diff options
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/i386/Kconfig.debug | 1 | ||||
| -rw-r--r-- | arch/i386/mm/init.c | 3 | ||||
| -rw-r--r-- | arch/parisc/kernel/unwind.c | 43 | ||||
| -rw-r--r-- | arch/x86_64/Kconfig.debug | 1 | ||||
| -rw-r--r-- | arch/x86_64/mm/init.c | 5 |
5 files changed, 43 insertions, 10 deletions
diff --git a/arch/i386/Kconfig.debug b/arch/i386/Kconfig.debug index 6293920cd1be..b31c0802e1cc 100644 --- a/arch/i386/Kconfig.debug +++ b/arch/i386/Kconfig.debug @@ -49,7 +49,6 @@ config DEBUG_PAGEALLOC config DEBUG_RODATA bool "Write protect kernel read-only data structures" depends on DEBUG_KERNEL - depends on !KPROBES # temporary for 2.6.22 help Mark the kernel read-only data as write-protected in the pagetables, in order to catch accidental (and incorrect) writes to such const diff --git a/arch/i386/mm/init.c b/arch/i386/mm/init.c index b22ce8d6b1ba..7135946d3663 100644 --- a/arch/i386/mm/init.c +++ b/arch/i386/mm/init.c @@ -799,6 +799,7 @@ void mark_rodata_ro(void) unsigned long start = PFN_ALIGN(_text); unsigned long size = PFN_ALIGN(_etext) - start; +#ifndef CONFIG_KPROBES #ifdef CONFIG_HOTPLUG_CPU /* It must still be possible to apply SMP alternatives. */ if (num_possible_cpus() <= 1) @@ -808,7 +809,7 @@ void mark_rodata_ro(void) size >> PAGE_SHIFT, PAGE_KERNEL_RX); printk("Write protecting the kernel text: %luk\n", size >> 10); } - +#endif start += size; size = (unsigned long)__end_rodata - start; change_page_attr(virt_to_page(start), diff --git a/arch/parisc/kernel/unwind.c b/arch/parisc/kernel/unwind.c index e70f57e27643..322167737de7 100644 --- a/arch/parisc/kernel/unwind.c +++ b/arch/parisc/kernel/unwind.c @@ -16,6 +16,8 @@ #include <asm/uaccess.h> #include <asm/assembly.h> +#include <asm/asm-offsets.h> +#include <asm/ptrace.h> #include <asm/unwind.h> @@ -26,6 +28,8 @@ #define dbg(x...) #endif +#define KERNEL_START (KERNEL_BINARY_TEXT_START - 0x1000) + extern struct unwind_table_entry __start___unwind[]; extern struct unwind_table_entry __stop___unwind[]; @@ -197,6 +201,29 @@ static int unwind_init(void) return 0; } +#ifdef CONFIG_64BIT +#define get_func_addr(fptr) fptr[2] +#else +#define get_func_addr(fptr) fptr[0] +#endif + +static int unwind_special(struct unwind_frame_info *info, unsigned long pc, int frame_size) +{ + void handle_interruption(int, struct pt_regs *); + static unsigned long *hi = (unsigned long)&handle_interruption; + + if (pc == get_func_addr(hi)) { + struct pt_regs *regs = (struct pt_regs *)(info->sp - frame_size - PT_SZ_ALGN); + dbg("Unwinding through handle_interruption()\n"); + info->prev_sp = regs->gr[30]; + info->prev_ip = regs->iaoq[0]; + + return 1; + } + + return 0; +} + static void unwind_frame_regs(struct unwind_frame_info *info) { const struct unwind_table_entry *e; @@ -310,13 +337,15 @@ static void unwind_frame_regs(struct unwind_frame_info *info) } } - info->prev_sp = info->sp - frame_size; - if (e->Millicode) - info->rp = info->r31; - else if (rpoffset) - info->rp = *(unsigned long *)(info->prev_sp - rpoffset); - info->prev_ip = info->rp; - info->rp = 0; + if (!unwind_special(info, e->region_start, frame_size)) { + info->prev_sp = info->sp - frame_size; + if (e->Millicode) + info->rp = info->r31; + else if (rpoffset) + info->rp = *(unsigned long *)(info->prev_sp - rpoffset); + info->prev_ip = info->rp; + info->rp = 0; + } dbg("analyzing func @ %lx, setting prev_sp=%lx " "prev_ip=%lx npc=%lx\n", info->ip, info->prev_sp, diff --git a/arch/x86_64/Kconfig.debug b/arch/x86_64/Kconfig.debug index 8a8677518447..775d211a5cf9 100644 --- a/arch/x86_64/Kconfig.debug +++ b/arch/x86_64/Kconfig.debug @@ -9,7 +9,6 @@ source "lib/Kconfig.debug" config DEBUG_RODATA bool "Write protect kernel read-only data structures" depends on DEBUG_KERNEL - depends on !KPROBES # temporary for 2.6.22 help Mark the kernel read-only data as write-protected in the pagetables, in order to catch accidental (and incorrect) writes to such const data. diff --git a/arch/x86_64/mm/init.c b/arch/x86_64/mm/init.c index efb6e845114e..9a0e98accf04 100644 --- a/arch/x86_64/mm/init.c +++ b/arch/x86_64/mm/init.c @@ -605,6 +605,11 @@ void mark_rodata_ro(void) if (num_possible_cpus() > 1) start = (unsigned long)_etext; #endif + +#ifdef CONFIG_KPROBES + start = (unsigned long)__start_rodata; +#endif + end = (unsigned long)__end_rodata; start = (start + PAGE_SIZE - 1) & PAGE_MASK; end &= PAGE_MASK; |