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authorAndreas Bießmann <andreas@biessmann.de>2012-02-24 08:23:53 +0100
committerRusty Russell <rusty@rustcorp.com.au>2012-02-27 10:29:31 +1030
commitdd2a3acaecd7abb2d43b09a823cf2e4c967fa2ac (patch)
treedf29f8479dedda8939f680998aa857e4ebd1d176 /scripts
parent203738e548cefc3fc3c2f73a9063176c9f3583d5 (diff)
downloadlinux-linaro-stable-dd2a3acaecd7abb2d43b09a823cf2e4c967fa2ac.tar.gz
mod/file2alias: make modpost compile on darwin again
commit e49ce14150c64b29a8dd211df785576fa19a9858 breaks cross compiling the linux kernel on darwin hosts. This fix introduce some minimal glue to adopt linker section handling for darwin hosts. Signed-off-by: Andreas Bießmann <andreas@biessmann.de> CC: Rusty Russell <rusty@rustcorp.com.au> CC: Greg Kroah-Hartman <gregkh@linuxfoundation.org> CC: Jochen Friedrich <jochen@scram.de> CC: Samuel Ortiz <sameo@linux.intel.com> CC: "K. Y. Srinivasan" <kys@microsoft.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Tested-by: Bernhard Walle <bernhard@bwalle.de>
Diffstat (limited to 'scripts')
-rw-r--r--scripts/mod/file2alias.c35
1 files changed, 31 insertions, 4 deletions
diff --git a/scripts/mod/file2alias.c b/scripts/mod/file2alias.c
index d0de2a2c3a2d..b89efe6e4c85 100644
--- a/scripts/mod/file2alias.c
+++ b/scripts/mod/file2alias.c
@@ -46,11 +46,37 @@ struct devtable {
void *function;
};
+#define ___cat(a,b) a ## b
+#define __cat(a,b) ___cat(a,b)
+
+/* we need some special handling for this host tool running eventually on
+ * Darwin. The Mach-O section handling is a bit different than ELF section
+ * handling. The differnces in detail are:
+ * a) we have segments which have sections
+ * b) we need a API call to get the respective section symbols */
+#if defined(__MACH__)
+#include <mach-o/getsect.h>
+
+#define INIT_SECTION(name) do { \
+ unsigned long name ## _len; \
+ char *__cat(pstart_,name) = getsectdata("__TEXT", \
+ #name, &__cat(name,_len)); \
+ char *__cat(pstop_,name) = __cat(pstart_,name) + \
+ __cat(name, _len); \
+ __cat(__start_,name) = (void *)__cat(pstart_,name); \
+ __cat(__stop_,name) = (void *)__cat(pstop_,name); \
+ } while (0)
+#define SECTION(name) __attribute__((section("__TEXT, " #name)))
+
+struct devtable **__start___devtable, **__stop___devtable;
+#else
+#define INIT_SECTION(name) /* no-op for ELF */
+#define SECTION(name) __attribute__((section(#name)))
+
/* We construct a table of pointers in an ELF section (pointers generally
* go unpadded by gcc). ld creates boundary syms for us. */
extern struct devtable *__start___devtable[], *__stop___devtable[];
-#define ___cat(a,b) a ## b
-#define __cat(a,b) ___cat(a,b)
+#endif /* __MACH__ */
#if __GNUC__ == 3 && __GNUC_MINOR__ < 3
# define __used __attribute__((__unused__))
@@ -65,8 +91,8 @@ extern struct devtable *__start___devtable[], *__stop___devtable[];
(type *)NULL, \
(char *)NULL)), \
sizeof(type), (function) }; \
- static struct devtable *__attribute__((section("__devtable"))) \
- __used __cat(devtable_ptr,__LINE__) = &__cat(devtable,__LINE__)
+ static struct devtable *SECTION(__devtable) __used \
+ __cat(devtable_ptr,__LINE__) = &__cat(devtable,__LINE__)
#define ADD(str, sep, cond, field) \
do { \
@@ -1080,6 +1106,7 @@ void handle_moddevtable(struct module *mod, struct elf_info *info,
do_pnp_card_entries(symval, sym->st_size, mod);
else {
struct devtable **p;
+ INIT_SECTION(__devtable);
for (p = __start___devtable; p < __stop___devtable; p++) {
if (sym_is(name, namelen, (*p)->device_id)) {