Author: gonzo
Date: Thu Mar 15 05:29:51 2012
New Revision: 232998
URL: http://svn.freebsd.org/changeset/base/232998
Log:
Fill out fake preload structure to let userland tools like pmc(3) know
about kernel module base address and actual size
Modified:
head/sys/conf/Makefile.mips
head/sys/mips/mips/machdep.c
Modified: head/sys/conf/Makefile.mips
==============================================================================
--- head/sys/conf/Makefile.mips Thu Mar 15 05:11:29 2012 (r232997)
+++ head/sys/conf/Makefile.mips Thu Mar 15 05:29:51 2012 (r232998)
@@ -44,7 +44,7 @@ MKMODULESENV+= MACHINE=${MACHINE} MACHIN
# We default to the MIPS32 ISA, if none specified in the
# kernel configuration file.
ARCH_FLAGS?=-march=mips32
-EXTRA_FLAGS=-fno-pic -mno-abicalls -G0
+EXTRA_FLAGS=-fno-pic -mno-abicalls -G0 -DKERNLOADADDR=${KERNLOADADDR}
HACK_EXTRA_FLAGS=-shared
Modified: head/sys/mips/mips/machdep.c
==============================================================================
--- head/sys/mips/mips/machdep.c Thu Mar 15 05:11:29 2012
(r232997)
+++ head/sys/mips/mips/machdep.c Thu Mar 15 05:29:51 2012
(r232998)
@@ -380,6 +380,56 @@ mips_vector_init(void)
void
mips_postboot_fixup(void)
{
+ static char fake_preload[256];
+ caddr_t preload_ptr = (caddr_t)&fake_preload[0];
+ size_t size = 0;
+
+ /*
+ * Provide kernel module file information
+ */
+ *(uint32_t*)(preload_ptr + size) = MODINFO_NAME;
+ size += sizeof(uint32_t);
+ *(uint32_t*)(preload_ptr + size) = strlen("kernel") + 1;
+ size += sizeof(uint32_t);
+ strcpy((char*)(preload_ptr + size), "kernel");
+ size += strlen("kernel") + 1;
+ size = roundup(size, sizeof(u_long));
+
+ *(uint32_t*)(preload_ptr + size) = MODINFO_TYPE;
+ size += sizeof(uint32_t);
+ *(uint32_t*)(preload_ptr + size) = strlen("elf kernel") + 1;
+ size += sizeof(uint32_t);
+ strcpy((char*)(preload_ptr + size), "elf kernel");
+ size += strlen("elf kernel") + 1;
+ size = roundup(size, sizeof(u_long));
+
+ *(uint32_t*)(preload_ptr + size) = MODINFO_ADDR;
+ size += sizeof(uint32_t);
+ *(uint32_t*)(preload_ptr + size) = sizeof(vm_offset_t);
+ size += sizeof(uint32_t);
+ *(vm_offset_t*)(preload_ptr + size) = KERNLOADADDR;
+ size += sizeof(vm_offset_t);
+ size = roundup(size, sizeof(u_long));
+
+ *(uint32_t*)(preload_ptr + size) = MODINFO_SIZE;
+ size += sizeof(uint32_t);
+ *(uint32_t*)(preload_ptr + size) = sizeof(size_t);
+ size += sizeof(uint32_t);
+ *(vm_offset_t*)(preload_ptr + size) = (size_t)&end - KERNLOADADDR;
+ size = roundup(size, sizeof(u_long));
+ size += sizeof(size_t);
+
+ /* End marker */
+ *(uint32_t*)(preload_ptr + size) = 0;
+ size += sizeof(uint32_t);
+ *(uint32_t*)(preload_ptr + size) = 0;
+ size += sizeof(uint32_t);
+
+ KASSERT((size < sizeof(fake_preload)),
+ ("fake preload size is more thenallocated"));
+
+ preload_metadata = (void *)fake_preload;
+
#ifdef DDB
Elf_Size *trampoline_data = (Elf_Size*)kernel_kseg0_end;
Elf_Size symtabsize = 0;
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