[PATCH V2] powerpc mm init_32 gdb regions
From: Ed Swarthout <hidden>
Date: 2007-09-21 02:53:33
Subsystem:
linux for powerpc (32-bit and 64-bit), the rest · Maintainers:
Madhavan Srinivasan, Linus Torvalds
Add memory regions to the kcore list for 32-bit machines. The entries are only 32-bit, so restrict the virtual address to stay below 0xffff_ffff. With KERNELBASE set to 0xc000_0000, this in effect restricts access to the first 1GB of real memory. Make setup_kcore conditional on CONFIG_PROC_KCORE for both 32/64. Signed-off-by: Ed Swarthout <redacted> --- arch/powerpc/mm/init_32.c | 37 +++++++++++++++++++++++++++++++++++++ arch/powerpc/mm/init_64.c | 2 ++ 2 files changed, 39 insertions(+), 0 deletions(-)
diff --git a/arch/powerpc/mm/init_32.c b/arch/powerpc/mm/init_32.c
index d65995a..27c234f 100644
--- a/arch/powerpc/mm/init_32.c
+++ b/arch/powerpc/mm/init_32.c@@ -255,3 +255,40 @@ void free_initrd_mem(unsigned long start, unsigned long end) } } #endif + +#ifdef CONFIG_PROC_KCORE +static struct kcore_list kcore_vmem; + +static int __init setup_kcore(void) +{ + int i; + + for (i = 0; i < lmb.memory.cnt; i++) { + unsigned long base; + unsigned long size; + struct kcore_list *kcore_mem; + + base = lmb.memory.region[i].base; + size = lmb.memory.region[i].size; + + kcore_mem = kmalloc(sizeof(struct kcore_list), GFP_ATOMIC); + if (!kcore_mem) + panic("%s: kmalloc failed\n", __FUNCTION__); + + /* must stay under 32 bits */ + if ( 0xfffffffful - (unsigned long)__va(base) < size) { + size = 0xfffffffful - (unsigned long)(__va(base)); + printk(KERN_DEBUG "setup_kcore: restrict size=%lx\n", + size); + } + + kclist_add(kcore_mem, __va(base), size); + } + + kclist_add(&kcore_vmem, (void *)VMALLOC_START, + VMALLOC_END-VMALLOC_START); + + return 0; +} +module_init(setup_kcore); +#endif
diff --git a/arch/powerpc/mm/init_64.c b/arch/powerpc/mm/init_64.c
index 9f27bb5..fa90f65 100644
--- a/arch/powerpc/mm/init_64.c
+++ b/arch/powerpc/mm/init_64.c@@ -113,6 +113,7 @@ void free_initrd_mem(unsigned long start, unsigned long end) } #endif +#ifdef CONFIG_PROC_KCORE static struct kcore_list kcore_vmem; static int __init setup_kcore(void)
@@ -139,6 +140,7 @@ static int __init setup_kcore(void) return 0; } module_init(setup_kcore); +#endif static void zero_ctor(void *addr, struct kmem_cache *cache, unsigned long flags) {
--
1.5.3.1.65.g47184