From 8ac6c7a54ed1b98d142dce24b11c6de6a1e239a5 Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Tue, 22 Oct 2024 10:36:11 +0000
Subject: [PATCH] 修改4g拨号为QMI,需要在系统里后台执行quectel-CM
---
kernel/tools/testing/selftests/rseq/rseq-arm.h | 245 +++++++++++++++++++++++++++++++++++-------------
1 files changed, 178 insertions(+), 67 deletions(-)
diff --git a/kernel/tools/testing/selftests/rseq/rseq-arm.h b/kernel/tools/testing/selftests/rseq/rseq-arm.h
index 3cea198..893a11e 100644
--- a/kernel/tools/testing/selftests/rseq/rseq-arm.h
+++ b/kernel/tools/testing/selftests/rseq/rseq-arm.h
@@ -5,7 +5,60 @@
* (C) Copyright 2016-2018 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
*/
-#define RSEQ_SIG 0x53053053
+/*
+ * - ARM little endian
+ *
+ * RSEQ_SIG uses the udf A32 instruction with an uncommon immediate operand
+ * value 0x5de3. This traps if user-space reaches this instruction by mistake,
+ * and the uncommon operand ensures the kernel does not move the instruction
+ * pointer to attacker-controlled code on rseq abort.
+ *
+ * The instruction pattern in the A32 instruction set is:
+ *
+ * e7f5def3 udf #24035 ; 0x5de3
+ *
+ * This translates to the following instruction pattern in the T16 instruction
+ * set:
+ *
+ * little endian:
+ * def3 udf #243 ; 0xf3
+ * e7f5 b.n <7f5>
+ *
+ * - ARMv6+ big endian (BE8):
+ *
+ * ARMv6+ -mbig-endian generates mixed endianness code vs data: little-endian
+ * code and big-endian data. The data value of the signature needs to have its
+ * byte order reversed to generate the trap instruction:
+ *
+ * Data: 0xf3def5e7
+ *
+ * Translates to this A32 instruction pattern:
+ *
+ * e7f5def3 udf #24035 ; 0x5de3
+ *
+ * Translates to this T16 instruction pattern:
+ *
+ * def3 udf #243 ; 0xf3
+ * e7f5 b.n <7f5>
+ *
+ * - Prior to ARMv6 big endian (BE32):
+ *
+ * Prior to ARMv6, -mbig-endian generates big-endian code and data
+ * (which match), so the endianness of the data representation of the
+ * signature should not be reversed. However, the choice between BE32
+ * and BE8 is done by the linker, so we cannot know whether code and
+ * data endianness will be mixed before the linker is invoked. So rather
+ * than try to play tricks with the linker, the rseq signature is simply
+ * data (not a trap instruction) prior to ARMv6 on big endian. This is
+ * why the signature is expressed as data (.word) rather than as
+ * instruction (.inst) in assembler.
+ */
+
+#ifdef __ARMEB__
+#define RSEQ_SIG 0xf3def5e7 /* udf #24035 ; 0x5de3 (ARMv6+) */
+#else
+#define RSEQ_SIG 0xe7f5def3 /* udf #24035 ; 0x5de3 */
+#endif
#define rseq_smp_mb() __asm__ __volatile__ ("dmb" ::: "memory", "cc")
#define rseq_smp_rmb() __asm__ __volatile__ ("dmb" ::: "memory", "cc")
@@ -30,17 +83,34 @@
#include "rseq-skip.h"
#else /* !RSEQ_SKIP_FASTPATH */
-#define __RSEQ_ASM_DEFINE_TABLE(version, flags, start_ip, \
+#define __RSEQ_ASM_DEFINE_TABLE(label, version, flags, start_ip, \
post_commit_offset, abort_ip) \
- ".pushsection __rseq_table, \"aw\"\n\t" \
+ ".pushsection __rseq_cs, \"aw\"\n\t" \
".balign 32\n\t" \
+ __rseq_str(label) ":\n\t" \
".word " __rseq_str(version) ", " __rseq_str(flags) "\n\t" \
".word " __rseq_str(start_ip) ", 0x0, " __rseq_str(post_commit_offset) ", 0x0, " __rseq_str(abort_ip) ", 0x0\n\t" \
+ ".popsection\n\t" \
+ ".pushsection __rseq_cs_ptr_array, \"aw\"\n\t" \
+ ".word " __rseq_str(label) "b, 0x0\n\t" \
".popsection\n\t"
-#define RSEQ_ASM_DEFINE_TABLE(start_ip, post_commit_ip, abort_ip) \
- __RSEQ_ASM_DEFINE_TABLE(0x0, 0x0, start_ip, \
+#define RSEQ_ASM_DEFINE_TABLE(label, start_ip, post_commit_ip, abort_ip) \
+ __RSEQ_ASM_DEFINE_TABLE(label, 0x0, 0x0, start_ip, \
(post_commit_ip - start_ip), abort_ip)
+
+/*
+ * Exit points of a rseq critical section consist of all instructions outside
+ * of the critical section where a critical section can either branch to or
+ * reach through the normal course of its execution. The abort IP and the
+ * post-commit IP are already part of the __rseq_cs section and should not be
+ * explicitly defined as additional exit points. Knowing all exit points is
+ * useful to assist debuggers stepping over the critical section.
+ */
+#define RSEQ_ASM_DEFINE_EXIT_POINT(start_ip, exit_ip) \
+ ".pushsection __rseq_exit_point_array, \"aw\"\n\t" \
+ ".word " __rseq_str(start_ip) ", 0x0, " __rseq_str(exit_ip) ", 0x0\n\t" \
+ ".popsection\n\t"
#define RSEQ_ASM_STORE_RSEQ_CS(label, cs_label, rseq_cs) \
RSEQ_INJECT_ASM(1) \
@@ -77,16 +147,18 @@
teardown \
"b %l[" __rseq_str(cmpfail_label) "]\n\t"
-#define rseq_workaround_gcc_asm_size_guess() __asm__ __volatile__("")
-
static inline __attribute__((always_inline))
int rseq_cmpeqv_storev(intptr_t *v, intptr_t expect, intptr_t newv, int cpu)
{
RSEQ_INJECT_C(9)
- rseq_workaround_gcc_asm_size_guess();
__asm__ __volatile__ goto (
- RSEQ_ASM_DEFINE_TABLE(1f, 2f, 4f) /* start, commit, abort */
+ RSEQ_ASM_DEFINE_TABLE(9, 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, 3f, rseq_cs)
RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, 4f)
@@ -110,8 +182,8 @@
"5:\n\t"
: /* gcc asm goto does not allow outputs */
: [cpu_id] "r" (cpu),
- [current_cpu_id] "m" (__rseq_abi.cpu_id),
- [rseq_cs] "m" (__rseq_abi.rseq_cs),
+ [current_cpu_id] "m" (rseq_get_abi()->cpu_id),
+ [rseq_cs] "m" (rseq_get_abi()->rseq_cs.arch.ptr),
[v] "m" (*v),
[expect] "r" (expect),
[newv] "r" (newv)
@@ -123,32 +195,38 @@
, error1, error2
#endif
);
- rseq_workaround_gcc_asm_size_guess();
+ rseq_after_asm_goto();
return 0;
abort:
- rseq_workaround_gcc_asm_size_guess();
+ rseq_after_asm_goto();
RSEQ_INJECT_FAILED
return -1;
cmpfail:
- rseq_workaround_gcc_asm_size_guess();
+ 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_cmpnev_storeoffp_load(intptr_t *v, intptr_t expectnot,
- off_t voffp, intptr_t *load, int cpu)
+ long voffp, intptr_t *load, int cpu)
{
RSEQ_INJECT_C(9)
- rseq_workaround_gcc_asm_size_guess();
__asm__ __volatile__ goto (
- RSEQ_ASM_DEFINE_TABLE(1f, 2f, 4f) /* start, commit, abort */
+ RSEQ_ASM_DEFINE_TABLE(9, 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, 3f, rseq_cs)
RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, 4f)
@@ -175,8 +253,8 @@
"5:\n\t"
: /* gcc asm goto does not allow outputs */
: [cpu_id] "r" (cpu),
- [current_cpu_id] "m" (__rseq_abi.cpu_id),
- [rseq_cs] "m" (__rseq_abi.rseq_cs),
+ [current_cpu_id] "m" (rseq_get_abi()->cpu_id),
+ [rseq_cs] "m" (rseq_get_abi()->rseq_cs.arch.ptr),
/* final store input */
[v] "m" (*v),
[expectnot] "r" (expectnot),
@@ -190,19 +268,21 @@
, error1, error2
#endif
);
- rseq_workaround_gcc_asm_size_guess();
+ rseq_after_asm_goto();
return 0;
abort:
- rseq_workaround_gcc_asm_size_guess();
+ rseq_after_asm_goto();
RSEQ_INJECT_FAILED
return -1;
cmpfail:
- rseq_workaround_gcc_asm_size_guess();
+ 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
}
@@ -212,9 +292,11 @@
{
RSEQ_INJECT_C(9)
- rseq_workaround_gcc_asm_size_guess();
__asm__ __volatile__ goto (
- RSEQ_ASM_DEFINE_TABLE(1f, 2f, 4f) /* start, commit, abort */
+ RSEQ_ASM_DEFINE_TABLE(9, 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, 3f, rseq_cs)
RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, 4f)
@@ -233,8 +315,8 @@
"5:\n\t"
: /* gcc asm goto does not allow outputs */
: [cpu_id] "r" (cpu),
- [current_cpu_id] "m" (__rseq_abi.cpu_id),
- [rseq_cs] "m" (__rseq_abi.rseq_cs),
+ [current_cpu_id] "m" (rseq_get_abi()->cpu_id),
+ [rseq_cs] "m" (rseq_get_abi()->rseq_cs.arch.ptr),
[v] "m" (*v),
[count] "Ir" (count)
RSEQ_INJECT_INPUT
@@ -245,14 +327,15 @@
, error1
#endif
);
- rseq_workaround_gcc_asm_size_guess();
+ rseq_after_asm_goto();
return 0;
abort:
- rseq_workaround_gcc_asm_size_guess();
+ 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
}
@@ -264,9 +347,13 @@
{
RSEQ_INJECT_C(9)
- rseq_workaround_gcc_asm_size_guess();
__asm__ __volatile__ goto (
- RSEQ_ASM_DEFINE_TABLE(1f, 2f, 4f) /* start, commit, abort */
+ RSEQ_ASM_DEFINE_TABLE(9, 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, 3f, rseq_cs)
RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, 4f)
@@ -293,8 +380,8 @@
"5:\n\t"
: /* gcc asm goto does not allow outputs */
: [cpu_id] "r" (cpu),
- [current_cpu_id] "m" (__rseq_abi.cpu_id),
- [rseq_cs] "m" (__rseq_abi.rseq_cs),
+ [current_cpu_id] "m" (rseq_get_abi()->cpu_id),
+ [rseq_cs] "m" (rseq_get_abi()->rseq_cs.arch.ptr),
/* try store input */
[v2] "m" (*v2),
[newv2] "r" (newv2),
@@ -310,19 +397,21 @@
, error1, error2
#endif
);
- rseq_workaround_gcc_asm_size_guess();
+ rseq_after_asm_goto();
return 0;
abort:
- rseq_workaround_gcc_asm_size_guess();
+ rseq_after_asm_goto();
RSEQ_INJECT_FAILED
return -1;
cmpfail:
- rseq_workaround_gcc_asm_size_guess();
+ 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
}
@@ -334,9 +423,13 @@
{
RSEQ_INJECT_C(9)
- rseq_workaround_gcc_asm_size_guess();
__asm__ __volatile__ goto (
- RSEQ_ASM_DEFINE_TABLE(1f, 2f, 4f) /* start, commit, abort */
+ RSEQ_ASM_DEFINE_TABLE(9, 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, 3f, rseq_cs)
RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, 4f)
@@ -364,8 +457,8 @@
"5:\n\t"
: /* gcc asm goto does not allow outputs */
: [cpu_id] "r" (cpu),
- [current_cpu_id] "m" (__rseq_abi.cpu_id),
- [rseq_cs] "m" (__rseq_abi.rseq_cs),
+ [current_cpu_id] "m" (rseq_get_abi()->cpu_id),
+ [rseq_cs] "m" (rseq_get_abi()->rseq_cs.arch.ptr),
/* try store input */
[v2] "m" (*v2),
[newv2] "r" (newv2),
@@ -381,19 +474,21 @@
, error1, error2
#endif
);
- rseq_workaround_gcc_asm_size_guess();
+ rseq_after_asm_goto();
return 0;
abort:
- rseq_workaround_gcc_asm_size_guess();
+ rseq_after_asm_goto();
RSEQ_INJECT_FAILED
return -1;
cmpfail:
- rseq_workaround_gcc_asm_size_guess();
+ 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
}
@@ -405,9 +500,14 @@
{
RSEQ_INJECT_C(9)
- rseq_workaround_gcc_asm_size_guess();
__asm__ __volatile__ goto (
- RSEQ_ASM_DEFINE_TABLE(1f, 2f, 4f) /* start, commit, abort */
+ RSEQ_ASM_DEFINE_TABLE(9, 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, 3f, rseq_cs)
RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, 4f)
@@ -438,8 +538,8 @@
"5:\n\t"
: /* gcc asm goto does not allow outputs */
: [cpu_id] "r" (cpu),
- [current_cpu_id] "m" (__rseq_abi.cpu_id),
- [rseq_cs] "m" (__rseq_abi.rseq_cs),
+ [current_cpu_id] "m" (rseq_get_abi()->cpu_id),
+ [rseq_cs] "m" (rseq_get_abi()->rseq_cs.arch.ptr),
/* cmp2 input */
[v2] "m" (*v2),
[expect2] "r" (expect2),
@@ -455,21 +555,24 @@
, error1, error2, error3
#endif
);
- rseq_workaround_gcc_asm_size_guess();
+ rseq_after_asm_goto();
return 0;
abort:
- rseq_workaround_gcc_asm_size_guess();
+ rseq_after_asm_goto();
RSEQ_INJECT_FAILED
return -1;
cmpfail:
- rseq_workaround_gcc_asm_size_guess();
+ 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
}
@@ -483,9 +586,13 @@
RSEQ_INJECT_C(9)
- rseq_workaround_gcc_asm_size_guess();
__asm__ __volatile__ goto (
- RSEQ_ASM_DEFINE_TABLE(1f, 2f, 4f) /* start, commit, abort */
+ RSEQ_ASM_DEFINE_TABLE(9, 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
"str %[src], %[rseq_scratch0]\n\t"
"str %[dst], %[rseq_scratch1]\n\t"
"str %[len], %[rseq_scratch2]\n\t"
@@ -553,8 +660,8 @@
"8:\n\t"
: /* gcc asm goto does not allow outputs */
: [cpu_id] "r" (cpu),
- [current_cpu_id] "m" (__rseq_abi.cpu_id),
- [rseq_cs] "m" (__rseq_abi.rseq_cs),
+ [current_cpu_id] "m" (rseq_get_abi()->cpu_id),
+ [rseq_cs] "m" (rseq_get_abi()->rseq_cs.arch.ptr),
/* final store input */
[v] "m" (*v),
[expect] "r" (expect),
@@ -574,21 +681,21 @@
, error1, error2
#endif
);
- rseq_workaround_gcc_asm_size_guess();
+ rseq_after_asm_goto();
return 0;
abort:
- rseq_workaround_gcc_asm_size_guess();
+ rseq_after_asm_goto();
RSEQ_INJECT_FAILED
return -1;
cmpfail:
- rseq_workaround_gcc_asm_size_guess();
+ rseq_after_asm_goto();
return 1;
#ifdef RSEQ_COMPARE_TWICE
error1:
- rseq_workaround_gcc_asm_size_guess();
+ rseq_after_asm_goto();
rseq_bug("cpu_id comparison failed");
error2:
- rseq_workaround_gcc_asm_size_guess();
+ rseq_after_asm_goto();
rseq_bug("expected value comparison failed");
#endif
}
@@ -602,9 +709,13 @@
RSEQ_INJECT_C(9)
- rseq_workaround_gcc_asm_size_guess();
__asm__ __volatile__ goto (
- RSEQ_ASM_DEFINE_TABLE(1f, 2f, 4f) /* start, commit, abort */
+ RSEQ_ASM_DEFINE_TABLE(9, 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
"str %[src], %[rseq_scratch0]\n\t"
"str %[dst], %[rseq_scratch1]\n\t"
"str %[len], %[rseq_scratch2]\n\t"
@@ -673,8 +784,8 @@
"8:\n\t"
: /* gcc asm goto does not allow outputs */
: [cpu_id] "r" (cpu),
- [current_cpu_id] "m" (__rseq_abi.cpu_id),
- [rseq_cs] "m" (__rseq_abi.rseq_cs),
+ [current_cpu_id] "m" (rseq_get_abi()->cpu_id),
+ [rseq_cs] "m" (rseq_get_abi()->rseq_cs.arch.ptr),
/* final store input */
[v] "m" (*v),
[expect] "r" (expect),
@@ -694,21 +805,21 @@
, error1, error2
#endif
);
- rseq_workaround_gcc_asm_size_guess();
+ rseq_after_asm_goto();
return 0;
abort:
- rseq_workaround_gcc_asm_size_guess();
+ rseq_after_asm_goto();
RSEQ_INJECT_FAILED
return -1;
cmpfail:
- rseq_workaround_gcc_asm_size_guess();
+ rseq_after_asm_goto();
return 1;
#ifdef RSEQ_COMPARE_TWICE
error1:
- rseq_workaround_gcc_asm_size_guess();
+ rseq_after_asm_goto();
rseq_bug("cpu_id comparison failed");
error2:
- rseq_workaround_gcc_asm_size_guess();
+ rseq_after_asm_goto();
rseq_bug("expected value comparison failed");
#endif
}
--
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