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MIPS: ptrace: Fix user pt_regs definition, use in ptrace_{get, set}regs()

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In uapi/asm/ptrace.h, a user version of pt_regs is defined wrapped in
ifndef __KERNEL__. This structure definition does not match anything
used by any kernel API, in particular it does not match the format used
by PTRACE_{GET,SET}REGS.

Therefore, replace the structure definition with one matching what is
used by PTRACE_{GET,SET}REGS. The format used by these is the same for
both 32-bit and 64-bit.

Also, change the implementation of PTRACE_{GET,SET}REGS to use this new
structure definition. The structure is renamed to user_pt_regs when
__KERNEL__ is defined to avoid conflicts with the kernel's own pt_regs.

Signed-off-by: Alex Smith <alex@alex-smith.me.uk>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/7457/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
This commit is contained in:
Alex Smith
2014-07-23 14:40:13 +01:00
committed by Ralf Baechle
parent 457ed7702d
commit a79ebea620
4 changed files with 35 additions and 28 deletions
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25
arch/mips/include/uapi/asm/ptrace.h
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@@ -22,24 +22,27 @@
#define DSP_CONTROL 77
#define ACX 78
#ifndef __KERNEL__
/*
* This struct defines the way the registers are stored on the stack during a
* system call/exception. As usual the registers k0/k1 aren't being saved.
* This struct defines the registers as used by PTRACE_{GET,SET}REGS. The
* format is the same for both 32- and 64-bit processes. Registers for 32-bit
* processes are sign extended.
*/
#ifdef __KERNEL__
struct user_pt_regs {
#else
struct pt_regs {
#endif
/* Saved main processor registers. */
unsigned long regs[32];
__u64 regs[32];
/* Saved special registers. */
unsigned long cp0_status;
unsigned long hi;
unsigned long lo;
unsigned long cp0_badvaddr;
unsigned long cp0_cause;
unsigned long cp0_epc;
__u64 lo;
__u64 hi;
__u64 cp0_epc;
__u64 cp0_badvaddr;
__u64 cp0_status;
__u64 cp0_cause;
} __attribute__ ((aligned (8)));
#endif /* __KERNEL__ */
/* Arbitrarily choose the same ptrace numbers as used by the Sparc code. */
#define PTRACE_GETREGS 12