linux-kernel - [PATCH 2/2] Blackfin: Deal with flat binfmt differently to FDPIC ELF binfmt when dumping

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [day] [month] [year] [list]

Message-Id: <1187249094.11475.29.camel@mercury.analog.com>
Date:	Thu, 16 Aug 2007 15:24:54 +0800
From:	Jie Zhang <jie.zhang@...log.com>
To:	linux-kernel@...r.kernel.org
Subject: [PATCH 2/2] Blackfin: Deal with flat binfmt differently to FDPIC
	ELF binfmt when dumping

This Blackfin arch patch uses the new `name' field in struct
linux_binfmt added by my first patch.


Jie


Signed-off-by: Jie Zhang <jie.zhang@...log.com>
---
 arch/blackfin/kernel/traps.c |   16 ++++++++++++----
 1 files changed, 12 insertions(+), 4 deletions(-)

diff --git a/arch/blackfin/kernel/traps.c b/arch/blackfin/kernel/traps.c
index 792a841..9961c21 100644
--- a/arch/blackfin/kernel/traps.c
+++ b/arch/blackfin/kernel/traps.c
@@ -111,9 +111,7 @@ static int printk_address(unsigned long address)
 				/* FLAT does not have its text aligned to the start of
 				 * the map while FDPIC ELF does ...
 				 */
-				if (current->mm &&
-				    (address > current->mm->start_code) &&
-				    (address < current->mm->end_code))
+				if (strcmp(current->binfmt->name, "flat") == 0)
 					offset = address - current->mm->start_code;
 				else
 					offset = (address - vma->vm_start) + (vma->vm_pgoff << PAGE_SHIFT);
@@ -533,7 +531,7 @@ void dump_bfin_regs(struct pt_regs *fp, void *retaddr)
 		     " or you are in the kernel\n");
 	}
 
-	if (current->mm) {
+	if (current->mm && strcmp(current->binfmt->name, "flat") == 0) {
 		printk(KERN_EMERG "TEXT = 0x%p-0x%p  DATA = 0x%p-0x%p\n"
 		       KERN_EMERG "BSS = 0x%p-0x%p   USER-STACK = 0x%p\n"
 		       KERN_EMERG "\n",
@@ -544,6 +542,16 @@ void dump_bfin_regs(struct pt_regs *fp, void *retaddr)
 		       (void *)current->mm->end_data,
 		       (void *)current->mm->brk,
 		       (void *)current->mm->start_stack);
+	} else if (current->mm
+		   && strcmp(current->binfmt->name, "ELF FDPIC") == 0) {
+		printk(KERN_EMERG "TEXT = 0x%p-0x%p  DATA = 0x%p-0x%p\n"
+		       KERN_EMERG "USER-STACK = 0x%p\n"
+		       KERN_EMERG "\n",
+		       (void *)current->mm->start_code,
+		       (void *)current->mm->end_code,
+		       (void *)current->mm->start_data,
+		       (void *)current->mm->end_data,
+		       (void *)current->mm->start_stack);
 	}
 
 	printk(KERN_EMERG "return address: [0x%p]; contents of:", retaddr);
-- 
1.5.2.4
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/