diff options
author | Hirokazu Takata <takata@linux-m32r.org> | 2006-04-19 05:21:20 (GMT) |
---|---|---|
committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-04-19 16:13:50 (GMT) |
commit | 8e8ff02c0b61d9b7c15c7996a2eddbedf51a105b (patch) | |
tree | dde7fcedee5d8720f5cc95da5ed4629fd3369bc8 /include/asm-m32r | |
parent | efe87d2b822e42975b4da958c9d321cf89bfeb5a (diff) | |
download | linux-fsl-qoriq-8e8ff02c0b61d9b7c15c7996a2eddbedf51a105b.tar.xz |
[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>
Diffstat (limited to 'include/asm-m32r')
-rw-r--r-- | include/asm-m32r/assembler.h | 5 | ||||
-rw-r--r-- | include/asm-m32r/ptrace.h | 25 | ||||
-rw-r--r-- | include/asm-m32r/sigcontext.h | 2 |
3 files changed, 17 insertions, 15 deletions
diff --git a/include/asm-m32r/assembler.h b/include/asm-m32r/assembler.h index b7f4d8a..1a1aa17 100644 --- a/include/asm-m32r/assembler.h +++ b/include/asm-m32r/assembler.h @@ -109,6 +109,9 @@ push r13 mvfachi r13 push r13 + ldi r13, #0 + push r13 ; dummy push acc1h + push r13 ; dummy push acc1l #else #error unknown isa configuration #endif @@ -156,6 +159,8 @@ pop r13 mvtaclo r13, a1 #elif defined(CONFIG_ISA_M32R2) || defined(CONFIG_ISA_M32R) + pop r13 ; dummy pop acc1h + pop r13 ; dummy pop acc1l pop r13 mvtachi r13 pop r13 diff --git a/include/asm-m32r/ptrace.h b/include/asm-m32r/ptrace.h index 0d058b2..53c7924 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 diff --git a/include/asm-m32r/sigcontext.h b/include/asm-m32r/sigcontext.h index c233e2d..942b8a3 100644 --- a/include/asm-m32r/sigcontext.h +++ b/include/asm-m32r/sigcontext.h @@ -32,6 +32,8 @@ struct sigcontext { #elif defined(CONFIG_ISA_M32R2) || defined(CONFIG_ISA_M32R) unsigned long sc_acch; unsigned long sc_accl; + unsigned long sc_dummy_acc1h; + unsigned long sc_dummy_acc1l; #else #error unknown isa configuration #endif |