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Commit 87ce6280 authored by Vineet Gupta's avatar Vineet Gupta
Browse files

ARC: Make pt_regs regs unsigned 



KGDB fails to build after f51e2f19 ("ARC: make sure instruction_pointer()
returns unsigned value")

The hack to force one specific reg to unsigned backfired. There's no
reason to keep the regs signed after all.

|  CC      arch/arc/kernel/kgdb.o
|../arch/arc/kernel/kgdb.c: In function 'kgdb_trap':
| ../arch/arc/kernel/kgdb.c:180:29: error: lvalue required as left operand of assignment
|   instruction_pointer(regs) -= BREAK_INSTR_SIZE;

Reported-by: default avatarYuriy Kolerov <yuriy.kolerov@synopsys.com>
Fixes: f51e2f19 ("ARC: make sure instruction_pointer() returns unsigned value")
Cc: Alexey Brodkin <abrodkin@synopsys.com>
Signed-off-by: default avatarVineet Gupta <vgupta@synopsys.com>
parent b89aa12c

arch/arc/include/asm/ptrace.h

+27 −27
Original line number Diff line number Diff line
@@ -20,20 +20,20 @@ 
struct pt_regs {



	/* Real registers */

	long bta;	/* bta_l1, bta_l2, erbta */

	unsigned long bta;	/* bta_l1, bta_l2, erbta */



	long lp_start, lp_end, lp_count;

	unsigned long lp_start, lp_end, lp_count;



	long status32;	/* status32_l1, status32_l2, erstatus */

	long ret;	/* ilink1, ilink2 or eret */

	long blink;

	long fp;

	long r26;	/* gp */

	unsigned long status32;	/* status32_l1, status32_l2, erstatus */

	unsigned long ret;	/* ilink1, ilink2 or eret */

	unsigned long blink;

	unsigned long fp;

	unsigned long r26;	/* gp */



	long r12, r11, r10, r9, r8, r7, r6, r5, r4, r3, r2, r1, r0;

	unsigned long r12, r11, r10, r9, r8, r7, r6, r5, r4, r3, r2, r1, r0;



	long sp;	/* user/kernel sp depending on where we came from  */

	long orig_r0;

	unsigned long sp;	/* User/Kernel depending on where we came from */

	unsigned long orig_r0;



	/*

	 * To distinguish bet excp, syscall, irq
@@ -55,13 +55,13 @@ struct pt_regs { 
		unsigned long event;

	};



	long user_r25;

	unsigned long user_r25;

};

#else



struct pt_regs {



	long orig_r0;

	unsigned long orig_r0;



	union {

		struct {
@@ -76,26 +76,26 @@ struct pt_regs { 
		unsigned long event;

	};



	long bta;	/* bta_l1, bta_l2, erbta */

	unsigned long bta;	/* bta_l1, bta_l2, erbta */



	long user_r25;

	unsigned long user_r25;



	long r26;	/* gp */

	long fp;

	long sp;	/* user/kernel sp depending on where we came from  */

	unsigned long r26;	/* gp */

	unsigned long fp;

	unsigned long sp;	/* user/kernel sp depending on where we came from  */



	long r12;

	unsigned long r12;



	/*------- Below list auto saved by h/w -----------*/

	long r0, r1, r2, r3, r4, r5, r6, r7, r8, r9, r10, r11;

	unsigned long r0, r1, r2, r3, r4, r5, r6, r7, r8, r9, r10, r11;



	long blink;

	long lp_end, lp_start, lp_count;

	unsigned long blink;

	unsigned long lp_end, lp_start, lp_count;



	long ei, ldi, jli;

	unsigned long ei, ldi, jli;



	long ret;

	long status32;

	unsigned long ret;

	unsigned long status32;

};



#endif
@@ -103,10 +103,10 @@ struct pt_regs { 
/* Callee saved registers - need to be saved only when you are scheduled out */



struct callee_regs {

	long r25, r24, r23, r22, r21, r20, r19, r18, r17, r16, r15, r14, r13;

	unsigned long r25, r24, r23, r22, r21, r20, r19, r18, r17, r16, r15, r14, r13;

};



#define instruction_pointer(regs)	(unsigned long)((regs)->ret)

#define instruction_pointer(regs)	((regs)->ret)

#define profile_pc(regs)		instruction_pointer(regs)



/* return 1 if user mode or 0 if kernel mode */
@@ -142,7 +142,7 @@ struct callee_regs { 


static inline long regs_return_value(struct pt_regs *regs)

{

	return regs->r0;

	return (long)regs->r0;

}



#endif /* !__ASSEMBLY__ */

arch/arc/include/uapi/asm/ptrace.h

+10 −10
Original line number Diff line number Diff line
@@ -32,20 +32,20 @@ 
*/

struct user_regs_struct {



	long pad;

	unsigned long pad;

	struct {

		long bta, lp_start, lp_end, lp_count;

		long status32, ret, blink, fp, gp;

		long r12, r11, r10, r9, r8, r7, r6, r5, r4, r3, r2, r1, r0;

		long sp;

		unsigned long bta, lp_start, lp_end, lp_count;

		unsigned long status32, ret, blink, fp, gp;

		unsigned long r12, r11, r10, r9, r8, r7, r6, r5, r4, r3, r2, r1, r0;

		unsigned long sp;

	} scratch;

	long pad2;

	unsigned long pad2;

	struct {

		long r25, r24, r23, r22, r21, r20;

		long r19, r18, r17, r16, r15, r14, r13;

		unsigned long r25, r24, r23, r22, r21, r20;

		unsigned long r19, r18, r17, r16, r15, r14, r13;

	} callee;

	long efa;	/* break pt addr, for break points in delay slots */

	long stop_pc;	/* give dbg stop_pc after ensuring brkpt trap */

	unsigned long efa;	/* break pt addr, for break points in delay slots */

	unsigned long stop_pc;	/* give dbg stop_pc after ensuring brkpt trap */

};

#endif /* !__ASSEMBLY__ */