void _DkDebugAddMap (struct link_map * map)
{
const ElfW(Ehdr) * ehdr = (void *) map->l_map_start;
int shdrsz = sizeof(ElfW(Shdr)) * ehdr->e_shnum;
ElfW(Shdr) * shdr = NULL;
ElfW(Phdr) * phdr = (void *) (map->l_map_start + ehdr->e_phoff);
const ElfW(Phdr) * ph;
int fd = ocall_open(map->l_name, O_RDONLY, 0);
if (fd < 0)
return;
for (ph = phdr; ph < &phdr[ehdr->e_phnum]; ++ph)
if (ph->p_type == PT_LOAD &&
ehdr->e_shoff >= ph->p_offset &&
ehdr->e_shoff < ph->p_offset + ph->p_filesz) {
shdr = (void *) map->l_addr + ph->p_vaddr +
(ehdr->e_shoff - ph->p_offset);
break;
}
if (!shdr) {
shdr = __alloca(shdrsz);
unsigned long s = ALLOC_ALIGNDOWN(ehdr->e_shoff);
unsigned long e = ALLOC_ALIGNUP(ehdr->e_shoff + shdrsz);
void * umem;
ocall_map_untrusted(fd, s, e - s, PROT_READ, &umem);
memcpy(shdr, umem + ehdr->e_shoff - s, shdrsz);
ocall_unmap_untrusted(umem, e - s);
}
ElfW(Shdr) * shdrend = (void *) shdr + shdrsz;
int shstroff = shdr[ehdr->e_shstrndx].sh_offset;
size_t shstrsz = shdr[ehdr->e_shstrndx].sh_size;
const char * shstrtab = NULL;
for (ph = phdr; ph < &phdr[ehdr->e_phnum]; ++ph)
if (ph->p_type == PT_LOAD &&
shstroff >= ph->p_offset &&
shstroff < ph->p_offset + ph->p_filesz) {
shstrtab = (void *) map->l_addr + ph->p_vaddr +
(shstroff - ph->p_offset);
break;
}
if (!shstrtab) {
shstrtab = __alloca(shstrsz);
unsigned long s = ALLOC_ALIGNDOWN(shstroff);
unsigned long e = ALLOC_ALIGNUP(shstroff + shstrsz);
void * umem;
ocall_map_untrusted(fd, s, e - s, PROT_READ, &umem);
memcpy((void *) shstrtab, umem + shstroff - s, shstrsz);
ocall_unmap_untrusted(umem, e - s);
}
ocall_close(fd);
ElfW(Addr) text_addr = 0;
for (ElfW(Shdr) * s = shdr ; s < shdrend ; s++)
if (strcmp_static(shstrtab + s->sh_name, ".text")) {
text_addr = map->l_addr + s->sh_addr;
break;
}
if (!text_addr)
return;
#define BUFFER_LENGTH 4096
char buffer[BUFFER_LENGTH], * ptr = buffer;
snprintf(ptr, BUFFER_LENGTH - (ptr - buffer),
"add-symbol-file %s 0x%016llx -readnow", map->l_name, text_addr);
ptr += strlen(ptr);
for (ElfW(Shdr) * s = shdr ; s < shdrend ; s++) {
if (!s->sh_name || !s->sh_addr)
continue;
if (strcmp_static(shstrtab + s->sh_name, ".text"))
continue;
if (s->sh_type == SHT_NULL)
continue;
if (strpartcmp_static(shstrtab + s->sh_name, ".debug_"))
continue;
snprintf(ptr, BUFFER_LENGTH - (ptr - buffer),
" -s %s 0x%016llx", shstrtab + s->sh_name,
map->l_addr + s->sh_addr);
ptr += strlen(ptr);
}
ocall_load_debug(buffer);
}
void pal_main (PAL_NUM pal_token, void * pal_addr,
const char * pal_name,
int argc, const char ** argv, const char ** envp,
PAL_HANDLE parent_handle,
PAL_HANDLE thread_handle,
PAL_HANDLE exec_handle,
PAL_HANDLE manifest_handle)
{
int ret;
bool is_parent = !parent_handle;
#if PROFILING == 1
__pal_control.host_specific_startup_time =
_DkSystemTimeQuery() - pal_state.start_time;
#endif
pal_state.pal_token = pal_token;
pal_state.pal_addr = pal_addr;
pal_state.parent_handle = parent_handle;
pal_state.pagesize = _DkGetPagesize();
pal_state.alloc_align = _DkGetAllocationAlignment();
pal_state.alloc_shift = pal_state.alloc_align - 1;
pal_state.alloc_mask = ~pal_state.alloc_shift;
init_slab_mgr(pal_state.alloc_align);
char * exec = NULL, * manifest = NULL;
if (exec_handle) {
exec = __alloca(URI_MAX);
ret = _DkStreamGetName(exec_handle, exec, URI_MAX);
if (ret < 0)
init_fail(-ret, "cannot get executable name");
}
if (manifest_handle) {
manifest = __alloca(URI_MAX);
ret = _DkStreamGetName(manifest_handle, manifest, URI_MAX);
if (ret < 0)
init_fail(-ret, "cannot get manifest name");
} else {
if (is_parent) {
#if PROFILING == 1
unsigned long before_find_manifest = _DkSystemTimeQuery();
#endif
do {
if (exec_handle) {
assert(!!exec);
/* try open "<exec>.manifest" */
manifest = __alloca(URI_MAX);
snprintf(manifest, URI_MAX, "%s.manifest", exec);
ret = _DkStreamOpen(&manifest_handle,
manifest,
PAL_ACCESS_RDONLY, 0, 0, 0);
if (!ret)
break;
}
/* try open "file:manifest" */
manifest = "file:manifest";
ret = _DkStreamOpen(&manifest_handle,
manifest,
PAL_ACCESS_RDONLY, 0, 0, 0);
if (!ret)
break;
/* well, there is no manifest file, leave it alone */
if (!manifest_handle)
printf("Can't fine any manifest, will run without one\n");
} while (0);
#if PROFILING == 1
pal_state.manifest_loading_time +=
_DkSystemTimeQuery() - before_find_manifest;
#endif
}
}
/* load manifest if there is one */
if (manifest_handle) {
#if PROFILING == 1
unsigned long before_load_manifest = _DkSystemTimeQuery();
#endif
PAL_STREAM_ATTR attr;
ret = _DkStreamAttributesQuerybyHandle(manifest_handle, &attr);
if (ret < 0)
init_fail(-ret, "cannot open manifest file");
void * cfg_addr = NULL;
int cfg_size = attr.pending_size;
ret = _DkStreamMap(manifest_handle, &cfg_addr,
PAL_PROT_READ, 0,
ALLOC_ALIGNUP(cfg_size));
if (ret < 0)
init_fail(-ret, "cannot open manifest file");
struct config_store * root_config = malloc(sizeof(struct config_store));
root_config->raw_data = cfg_addr;
root_config->raw_size = cfg_size;
root_config->malloc = malloc;
root_config->free = free;
const char * errstring = NULL;
if ((ret = read_config(root_config, loader_filter, &errstring)) < 0)
init_fail(-ret, errstring);
pal_state.root_config = root_config;
#if PROFILING == 1
pal_state.manifest_loading_time +=
_DkSystemTimeQuery() - before_load_manifest;
#endif
}
/* if there is no executable, try to find one in the manifest */
if (is_parent && !exec_handle) {
exec = __alloca(URI_MAX);
assert(!!pal_state.root_config);
ret = get_config(pal_state.root_config, "loader.exec", exec, URI_MAX);
if (ret > 0) {
ret = _DkStreamOpen(&exec_handle, exec, PAL_ACCESS_RDONLY,
0, 0, 0);
if (ret < 0)
init_fail(-ret, "cannot open executable");
/* must be a ELF */
if (check_elf_object(exec_handle) < 0)
init_fail(PAL_ERROR_INVAL, "executable is not a ELF binary");
} else {
exec = NULL;
}
}
if (is_parent && !exec_handle && !manifest_handle) {
printf("USAGE: %s [executable|manifest] args ...\n", pal_name);
_DkProcessExit(0);
return;
}
pal_state.manifest = manifest;
pal_state.manifest_handle = manifest_handle;
pal_state.exec = exec;
pal_state.exec_handle = exec_handle;
const char * first_argv = *argv;
argc--;
argv++;
if (is_parent && exec_handle) {
first_argv = exec;
if (pal_state.root_config) {
char cfgbuf[CONFIG_MAX];
ret = get_config(pal_state.root_config, "loader.execname", cfgbuf,
CONFIG_MAX);
if (ret > 0)
first_argv = remalloc(cfgbuf, ret + 1);
}
}
if (pal_state.root_config)
load_libraries();
if (exec_handle) {
#if PROFILING == 1
unsigned long before_load_exec = _DkSystemTimeQuery();
#endif
ret = load_elf_object_by_handle(exec_handle, OBJECT_EXEC);
if (ret < 0)
init_fail(ret, PAL_STRERROR(ret));
#if PROFILING == 1
pal_state.linking_time += _DkSystemTimeQuery() - before_load_exec;
#endif
}
#if PROFILING == 1
unsigned long before_tail = _DkSystemTimeQuery();
#endif
if (pal_state.root_config) {
read_envs(&envp);
set_debug_type();
set_syscall_symbol();
}
__pal_control.process_id = _DkGetProcessId();
__pal_control.host_id = _DkGetHostId();
__pal_control.manifest_handle = manifest_handle;
__pal_control.executable = exec;
__pal_control.parent_process = parent_handle;
__pal_control.first_thread = thread_handle;
_DkGetAvailableUserAddressRange(&__pal_control.user_address.start,
&__pal_control.user_address.end);
__pal_control.pagesize = pal_state.pagesize;
__pal_control.alloc_align = pal_state.alloc_align;
__pal_control.broadcast_stream = _DkBroadcastStreamOpen();
_DkGetCPUInfo(&__pal_control.cpu_info);
__pal_control.mem_info.mem_total = _DkMemoryQuota();
#if PROFILING == 1
pal_state.tail_startup_time += _DkSystemTimeQuery() - before_tail;
__pal_control.relocation_time = pal_state.relocation_time;
__pal_control.linking_time = pal_state.linking_time;
__pal_control.manifest_loading_time
= pal_state.manifest_loading_time;
__pal_control.allocation_time = pal_state.slab_time;
__pal_control.child_creation_time = is_parent ? 0 : pal_state.start_time -
pal_state.process_create_time;
#endif
/* Now we will start the execution */
start_execution(first_argv, argc, argv, envp);
/* We wish we will never reached here */
init_fail(PAL_ERROR_DENIED, "unexpected termination");
}
