* atsym = *driver, *_template, *_sht, *_ops, *_probe, *probe_one, *_console
*
* Pattern 3:
- * Whitelist all references from .pci_fixup* section to .init.text
- * This is part of the PCI init when built-in
- *
- * Pattern 4:
* Whitelist all refereces from .text.head to .init.data
* Whitelist all refereces from .text.head to .init.text
*
- * Pattern 5:
+ * Pattern 4:
* Some symbols belong to init section but still it is ok to reference
* these from non-init sections as these symbols don't have any memory
* allocated for them and symbol address and value are same. So even
* This pattern is identified by
* refsymname = __init_begin, _sinittext, _einittext
*
- * Pattern 7:
- * Logos used in drivers/video/logo reside in __initdata but the
- * funtion that references them are EXPORT_SYMBOL() so cannot be
- * marker __init. So we whitelist them here.
- * The pattern is:
- * tosec = .init.data
- * fromsec = .text*
- * refsymname = logo_
- *
- * Pattern 8:
- * Symbols contained in .paravirtprobe may safely reference .init.text.
- * The pattern is:
- * tosec = .init.text
- * fromsec = .paravirtprobe
- *
- * Pattern 10:
- * ia64 has machvec table for each platform and
- * powerpc has a machine desc table for each platform.
- * It is mixture of function pointers of .init.text and .text.
- * fromsec = .machvec | .machine.desc
**/
static int secref_whitelist(const char *modname, const char *tosec,
const char *fromsec, const char *atsym,
"_probe",
"_probe_one",
"_console",
- "apic_es7000",
NULL
};
return 1;
/* Check for pattern 3 */
- if ((strncmp(fromsec, ".pci_fixup", strlen(".pci_fixup")) == 0) &&
- (strcmp(tosec, ".init.text") == 0))
- return 1;
-
- /* Check for pattern 4 */
if ((strcmp(fromsec, ".text.head") == 0) &&
((strcmp(tosec, ".init.data") == 0) ||
(strcmp(tosec, ".init.text") == 0)))
return 1;
- /* Check for pattern 5 */
+ /* Check for pattern 4 */
for (s = pat3refsym; *s; s++)
if (strcmp(refsymname, *s) == 0)
return 1;
- /* Check for pattern 7 */
- if ((strcmp(tosec, ".init.data") == 0) &&
- (strncmp(fromsec, ".text", strlen(".text")) == 0) &&
- (strncmp(refsymname, "logo_", strlen("logo_")) == 0))
- return 1;
-
- /* Check for pattern 8 */
- if ((strcmp(tosec, ".init.text") == 0) &&
- (strcmp(fromsec, ".paravirtprobe") == 0))
- return 1;
-
- /* Check for pattern 10 */
- if ((strcmp(fromsec, ".machvec") == 0) ||
- (strcmp(fromsec, ".machine.desc") == 0))
- return 1;
-
return 0;
}
elf->strtab + before->st_name, refsymname))
return;
- /* fromsec whitelist - without a valid 'before'
- * powerpc has a GOT table in .got2 section */
- if (strcmp(fromsec, ".got2") == 0)
- return;
-
if (before && after) {
warn("%s(%s+0x%llx): Section mismatch: reference to %s:%s "
"(between '%s' and '%s')\n",
}
}
+/*
+ * Identify sections from which references to either a
+ * .init or a .exit section is OK.
+ *
+ * [OPD] Keith Ownes <kaos@sgi.com> commented:
+ * For our future {in}sanity, add a comment that this is the ppc .opd
+ * section, not the ia64 .opd section.
+ * ia64 .opd should not point to discarded sections.
+ * [.rodata] like for .init.text we ignore .rodata references -same reason
+ */
+static int initexit_section_ref_ok(const char *name)
+{
+ const char **s;
+ /* Absolute section names */
+ const char *namelist1[] = {
+ "__bug_table", /* used by powerpc for BUG() */
+ "__ex_table",
+ ".altinstructions",
+ ".cranges", /* used by sh64 */
+ ".fixup",
+ ".machvec", /* ia64 + powerpc uses these */
+ ".machine.desc",
+ ".opd", /* See comment [OPD] */
+ ".parainstructions",
+ ".pdr",
+ ".plt", /* seen on ARCH=um build on x86_64. Harmless */
+ ".smp_locks",
+ ".stab",
+ NULL
+ };
+ /* Start of section names */
+ const char *namelist2[] = {
+ ".debug",
+ ".eh_frame",
+ ".note", /* ignore ELF notes - may contain anything */
+ ".got", /* powerpc - global offset table */
+ ".toc", /* powerpc - table of contents */
+ NULL
+ };
+ /* part of section name */
+ const char *namelist3 [] = {
+ ".unwind", /* Sample: IA_64.unwind.exit.text */
+ NULL
+ };
+
+ for (s = namelist1; *s; s++)
+ if (strcmp(*s, name) == 0)
+ return 1;
+ for (s = namelist2; *s; s++)
+ if (strncmp(*s, name, strlen(*s)) == 0)
+ return 1;
+ for (s = namelist3; *s; s++)
+ if (strstr(name, *s) != NULL)
+ return 1;
+ return 0;
+}
+
/**
* Functions used only during module init is marked __init and is stored in
* a .init.text section. Likewise data is marked __initdata and stored in
return 0;
}
-/**
+/*
* Identify sections from which references to a .init section is OK.
*
* Unfortunately references to read only data that referenced .init
*
* where vgacon_startup is __init. If you want to wade through the false
* positives, take out the check for rodata.
- **/
+ */
static int init_section_ref_ok(const char *name)
{
const char **s;
/* Absolute section names */
const char *namelist1[] = {
- ".init",
- ".opd", /* see comment [OPD] at exit_section_ref_ok() */
- ".toc1", /* used by ppc64 */
- ".stab",
- ".data.rel.ro", /* used by parisc64 */
- ".parainstructions",
- ".text.lock",
- "__bug_table", /* used by powerpc for BUG() */
- ".pci_fixup_header",
- ".pci_fixup_final",
- ".pdr",
- "__param",
- "__ex_table",
- ".fixup",
- ".smp_locks",
- ".plt", /* seen on ARCH=um build on x86_64. Harmless */
"__ftr_fixup", /* powerpc cpu feature fixup */
"__fw_ftr_fixup", /* powerpc firmware feature fixup */
- ".cranges", /* used by sh64 */
+ "__param",
+ ".data.rel.ro", /* used by parisc64 */
+ ".init",
+ ".text.lock",
NULL
};
/* Start of section names */
const char *namelist2[] = {
".init.",
- ".altinstructions",
- ".eh_frame",
- ".debug",
- ".parainstructions",
+ ".pci_fixup",
".rodata",
NULL
};
- /* part of section name */
- const char *namelist3 [] = {
- ".unwind", /* sample: IA_64.unwind.init.text */
- NULL
- };
+
+ if (initexit_section_ref_ok(name))
+ return 1;
for (s = namelist1; *s; s++)
if (strcmp(*s, name) == 0)
for (s = namelist2; *s; s++)
if (strncmp(*s, name, strlen(*s)) == 0)
return 1;
- for (s = namelist3; *s; s++)
- if (strstr(name, *s) != NULL)
- return 1;
+
+ /* If section name ends with ".init" we allow references
+ * as is the case with .initcallN.init, .early_param.init, .taglist.init etc
+ */
if (strrcmp(name, ".init") == 0)
return 1;
return 0;
/*
* Identify sections from which references to a .exit section is OK.
- *
- * [OPD] Keith Ownes <kaos@sgi.com> commented:
- * For our future {in}sanity, add a comment that this is the ppc .opd
- * section, not the ia64 .opd section.
- * ia64 .opd should not point to discarded sections.
- * [.rodata] like for .init.text we ignore .rodata references -same reason
- **/
+ */
static int exit_section_ref_ok(const char *name)
{
const char **s;
/* Absolute section names */
const char *namelist1[] = {
- ".exit.text",
".exit.data",
- ".init.text",
- ".rodata",
- ".opd", /* See comment [OPD] */
- ".toc1", /* used by ppc64 */
- ".altinstructions",
- ".pdr",
- "__bug_table", /* used by powerpc for BUG() */
+ ".exit.text",
".exitcall.exit",
- ".eh_frame",
- ".parainstructions",
- ".stab",
- "__ex_table",
- ".fixup",
- ".smp_locks",
- ".plt", /* seen on ARCH=um build on x86_64. Harmless */
- ".cranges", /* used by sh64 */
- NULL
- };
- /* Start of section names */
- const char *namelist2[] = {
- ".debug",
- NULL
- };
- /* part of section name */
- const char *namelist3 [] = {
- ".unwind", /* Sample: IA_64.unwind.exit.text */
+ ".rodata",
NULL
};
+ if (initexit_section_ref_ok(name))
+ return 1;
+
for (s = namelist1; *s; s++)
if (strcmp(*s, name) == 0)
return 1;
- for (s = namelist2; *s; s++)
- if (strncmp(*s, name, strlen(*s)) == 0)
- return 1;
- for (s = namelist3; *s; s++)
- if (strstr(name, *s) != NULL)
- return 1;
return 0;
}
projects / firefly-linux-kernel-4.4.55.git / blobdiff