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Code Issues Releases Wiki Activity

use demangled names (#375)

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there is no change for c symbols
  rust symbols name will be more readable
This commit is contained in:
zhaoyao73 2023-09-13 01:49:03 -04:00 committed by GitHub
parent 22c9db312a
commit 9029414af2
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2 changed files with 21 additions and 15 deletions
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4
kernel/src/debug/Makefile
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@ -5,7 +5,7 @@ CFLAGS += -I .
# 请注意，这个不能使用raw的gcc来编译。
kallsyms.o: kallsyms.c
gcc -o kallsyms kallsyms.c
gcc -o kallsyms kallsyms.c
rm -rf kallsyms.o
traceback.o: traceback/traceback.c
@ -16,7 +16,7 @@ traceback.o: traceback/traceback.c
generate_kallsyms: kallsyms.o
echo "Generating kallsyms..."
# 请注意，这个不能使用raw的nm来处理
nm -n $(kernel_root_path)/kernel | ./kallsyms > kallsyms.S
nm -n -C $(kernel_root_path)/kernel | ./kallsyms > kallsyms.S
$(CC) -c kallsyms.S -o kallsyms.o
@echo "Kallsyms generated."

32
kernel/src/debug/kallsyms.c
View File

@ -51,22 +51,26 @@ int read_symbol(FILE *filp, struct kernel_symbol_entry_t *entry)
{
// 本函数假设nm命令输出的结果中，每行最大512字节
char str[512] = {0};
int retval = fscanf(filp, "%llx %c %510s\n", &entry->vaddr, &entry->type, str);
char* s = fgets(str, sizeof(str), filp);
if (s != str) {
return -1;
}
char symbol_name[512] = {0};
int retval = sscanf(str, "%llx %c %512c", &entry->vaddr, &entry->type, symbol_name);
// 如果当前行不符合要求
if (retval != 3)
{
if (retval != EOF)
{
// 如果不是输入流的结尾，说明该行不符合要求，将其过滤
fgets(str, 512, filp);
}
if (retval != 3) {
return -1;
}
// malloc一块内存，然后把str的内容拷贝进去，接着修改symbol指针
entry->symbol = strdup(str);
entry->symbol_length = strlen(str) + 1; // +1的原因是.asciz指令会在字符串末尾自动添加结束符\0
size_t len = strlen(symbol_name);
if (len >= 1 && symbol_name[len - 1] == '\n') {
symbol_name[len - 1] = '\0';
len--;
}
entry->symbol = strdup(symbol_name);
entry->symbol_length = len + 1; // +1的原因是.asciz指令会在字符串末尾自动添加结束符\0
return 0;
}
@ -96,10 +100,12 @@ void read_map(FILE *filp)
// 查找符号表中的text和etext标签
for (uint64_t i = 0; i < entry_count; ++i)
{
if (strcmp(symbol_table[i].symbol, "_text")==0)
if (text_vaddr == 0ULL && strcmp(symbol_table[i].symbol, "_text") == 0)
text_vaddr = symbol_table[i].vaddr;
if (strcmp(symbol_table[i].symbol, "_etext")==0)
if (etext_vaddr == 0ULL && strcmp(symbol_table[i].symbol, "_etext") == 0)
etext_vaddr = symbol_table[i].vaddr;
if (text_vaddr != 0ULL && etext_vaddr != 0ULL)
break;
}
}