From faa47b466935e73251b18b17d51455b06ed65764 Mon Sep 17 00:00:00 2001 From: Andreas Schwab Date: Sun, 10 May 2009 21:14:52 +0200 Subject: m68k: use generic code for ptrace requests Remove all but PTRACE_{PEEK,POKE}USR and PTRACE_{GET,SET}{REGS,FPREGS} from arch_ptrace and let the rest be handled by generic code. Define PTRACE_SINGLEBLOCK to enable singleblock tracing. [Geert] Not yet applicable for m68knommu Signed-off-by: Andreas Schwab Signed-off-by: Geert Uytterhoeven --- arch/m68k/kernel/ptrace.c | 75 +++++++++++++---------------------------------- 1 file changed, 21 insertions(+), 54 deletions(-) (limited to 'arch/m68k/kernel/ptrace.c') diff --git a/arch/m68k/kernel/ptrace.c b/arch/m68k/kernel/ptrace.c index 2075543c2d92..bd0842059d11 100644 --- a/arch/m68k/kernel/ptrace.c +++ b/arch/m68k/kernel/ptrace.c @@ -35,7 +35,9 @@ #define SR_MASK 0x001f /* sets the trace bits. */ -#define TRACE_BITS 0x8000 +#define TRACE_BITS 0xC000 +#define T1_BIT 0x8000 +#define T0_BIT 0x4000 /* Find the stack offset for a register, relative to thread.esp0. */ #define PT_REG(reg) ((long)&((struct pt_regs *)0)->reg) @@ -118,18 +120,30 @@ void ptrace_disable(struct task_struct *child) singlestep_disable(child); } +void user_enable_single_step(struct task_struct *child) +{ + unsigned long tmp = get_reg(child, PT_SR) & ~(TRACE_BITS << 16); + put_reg(child, PT_SR, tmp | (T1_BIT << 16)); + set_tsk_thread_flag(child, TIF_DELAYED_TRACE); +} + +void user_enable_block_step(struct task_struct *child) +{ + unsigned long tmp = get_reg(child, PT_SR) & ~(TRACE_BITS << 16); + put_reg(child, PT_SR, tmp | (T0_BIT << 16)); +} + +void user_disable_single_step(struct task_struct *child) +{ + singlestep_disable(child); +} + long arch_ptrace(struct task_struct *child, long request, long addr, long data) { unsigned long tmp; int i, ret = 0; switch (request) { - /* when I and D space are separate, these will need to be fixed. */ - case PTRACE_PEEKTEXT: /* read word at location addr. */ - case PTRACE_PEEKDATA: - ret = generic_ptrace_peekdata(child, addr, data); - break; - /* read the word at location addr in the USER area. */ case PTRACE_PEEKUSR: if (addr & 3) @@ -153,12 +167,6 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data) ret = put_user(tmp, (unsigned long *)data); break; - /* when I and D space are separate, this will have to be fixed. */ - case PTRACE_POKETEXT: /* write the word at location addr. */ - case PTRACE_POKEDATA: - ret = generic_ptrace_pokedata(child, addr, data); - break; - case PTRACE_POKEUSR: /* write the word at location addr in the USER area */ if (addr & 3) goto out_eio; @@ -185,47 +193,6 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data) goto out_eio; break; - case PTRACE_SYSCALL: /* continue and stop at next (return from) syscall */ - case PTRACE_CONT: /* restart after signal. */ - if (!valid_signal(data)) - goto out_eio; - - if (request == PTRACE_SYSCALL) - set_tsk_thread_flag(child, TIF_SYSCALL_TRACE); - else - clear_tsk_thread_flag(child, TIF_SYSCALL_TRACE); - child->exit_code = data; - singlestep_disable(child); - wake_up_process(child); - break; - - /* - * make the child exit. Best I can do is send it a sigkill. - * perhaps it should be put in the status that it wants to - * exit. - */ - case PTRACE_KILL: - if (child->exit_state == EXIT_ZOMBIE) /* already dead */ - break; - child->exit_code = SIGKILL; - singlestep_disable(child); - wake_up_process(child); - break; - - case PTRACE_SINGLESTEP: /* set the trap flag. */ - if (!valid_signal(data)) - goto out_eio; - - clear_tsk_thread_flag(child, TIF_SYSCALL_TRACE); - tmp = get_reg(child, PT_SR) | (TRACE_BITS << 16); - put_reg(child, PT_SR, tmp); - set_tsk_thread_flag(child, TIF_DELAYED_TRACE); - - child->exit_code = data; - /* give it a chance to run. */ - wake_up_process(child); - break; - case PTRACE_GETREGS: /* Get all gp regs from the child. */ for (i = 0; i < 19; i++) { tmp = get_reg(child, i); -- cgit