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grub/grub-core/commands/acpi.c
Michael Chang acffb81485 build: Fix -Werror=array-bounds array subscript 0 is outside array bounds 
The GRUB is failing to build with GCC-12 in many places like this:

  In function 'init_cbfsdisk',
      inlined from 'grub_mod_init' at ../../grub-core/fs/cbfs.c:391:3:
  ../../grub-core/fs/cbfs.c:345:7: error: array subscript 0 is outside array bounds of 'grub_uint32_t[0]' {aka 'unsigned int[]'} [-Werror=array-bounds]
    345 |   ptr = *(grub_uint32_t *) 0xfffffffc;
        |   ~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

This is caused by GCC regression in 11/12 [1]. In a nut shell, the
warning is about detected invalid accesses at non-zero offsets to NULL
pointers. Since hardwired constant address is treated as NULL plus an
offset in the same underlying code, the warning is therefore triggered.

Instead of inserting #pragma all over the places where literal pointers
are accessed to avoid diagnosing array-bounds, we can try to borrow the
idea from Linux kernel that the absolute_pointer() macro [2][3] is used
to disconnect a pointer using literal address from it's original object,
hence GCC won't be able to make assumptions on the boundary while doing
pointer arithmetic. With that we can greatly reduce the code we have to
cover up by making initial literal pointer assignment to use the new
wrapper but not having to track everywhere literal pointers are
accessed. This also makes code looks cleaner.

Please note the grub_absolute_pointer() macro requires to be invoked in
a function as long as it is compound expression. Some global variables
with literal pointers has been changed to local ones in order to use
grub_absolute_pointer() to initialize it. The shuffling is basically done
in a selective and careful way that the variable's scope doesn't matter
being local or global, for example, the global variable must not get
modified at run time throughout. For the record, here's the list of
global variables got shuffled in this patch:

  grub-core/commands/i386/pc/drivemap.c:int13slot
  grub-core/term/i386/pc/console.c:bios_data_area
  grub-core/term/ns8250.c:serial_hw_io_addr

[1] https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99578
[2] https://elixir.bootlin.com/linux/v5.16.14/source/include/linux/compiler.h#L180
[3] https://elixir.bootlin.com/linux/v5.16.14/source/include/linux/compiler-gcc.h#L31

Signed-off-by: Michael Chang <mchang@suse.com>
Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
2022-04-20 18:27:52 +02:00

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/* acpi.c - modify acpi tables. */
/*
* GRUB -- GRand Unified Bootloader
* Copyright (C) 2009 Free Software Foundation, Inc.
*
* GRUB is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* GRUB is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with GRUB. If not, see <http://www.gnu.org/licenses/>.
*/
#include <grub/dl.h>
#include <grub/extcmd.h>
#include <grub/file.h>
#include <grub/disk.h>
#include <grub/term.h>
#include <grub/misc.h>
#include <grub/acpi.h>
#include <grub/mm.h>
#include <grub/memory.h>
#include <grub/i18n.h>
#include <grub/lockdown.h>
#ifdef GRUB_MACHINE_EFI
#include <grub/efi/efi.h>
#include <grub/efi/api.h>
#endif
#pragma GCC diagnostic ignored "-Wcast-align"
GRUB_MOD_LICENSE ("GPLv3+");
static const struct grub_arg_option options[] = {
{"exclude", 'x', 0,
N_("Don't load host tables specified by comma-separated list."),
0, ARG_TYPE_STRING},
{"load-only", 'n', 0,
N_("Load only tables specified by comma-separated list."), 0, ARG_TYPE_STRING},
{"v1", '1', 0, N_("Export version 1 tables to the OS."), 0, ARG_TYPE_NONE},
{"v2", '2', 0, N_("Export version 2 and version 3 tables to the OS."), 0, ARG_TYPE_NONE},
{"oemid", 'o', 0, N_("Set OEMID of RSDP, XSDT and RSDT."), 0, ARG_TYPE_STRING},
{"oemtable", 't', 0,
N_("Set OEMTABLE ID of RSDP, XSDT and RSDT."), 0, ARG_TYPE_STRING},
{"oemtablerev", 'r', 0,
N_("Set OEMTABLE revision of RSDP, XSDT and RSDT."), 0, ARG_TYPE_INT},
{"oemtablecreator", 'c', 0,
N_("Set creator field of RSDP, XSDT and RSDT."), 0, ARG_TYPE_STRING},
{"oemtablecreatorrev", 'd', 0,
N_("Set creator revision of RSDP, XSDT and RSDT."), 0, ARG_TYPE_INT},
/* TRANSLATORS: "hangs" here is a noun, not a verb. */
{"no-ebda", 'e', 0, N_("Don't update EBDA. May fix failures or hangs on some "
"BIOSes but makes it ineffective with OS not receiving RSDP from GRUB."),
0, ARG_TYPE_NONE},
{0, 0, 0, 0, 0, 0}
};
/* rev1 is 1 if ACPIv1 is to be generated, 0 otherwise.
rev2 contains the revision of ACPIv2+ to generate or 0 if none. */
static int rev1, rev2;
/* OEMID of RSDP, RSDT and XSDT. */
static char root_oemid[6];
/* OEMTABLE of the same tables. */
static char root_oemtable[8];
/* OEMREVISION of the same tables. */
static grub_uint32_t root_oemrev;
/* CreatorID of the same tables. */
static char root_creator_id[4];
/* CreatorRevision of the same tables. */
static grub_uint32_t root_creator_rev;
static struct grub_acpi_rsdp_v10 *rsdpv1_new = 0;
static struct grub_acpi_rsdp_v20 *rsdpv2_new = 0;
static char *playground = 0, *playground_ptr = 0;
static int playground_size = 0;
/* Linked list of ACPI tables. */
struct efiemu_acpi_table
{
void *addr;
grub_size_t size;
struct efiemu_acpi_table *next;
};
static struct efiemu_acpi_table *acpi_tables = 0;
/* DSDT isn't in RSDT. So treat it specially. */
static void *table_dsdt = 0;
/* Pointer to recreated RSDT. */
static void *rsdt_addr = 0;
/* Allocation handles for different tables. */
static grub_size_t dsdt_size = 0;
/* Address of original FACS. */
static grub_uint32_t facs_addr = 0;
struct grub_acpi_rsdp_v20 *
grub_acpi_get_rsdpv2 (void)
{
if (rsdpv2_new)
return rsdpv2_new;
if (rsdpv1_new)
return 0;
return grub_machine_acpi_get_rsdpv2 ();
}
struct grub_acpi_rsdp_v10 *
grub_acpi_get_rsdpv1 (void)
{
if (rsdpv1_new)
return rsdpv1_new;
if (rsdpv2_new)
return 0;
return grub_machine_acpi_get_rsdpv1 ();
}
#if defined (__i386__) || defined (__x86_64__)
static inline int
iszero (grub_uint8_t *reg, int size)
{
int i;
for (i = 0; i < size; i++)
if (reg[i])
return 0;
return 1;
}
/* Context for grub_acpi_create_ebda. */
struct grub_acpi_create_ebda_ctx {
int ebda_len;
grub_uint64_t highestlow;
};
/* Helper for grub_acpi_create_ebda. */
static int
find_hook (grub_uint64_t start, grub_uint64_t size, grub_memory_type_t type,
void *data)
{
struct grub_acpi_create_ebda_ctx *ctx = data;
grub_uint64_t end = start + size;
if (type != GRUB_MEMORY_AVAILABLE)
return 0;
if (end > 0x100000)
end = 0x100000;
if (end > start + ctx->ebda_len
&& ctx->highestlow < ((end - ctx->ebda_len) & (~0xf)) )
ctx->highestlow = (end - ctx->ebda_len) & (~0xf);
return 0;
}
grub_err_t
grub_acpi_create_ebda (void)
{
struct grub_acpi_create_ebda_ctx ctx = {
.highestlow = 0
};
int ebda_kb_len = 0;
int mmapregion = 0;
grub_uint8_t *ebda, *v1inebda = 0, *v2inebda = 0;
grub_uint8_t *targetebda, *target;
struct grub_acpi_rsdp_v10 *v1;
struct grub_acpi_rsdp_v20 *v2;
ebda = (grub_uint8_t *) (grub_addr_t) ((*((grub_uint16_t *) grub_absolute_pointer (0x40e))) << 4);
grub_dprintf ("acpi", "EBDA @%p\n", ebda);
if (ebda)
ebda_kb_len = *(grub_uint16_t *) ebda;
grub_dprintf ("acpi", "EBDA length 0x%x\n", ebda_kb_len);
if (ebda_kb_len > 16)
ebda_kb_len = 0;
ctx.ebda_len = (ebda_kb_len + 1) << 10;
/* FIXME: use low-memory mm allocation once it's available. */
grub_mmap_iterate (find_hook, &ctx);
targetebda = (grub_uint8_t *) (grub_addr_t) ctx.highestlow;
grub_dprintf ("acpi", "creating ebda @%llx\n",
(unsigned long long) ctx.highestlow);
if (! ctx.highestlow)
return grub_error (GRUB_ERR_OUT_OF_MEMORY,
"couldn't find space for the new EBDA");
mmapregion = grub_mmap_register ((grub_addr_t) targetebda, ctx.ebda_len,
GRUB_MEMORY_RESERVED);
if (! mmapregion)
return grub_errno;
/* XXX: EBDA is unstandardized, so this implementation is heuristical. */
if (ebda_kb_len)
grub_memcpy (targetebda, ebda, 0x400);
else
grub_memset (targetebda, 0, 0x400);
*((grub_uint16_t *) targetebda) = ebda_kb_len + 1;
target = targetebda;
v1 = grub_acpi_get_rsdpv1 ();
v2 = grub_acpi_get_rsdpv2 ();
if (v2 && v2->length > 40)
v2 = 0;
/* First try to replace already existing rsdp. */
if (v2)
{
grub_dprintf ("acpi", "Scanning EBDA for old rsdpv2\n");
for (; target < targetebda + 0x400 - v2->length; target += 0x10)
if (grub_memcmp (target, GRUB_RSDP_SIGNATURE, GRUB_RSDP_SIGNATURE_SIZE) == 0
&& grub_byte_checksum (target,
sizeof (struct grub_acpi_rsdp_v10)) == 0
&& ((struct grub_acpi_rsdp_v10 *) target)->revision != 0
&& ((struct grub_acpi_rsdp_v20 *) target)->length <= v2->length)
{
grub_memcpy (target, v2, v2->length);
grub_dprintf ("acpi", "Copying rsdpv2 to %p\n", target);
v2inebda = target;
target += v2->length;
target = (grub_uint8_t *) ALIGN_UP((grub_addr_t) target, 16);
v2 = 0;
break;
}
}
if (v1)
{
grub_dprintf ("acpi", "Scanning EBDA for old rsdpv1\n");
for (; target < targetebda + 0x400 - sizeof (struct grub_acpi_rsdp_v10);
target += 0x10)
if (grub_memcmp (target, GRUB_RSDP_SIGNATURE, GRUB_RSDP_SIGNATURE_SIZE) == 0
&& grub_byte_checksum (target,
sizeof (struct grub_acpi_rsdp_v10)) == 0)
{
grub_memcpy (target, v1, sizeof (struct grub_acpi_rsdp_v10));
grub_dprintf ("acpi", "Copying rsdpv1 to %p\n", target);
v1inebda = target;
target += sizeof (struct grub_acpi_rsdp_v10);
target = (grub_uint8_t *) ALIGN_UP((grub_addr_t) target, 16);
v1 = 0;
break;
}
}
target = targetebda + 0x100;
/* Try contiguous zeros. */
if (v2)
{
grub_dprintf ("acpi", "Scanning EBDA for block of zeros\n");
for (; target < targetebda + 0x400 - v2->length; target += 0x10)
if (iszero (target, v2->length))
{
grub_dprintf ("acpi", "Copying rsdpv2 to %p\n", target);
grub_memcpy (target, v2, v2->length);
v2inebda = target;
target += v2->length;
target = (grub_uint8_t *) ALIGN_UP((grub_addr_t) target, 16);
v2 = 0;
break;
}
}
if (v1)
{
grub_dprintf ("acpi", "Scanning EBDA for block of zeros\n");
for (; target < targetebda + 0x400 - sizeof (struct grub_acpi_rsdp_v10);
target += 0x10)
if (iszero (target, sizeof (struct grub_acpi_rsdp_v10)))
{
grub_dprintf ("acpi", "Copying rsdpv1 to %p\n", target);
grub_memcpy (target, v1, sizeof (struct grub_acpi_rsdp_v10));
v1inebda = target;
target += sizeof (struct grub_acpi_rsdp_v10);
target = (grub_uint8_t *) ALIGN_UP((grub_addr_t) target, 16);
v1 = 0;
break;
}
}
if (v1 || v2)
{
grub_mmap_unregister (mmapregion);
return grub_error (GRUB_ERR_OUT_OF_MEMORY,
"couldn't find suitable spot in EBDA");
}
/* Remove any other RSDT. */
for (target = targetebda;
target < targetebda + 0x400 - sizeof (struct grub_acpi_rsdp_v10);
target += 0x10)
if (grub_memcmp (target, GRUB_RSDP_SIGNATURE, GRUB_RSDP_SIGNATURE_SIZE) == 0
&& grub_byte_checksum (target,
sizeof (struct grub_acpi_rsdp_v10)) == 0
&& target != v1inebda && target != v2inebda)
*target = 0;
grub_dprintf ("acpi", "Switching EBDA\n");
(*((grub_uint16_t *) grub_absolute_pointer (0x40e))) = ((grub_addr_t) targetebda) >> 4;
grub_dprintf ("acpi", "EBDA switched\n");
return GRUB_ERR_NONE;
}
#endif
/* Create tables common to ACPIv1 and ACPIv2+ */
static void
setup_common_tables (void)
{
struct efiemu_acpi_table *cur;
struct grub_acpi_table_header *rsdt;
grub_uint32_t *rsdt_entry;
int numoftables;
/* Treat DSDT. */
grub_memcpy (playground_ptr, table_dsdt, dsdt_size);
grub_free (table_dsdt);
table_dsdt = playground_ptr;
playground_ptr += dsdt_size;
/* Treat other tables. */
for (cur = acpi_tables; cur; cur = cur->next)
{
struct grub_acpi_fadt *fadt;
grub_memcpy (playground_ptr, cur->addr, cur->size);
grub_free (cur->addr);
cur->addr = playground_ptr;
playground_ptr += cur->size;
/* If it's FADT correct DSDT and FACS addresses. */
fadt = (struct grub_acpi_fadt *) cur->addr;
if (grub_memcmp (fadt->hdr.signature, GRUB_ACPI_FADT_SIGNATURE,
sizeof (fadt->hdr.signature)) == 0)
{
fadt->dsdt_addr = (grub_addr_t) table_dsdt;
fadt->facs_addr = facs_addr;
/* Does a revision 2 exist at all? */
if (fadt->hdr.revision >= 3)
{
fadt->dsdt_xaddr = (grub_addr_t) table_dsdt;
fadt->facs_xaddr = facs_addr;
}
/* Recompute checksum. */
fadt->hdr.checksum = 0;
fadt->hdr.checksum = 1 + ~grub_byte_checksum (fadt, fadt->hdr.length);
}
}
/* Fill RSDT entries. */
numoftables = 0;
for (cur = acpi_tables; cur; cur = cur->next)
numoftables++;
rsdt_addr = rsdt = (struct grub_acpi_table_header *) playground_ptr;
playground_ptr += sizeof (struct grub_acpi_table_header) + sizeof (grub_uint32_t) * numoftables;
rsdt_entry = (grub_uint32_t *) (rsdt + 1);
/* Fill RSDT header. */
grub_memcpy (&(rsdt->signature), "RSDT", 4);
rsdt->length = sizeof (struct grub_acpi_table_header) + sizeof (grub_uint32_t) * numoftables;
rsdt->revision = 1;
grub_memcpy (&(rsdt->oemid), root_oemid, sizeof (rsdt->oemid));
grub_memcpy (&(rsdt->oemtable), root_oemtable, sizeof (rsdt->oemtable));
rsdt->oemrev = root_oemrev;
grub_memcpy (&(rsdt->creator_id), root_creator_id, sizeof (rsdt->creator_id));
rsdt->creator_rev = root_creator_rev;
for (cur = acpi_tables; cur; cur = cur->next)
*(rsdt_entry++) = (grub_addr_t) cur->addr;
/* Recompute checksum. */
rsdt->checksum = 0;
rsdt->checksum = 1 + ~grub_byte_checksum (rsdt, rsdt->length);
}
/* Regenerate ACPIv1 RSDP */
static void
setv1table (void)
{
/* Create RSDP. */
rsdpv1_new = (struct grub_acpi_rsdp_v10 *) playground_ptr;
playground_ptr += sizeof (struct grub_acpi_rsdp_v10);
grub_memcpy (&(rsdpv1_new->signature), GRUB_RSDP_SIGNATURE,
sizeof (rsdpv1_new->signature));
grub_memcpy (&(rsdpv1_new->oemid), root_oemid, sizeof (rsdpv1_new->oemid));
rsdpv1_new->revision = 0;
rsdpv1_new->rsdt_addr = (grub_addr_t) rsdt_addr;
rsdpv1_new->checksum = 0;
rsdpv1_new->checksum = 1 + ~grub_byte_checksum (rsdpv1_new,
sizeof (*rsdpv1_new));
grub_dprintf ("acpi", "Generated ACPIv1 tables\n");
}
static void
setv2table (void)
{
struct grub_acpi_table_header *xsdt;
struct efiemu_acpi_table *cur;
grub_uint64_t *xsdt_entry;
int numoftables;
numoftables = 0;
for (cur = acpi_tables; cur; cur = cur->next)
numoftables++;
/* Create XSDT. */
xsdt = (struct grub_acpi_table_header *) playground_ptr;
playground_ptr += sizeof (struct grub_acpi_table_header) + sizeof (grub_uint64_t) * numoftables;
xsdt_entry = (grub_uint64_t *)(xsdt + 1);
for (cur = acpi_tables; cur; cur = cur->next)
*(xsdt_entry++) = (grub_addr_t) cur->addr;
grub_memcpy (&(xsdt->signature), "XSDT", 4);
xsdt->length = sizeof (struct grub_acpi_table_header) + sizeof (grub_uint64_t) * numoftables;
xsdt->revision = 1;
grub_memcpy (&(xsdt->oemid), root_oemid, sizeof (xsdt->oemid));
grub_memcpy (&(xsdt->oemtable), root_oemtable, sizeof (xsdt->oemtable));
xsdt->oemrev = root_oemrev;
grub_memcpy (&(xsdt->creator_id), root_creator_id, sizeof (xsdt->creator_id));
xsdt->creator_rev = root_creator_rev;
xsdt->checksum = 0;
xsdt->checksum = 1 + ~grub_byte_checksum (xsdt, xsdt->length);
/* Create RSDPv2. */
rsdpv2_new = (struct grub_acpi_rsdp_v20 *) playground_ptr;
playground_ptr += sizeof (struct grub_acpi_rsdp_v20);
grub_memcpy (&(rsdpv2_new->rsdpv1.signature), GRUB_RSDP_SIGNATURE,
sizeof (rsdpv2_new->rsdpv1.signature));
grub_memcpy (&(rsdpv2_new->rsdpv1.oemid), root_oemid,
sizeof (rsdpv2_new->rsdpv1.oemid));
rsdpv2_new->rsdpv1.revision = rev2;
rsdpv2_new->rsdpv1.rsdt_addr = (grub_addr_t) rsdt_addr;
rsdpv2_new->rsdpv1.checksum = 0;
rsdpv2_new->rsdpv1.checksum = 1 + ~grub_byte_checksum
(&(rsdpv2_new->rsdpv1), sizeof (rsdpv2_new->rsdpv1));
rsdpv2_new->length = sizeof (*rsdpv2_new);
rsdpv2_new->xsdt_addr = (grub_addr_t) xsdt;
rsdpv2_new->checksum = 0;
rsdpv2_new->checksum = 1 + ~grub_byte_checksum (rsdpv2_new,
rsdpv2_new->length);
grub_dprintf ("acpi", "Generated ACPIv2 tables\n");
}
static void
free_tables (void)
{
struct efiemu_acpi_table *cur, *t;
if (table_dsdt)
grub_free (table_dsdt);
for (cur = acpi_tables; cur;)
{
t = cur;
grub_free (cur->addr);
cur = cur->next;
grub_free (t);
}
acpi_tables = 0;
table_dsdt = 0;
}
static grub_err_t
grub_cmd_acpi (struct grub_extcmd_context *ctxt, int argc, char **args)
{
struct grub_arg_list *state = ctxt->state;
struct grub_acpi_rsdp_v10 *rsdp;
struct efiemu_acpi_table *cur, *t;
int i, mmapregion;
int numoftables;
/* Default values if no RSDP is found. */
rev1 = 1;
rev2 = 3;
facs_addr = 0;
playground = playground_ptr = 0;
playground_size = 0;
rsdp = (struct grub_acpi_rsdp_v10 *) grub_machine_acpi_get_rsdpv2 ();
if (! rsdp)
rsdp = grub_machine_acpi_get_rsdpv1 ();
grub_dprintf ("acpi", "RSDP @%p\n", rsdp);
if (rsdp)
{
grub_uint32_t *entry_ptr;
char *exclude = 0;
char *load_only = 0;
char *ptr;
/* RSDT consists of header and an array of 32-bit pointers. */
struct grub_acpi_table_header *rsdt;
exclude = state[0].set ? grub_strdup (state[0].arg) : 0;
if (exclude)
{
for (ptr = exclude; *ptr; ptr++)
*ptr = grub_tolower (*ptr);
}
load_only = state[1].set ? grub_strdup (state[1].arg) : 0;
if (load_only)
{
for (ptr = load_only; *ptr; ptr++)
*ptr = grub_tolower (*ptr);
}
/* Set revision variables to replicate the same version as host. */
rev1 = ! rsdp->revision;
rev2 = rsdp->revision;
rsdt = (struct grub_acpi_table_header *) (grub_addr_t) rsdp->rsdt_addr;
/* Load host tables. */
for (entry_ptr = (grub_uint32_t *) (rsdt + 1);
entry_ptr < (grub_uint32_t *) (((grub_uint8_t *) rsdt)
+ rsdt->length);
entry_ptr++)
{
char signature[5];
struct efiemu_acpi_table *table;
struct grub_acpi_table_header *curtable
= (struct grub_acpi_table_header *) (grub_addr_t) *entry_ptr;
signature[4] = 0;
for (i = 0; i < 4;i++)
signature[i] = grub_tolower (curtable->signature[i]);
/* If it's FADT it contains addresses of DSDT and FACS. */
if (grub_strcmp (signature, "facp") == 0)
{
struct grub_acpi_table_header *dsdt;
struct grub_acpi_fadt *fadt = (struct grub_acpi_fadt *) curtable;
/* Set root header variables to the same values
as FADT by default. */
grub_memcpy (&root_oemid, &(fadt->hdr.oemid),
sizeof (root_oemid));
grub_memcpy (&root_oemtable, &(fadt->hdr.oemtable),
sizeof (root_oemtable));
root_oemrev = fadt->hdr.oemrev;
grub_memcpy (&root_creator_id, &(fadt->hdr.creator_id),
sizeof (root_creator_id));
root_creator_rev = fadt->hdr.creator_rev;
/* Load DSDT if not excluded. */
dsdt = (struct grub_acpi_table_header *)
(grub_addr_t) fadt->dsdt_addr;
if (dsdt && (! exclude || ! grub_strword (exclude, "dsdt"))
&& (! load_only || grub_strword (load_only, "dsdt"))
&& dsdt->length >= sizeof (*dsdt))
{
dsdt_size = dsdt->length;
table_dsdt = grub_malloc (dsdt->length);
if (! table_dsdt)
{
free_tables ();
grub_free (exclude);
grub_free (load_only);
return grub_errno;
}
grub_memcpy (table_dsdt, dsdt, dsdt->length);
}
/* Save FACS address. FACS shouldn't be overridden. */
facs_addr = fadt->facs_addr;
}
/* Skip excluded tables. */
if (exclude && grub_strword (exclude, signature))
continue;
if (load_only && ! grub_strword (load_only, signature))
continue;
/* Sanity check. */
if (curtable->length < sizeof (*curtable))
continue;
table = (struct efiemu_acpi_table *) grub_malloc
(sizeof (struct efiemu_acpi_table));
if (! table)
{
free_tables ();
grub_free (exclude);
grub_free (load_only);
return grub_errno;
}
table->size = curtable->length;
table->addr = grub_malloc (table->size);
playground_size += table->size;
if (! table->addr)
{
free_tables ();
grub_free (exclude);
grub_free (load_only);
grub_free (table);
return grub_errno;
}
table->next = acpi_tables;
acpi_tables = table;
grub_memcpy (table->addr, curtable, table->size);
}
grub_free (exclude);
grub_free (load_only);
}
/* Does user specify versions to generate? */
if (state[2].set || state[3].set)
{
rev1 = state[2].set;
if (state[3].set)
rev2 = rev2 ? : 2;
else
rev2 = 0;
}
/* Does user override root header information? */
if (state[4].set)
grub_strncpy (root_oemid, state[4].arg, sizeof (root_oemid));
if (state[5].set)
grub_strncpy (root_oemtable, state[5].arg, sizeof (root_oemtable));
if (state[6].set)
root_oemrev = grub_strtoul (state[6].arg, 0, 0);
if (state[7].set)
grub_strncpy (root_creator_id, state[7].arg, sizeof (root_creator_id));
if (state[8].set)
root_creator_rev = grub_strtoul (state[8].arg, 0, 0);
/* Load user tables */
for (i = 0; i < argc; i++)
{
grub_file_t file;
grub_size_t size;
char *buf;
file = grub_file_open (args[i], GRUB_FILE_TYPE_ACPI_TABLE);
if (! file)
{
free_tables ();
return grub_errno;
}
size = grub_file_size (file);
if (size < sizeof (struct grub_acpi_table_header))
{
grub_file_close (file);
free_tables ();
return grub_error (GRUB_ERR_BAD_OS, N_("premature end of file %s"),
args[i]);
}
buf = (char *) grub_malloc (size);
if (! buf)
{
grub_file_close (file);
free_tables ();
return grub_errno;
}
if (grub_file_read (file, buf, size) != (int) size)
{
grub_file_close (file);
free_tables ();
if (!grub_errno)
grub_error (GRUB_ERR_BAD_OS, N_("premature end of file %s"),
args[i]);
return grub_errno;
}
grub_file_close (file);
if (grub_memcmp (((struct grub_acpi_table_header *) buf)->signature,
"DSDT", 4) == 0)
{
grub_free (table_dsdt);
table_dsdt = buf;
dsdt_size = size;
}
else
{
struct efiemu_acpi_table *table;
table = (struct efiemu_acpi_table *) grub_malloc
(sizeof (struct efiemu_acpi_table));
if (! table)
{
free_tables ();
return grub_errno;
}
table->size = size;
table->addr = buf;
playground_size += table->size;
table->next = acpi_tables;
acpi_tables = table;
}
}
numoftables = 0;
for (cur = acpi_tables; cur; cur = cur->next)
numoftables++;
/* DSDT. */
playground_size += dsdt_size;
/* RSDT. */
playground_size += sizeof (struct grub_acpi_table_header) + sizeof (grub_uint32_t) * numoftables;
/* RSDPv1. */
playground_size += sizeof (struct grub_acpi_rsdp_v10);
/* XSDT. */
playground_size += sizeof (struct grub_acpi_table_header) + sizeof (grub_uint64_t) * numoftables;
/* RSDPv2. */
playground_size += sizeof (struct grub_acpi_rsdp_v20);
playground = playground_ptr
= grub_mmap_malign_and_register (1, playground_size, &mmapregion,
GRUB_MEMORY_ACPI, 0);
if (! playground)
{
free_tables ();
return grub_error (GRUB_ERR_OUT_OF_MEMORY,
"couldn't allocate space for ACPI tables");
}
setup_common_tables ();
/* Request space for RSDPv1. */
if (rev1)
setv1table ();
/* Request space for RSDPv2+ and XSDT. */
if (rev2)
setv2table ();
for (cur = acpi_tables; cur;)
{
t = cur;
cur = cur->next;
grub_free (t);
}
acpi_tables = 0;
#if defined (__i386__) || defined (__x86_64__)
if (! state[9].set)
{
grub_err_t err;
err = grub_acpi_create_ebda ();
if (err)
{
rsdpv1_new = 0;
rsdpv2_new = 0;
grub_mmap_free_and_unregister (mmapregion);
return err;
}
}
#endif
#ifdef GRUB_MACHINE_EFI
{
struct grub_efi_guid acpi = GRUB_EFI_ACPI_TABLE_GUID;
struct grub_efi_guid acpi20 = GRUB_EFI_ACPI_20_TABLE_GUID;
efi_call_2 (grub_efi_system_table->boot_services->install_configuration_table,
&acpi20, grub_acpi_get_rsdpv2 ());
efi_call_2 (grub_efi_system_table->boot_services->install_configuration_table,
&acpi, grub_acpi_get_rsdpv1 ());
}
#endif
return GRUB_ERR_NONE;
}
static grub_extcmd_t cmd;
GRUB_MOD_INIT(acpi)
{
cmd = grub_register_extcmd_lockdown ("acpi", grub_cmd_acpi, 0,
N_("[-1|-2] [--exclude=TABLE1,TABLE2|"
"--load-only=TABLE1,TABLE2] FILE1"
" [FILE2] [...]"),
N_("Load host ACPI tables and tables "
"specified by arguments."),
options);
}
GRUB_MOD_FINI(acpi)
{
grub_unregister_extcmd (cmd);
}
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