xin/ysyx-workbench
1
0
Fork 0
Code Issues Pull requests 1 Projects Releases Packages Wiki Activity Actions

> compile NEMU

Browse source 
ysyx_22040000 李心杨
Linux calcite 6.6.19 #1-NixOS SMP PREEMPT_DYNAMIC Fri Mar  1 12:35:11 UTC 2024 x86_64 GNU/Linux
 19:46:03  up   6:51,  2 users,  load average: 0.76, 0.68, 0.61
This commit is contained in:
tracer-ysyx 2024-03-20 19:46:03 +08:00 committed by xinyangli
parent 3358125504
commit 8e0d229f49
2 changed files with 15 additions and 12 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

9
nemu/Kconfig
View file

@ -143,8 +143,11 @@ config TRACE_END
config ITRACE
depends on TRACE && TARGET_NATIVE_ELF && ENGINE_INTERPRETER
bool "Enable instruction tracer"
bool "Enable instruction tracing"
default y
help
Instraction tracing will log past instructions into a ring buffer
and print them when NEMU exit unexpectedly.
config ITRACE_COND
depends on ITRACE
@ -158,7 +161,7 @@ config ITRACE_BUFFER
config MTRACE
depends on TRACE && TARGET_NATIVE_ELF && ENGINE_INTERPRETER
bool "Enable memory tracer"
bool "Enable memory tracing"
default n
config MTRACE_RANGE
@ -176,7 +179,7 @@ config MTRACE_RANGE_MAX
config FTRACE
depends on TRACE && TARGET_NATIVE_ELF && ENGINE_INTERPRETER
bool "Enable function tracer"
bool "Enable function tracing"
default y
config FTRACE_STACK_SIZE

18
nemu/src/utils/ftrace.c
View file

@ -35,9 +35,9 @@ void init_elf(const char *path) {
func_table = (func_t *)calloc(func_table_size, sizeof(func_t));
assert(func_table);
FAILED_GOTO(failed_nosym, fread(&header, sizeof(Elf32_Ehdr), 1, elf_file) <= 0);
FAILED_GOTO(failed_nosym, fseek(elf_file, header.e_shoff, SEEK_SET) != 0);
FAILED_GOTO(failed_nosym, fread(section_header, header.e_shentsize, header.e_shnum, elf_file) <= 0);
FAILED_GOTO(failed_header, fread(&header, sizeof(Elf32_Ehdr), 1, elf_file) <= 0);
FAILED_GOTO(failed_header, fseek(elf_file, header.e_shoff, SEEK_SET) != 0);
FAILED_GOTO(failed_header, fread(section_header, header.e_shentsize, header.e_shnum, elf_file) <= 0);
char *shstrtab = calloc(1, section_header[header.e_shstrndx].sh_size);
FAILED_GOTO(failed_shstrtab, fseek(elf_file, section_header[header.e_shstrndx].sh_offset, SEEK_SET) != 0);
@ -56,16 +56,16 @@ void init_elf(const char *path) {
int sym_length = symtab->sh_size / sizeof(Elf32_Sym);
Elf32_Sym *sym = calloc(sym_length, sizeof(Elf32_Sym));
assert(sym);
FAILED_GOTO(failed, fseek(elf_file, symtab->sh_offset, SEEK_SET) != 0);
FAILED_GOTO(failed, fread(sym, sizeof(Elf32_Sym), sym_length, elf_file) <= 0);
FAILED_GOTO(failed_funcname, fseek(elf_file, symtab->sh_offset, SEEK_SET) != 0);
FAILED_GOTO(failed_funcname, fread(sym, sizeof(Elf32_Sym), sym_length, elf_file) <= 0);
for(int j = 0; j < sym_length; j++) {
if(ELF32_ST_TYPE(sym[j].st_info) != STT_FUNC) continue;
// Only read function type symbol
func_t *f = &func_table[func_table_len];
char *func = (char *)malloc(30);
FAILED_GOTO(failed, fseek(elf_file, strtab->sh_offset + sym[j].st_name, SEEK_SET) != 0);
FAILED_GOTO(failed, fgets(func, 30, elf_file) <= 0);
FAILED_GOTO(failed_funcname, fseek(elf_file, strtab->sh_offset + sym[j].st_name, SEEK_SET) != 0);
FAILED_GOTO(failed_funcname, fgets(func, 30, elf_file) <= 0);
f->start = sym[j].st_value;
f->len = sym[j].st_size;
f->name = func;
@ -85,11 +85,11 @@ success:
free(shstrtab);
return;
failed:
failed_funcname:
free(sym);
failed_shstrtab:
free(shstrtab);
failed_nosym:
failed_header:
for(int i = 0; i < func_table_len; i++) {
func_t *f = &func_table[i];
if(f->name) { free(f->name); }