From: Benjamin Herrenschmidt Date: Thu, 17 Apr 2008 04:34:59 +0000 (+1000) Subject: [POWERPC] Move stackframe definitions to common header X-Git-Tag: v2.6.26-rc1~1125^2~7 X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=ec2b36b9f23cfbbe94d89724b796b44fd57d5221;p=linux-2.6 [POWERPC] Move stackframe definitions to common header This moves various definitions used all over the place to parse stack frames to ptrace.h so only one definition is needed. Signed-off-by: Benjamin Herrenschmidt Signed-off-by: Paul Mackerras --- diff --git a/arch/powerpc/kernel/entry_64.S b/arch/powerpc/kernel/entry_64.S index 148a3547c9..1301984553 100644 --- a/arch/powerpc/kernel/entry_64.S +++ b/arch/powerpc/kernel/entry_64.S @@ -29,6 +29,7 @@ #include #include #include +#include /* * System calls. @@ -39,7 +40,7 @@ /* This value is used to mark exception frames on the stack. */ exception_marker: - .tc ID_72656773_68657265[TC],0x7265677368657265 + .tc ID_EXC_MARKER[TC],STACK_FRAME_REGS_MARKER .section ".text" .align 7 diff --git a/arch/powerpc/kernel/head_32.S b/arch/powerpc/kernel/head_32.S index c16d1354b1..785af9b565 100644 --- a/arch/powerpc/kernel/head_32.S +++ b/arch/powerpc/kernel/head_32.S @@ -30,6 +30,7 @@ #include #include #include +#include /* 601 only have IBAT; cr0.eq is set on 601 when using this macro */ #define LOAD_BAT(n, reg, RA, RB) \ @@ -268,8 +269,8 @@ __secondary_hold_acknowledge: li r10,MSR_KERNEL & ~(MSR_IR|MSR_DR); /* can take exceptions */ \ MTMSRD(r10); /* (except for mach check in rtas) */ \ stw r0,GPR0(r11); \ - lis r10,0x7265; /* put exception frame marker */ \ - addi r10,r10,0x6773; \ + lis r10,STACK_FRAME_REGS_MARKER@ha; /* exception frame marker */ \ + addi r10,r10,STACK_FRAME_REGS_MARKER@l; \ stw r10,8(r11); \ SAVE_4GPRS(3, r11); \ SAVE_2GPRS(7, r11) diff --git a/arch/powerpc/kernel/process.c b/arch/powerpc/kernel/process.c index a27910207c..703100d5e4 100644 --- a/arch/powerpc/kernel/process.c +++ b/arch/powerpc/kernel/process.c @@ -914,20 +914,6 @@ int validate_sp(unsigned long sp, struct task_struct *p, return valid_irq_stack(sp, p, nbytes); } -#ifdef CONFIG_PPC64 -#define MIN_STACK_FRAME 112 /* same as STACK_FRAME_OVERHEAD, in fact */ -#define FRAME_LR_SAVE 2 -#define INT_FRAME_SIZE (sizeof(struct pt_regs) + STACK_FRAME_OVERHEAD + 288) -#define REGS_MARKER 0x7265677368657265ul -#define FRAME_MARKER 12 -#else -#define MIN_STACK_FRAME 16 -#define FRAME_LR_SAVE 1 -#define INT_FRAME_SIZE (sizeof(struct pt_regs) + STACK_FRAME_OVERHEAD) -#define REGS_MARKER 0x72656773ul -#define FRAME_MARKER 2 -#endif - EXPORT_SYMBOL(validate_sp); unsigned long get_wchan(struct task_struct *p) @@ -939,15 +925,15 @@ unsigned long get_wchan(struct task_struct *p) return 0; sp = p->thread.ksp; - if (!validate_sp(sp, p, MIN_STACK_FRAME)) + if (!validate_sp(sp, p, STACK_FRAME_OVERHEAD)) return 0; do { sp = *(unsigned long *)sp; - if (!validate_sp(sp, p, MIN_STACK_FRAME)) + if (!validate_sp(sp, p, STACK_FRAME_OVERHEAD)) return 0; if (count > 0) { - ip = ((unsigned long *)sp)[FRAME_LR_SAVE]; + ip = ((unsigned long *)sp)[STACK_FRAME_LR_SAVE]; if (!in_sched_functions(ip)) return ip; } @@ -976,12 +962,12 @@ void show_stack(struct task_struct *tsk, unsigned long *stack) lr = 0; printk("Call Trace:\n"); do { - if (!validate_sp(sp, tsk, MIN_STACK_FRAME)) + if (!validate_sp(sp, tsk, STACK_FRAME_OVERHEAD)) return; stack = (unsigned long *) sp; newsp = stack[0]; - ip = stack[FRAME_LR_SAVE]; + ip = stack[STACK_FRAME_LR_SAVE]; if (!firstframe || ip != lr) { printk("["REG"] ["REG"] ", sp, ip); print_symbol("%s", ip); @@ -995,8 +981,8 @@ void show_stack(struct task_struct *tsk, unsigned long *stack) * See if this is an exception frame. * We look for the "regshere" marker in the current frame. */ - if (validate_sp(sp, tsk, INT_FRAME_SIZE) - && stack[FRAME_MARKER] == REGS_MARKER) { + if (validate_sp(sp, tsk, STACK_INT_FRAME_SIZE) + && stack[STACK_FRAME_MARKER] == STACK_FRAME_REGS_MARKER) { struct pt_regs *regs = (struct pt_regs *) (sp + STACK_FRAME_OVERHEAD); printk("--- Exception: %lx", regs->trap); diff --git a/arch/powerpc/xmon/xmon.c b/arch/powerpc/xmon/xmon.c index 00fd7647f8..52c74780f4 100644 --- a/arch/powerpc/xmon/xmon.c +++ b/arch/powerpc/xmon/xmon.c @@ -1243,15 +1243,12 @@ static void get_function_bounds(unsigned long pc, unsigned long *startp, static int xmon_depth_to_print = 64; -#ifdef CONFIG_PPC64 -#define LRSAVE_OFFSET 0x10 -#define REG_FRAME_MARKER 0x7265677368657265ul /* "regshere" */ -#define MARKER_OFFSET 0x60 +#define LRSAVE_OFFSET (STACK_FRAME_LR_SAVE * sizeof(unsigned long)) +#define MARKER_OFFSET (STACK_FRAME_MARKER * sizeof(unsigned long)) + +#ifdef __powerpc64__ #define REGS_OFFSET 0x70 #else -#define LRSAVE_OFFSET 4 -#define REG_FRAME_MARKER 0x72656773 -#define MARKER_OFFSET 8 #define REGS_OFFSET 16 #endif @@ -1317,7 +1314,7 @@ static void xmon_show_stack(unsigned long sp, unsigned long lr, /* Look for "regshere" marker to see if this is an exception frame. */ if (mread(sp + MARKER_OFFSET, &marker, sizeof(unsigned long)) - && marker == REG_FRAME_MARKER) { + && marker == STACK_FRAME_REGS_MARKER) { if (mread(sp + REGS_OFFSET, ®s, sizeof(regs)) != sizeof(regs)) { printf("Couldn't read registers at %lx\n", diff --git a/include/asm-powerpc/ptrace.h b/include/asm-powerpc/ptrace.h index 891d68932f..39023dde1c 100644 --- a/include/asm-powerpc/ptrace.h +++ b/include/asm-powerpc/ptrace.h @@ -58,6 +58,11 @@ struct pt_regs { #define __ARCH_WANT_COMPAT_SYS_PTRACE #define STACK_FRAME_OVERHEAD 112 /* size of minimum stack frame */ +#define STACK_FRAME_LR_SAVE 2 /* Location of LR in stack frame */ +#define STACK_FRAME_REGS_MARKER ASM_CONST(0x7265677368657265) +#define STACK_INT_FRAME_SIZE (sizeof(struct pt_regs) + \ + STACK_FRAME_OVERHEAD + 288) +#define STACK_FRAME_MARKER 12 /* Size of dummy stack frame allocated when calling signal handler. */ #define __SIGNAL_FRAMESIZE 128 @@ -66,6 +71,10 @@ struct pt_regs { #else /* __powerpc64__ */ #define STACK_FRAME_OVERHEAD 16 /* size of minimum stack frame */ +#define STACK_FRAME_LR_SAVE 1 /* Location of LR in stack frame */ +#define STACK_FRAME_REGS_MARKER ASM_CONST(0x72656773) +#define STACK_INT_FRAME_SIZE (sizeof(struct pt_regs) + STACK_FRAME_OVERHEAD) +#define STACK_FRAME_MARKER 2 /* Size of stack frame allocated when calling signal handler. */ #define __SIGNAL_FRAMESIZE 64