a3c195144e
The compiler is permitted to generate code which overwrites the parameters to a function. If those parameters include the only saved copy we have of userspace's registers, we're in trouble. Signed-off-by: Bobby Bingham <koorogi@koorogi.info> Cc: Paul Mundt <paul.mundt@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
60 lines
1.3 KiB
C
60 lines
1.3 KiB
C
#ifndef __ASM_SH_TRAPS_32_H
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#define __ASM_SH_TRAPS_32_H
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#include <linux/types.h>
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#include <asm/mmu.h>
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#ifdef CONFIG_CPU_HAS_SR_RB
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#define lookup_exception_vector() \
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({ \
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unsigned long _vec; \
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\
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__asm__ __volatile__ ( \
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"stc r2_bank, %0\n\t" \
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: "=r" (_vec) \
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); \
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\
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_vec; \
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})
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#else
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#define lookup_exception_vector() \
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({ \
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unsigned long _vec; \
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__asm__ __volatile__ ( \
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"mov r4, %0\n\t" \
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: "=r" (_vec) \
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); \
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\
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_vec; \
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})
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#endif
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static inline void trigger_address_error(void)
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{
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__asm__ __volatile__ (
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"ldc %0, sr\n\t"
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"mov.l @%1, %0"
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:
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: "r" (0x10000000), "r" (0x80000001)
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);
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}
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asmlinkage void do_address_error(struct pt_regs *regs,
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unsigned long writeaccess,
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unsigned long address);
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asmlinkage void do_divide_error(unsigned long r4);
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asmlinkage void do_reserved_inst(void);
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asmlinkage void do_illegal_slot_inst(void);
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asmlinkage void do_exception_error(void);
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#define BUILD_TRAP_HANDLER(name) \
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asmlinkage void name##_trap_handler(unsigned long r4, unsigned long r5, \
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unsigned long r6, unsigned long r7, \
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struct pt_regs __regs)
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#define TRAP_HANDLER_DECL \
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struct pt_regs *regs = RELOC_HIDE(&__regs, 0); \
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unsigned int vec = regs->tra; \
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(void)vec;
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#endif /* __ASM_SH_TRAPS_32_H */
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