, int cpu)
-{
- uint32_t rseq_scratch[3];
+/* Per-vm-vcpu-id indexing. */
- RSEQ_INJECT_C(9)
+#define RSEQ_TEMPLATE_VM_VCPU_ID
+#define RSEQ_TEMPLATE_MO_RELAXED
+#include "rseq-x86-bits.h"
+#undef RSEQ_TEMPLATE_MO_RELAXED
- __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_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_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)
- "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
-}
-
-/* TODO: implement a faster memcpy. */
-static inline __attribute__((always_inline))
-int rseq_cmpeqv_trymemcpy_storev_release(intptr_t *v, intptr_t expect,
- void *dst, void *src, size_t len,
- intptr_t newv, int cpu)
-{
- uint32_t rseq_scratch[3];
-
- RSEQ_INJECT_C(9)
+#define RSEQ_TEMPLATE_MO_RELEASE
+#include "rseq-x86-bits.h"
+#undef RSEQ_TEMPLATE_MO_RELEASE
+#undef RSEQ_TEMPLATE_VM_VCPU_ID
- __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_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_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)
- "lock; addl $0,-128(%%esp)\n\t"
- "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
-}
+/* APIs which are not based on cpu ids. */
-#endif
+#define RSEQ_TEMPLATE_CPU_ID_NONE
+#define RSEQ_TEMPLATE_MO_RELAXED
+#include "rseq-x86-bits.h"
+#undef RSEQ_TEMPLATE_MO_RELAXED
+#undef RSEQ_TEMPLATE_CPU_ID_NONE
diff --git a/tools/testing/selftests/rseq/rseq.h b/tools/testing/selftests/rseq/rseq.h
index 003e0e3750ce..95a76a1c3b27 100644
--- a/tools/testing/selftests/rseq/rseq.h
+++ b/tools/testing/selftests/rseq/rseq.h
@@ -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_VM_VCPU_ID = 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_VM_VCPU_ID:
+ return rseq_cmpeqv_storev_relaxed_vm_vcpu_id(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_VM_VCPU_ID:
+ return rseq_cmpnev_storeoffp_load_relaxed_vm_vcpu_id(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_VM_VCPU_ID:
+ return rseq_addv_relaxed_vm_vcpu_id(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_VM_VCPU_ID:
+ return rseq_offset_deref_addv_relaxed_vm_vcpu_id(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_VM_VCPU_ID:
+ return rseq_cmpeqv_trystorev_storev_relaxed_vm_vcpu_id(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_VM_VCPU_ID:
+ return rseq_cmpeqv_trystorev_storev_release_vm_vcpu_id(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_VM_VCPU_ID:
+ return rseq_cmpeqv_cmpeqv_storev_relaxed_vm_vcpu_id(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_VM_VCPU_ID:
+ return rseq_cmpeqv_trymemcpy_storev_relaxed_vm_vcpu_id(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_VM_VCPU_ID:
+ return rseq_cmpeqv_trymemcpy_storev_release_vm_vcpu_id(v, expect, dst, src, len, newv, cpu);
+ }
+ return -1;
+ default:
+ return -1;
+ }
+}
+
#endif /* RSEQ_H_ */
--
2.25.1