linux-sg2042/include/asm-m32r/sigcontext.h

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#ifndef _ASM_M32R_SIGCONTEXT_H
#define _ASM_M32R_SIGCONTEXT_H
/* $Id$ */
struct sigcontext {
/* CPU registers */
/* Saved main processor registers. */
unsigned long sc_r4;
unsigned long sc_r5;
unsigned long sc_r6;
struct pt_regs *sc_pt_regs;
unsigned long sc_r0;
unsigned long sc_r1;
unsigned long sc_r2;
unsigned long sc_r3;
unsigned long sc_r7;
unsigned long sc_r8;
unsigned long sc_r9;
unsigned long sc_r10;
unsigned long sc_r11;
unsigned long sc_r12;
/* Saved main processor status and miscellaneous context registers. */
#if defined(CONFIG_ISA_M32R2) && defined(CONFIG_ISA_DSP_LEVEL2)
unsigned long sc_acc0h;
unsigned long sc_acc0l;
unsigned long sc_acc1h;
unsigned long sc_acc1l;
#elif defined(CONFIG_ISA_M32R2) || defined(CONFIG_ISA_M32R)
unsigned long sc_acch;
unsigned long sc_accl;
[PATCH] m32r: Fix pt_regs for !COFNIG_ISA_DSP_LEVEL2 target This modification is required to fix debugging function for m32r targets with !CONFIG_ISA_DSP_LEVEL2, by unifying 'struct pt_regs' and 'struct sigcontext' size for all M32R ISA. Some m32r processor core with !CONFIG_ISA_DSP_LEVEL2 configuration has only single accumulator a0 (ex. VDEC2 core, M32102 core, etc.), the others with CONFIG_ISA_DSP_LEVEL2 has two accumulators, a0 and a1. This means there are two variations of thread context. So far, we reduced and changed stackframe size at a syscall for their context size. However, this causes a problem that a GDB for processors with CONFIG_ISA_DSP_LEVEL2 cannot be used for processors with !CONFIG_ISA_DSP_LEVEL2. From the viewpoint of GDB support, we should reduce such variation of stackframe size for simplicity. In this patch, dummy members are added to 'struct pt_regs' and 'struct sigcontext' to adjust their size for !CONFIG_ISA_DSP_LEVEL2. This modification is also a one step for a GDB update in future. Currently, on the m32r, GDB can access process's context by using ptrace functions in a simple way of register by register access. By unifying stackframe size, we have a possibility to make use of ptrace functions of not only a single register access but also block register access, PTRACE_{GETREGS,PUTREGS}. However, for this purpose, we might have to modify stackframe structure some more; for example, PSW (processor status word) register should be pre-processed before pushing to stack at a syscall, and so on. In this case, we must update carefully both kernel and GDB at a time... Signed-off-by: Hayato Fujiwara <fujiwara@linux-m32r.org> Signed-off-by: Hirokazu Takata <takata@linux-m32r.org> Cc: Kei Sakamoto <ksakamot@linux-m32r.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-04-19 13:21:20 +08:00
unsigned long sc_dummy_acc1h;
unsigned long sc_dummy_acc1l;
#else
#error unknown isa configuration
#endif
unsigned long sc_psw;
unsigned long sc_bpc; /* saved PC for TRAP syscalls */
unsigned long sc_bbpsw;
unsigned long sc_bbpc;
unsigned long sc_spu; /* saved user stack */
unsigned long sc_fp;
unsigned long sc_lr; /* saved PC for JL syscalls */
unsigned long sc_spi; /* saved kernel stack */
unsigned long oldmask;
};
#endif /* _ASM_M32R_SIGCONTEXT_H */