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authorAlex Smith <alex@alex-smith.me.uk>2014-07-23 17:40:13 +0400
committerRalf Baechle <ralf@linux-mips.org>2014-08-02 02:06:37 +0400
commita79ebea620109cf5e58711077177b34d60960898 (patch)
treed7745b50619c92af16f3b6657a07d5440a37d5c3 /arch/mips/include/uapi
parent457ed7702dcc8ba13e3eea7f2d44d0e18dc76b3f (diff)
downloadlinux-a79ebea620109cf5e58711077177b34d60960898.tar.xz
MIPS: ptrace: Fix user pt_regs definition, use in ptrace_{get, set}regs()
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>
Diffstat (limited to 'arch/mips/include/uapi')
-rw-r--r--arch/mips/include/uapi/asm/ptrace.h25
1 files changed, 14 insertions, 11 deletions
diff --git a/arch/mips/include/uapi/asm/ptrace.h b/arch/mips/include/uapi/asm/ptrace.h
index b26f7e317279..bbcfb8ba8106 100644
--- a/arch/mips/include/uapi/asm/ptrace.h
+++ b/arch/mips/include/uapi/asm/ptrace.h
@@ -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