From 8e8ff02c0b61d9b7c15c7996a2eddbedf51a105b Mon Sep 17 00:00:00 2001 From: Hirokazu Takata Date: Tue, 18 Apr 2006 22:21:20 -0700 Subject: [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 Signed-off-by: Hirokazu Takata Cc: Kei Sakamoto Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- include/asm-m32r/ptrace.h | 25 ++++++++++--------------- 1 file changed, 10 insertions(+), 15 deletions(-) (limited to 'include/asm-m32r/ptrace.h') diff --git a/include/asm-m32r/ptrace.h b/include/asm-m32r/ptrace.h index 0d058b2d844..53c792452df 100644 --- a/include/asm-m32r/ptrace.h +++ b/include/asm-m32r/ptrace.h @@ -43,6 +43,14 @@ #define PT_ACC1L 18 #define PT_ACCH PT_ACC0H #define PT_ACCL PT_ACC0L +#elif defined(CONFIG_ISA_M32R2) || defined(CONFIG_ISA_M32R) +#define PT_ACCH 15 +#define PT_ACCL 16 +#define PT_DUMMY_ACC1H 17 +#define PT_DUMMY_ACC1L 18 +#else +#error unknown isa conifiguration +#endif #define PT_PSW 19 #define PT_BPC 20 #define PT_BBPSW 21 @@ -52,21 +60,6 @@ #define PT_LR 25 #define PT_SPI 26 #define PT_ORIGR0 27 -#elif defined(CONFIG_ISA_M32R2) || defined(CONFIG_ISA_M32R) -#define PT_ACCH 15 -#define PT_ACCL 16 -#define PT_PSW 17 -#define PT_BPC 18 -#define PT_BBPSW 19 -#define PT_BBPC 20 -#define PT_SPU 21 -#define PT_FP 22 -#define PT_LR 23 -#define PT_SPI 24 -#define PT_ORIGR0 25 -#else -#error unknown isa conifiguration -#endif /* virtual pt_reg entry for gdb */ #define PT_PC 30 @@ -121,6 +114,8 @@ struct pt_regs { #elif defined(CONFIG_ISA_M32R2) || defined(CONFIG_ISA_M32R) unsigned long acch; unsigned long accl; + unsigned long dummy_acc1h; + unsigned long dummy_acc1l; #else #error unknown isa configuration #endif -- cgit v1.2.3