75e29b18d9
The KSTK_* macros used an inordinate amount of stack. In order to overcome an impedance mismatch between their interface, which just returns a single register value, and the interface of get_thread_regs, which took a full pt_regs, the implementation created an on-stack pt_regs, filled it in, and returned one field. do_task_stat calls KSTK_* twice, resulting in two local pt_regs, blowing out the stack. This patch changes the interface (and name) of get_thread_regs to just return a single register from a jmp_buf. The include of archsetjmp.h" in registers.h to get the definition of jmp_buf exposed a bogus include of <setjmp.h> in start_up.c. <setjmp.h> shouldn't be used anywhere any more since UML uses the klibc setjmp/longjmp. Signed-off-by: Jeff Dike <jdike@addtoit.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
22 lines
673 B
C
22 lines
673 B
C
/*
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* Copyright (C) 2004 PathScale, Inc
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* Licensed under the GPL
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*/
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#ifndef __REGISTERS_H
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#define __REGISTERS_H
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#include "sysdep/ptrace.h"
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#include "sysdep/archsetjmp.h"
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extern void init_thread_registers(union uml_pt_regs *to);
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extern int save_fp_registers(int pid, unsigned long *fp_regs);
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extern int restore_fp_registers(int pid, unsigned long *fp_regs);
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extern void save_registers(int pid, union uml_pt_regs *regs);
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extern void restore_registers(int pid, union uml_pt_regs *regs);
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extern void init_registers(int pid);
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extern void get_safe_registers(unsigned long * regs, unsigned long * fp_regs);
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extern unsigned long get_thread_reg(int reg, jmp_buf *buf);
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#endif
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