2003-01-06 Yoshinori K. Okuji <okuji@enbug.org>
* util/i386/pc/pupa-setup.c: Include pupa/machine/kernel.h. (setup): Configure the installed partition information and the dl prefix. * loader/i386/pc/chainloader.c (my_mod): New variable. (pupa_chainloader_unload): New function. (pupa_rescue_cmd_chainloader): Refer itself. (PUPA_MOD_INIT): Save its own module in MY_MOD. * kern/i386/pc/startup.S (install_partition): Removed. (version_string): Likewise. (config_file): Likewise. (pupa_install_dos_part): New variable. (pupa_install_bsd_part): Likewise. (pupa_prefix): Likewise. (pupa_chainloader_real_boot): Call pupa_dl_unload_all. * kern/i386/pc/init.c: Include pupa/machine/kernel.h, pupa/dl.h and pupa/misc.h. (make_install_device): New function. (pupa_machine_init): Set the dl prefix. * kern/rescue.c: Include pupa/rescue.h and pupa/dl.h. (buf): Renamed to ... (linebuf): ... this. (pupa_rescue_cmd_prefix): New function. (pupa_rescue_cmd_insmod): Likewise. (pupa_rescue_cmd_rmmod): Likewise. (pupa_rescue_cmd_lsmod): Likewise. (pupa_enter_rescue_mode): Register new commands: prefix, insmod, rmmod and lsmod. * kern/mm.c (pupa_memalign): If failed even after invalidating disk caches, unload unneeded modules and retry. * kern/misc.c (pupa_memmove): New function. (pupa_memcpy): Removed. (pupa_strcpy): New function. (pupa_itoa): Made static. * kern/dl.c (pupa_dl_iterate): New function. (pupa_dl_ref): Likewise. (pupa_dl_unref): Likewise. (pupa_dl_unload): Return if succeeded or not. (pupa_dl_unload_unneeded): New function. (pupa_dl_unload_all): Likewise. (pupa_dl_init): Renamed to ... (pupa_dl_set_prefix): ... this. (pupa_dl_get_prefix): New function. * include/pupa/i386/pc/kernel.h: Include pupa/types.h. (PUPA_KERNEL_MACHINE_INSTALL_DOS_PART): New macro. (PUPA_KERNEL_MACHINE_INSTALL_BSD_PART): Likewise. (PUPA_KERNEL_MACHINE_PREFIX): Likewise. (pupa_install_dos_part): Declared. (pupa_install_bsd_part): Likewise. (pupa_prefix): Likewise. (pupa_boot_drive): Likewise. * include/pupa/types.h: Fix a typo. * include/pupa/misc.h (pupa_memcpy): New macro. Just an alias to pupa_memmove. (pupa_memmove): Declared. (pupa_strcpy): Likewise. * include/pupa/dl.h (PUPA_MOD_INIT): Change the prototype. Now pupa_mod_init takes one argument, its own module. (pupa_dl_unload_unneeded): Declared. (pupa_dl_unload_all): Likewise. (pupa_dl_ref): Likewise. (pupa_dl_unref): Likewise. (pupa_dl_iterate): Likewise. (pupa_dl_init): Renamed to ... (pupa_dl_set_prefix): ... this. (pupa_dl_get_prefix): Declared. * fs/fat.c [!PUPA_UTIL] (my_mod): New variable. (pupa_fat_dir) [!PUPA_UTIL]: Prevent the fat module from being unloaded. (pupa_fat_open) [!PUPA_UTIL]: Refer itself if succeeded. (pupa_fat_close) [!PUPA_UTIL]: Unrefer itself. * configure.ac (tmp_CFLAGS): Added -Wshadow, -Wpointer-arith, -Wmissing-prototypes, -Wundef and -Wstrict-prototypes.
This commit is contained in:
okuji
parent
012d7999fe
commit
a5ffe96617
17 changed files with 553 additions and 79 deletions
96
kern/dl.c
96
kern/dl.c
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@ -109,6 +109,16 @@ pupa_dl_get (const char *name)
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return 0;
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}
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void
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pupa_dl_iterate (int (*hook) (pupa_dl_t mod))
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{
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pupa_dl_list_t l;
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for (l = pupa_dl_head; l; l = l->next)
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if (hook (l->mod))
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break;
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}
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struct pupa_symbol
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@ -345,9 +355,9 @@ pupa_dl_resolve_symbols (pupa_dl_t mod, Elf_Ehdr *e)
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return pupa_errno;
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if (pupa_strcmp (name, "pupa_mod_init") == 0)
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mod->init = (void (*) ()) sym->st_value;
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mod->init = (void (*) (pupa_dl_t)) sym->st_value;
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else if (pupa_strcmp (name, "pupa_mod_fini") == 0)
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mod->fini = (void (*) ()) sym->st_value;
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mod->fini = (void (*) (void)) sym->st_value;
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break;
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case STT_SECTION:
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@ -372,7 +382,7 @@ static void
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pupa_dl_call_init (pupa_dl_t mod)
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{
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if (mod->init)
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(mod->init) ();
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(mod->init) (mod);
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}
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static pupa_err_t
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@ -428,6 +438,8 @@ pupa_dl_resolve_dependencies (pupa_dl_t mod, Elf_Ehdr *e)
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m = pupa_dl_load (name);
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if (! m)
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return pupa_errno;
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pupa_dl_ref (m);
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dep = (pupa_dl_dep_t) pupa_malloc (sizeof (*dep));
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if (! dep)
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@ -444,6 +456,24 @@ pupa_dl_resolve_dependencies (pupa_dl_t mod, Elf_Ehdr *e)
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return PUPA_ERR_NONE;
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}
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int
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pupa_dl_ref (pupa_dl_t mod)
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{
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return ++mod->ref_count;
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}
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int
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pupa_dl_unref (pupa_dl_t mod)
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{
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int ret;
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ret = --mod->ref_count;
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if (ret <= 0)
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pupa_dl_unload (mod);
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return ret;
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}
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/* Load a module from core memory. */
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pupa_dl_t
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pupa_dl_load_core (void *addr, pupa_size_t size)
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@ -513,6 +543,7 @@ pupa_dl_load_file (const char *filename)
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goto failed;
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mod = pupa_dl_load_core (core, size);
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mod->ref_count = 0;
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failed:
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pupa_file_close (file);
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@ -532,10 +563,7 @@ pupa_dl_load (const char *name)
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mod = pupa_dl_get (name);
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if (mod)
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{
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mod->ref_count++;
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return mod;
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}
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return mod;
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if (! pupa_dl_dir)
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pupa_fatal ("module dir is not initialized yet");
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@ -559,14 +587,14 @@ pupa_dl_load (const char *name)
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}
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/* Unload the module MOD. */
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void
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int
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pupa_dl_unload (pupa_dl_t mod)
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{
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pupa_dl_dep_t dep, depn;
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pupa_dl_segment_t seg, segn;
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if (--mod->ref_count > 0)
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return;
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if (mod->ref_count > 0)
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return 0;
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if (mod->fini)
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(mod->fini) ();
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@ -577,7 +605,7 @@ pupa_dl_unload (pupa_dl_t mod)
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for (dep = mod->dep; dep; dep = depn)
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{
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depn = dep->next;
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pupa_dl_unload (dep->mod);
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pupa_dl_unref (dep->mod);
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pupa_free (dep);
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}
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@ -590,10 +618,54 @@ pupa_dl_unload (pupa_dl_t mod)
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pupa_free (mod->name);
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pupa_free (mod);
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return 1;
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}
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/* Unload unneeded modules. */
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void
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pupa_dl_unload_unneeded (void)
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{
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/* Because pupa_dl_remove modifies the list of modules, this
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implementation is tricky. */
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pupa_dl_list_t p = pupa_dl_head;
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while (p)
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{
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if (pupa_dl_unload (p->mod))
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{
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p = pupa_dl_head;
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continue;
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}
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p = p->next;
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}
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}
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/* Unload all modules. */
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void
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pupa_dl_unload_all (void)
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{
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while (pupa_dl_head)
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{
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pupa_dl_list_t p;
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pupa_dl_unload_unneeded ();
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/* Force to decrement the ref count. This will purge pre-loaded
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modules and manually inserted modules. */
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for (p = pupa_dl_head; p; p = p->next)
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p->mod->ref_count--;
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}
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}
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void
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pupa_dl_init (const char *dir)
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pupa_dl_set_prefix (const char *dir)
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{
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pupa_dl_dir = (char *) dir;
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}
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const char *
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pupa_dl_get_prefix (void)
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{
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return pupa_dl_dir;
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}
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@ -23,8 +23,33 @@
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#include <pupa/machine/memory.h>
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#include <pupa/machine/console.h>
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#include <pupa/machine/biosdisk.h>
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#include <pupa/machine/kernel.h>
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#include <pupa/types.h>
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#include <pupa/err.h>
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#include <pupa/dl.h>
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#include <pupa/misc.h>
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static char *
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make_install_device (void)
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{
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/* XXX: This should be enough. */
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char dev[100];
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pupa_sprintf (dev, "(%cd%u",
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(pupa_boot_drive & 0x80) ? 'h' : 'f',
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pupa_boot_drive & 0x7f);
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if (pupa_install_dos_part >= 0)
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pupa_sprintf (dev + pupa_strlen (dev), ",%u", pupa_install_dos_part);
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if (pupa_install_bsd_part >= 0)
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pupa_sprintf (dev + pupa_strlen (dev), ",%c", pupa_install_bsd_part + 'a');
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pupa_sprintf (dev + pupa_strlen (dev), ")%s", pupa_prefix);
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pupa_strcpy (pupa_prefix, dev);
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return pupa_prefix;
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}
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void
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pupa_machine_init (void)
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@ -112,4 +137,7 @@ pupa_machine_init (void)
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/* The memory system was initialized, thus register built-in devices. */
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pupa_biosdisk_init ();
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/* Initialize the prefix. */
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pupa_dl_set_prefix (make_install_device ());
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}
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@ -87,18 +87,18 @@ VARIABLE(pupa_total_module_size)
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.long 0
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VARIABLE(pupa_kernel_image_size)
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.long 0
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VARIABLE(install_partition)
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.long 0xFFFFFF
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VARIABLE(version_string)
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.string PACKAGE_VERSION
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VARIABLE(config_file)
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.string "/boot/pupa/puparc"
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VARIABLE(pupa_install_dos_part)
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.long 0xFFFFFFFF
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VARIABLE(pupa_install_bsd_part)
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.long 0xFFFFFFFF
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VARIABLE(pupa_prefix)
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.string "/boot/pupa"
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/*
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* Leave some breathing room for the config file name.
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* Leave some breathing room for the prefix.
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*/
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. = EXT_C(start) + 0x70
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. = EXT_C(start) + 0x50
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/* the real mode code continues... */
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codestart:
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@ -261,13 +261,16 @@ FUNCTION(pupa_halt)
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*/
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FUNCTION(pupa_chainloader_real_boot)
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/* no need to save anything */
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pushl %edx
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pushl %eax
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/* ESI must point to a partition table entry */
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movl %edx, %esi
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call EXT_C(pupa_dl_unload_all)
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/* set up to pass boot drive */
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movl %eax, %edx
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popl %edx
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/* ESI must point to a partition table entry */
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popl %esi
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/* Turn off Gate A20 */
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xorl %eax, %eax
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58
kern/misc.c
58
kern/misc.c
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@ -26,17 +26,53 @@
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#include <pupa/term.h>
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void *
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pupa_memcpy (void *dest, const void *src, pupa_size_t n)
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pupa_memmove (void *dest, const void *src, pupa_size_t n)
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{
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char *d = (char *) dest;
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char *s = (char *) src;
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while (n--)
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*d++ = *s++;
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const char *s = (const char *) src;
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if (d < s)
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while (n--)
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*d++ = *s++;
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else
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{
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d += n;
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s += n;
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while (n--)
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*--d = *--s;
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}
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return dest;
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}
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char *
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pupa_strcpy (char *dest, const char *src)
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{
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char *p = dest;
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while ((*p++ = *src++) != '\0')
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;
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return dest;
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}
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#if 0
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char *
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pupa_strcat (char *dest, const char *src)
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{
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char *p = dest;
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while (*p)
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p++;
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while ((*p++ = *src++) != '\0')
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;
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return dest;
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}
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#endif
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int
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pupa_printf (const char *fmt, ...)
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{
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@ -237,7 +273,7 @@ pupa_memset (void *s, int c, pupa_size_t n)
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pupa_size_t
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pupa_strlen (const char *s)
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{
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char *p = (char *) s;
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const char *p = s;
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while (*p)
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p++;
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@ -262,7 +298,7 @@ pupa_reverse (char *str)
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}
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}
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char *
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static char *
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pupa_itoa (char *str, int c, unsigned n)
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{
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unsigned base = (c == 'x') ? 16 : 10;
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@ -292,15 +328,15 @@ pupa_vsprintf (char *str, const char *fmt, va_list args)
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{
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char c;
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int count = 0;
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auto void write_char (char c);
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auto void write_char (char ch);
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auto void write_str (const char *s);
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void write_char (char c)
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void write_char (char ch)
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{
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if (str)
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*str++ = c;
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*str++ = ch;
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else
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pupa_putchar (c);
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pupa_putchar (ch);
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count++;
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}
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21
kern/mm.c
21
kern/mm.c
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@ -195,7 +195,7 @@ pupa_memalign (pupa_size_t align, pupa_size_t size)
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{
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pupa_mm_region_t r;
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pupa_size_t n = ((size + PUPA_MM_ALIGN - 1) >> PUPA_MM_ALIGN_LOG2) + 1;
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int first = 1;
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int count = 0;
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align = (align >> PUPA_MM_ALIGN_LOG2);
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if (align == 0)
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@ -212,14 +212,25 @@ pupa_memalign (pupa_size_t align, pupa_size_t size)
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return p;
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}
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/* If failed, invalidate disk caches to increase free memory. */
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if (first)
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/* If failed, increase free memory somehow. */
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switch (count)
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{
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case 0:
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/* Invalidate disk caches. */
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pupa_disk_cache_invalidate_all ();
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first = 0;
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count++;
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goto again;
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case 1:
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/* Unload unneeded modules. */
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pupa_dl_unload_unneeded ();
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count++;
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goto again;
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}
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default:
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break;
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}
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pupa_error (PUPA_ERR_OUT_OF_MEMORY, "out of memory");
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return 0;
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}
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116
kern/rescue.c
116
kern/rescue.c
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@ -19,6 +19,7 @@
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*/
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#include <pupa/kernel.h>
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#include <pupa/rescue.h>
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#include <pupa/term.h>
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#include <pupa/misc.h>
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#include <pupa/disk.h>
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@ -26,6 +27,7 @@
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#include <pupa/mm.h>
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#include <pupa/err.h>
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#include <pupa/loader.h>
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#include <pupa/dl.h>
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#include <pupa/machine/partition.h>
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#define PUPA_RESCUE_BUF_SIZE 256
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@ -40,7 +42,7 @@ struct pupa_rescue_command
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};
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typedef struct pupa_rescue_command *pupa_rescue_command_t;
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static char buf[PUPA_RESCUE_BUF_SIZE];
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static char linebuf[PUPA_RESCUE_BUF_SIZE];
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static pupa_rescue_command_t pupa_rescue_command_list;
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@ -85,7 +87,7 @@ pupa_rescue_get_command_line (const char *prompt)
|
|||
int pos = 0;
|
||||
|
||||
pupa_printf (prompt);
|
||||
pupa_memset (buf, 0, PUPA_RESCUE_BUF_SIZE);
|
||||
pupa_memset (linebuf, 0, PUPA_RESCUE_BUF_SIZE);
|
||||
|
||||
while ((c = PUPA_TERM_ASCII_CHAR (pupa_getkey ())) != '\n' && c != '\r')
|
||||
{
|
||||
|
|
@ -93,7 +95,7 @@ pupa_rescue_get_command_line (const char *prompt)
|
|||
{
|
||||
if (pos < PUPA_RESCUE_BUF_SIZE - 1)
|
||||
{
|
||||
buf[pos++] = c;
|
||||
linebuf[pos++] = c;
|
||||
pupa_putchar (c);
|
||||
}
|
||||
}
|
||||
|
|
@ -101,7 +103,7 @@ pupa_rescue_get_command_line (const char *prompt)
|
|||
{
|
||||
if (pos > 0)
|
||||
{
|
||||
buf[--pos] = 0;
|
||||
linebuf[--pos] = 0;
|
||||
pupa_putchar (c);
|
||||
pupa_putchar (' ');
|
||||
pupa_putchar (c);
|
||||
|
|
@ -475,6 +477,7 @@ pupa_rescue_cmd_testload (int argc, char *argv[])
|
|||
}
|
||||
#endif
|
||||
|
||||
/* dump ADDRESS [SIZE] */
|
||||
static void
|
||||
pupa_rescue_cmd_dump (int argc, char *argv[])
|
||||
{
|
||||
|
|
@ -501,6 +504,99 @@ pupa_rescue_cmd_dump (int argc, char *argv[])
|
|||
}
|
||||
}
|
||||
|
||||
/* prefix [DIR] */
|
||||
static void
|
||||
pupa_rescue_cmd_prefix (int argc, char *argv[])
|
||||
{
|
||||
static char prefix[100];
|
||||
|
||||
if (argc == 0)
|
||||
pupa_printf ("%s\n", pupa_dl_get_prefix ());
|
||||
else
|
||||
{
|
||||
if (pupa_strlen (argv[0]) >= sizeof (prefix))
|
||||
{
|
||||
pupa_error (PUPA_ERR_BAD_ARGUMENT, "too long prefix");
|
||||
return;
|
||||
}
|
||||
|
||||
pupa_strcpy (prefix, argv[0]);
|
||||
pupa_dl_set_prefix (prefix);
|
||||
}
|
||||
}
|
||||
|
||||
/* insmod MODULE */
|
||||
static void
|
||||
pupa_rescue_cmd_insmod (int argc, char *argv[])
|
||||
{
|
||||
char *p;
|
||||
pupa_dl_t mod;
|
||||
|
||||
if (argc == 0)
|
||||
{
|
||||
pupa_error (PUPA_ERR_BAD_ARGUMENT, "no module specified");
|
||||
return;
|
||||
}
|
||||
|
||||
p = pupa_strchr (argv[0], '/');
|
||||
if (! p)
|
||||
mod = pupa_dl_load (argv[0]);
|
||||
else
|
||||
mod = pupa_dl_load_file (argv[0]);
|
||||
|
||||
if (mod)
|
||||
pupa_dl_ref (mod);
|
||||
}
|
||||
|
||||
/* rmmod MODULE */
|
||||
static void
|
||||
pupa_rescue_cmd_rmmod (int argc, char *argv[])
|
||||
{
|
||||
pupa_dl_t mod;
|
||||
|
||||
if (argc == 0)
|
||||
{
|
||||
pupa_error (PUPA_ERR_BAD_ARGUMENT, "no module specified");
|
||||
return;
|
||||
}
|
||||
|
||||
mod = pupa_dl_get (argv[0]);
|
||||
if (! mod)
|
||||
{
|
||||
pupa_error (PUPA_ERR_BAD_ARGUMENT, "no such module");
|
||||
return;
|
||||
}
|
||||
|
||||
pupa_dl_unref (mod);
|
||||
}
|
||||
|
||||
/* lsmod */
|
||||
static void
|
||||
pupa_rescue_cmd_lsmod (int argc __attribute__ ((unused)),
|
||||
char *argv[] __attribute__ ((unused)))
|
||||
{
|
||||
auto int print_module (pupa_dl_t mod);
|
||||
|
||||
int print_module (pupa_dl_t mod)
|
||||
{
|
||||
pupa_dl_dep_t dep;
|
||||
|
||||
pupa_printf ("%s\t%d\t\t", mod->name, mod->ref_count);
|
||||
for (dep = mod->dep; dep; dep = dep->next)
|
||||
{
|
||||
if (dep != mod->dep)
|
||||
pupa_putchar (',');
|
||||
|
||||
pupa_printf ("%s", dep->mod->name);
|
||||
}
|
||||
pupa_putchar ('\n');
|
||||
return 0;
|
||||
}
|
||||
|
||||
pupa_printf ("Name\tRef Count\tDependencies\n");
|
||||
pupa_dl_iterate (print_module);
|
||||
}
|
||||
|
||||
/* Enter the rescue mode. */
|
||||
void
|
||||
pupa_enter_rescue_mode (void)
|
||||
|
|
@ -518,13 +614,21 @@ pupa_enter_rescue_mode (void)
|
|||
pupa_rescue_register_command ("module", pupa_rescue_cmd_module,
|
||||
"load an OS module");
|
||||
pupa_rescue_register_command ("root", pupa_rescue_cmd_root,
|
||||
"set a root device");
|
||||
"set the root device");
|
||||
pupa_rescue_register_command ("dump", pupa_rescue_cmd_dump,
|
||||
"dump memory");
|
||||
pupa_rescue_register_command ("prefix", pupa_rescue_cmd_prefix,
|
||||
"set the prefix");
|
||||
pupa_rescue_register_command ("insmod", pupa_rescue_cmd_insmod,
|
||||
"insert a module");
|
||||
pupa_rescue_register_command ("rmmod", pupa_rescue_cmd_rmmod,
|
||||
"remove a module");
|
||||
pupa_rescue_register_command ("lsmod", pupa_rescue_cmd_lsmod,
|
||||
"show loaded modules");
|
||||
|
||||
while (1)
|
||||
{
|
||||
char *line = buf;
|
||||
char *line = linebuf;
|
||||
char *name;
|
||||
int n;
|
||||
pupa_rescue_command_t cmd;
|
||||
|
|
|
|||
Loading…
Add table
Add a link
Reference in a new issue