Chameleon

Chameleon Commit Details

Date:2010-02-23 03:20:16 (14 years 1 month ago)
Author:Rekursor
Commit:112
Parents: 111
Message:restricted access to smbios tables orig new and cache construction, avoided recursive calls on smbios table find functions.
Changes:
M/trunk/i386/libsaio/smbios_patcher.c
M/trunk/i386/libsaio/smbios_patcher.h
M/trunk/i386/libsaio/fake_efi.c

File differences

trunk/i386/libsaio/smbios_patcher.c
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}␊
␊
/** Compute necessary space requirements for new smbios */␊
struct SMBEntryPoint *smbios_dry_run(struct SMBEntryPoint *origsmbios)␊
static struct SMBEntryPoint *smbios_dry_run(struct SMBEntryPoint *origsmbios)␊
{␊
␉struct SMBEntryPoint␉*ret;␊
␉char␉␉␉*smbiostables;␊
* struct has been created by smbios_dry_run, update each table struct content of new smbios␊
* int the new allocated table address of size newsmbios->tablelength.␊
*/␊
void smbios_real_run(struct SMBEntryPoint * origsmbios, struct SMBEntryPoint * newsmbios)␊
static void smbios_real_run(struct SMBEntryPoint * origsmbios, struct SMBEntryPoint * newsmbios)␊
{␊
␉char *smbiostables;␊
␉char *tablesptr, *newtablesptr;␊
{␊
static struct SMBEntryPoint *orig = NULL; // cached␊
static struct SMBEntryPoint *patched = NULL; // cached␊
␊
␉if (orig == NULL) orig = getAddressOfSmbiosTable();␊
␊
␉switch (which) {␊
␉case SMBIOS_ORIGINAL:␊
return orig;␊
␉case SMBIOS_PATCHED:␊
if (patched == NULL) {␊
if (orig==NULL) orig = getAddressOfSmbiosTable();␊
patched = smbios_dry_run(orig);␊
smbios_real_run(orig, patched);␊
}␊
return patched;␊
␉default:␊
printf("ERROR: invalid option for getSmbios() !!\n");␊
return NULL;␊
␉}␊
// whatever we are called with orig or new flag, initialize asap both structures␊
if (orig == NULL) orig = getAddressOfSmbiosTable();␊
if (patched == NULL) {␊
patched = smbios_dry_run(orig);␊
smbios_real_run(orig, patched);␊
}␊
␉␊
switch (which) {␊
case SMBIOS_ORIGINAL:␊
return orig;␊
case SMBIOS_PATCHED:␊
return patched;␊
default:␊
printf("ERROR: invalid option for getSmbios() !!\n");␊
return NULL;␊
}␊
}␊
␊
#define MAX_DMI_TABLES 64␊
static int current_pos=0;␊
static bool ftTablePairInit = true;␊
␊
/** Find first original dmi Table with a particular type */␊
struct DMIHeader* FindFirstDmiTableOfType(int type, int minlength)␊
{␊
if (ftTablePairInit)␊
return getSmbiosTableStructure(getSmbios(SMBIOS_ORIGINAL), ␊
type, minlength);␊
current_pos = 0;␊
return FindNextDmiTableOfType(type, minlength);␊
};␊
␊
/** Find next original dmi Table with a particular type */␊
struct DMIHeader* FindNextDmiTableOfType(int type, int minlength)␊
{␊
int i;␊
␊
for (i=current_pos; i < DmiTablePairCount; i++) {␊
if (type == DmiTablePair[i].type && ␊
DmiTablePair[i].dmi &&␊
DmiTablePair[i].dmi->length >= minlength ) {␊
current_pos = i+1;␊
return DmiTablePair[i].dmi;␊
}␊
}␊
return NULL; // not found␊
};␊
␊
/** ␊
* Get a table structure entry from a type specification and a smbios address␊
* return NULL if table is not found␊
*/␊
struct DMIHeader *getSmbiosTableStructure(struct SMBEntryPoint␉*smbios, int type, int min_length)␊
static void getSmbiosTableStructure(struct SMBEntryPoint␉*smbios, int type, int min_length)␊
{␊
struct DMIHeader * dmihdr=NULL;␊
SMBByte* p;␊
int i;␊
␊
if (!ftTablePairInit) {␊
return FindFirstDmiTableOfType(type, min_length);␊
} else {␊
if (ftTablePairInit) {␊
ftTablePairInit = false;␊
bzero(DmiTablePair, sizeof(DmiTablePair));␊
␊
if (smbios == NULL || type < 0 ) return NULL;␊
if (smbios == NULL || type < 0 ) return;␊
#if DEBUG_SMBIOS␊
printf(">>> SMBIOSAddr=0x%08x\n", smbios);␊
printf(">>> DMI: addr=0x%08x, len=%d, count=%d\n", smbios->dmi.tableAddress, ␊
␉}␊
␊
}␊
return FindFirstDmiTableOfType(type, min_length);␊
}␊
␊
/** Find first new dmi Table with a particular type */␊
struct DMIHeader* FindFirstDmiTableOfType(int type, int minlength)␊
{␊
if (ftTablePairInit)␊
getSmbiosTableStructure(getSmbios(SMBIOS_PATCHED), ␊
type, minlength);␊
current_pos = 0;␊
return FindNextDmiTableOfType(type, minlength);␊
};␊
␊
/** Find next new dmi Table with a particular type */␊
struct DMIHeader* FindNextDmiTableOfType(int type, int minlength)␊
{␊
int i;␊
␊
for (i=current_pos; i < DmiTablePairCount; i++) {␊
if (type == DmiTablePair[i].type && ␊
DmiTablePair[i].dmi &&␊
DmiTablePair[i].dmi->length >= minlength ) {␊
current_pos = i+1;␊
return DmiTablePair[i].dmi;␊
}␊
}␊
return NULL; // not found␊
};␊
␊
trunk/i386/libsaio/smbios_patcher.h
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/** call with flag SMBIOS_ORIGINAL to get orig. entrypoint␊
or call with flag SMBIOS_PATCHED to get patched smbios entrypoint␊
*/␊
extern struct DMIHeader *getSmbiosTableStructure(struct SMBEntryPoint␉*smbios, int type, int min_length);␊
extern struct SMBEntryPoint␉*getSmbios(int);␊
extern struct DMIHeader* FindNextDmiTableOfType(int type, int minlen);␊
extern struct DMIHeader* FindFirstDmiTableOfType(int type, int minlen);␊
trunk/i386/libsaio/fake_efi.c
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␉smbios = getSmbios(SMBIOS_PATCHED);␉/* checks for _SM_ anchor and table header checksum */␊
␉if (smbios==NULL) return 0; // getSmbios() return a non null value if smbios is found␊
␊
␉p = (SMBByte *) getSmbiosTableStructure(smbios, 1, 0x19); /* Type 1: (3.3.2) System Information */␊
␉p = (SMBByte*) FindFirstDmiTableOfType(1, 0x19); /* Type 1: (3.3.2) System Information */␊
␉if (p==NULL) return NULL;␊
␊
␉verbose("Found SMBIOS System Information Table 1\n");␊

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Revision: 112