From 61598093bbdd283a7edc367d900f223070ead8d2 Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Fri, 10 May 2024 07:43:03 +0000
Subject: [PATCH] add ax88772C AX88772C_eeprom_tools
---
kernel/kernel/trace/trace_syscalls.c | 98 +++++++++++++++++++++++++++---------------------
1 files changed, 55 insertions(+), 43 deletions(-)
diff --git a/kernel/kernel/trace/trace_syscalls.c b/kernel/kernel/trace/trace_syscalls.c
index f93a56d..d85a2f0 100644
--- a/kernel/kernel/trace/trace_syscalls.c
+++ b/kernel/kernel/trace/trace_syscalls.c
@@ -7,6 +7,7 @@
#include <linux/module.h> /* for MODULE_NAME_LEN via KSYM_SYMBOL_LEN */
#include <linux/ftrace.h>
#include <linux/perf_event.h>
+#include <linux/xarray.h>
#include <asm/syscall.h>
#include "trace_output.h"
@@ -30,6 +31,7 @@
extern struct syscall_metadata *__start_syscalls_metadata[];
extern struct syscall_metadata *__stop_syscalls_metadata[];
+static DEFINE_XARRAY(syscalls_metadata_sparse);
static struct syscall_metadata **syscalls_metadata;
#ifndef ARCH_HAS_SYSCALL_MATCH_SYM_NAME
@@ -101,6 +103,9 @@
static struct syscall_metadata *syscall_nr_to_meta(int nr)
{
+ if (IS_ENABLED(CONFIG_HAVE_SPARSE_SYSCALL_NR))
+ return xa_load(&syscalls_metadata_sparse, (unsigned long)nr);
+
if (!syscalls_metadata || nr >= NR_syscalls || nr < 0)
return NULL;
@@ -198,11 +203,10 @@
extern char *__bad_type_size(void);
-#define SYSCALL_FIELD(type, field, name) \
- sizeof(type) != sizeof(trace.field) ? \
- __bad_type_size() : \
- #type, #name, offsetof(typeof(trace), field), \
- sizeof(trace.field), is_signed_type(type)
+#define SYSCALL_FIELD(_type, _name) { \
+ .type = #_type, .name = #_name, \
+ .size = sizeof(_type), .align = __alignof__(_type), \
+ .is_signed = is_signed_type(_type), .filter_type = FILTER_OTHER }
static int __init
__set_enter_print_fmt(struct syscall_metadata *entry, char *buf, int len)
@@ -269,38 +273,19 @@
{
struct syscall_trace_enter trace;
struct syscall_metadata *meta = call->data;
- int ret;
- int i;
int offset = offsetof(typeof(trace), args);
-
- ret = trace_define_field(call, SYSCALL_FIELD(int, nr, __syscall_nr),
- FILTER_OTHER);
- if (ret)
- return ret;
+ int ret = 0;
+ int i;
for (i = 0; i < meta->nb_args; i++) {
ret = trace_define_field(call, meta->types[i],
meta->args[i], offset,
sizeof(unsigned long), 0,
FILTER_OTHER);
+ if (ret)
+ break;
offset += sizeof(unsigned long);
}
-
- return ret;
-}
-
-static int __init syscall_exit_define_fields(struct trace_event_call *call)
-{
- struct syscall_trace_exit trace;
- int ret;
-
- ret = trace_define_field(call, SYSCALL_FIELD(int, nr, __syscall_nr),
- FILTER_OTHER);
- if (ret)
- return ret;
-
- ret = trace_define_field(call, SYSCALL_FIELD(long, ret, ret),
- FILTER_OTHER);
return ret;
}
@@ -312,8 +297,9 @@
struct syscall_trace_enter *entry;
struct syscall_metadata *sys_data;
struct ring_buffer_event *event;
- struct ring_buffer *buffer;
+ struct trace_buffer *buffer;
unsigned long irq_flags;
+ unsigned long args[6];
int pc;
int syscall_nr;
int size;
@@ -339,7 +325,7 @@
local_save_flags(irq_flags);
pc = preempt_count();
- buffer = tr->trace_buffer.buffer;
+ buffer = tr->array_buffer.buffer;
event = trace_buffer_lock_reserve(buffer,
sys_data->enter_event->event.type, size, irq_flags, pc);
if (!event)
@@ -347,7 +333,8 @@
entry = ring_buffer_event_data(event);
entry->nr = syscall_nr;
- syscall_get_arguments(current, regs, 0, sys_data->nb_args, entry->args);
+ syscall_get_arguments(current, regs, args);
+ memcpy(entry->args, args, sizeof(unsigned long) * sys_data->nb_args);
event_trigger_unlock_commit(trace_file, buffer, event, entry,
irq_flags, pc);
@@ -360,7 +347,7 @@
struct syscall_trace_exit *entry;
struct syscall_metadata *sys_data;
struct ring_buffer_event *event;
- struct ring_buffer *buffer;
+ struct trace_buffer *buffer;
unsigned long irq_flags;
int pc;
int syscall_nr;
@@ -384,7 +371,7 @@
local_save_flags(irq_flags);
pc = preempt_count();
- buffer = tr->trace_buffer.buffer;
+ buffer = tr->array_buffer.buffer;
event = trace_buffer_lock_reserve(buffer,
sys_data->exit_event->event.type, sizeof(*entry),
irq_flags, pc);
@@ -500,6 +487,13 @@
return id;
}
+static struct trace_event_fields __refdata syscall_enter_fields_array[] = {
+ SYSCALL_FIELD(int, __syscall_nr),
+ { .type = TRACE_FUNCTION_TYPE,
+ .define_fields = syscall_enter_define_fields },
+ {}
+};
+
struct trace_event_functions enter_syscall_print_funcs = {
.trace = print_syscall_enter,
};
@@ -511,7 +505,7 @@
struct trace_event_class __refdata event_class_syscall_enter = {
.system = "syscalls",
.reg = syscall_enter_register,
- .define_fields = syscall_enter_define_fields,
+ .fields_array = syscall_enter_fields_array,
.get_fields = syscall_get_enter_fields,
.raw_init = init_syscall_trace,
};
@@ -519,7 +513,11 @@
struct trace_event_class __refdata event_class_syscall_exit = {
.system = "syscalls",
.reg = syscall_exit_register,
- .define_fields = syscall_exit_define_fields,
+ .fields_array = (struct trace_event_fields[]){
+ SYSCALL_FIELD(int, __syscall_nr),
+ SYSCALL_FIELD(long, ret),
+ {}
+ },
.fields = LIST_HEAD_INIT(event_class_syscall_exit.fields),
.raw_init = init_syscall_trace,
};
@@ -534,12 +532,16 @@
struct syscall_metadata *meta;
unsigned long addr;
int i;
+ void *ret;
- syscalls_metadata = kcalloc(NR_syscalls, sizeof(*syscalls_metadata),
- GFP_KERNEL);
- if (!syscalls_metadata) {
- WARN_ON(1);
- return;
+ if (!IS_ENABLED(CONFIG_HAVE_SPARSE_SYSCALL_NR)) {
+ syscalls_metadata = kcalloc(NR_syscalls,
+ sizeof(*syscalls_metadata),
+ GFP_KERNEL);
+ if (!syscalls_metadata) {
+ WARN_ON(1);
+ return;
+ }
}
for (i = 0; i < NR_syscalls; i++) {
@@ -549,7 +551,16 @@
continue;
meta->syscall_nr = i;
- syscalls_metadata[i] = meta;
+
+ if (!IS_ENABLED(CONFIG_HAVE_SPARSE_SYSCALL_NR)) {
+ syscalls_metadata[i] = meta;
+ } else {
+ ret = xa_store(&syscalls_metadata_sparse, i, meta,
+ GFP_KERNEL);
+ WARN(xa_is_err(ret),
+ "Syscall memory allocation failed\n");
+ }
+
}
}
@@ -583,6 +594,7 @@
struct syscall_metadata *sys_data;
struct syscall_trace_enter *rec;
struct hlist_head *head;
+ unsigned long args[6];
bool valid_prog_array;
int syscall_nr;
int rctx;
@@ -613,8 +625,8 @@
return;
rec->nr = syscall_nr;
- syscall_get_arguments(current, regs, 0, sys_data->nb_args,
- (unsigned long *)&rec->args);
+ syscall_get_arguments(current, regs, args);
+ memcpy(&rec->args, args, sizeof(unsigned long) * sys_data->nb_args);
if ((valid_prog_array &&
!perf_call_bpf_enter(sys_data->enter_event, regs, sys_data, rec)) ||
--
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