Hello. multiboot helpers have no real reason to stay in kernel. So here
is the proposition to move them out of it to _multiboot.mod.
Changelog:
2009-02-11 Vladimir Serbinenko <phco...@gmail.com>
Move multiboot helper out of kernel
* conf/i386-pc.rmk: Add loader/i386/multiboot.S to
_multiboot.mod
* conf/i386-coreboot.rmk: Likewise
* conf/i386-ieee1275.rmk: Likewise
* kern/i386/loader.S: Move multiboot helpers from here...
* loader/i386/multiboot.S: ...moved here
* include/grub/i386/loader.h: Move declarations of multiboot
helpers from here...
* include/grub/i386/multiboot.h: ...moved here
* loader/i386/pc/multiboot.c: Added include of
grub/cpu/multiboot.h
Thanks
Vladimir 'phcoder' Serbinenko
Index: conf/i386-pc.rmk
===================================================================
--- conf/i386-pc.rmk (revision 1989)
+++ conf/i386-pc.rmk (working copy)
@@ -236,11 +248,13 @@
# For _multiboot.mod.
_multiboot_mod_SOURCES = loader/i386/pc/multiboot.c \
+ loader/i386/multiboot.S \
loader/i386/pc/multiboot2.c \
loader/multiboot2.c \
loader/multiboot_loader.c
_multiboot_mod_CFLAGS = $(COMMON_CFLAGS)
_multiboot_mod_LDFLAGS = $(COMMON_LDFLAGS)
+_multiboot_mod_ASFLAGS = $(COMMON_ASFLAGS)
# For multiboot.mod.
multiboot_mod_SOURCES = loader/multiboot_loader_normal.c
Index: conf/i386-coreboot.rmk
===================================================================
--- conf/i386-coreboot.rmk (revision 1989)
+++ conf/i386-coreboot.rmk (working copy)
@@ -150,10 +150,12 @@
# For _multiboot.mod.
_multiboot_mod_SOURCES = loader/i386/pc/multiboot.c \
loader/i386/pc/multiboot2.c \
+ loader/i386/multiboot.S \
loader/multiboot2.c \
loader/multiboot_loader.c
_multiboot_mod_CFLAGS = $(COMMON_CFLAGS)
_multiboot_mod_LDFLAGS = $(COMMON_LDFLAGS)
+_multiboot_mod_ASFLAGS = $(COMMON_ASFLAGS)
# For multiboot.mod.
multiboot_mod_SOURCES = loader/multiboot_loader_normal.c
Index: conf/i386-ieee1275.rmk
===================================================================
--- conf/i386-ieee1275.rmk (revision 1989)
+++ conf/i386-ieee1275.rmk (working copy)
@@ -124,10 +124,12 @@
# For _multiboot.mod.
_multiboot_mod_SOURCES = loader/ieee1275/multiboot2.c \
+ loader/i386/multiboot.S \
loader/multiboot2.c \
loader/multiboot_loader.c
_multiboot_mod_CFLAGS = $(COMMON_CFLAGS)
_multiboot_mod_LDFLAGS = $(COMMON_LDFLAGS)
+_multiboot_mod_ASFLAGS = $(COMMON_ASFLAGS)
# For multiboot.mod.
multiboot_mod_SOURCES = loader/multiboot_loader_normal.c
Index: kern/i386/loader.S
===================================================================
--- kern/i386/loader.S (revision 1989)
+++ kern/i386/loader.S (working copy)
@@ -117,104 +117,3 @@
linux_setup_seg:
.word 0
.code32
-
-
-/*
- * This starts the multiboot kernel.
- */
-
-VARIABLE(grub_multiboot_payload_size)
- .long 0
-VARIABLE(grub_multiboot_payload_orig)
- .long 0
-VARIABLE(grub_multiboot_payload_dest)
- .long 0
-VARIABLE(grub_multiboot_payload_entry_offset)
- .long 0
-
-/*
- * The relocators below understand the following parameters:
- * ecx: Size of the block to be copied.
- * esi: Where to copy from (always lowest address, even if we're relocating
- * backwards).
- * edi: Where to copy to (likewise).
- * edx: Offset of the entry point (relative to the beginning of the block).
- */
-VARIABLE(grub_multiboot_forward_relocator)
- /* Add entry offset. */
- addl %edi, %edx
-
- /* Forward copy. */
- cld
- rep
- movsb
-
- jmp *%edx
-VARIABLE(grub_multiboot_forward_relocator_end)
-
-VARIABLE(grub_multiboot_backward_relocator)
- /* Add entry offset (before %edi is mangled). */
- addl %edi, %edx
-
- /* Backward movsb is implicitly off-by-one. compensate that. */
- decl %esi
- decl %edi
-
- /* Backward copy. */
- std
- addl %ecx, %esi
- addl %ecx, %edi
- rep
- movsb
-
- jmp *%edx
-VARIABLE(grub_multiboot_backward_relocator_end)
-
-FUNCTION(grub_multiboot_real_boot)
- /* Push the entry address on the stack. */
- pushl %eax
- /* Move the address of the multiboot information structure to ebx. */
- movl %edx,%ebx
-
- /* Unload all modules and stop the floppy driver. */
- call EXT_C(grub_dl_unload_all)
- call EXT_C(grub_stop_floppy)
-
- /* Interrupts should be disabled. */
- cli
-
- /* Where do we copy what from. */
- movl EXT_C(grub_multiboot_payload_size), %ecx
- movl EXT_C(grub_multiboot_payload_orig), %esi
- movl EXT_C(grub_multiboot_payload_dest), %edi
- movl EXT_C(grub_multiboot_payload_entry_offset), %edx
-
- /* Move the magic value into eax. */
- movl $MULTIBOOT_MAGIC2, %eax
-
- /* Jump to the relocator. */
- popl %ebp
- jmp *%ebp
-
-/*
- * This starts the multiboot 2 kernel.
- */
-
-FUNCTION(grub_multiboot2_real_boot)
- /* Push the entry address on the stack. */
- pushl %eax
- /* Move the address of the multiboot information structure to ebx. */
- movl %edx,%ebx
-
- /* Unload all modules and stop the floppy driver. */
- call EXT_C(grub_dl_unload_all)
- call EXT_C(grub_stop_floppy)
-
- /* Interrupts should be disabled. */
- cli
-
- /* Move the magic value into eax and jump to the kernel. */
- movl $MULTIBOOT2_BOOTLOADER_MAGIC,%eax
- popl %ecx
- jmp *%ecx
-
Index: include/grub/i386/multiboot.h
===================================================================
--- include/grub/i386/multiboot.h (revision 0)
+++ include/grub/i386/multiboot.h (revision 0)
@@ -0,0 +1,24 @@
+#ifndef GRUB_MULTIBOOT_CPU_HEADER
+#define GRUB_MULTIBOOT_CPU_HEADER 1
+
+/* The asm part of the multiboot loader. */
+void grub_multiboot_real_boot (grub_addr_t entry,
+ struct grub_multiboot_info *mbi)
+ __attribute__ ((noreturn));
+void grub_multiboot2_real_boot (grub_addr_t entry,
+ struct grub_multiboot_info *mbi)
+ __attribute__ ((noreturn));
+
+extern grub_addr_t grub_multiboot_payload_orig;
+extern grub_addr_t grub_multiboot_payload_dest;
+extern grub_size_t grub_multiboot_payload_size;
+extern grub_uint32_t grub_multiboot_payload_entry_offset;
+
+extern grub_uint8_t grub_multiboot_forward_relocator;
+extern grub_uint8_t grub_multiboot_forward_relocator_end;
+extern grub_uint8_t grub_multiboot_backward_relocator;
+extern grub_uint8_t grub_multiboot_backward_relocator_end;
+
+#define RELOCATOR_SIZEOF(x) (&grub_multiboot_##x##_relocator_end - &grub_multiboot_##x##_relocator)
+
+#endif /* ! GRUB_MULTIBOOT_CPU_HEADER */
Index: include/grub/i386/loader.h
===================================================================
--- include/grub/i386/loader.h (revision 1989)
+++ include/grub/i386/loader.h (working copy)
@@ -22,7 +22,6 @@
#include <grub/types.h>
#include <grub/err.h>
#include <grub/symbol.h>
-#include <grub/multiboot.h>
extern grub_uint32_t EXPORT_VAR(grub_linux_prot_size);
extern char *EXPORT_VAR(grub_linux_tmp_addr);
@@ -33,31 +32,15 @@
grub_err_t EXPORT_FUNC(grub_linux_boot) (void);
-/* The asm part of the multiboot loader. */
-void EXPORT_FUNC(grub_multiboot_real_boot) (grub_addr_t entry,
- struct grub_multiboot_info *mbi)
- __attribute__ ((noreturn));
-void EXPORT_FUNC(grub_multiboot2_real_boot) (grub_addr_t entry,
- struct grub_multiboot_info *mbi)
- __attribute__ ((noreturn));
void EXPORT_FUNC(grub_unix_real_boot) (grub_addr_t entry, ...)
__attribute__ ((cdecl,noreturn));
-extern grub_addr_t EXPORT_VAR(grub_multiboot_payload_orig);
-extern grub_addr_t EXPORT_VAR(grub_multiboot_payload_dest);
-extern grub_size_t EXPORT_VAR(grub_multiboot_payload_size);
-extern grub_uint32_t EXPORT_VAR(grub_multiboot_payload_entry_offset);
-
/* It is necessary to export these functions, because normal mode commands
reuse rescue mode commands. */
void grub_rescue_cmd_linux (int argc, char *argv[]);
void grub_rescue_cmd_initrd (int argc, char *argv[]);
-extern grub_uint8_t EXPORT_VAR(grub_multiboot_forward_relocator);
-extern grub_uint8_t EXPORT_VAR(grub_multiboot_forward_relocator_end);
-extern grub_uint8_t EXPORT_VAR(grub_multiboot_backward_relocator);
-extern grub_uint8_t EXPORT_VAR(grub_multiboot_backward_relocator_end);
+void EXPORT_FUNC(grub_stop_floppy) (void);
-#define RELOCATOR_SIZEOF(x) (&grub_multiboot_##x##_relocator_end - &grub_multiboot_##x##_relocator)
#endif /* ! GRUB_LOADER_CPU_HEADER */
Index: loader/i386/multiboot.S
===================================================================
--- loader/i386/multiboot.S (revision 0)
+++ loader/i386/multiboot.S (revision 0)
@@ -0,0 +1,97 @@
+#include <grub/symbol.h>
+#include <multiboot.h>
+#include <multiboot2.h>
+
+ .p2align 2 /* force 4-byte alignment */
+
+/*
+ * This starts the multiboot kernel.
+ */
+
+VARIABLE(grub_multiboot_payload_size)
+ .long 0
+VARIABLE(grub_multiboot_payload_orig)
+ .long 0
+VARIABLE(grub_multiboot_payload_dest)
+ .long 0
+VARIABLE(grub_multiboot_payload_entry_offset)
+ .long 0
+
+/*
+ * The relocators below understand the following parameters:
+ * ecx: Size of the block to be copied.
+ * esi: Where to copy from (always lowest address, even if we're relocating
+ * backwards).
+ * edi: Where to copy to (likewise).
+ * edx: Offset of the entry point (relative to the beginning of the block).
+ */
+
+VARIABLE(grub_multiboot_forward_relocator)
+ /* Add entry offset. */
+ addl %edi, %edx
+
+ /* Forward copy. */
+ cld
+ rep
+ movsb
+
+ jmp *%edx
+VARIABLE(grub_multiboot_forward_relocator_end)
+
+VARIABLE(grub_multiboot_backward_relocator)
+ /* Add entry offset (before %edi is mangled). */
+ addl %edi, %edx
+
+ /* Backward movsb is implicitly off-by-one. compensate that. */
+ decl %esi
+ decl %edi
+
+ /* Backward copy. */
+ std
+ addl %ecx, %esi
+ addl %ecx, %edi
+ rep
+ movsb
+
+ jmp *%edx
+VARIABLE(grub_multiboot_backward_relocator_end)
+
+FUNCTION(grub_multiboot_real_boot)
+ /* Push the entry address on the stack. */
+ pushl %eax
+ /* Move the address of the multiboot information structure to ebx. */
+ movl %edx,%ebx
+
+ /* Interrupts should be disabled. */
+ cli
+
+ /* Where do we copy what from. */
+ movl EXT_C(grub_multiboot_payload_size), %ecx
+ movl EXT_C(grub_multiboot_payload_orig), %esi
+ movl EXT_C(grub_multiboot_payload_dest), %edi
+ movl EXT_C(grub_multiboot_payload_entry_offset), %edx
+
+ /* Move the magic value into eax. */
+ movl $MULTIBOOT_MAGIC2, %eax
+
+ /* Jump to the relocator. */
+ popl %ebp
+ jmp *%ebp
+
+/*
+ * This starts the multiboot 2 kernel.
+ */
+
+FUNCTION(grub_multiboot2_real_boot)
+ /* Push the entry address on the stack. */
+ pushl %eax
+ /* Move the address of the multiboot information structure to ebx. */
+ movl %edx,%ebx
+
+ /* Interrupts should be disabled. */
+ cli
+
+ /* Move the magic value into eax and jump to the kernel. */
+ movl $MULTIBOOT2_BOOTLOADER_MAGIC,%eax
+ popl %ecx
+ jmp *%ecx
Index: loader/i386/pc/multiboot.c
===================================================================
--- loader/i386/pc/multiboot.c (revision 1989)
+++ loader/i386/pc/multiboot.c (working copy)
@@ -32,6 +32,7 @@
#include <grub/multiboot.h>
#include <grub/machine/init.h>
#include <grub/machine/memory.h>
+#include <grub/cpu/multiboot.h>
#include <grub/elf.h>
#include <grub/aout.h>
#include <grub/file.h>
@@ -52,6 +53,7 @@
static grub_err_t
grub_multiboot_boot (void)
{
+ grub_stop_floppy ();
grub_multiboot_real_boot (entry, mbi);
/* Not reached. */
Index: loader/i386/pc/multiboot2.c
===================================================================
--- loader/i386/pc/multiboot2.c (revision 1989)
+++ loader/i386/pc/multiboot2.c (working copy)
@@ -73,6 +73,7 @@
void
grub_mb2_arch_boot (grub_addr_t entry, void *tags)
{
+ grub_stop_floppy ();
grub_multiboot2_real_boot (entry, tags);
}
_______________________________________________
Grub-devel mailing list
Grub-devel@gnu.org
http://lists.gnu.org/mailman/listinfo/grub-devel
