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[S390] ptrace cleanup

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Overhaul program event recording and the code dealing with the ptrace
user space interface.

Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Martin Schwidefsky
2011-01-05 12:48:10 +01:00
committed by Martin Schwidefsky
parent da7f51c11d
commit 5e9a26928f
15 changed files with 346 additions and 262 deletions
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53
arch/s390/kernel/compat_ptrace.h
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@@ -4,40 +4,19 @@
#include <asm/ptrace.h> /* needed for NUM_CR_WORDS */
#include "compat_linux.h" /* needed for psw_compat_t */
typedef struct {
__u32 cr[NUM_CR_WORDS];
} per_cr_words32;
struct compat_per_struct_kernel {
__u32 cr9; /* PER control bits */
__u32 cr10; /* PER starting address */
__u32 cr11; /* PER ending address */
__u32 bits; /* Obsolete software bits */
__u32 starting_addr; /* User specified start address */
__u32 ending_addr; /* User specified end address */
__u16 perc_atmid; /* PER trap ATMID */
__u32 address; /* PER trap instruction address */
__u8 access_id; /* PER trap access identification */
};
typedef struct {
__u16 perc_atmid; /* 0x096 */
__u32 address; /* 0x098 */
__u8 access_id; /* 0x0a1 */
} per_lowcore_words32;
typedef struct {
union {
per_cr_words32 words;
} control_regs;
/*
* Use these flags instead of setting em_instruction_fetch
* directly they are used so that single stepping can be
* switched on & off while not affecting other tracing
*/
unsigned single_step : 1;
unsigned instruction_fetch : 1;
unsigned : 30;
/*
* These addresses are copied into cr10 & cr11 if single
* stepping is switched off
*/
__u32 starting_addr;
__u32 ending_addr;
union {
per_lowcore_words32 words;
} lowcore;
} per_struct32;
struct user_regs_struct32
struct compat_user_regs_struct
{
psw_compat_t psw;
u32 gprs[NUM_GPRS];
@@ -50,14 +29,14 @@ struct user_regs_struct32
* itself as there is no "official" ptrace interface for hardware
* watchpoints. This is the way intel does it.
*/
per_struct32 per_info;
struct compat_per_struct_kernel per_info;
u32 ieee_instruction_pointer; /* obsolete, always 0 */
};
struct user32 {
struct compat_user {
/* We start with the registers, to mimic the way that "memory"
is returned from the ptrace(3,...) function. */
struct user_regs_struct32 regs; /* Where the registers are actually stored */
struct compat_user_regs_struct regs;
/* The rest of this junk is to help gdb figure out what goes where */
u32 u_tsize; /* Text segment size (pages). */
u32 u_dsize; /* Data segment size (pages). */
@@ -79,6 +58,6 @@ typedef struct
__u32 len;
__u32 kernel_addr;
__u32 process_addr;
} ptrace_area_emu31;
} compat_ptrace_area;
#endif /* _PTRACE32_H */