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[init] Switch init to driver_main instead of custom _start

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init still uses a custom _start to set up the stack, but then jumps to
_libc_crt0_start. The modules data passed to it is taken from the
j6_init_args instead of having it stashed into a global variable.

Also replace several uses of snprintf/j6_log with j6::syslog.
This commit is contained in:
Justin C. Miller
2023-02-20 11:15:08 -08:00
parent c092e07832
commit 4c9ff44b1c
4 changed files with 28 additions and 54 deletions
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24
src/user/srv.init/loader.cpp
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@@ -7,6 +7,7 @@
#include <j6/errors.h>
#include <j6/flags.h>
#include <j6/syscalls.h>
#include <j6/syslog.hh>
#include <util/enum_bitfields.h>
#include "loader.h"
@@ -40,7 +41,6 @@ load_program(
const char *name,
util::const_buffer data,
j6_handle_t sys, j6_handle_t slp,
char *err_msg,
const module *arg)
{
uintptr_t base_address = reinterpret_cast<uintptr_t>(data.pointer);
@@ -48,26 +48,26 @@ load_program(
elf::file progelf {data};
if (!progelf.valid()) {
sprintf(err_msg, " ** error loading program '%s': ELF is invalid", name);
j6::syslog(" ** error loading program '%s': ELF is invalid", name);
return false;
}
j6_handle_t proc = j6_handle_invalid;
j6_status_t res = j6_process_create(&proc);
if (res != j6_status_ok) {
sprintf(err_msg, " ** error loading program '%s': creating process: %lx", name, res);
j6::syslog(" ** error loading program '%s': creating process: %lx", name, res);
return false;
}
res = j6_process_give_handle(proc, sys);
if (res != j6_status_ok) {
sprintf(err_msg, " ** error loading program '%s': giving system handle: %lx", name, res);
j6::syslog(" ** error loading program '%s': giving system handle: %lx", name, res);
return false;
}
res = j6_process_give_handle(proc, slp);
if (res != j6_status_ok) {
sprintf(err_msg, " ** error loading program '%s': giving SLP handle: %lx", name, res);
j6::syslog(" ** error loading program '%s': giving SLP handle: %lx", name, res);
return false;
}
@@ -88,7 +88,7 @@ load_program(
j6_handle_t sub_vma = j6_handle_invalid;
res = j6_vma_create_map(&sub_vma, seg.mem_size+prologue, load_addr, flags);
if (res != j6_status_ok) {
sprintf(err_msg, " ** error loading program '%s': creating sub vma: %lx", name, res);
j6::syslog(" ** error loading program '%s': creating sub vma: %lx", name, res);
return false;
}
@@ -100,13 +100,13 @@ load_program(
res = j6_vma_map(sub_vma, proc, seg.vaddr & ~0xfffull);
if (res != j6_status_ok) {
sprintf(err_msg, " ** error loading program '%s': mapping sub vma to child: %lx", name, res);
j6::syslog(" ** error loading program '%s': mapping sub vma to child: %lx", name, res);
return false;
}
res = j6_vma_unmap(sub_vma, 0);
if (res != j6_status_ok) {
sprintf(err_msg, " ** error loading program '%s': unmapping sub vma: %lx", name, res);
j6::syslog(" ** error loading program '%s': unmapping sub vma: %lx", name, res);
return false;
}
}
@@ -114,7 +114,7 @@ load_program(
j6_handle_t stack_vma = j6_handle_invalid;
res = j6_vma_create_map(&stack_vma, stack_size, load_addr, j6_vm_flag_write);
if (res != j6_status_ok) {
sprintf(err_msg, " ** error loading program '%s': creating stack vma: %lx", name, res);
j6::syslog(" ** error loading program '%s': creating stack vma: %lx", name, res);
return false;
}
@@ -136,20 +136,20 @@ load_program(
res = j6_vma_map(stack_vma, proc, stack_top-stack_size);
if (res != j6_status_ok) {
sprintf(err_msg, " ** error loading program '%s': mapping stack vma: %lx", name, res);
j6::syslog(" ** error loading program '%s': mapping stack vma: %lx", name, res);
return false;
}
res = j6_vma_unmap(stack_vma, 0);
if (res != j6_status_ok) {
sprintf(err_msg, " ** error loading program '%s': unmapping stack vma: %lx", name, res);
j6::syslog(" ** error loading program '%s': unmapping stack vma: %lx", name, res);
return false;
}
j6_handle_t thread = j6_handle_invalid;
res = j6_thread_create(&thread, proc, stack_top - stack_consumed, progelf.entrypoint(), arg0, 0);
if (res != j6_status_ok) {
sprintf(err_msg, " ** error loading program '%s': creating thread: %lx", name, res);
j6::syslog(" ** error loading program '%s': creating thread: %lx", name, res);
return false;
}