xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

powerpc: Extended ptrace interface

Browse Source 
powerpc: Extended ptrace interface

From: Dave Kleikamp <shaggy@linux.vnet.ibm.com>

Based on patches originally written by Torez Smith.

Add a new extended ptrace interface so that user-space has a single
interface for powerpc, without having to know the specific layout
of the debug registers.

Implement:
PPC_PTRACE_GETHWDEBUGINFO
PPC_PTRACE_SETHWDEBUG
PPC_PTRACE_DELHWDEBUG

Signed-off-by: Dave Kleikamp <shaggy@linux.vnet.ibm.com>
Acked-by: David Gibson <dwg@au1.ibm.com>
Cc: Torez Smith  <lnxtorez@linux.vnet.ibm.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Josh Boyer <jwboyer@linux.vnet.ibm.com>
Cc: Kumar Gala <galak@kernel.crashing.org>
Cc: Sergio Durigan Junior <sergiodj@br.ibm.com>
Cc: Thiago Jung Bauermann <bauerman@br.ibm.com>
Cc: linuxppc-dev list <Linuxppc-dev@ozlabs.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
This commit is contained in:
Dave Kleikamp
2010-02-08 11:51:05 +00:00
committed by Benjamin Herrenschmidt
parent 172ae2e7f8
commit 3162d92dfb
3 changed files with 301 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

77
arch/powerpc/include/asm/ptrace.h
View File

@@ -24,6 +24,12 @@
* 2 of the License, or (at your option) any later version.
*/
#ifdef __KERNEL__
#include <linux/types.h>
#else
#include <stdint.h>
#endif
#ifndef __ASSEMBLY__
struct pt_regs {
@@ -294,4 +300,75 @@ extern void user_disable_single_step(struct task_struct *);
#define PTRACE_SINGLEBLOCK 0x100 /* resume execution until next branch */
#define PPC_PTRACE_GETHWDBGINFO 0x89
#define PPC_PTRACE_SETHWDEBUG 0x88
#define PPC_PTRACE_DELHWDEBUG 0x87
#ifndef __ASSEMBLY__
struct ppc_debug_info {
uint32_t version; /* Only version 1 exists to date */
uint32_t num_instruction_bps;
uint32_t num_data_bps;
uint32_t num_condition_regs;
uint32_t data_bp_alignment;
uint32_t sizeof_condition; /* size of the DVC register */
uint64_t features;
};
#endif /* __ASSEMBLY__ */
/*
* features will have bits indication whether there is support for:
*/
#define PPC_DEBUG_FEATURE_INSN_BP_RANGE 0x0000000000000001
#define PPC_DEBUG_FEATURE_INSN_BP_MASK 0x0000000000000002
#define PPC_DEBUG_FEATURE_DATA_BP_RANGE 0x0000000000000004
#define PPC_DEBUG_FEATURE_DATA_BP_MASK 0x0000000000000008
#ifndef __ASSEMBLY__
struct ppc_hw_breakpoint {
uint32_t version; /* currently, version must be 1 */
uint32_t trigger_type; /* only some combinations allowed */
uint32_t addr_mode; /* address match mode */
uint32_t condition_mode; /* break/watchpoint condition flags */
uint64_t addr; /* break/watchpoint address */
uint64_t addr2; /* range end or mask */
uint64_t condition_value; /* contents of the DVC register */
};
#endif /* __ASSEMBLY__ */
/*
* Trigger Type
*/
#define PPC_BREAKPOINT_TRIGGER_EXECUTE 0x00000001
#define PPC_BREAKPOINT_TRIGGER_READ 0x00000002
#define PPC_BREAKPOINT_TRIGGER_WRITE 0x00000004
#define PPC_BREAKPOINT_TRIGGER_RW \
(PPC_BREAKPOINT_TRIGGER_READ | PPC_BREAKPOINT_TRIGGER_WRITE)
/*
* Address Mode
*/
#define PPC_BREAKPOINT_MODE_EXACT 0x00000000
#define PPC_BREAKPOINT_MODE_RANGE_INCLUSIVE 0x00000001
#define PPC_BREAKPOINT_MODE_RANGE_EXCLUSIVE 0x00000002
#define PPC_BREAKPOINT_MODE_MASK 0x00000003
/*
* Condition Mode
*/
#define PPC_BREAKPOINT_CONDITION_MODE 0x00000003
#define PPC_BREAKPOINT_CONDITION_NONE 0x00000000
#define PPC_BREAKPOINT_CONDITION_AND 0x00000001
#define PPC_BREAKPOINT_CONDITION_EXACT PPC_BREAKPOINT_CONDITION_AND
#define PPC_BREAKPOINT_CONDITION_OR 0x00000002
#define PPC_BREAKPOINT_CONDITION_AND_OR 0x00000003
#define PPC_BREAKPOINT_CONDITION_BE_ALL 0x00ff0000
#define PPC_BREAKPOINT_CONDITION_BE_SHIFT 16
#define PPC_BREAKPOINT_CONDITION_BE(n) \
(1<<((n)+PPC_BREAKPOINT_CONDITION_BE_SHIFT))
#endif /* _ASM_POWERPC_PTRACE_H */