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Date: Wed, 03 Feb 2010 11:59:57 +0100
From: Michal Simek <monstr@...str.eu>
To: Christoph Hellwig <hch@....de>
CC: gerg@...inux.org, ysato@...rs.sourceforge.jp, roland@...hat.com,
oleg@...hat.com, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] use ptrace_request in the remaining architectures
Acked-by: Michal Simek <monstr@...str.eu>
Christoph Hellwig wrote:
> Use ptrace_request in the three remaining architectures that didn't use it
> (m68knommu, h8300, microblaze). This means:
>
> - ptrace_request now handles PTRACE_{PEEK,POKE}{TEXT,DATA} and PTRACE_DETATCH
> calls that were previously called directly, or in case of h8300 even open
> coded.
> - adds new support for PTRACE_SETOPTIONS/PTRACE_GETEVENTMSG/
> PTRACE_GETSIGINFO/PTRACE_SETSIGINFO
>
>
> Signed-off-by: Christoph Hellwig <hch@....de>
>
> Index: linux-2.6/arch/microblaze/kernel/ptrace.c
> ===================================================================
> --- linux-2.6.orig/arch/microblaze/kernel/ptrace.c 2010-02-01 19:59:02.981038462 +0100
> +++ linux-2.6/arch/microblaze/kernel/ptrace.c 2010-02-01 20:25:27.875284396 +0100
> @@ -78,26 +78,6 @@ long arch_ptrace(struct task_struct *chi
> unsigned long copied;
>
> switch (request) {
> - case PTRACE_PEEKTEXT: /* read word at location addr. */
> - case PTRACE_PEEKDATA:
> - pr_debug("PEEKTEXT/PEEKDATA at %08lX\n", addr);
> - copied = access_process_vm(child, addr, &val, sizeof(val), 0);
> - rval = -EIO;
> - if (copied != sizeof(val))
> - break;
> - rval = put_user(val, (unsigned long *)data);
> - break;
> -
> - case PTRACE_POKETEXT: /* write the word at location addr. */
> - case PTRACE_POKEDATA:
> - pr_debug("POKETEXT/POKEDATA to %08lX\n", addr);
> - rval = 0;
> - if (access_process_vm(child, addr, &data, sizeof(data), 1)
> - == sizeof(data))
> - break;
> - rval = -EIO;
> - break;
> -
> /* Read/write the word at location ADDR in the registers. */
> case PTRACE_PEEKUSR:
> case PTRACE_POKEUSR:
> @@ -167,13 +147,8 @@ long arch_ptrace(struct task_struct *chi
> wake_up_process(child);
> break;
>
> - case PTRACE_DETACH: /* detach a process that was attached. */
> - pr_debug("PTRACE_DETACH\n");
> - rval = ptrace_detach(child, data);
> - break;
> default:
> - /* rval = ptrace_request(child, request, addr, data); noMMU */
> - rval = -EIO;
> + rval = ptrace_request(child, request, addr, data);
> }
> return rval;
> }
> Index: linux-2.6/arch/h8300/kernel/ptrace.c
> ===================================================================
> --- linux-2.6.orig/arch/h8300/kernel/ptrace.c 2010-02-01 20:20:37.081006798 +0100
> +++ linux-2.6/arch/h8300/kernel/ptrace.c 2010-02-01 20:25:56.513254706 +0100
> @@ -42,14 +42,6 @@ extern void h8300_enable_trace(struct ta
> * in exit.c or in signal.c.
> */
>
> -inline
> -static int read_long(struct task_struct * tsk, unsigned long addr,
> - unsigned long * result)
> -{
> - *result = *(unsigned long *)addr;
> - return 0;
> -}
> -
> void ptrace_disable(struct task_struct *child)
> {
> h8300_disable_trace(child);
> @@ -60,17 +52,6 @@ long arch_ptrace(struct task_struct *chi
> int ret;
>
> switch (request) {
> - case PTRACE_PEEKTEXT: /* read word at location addr. */
> - case PTRACE_PEEKDATA: {
> - unsigned long tmp;
> -
> - ret = read_long(child, addr, &tmp);
> - if (ret < 0)
> - break ;
> - ret = put_user(tmp, (unsigned long *) data);
> - break ;
> - }
> -
> /* read the word at location addr in the USER area. */
> case PTRACE_PEEKUSR: {
> unsigned long tmp = 0;
> @@ -109,11 +90,6 @@ long arch_ptrace(struct task_struct *chi
> }
>
> /* 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) || addr < 0 || addr >= sizeof(struct user)) {
> ret = -EIO;
> @@ -175,10 +151,6 @@ long arch_ptrace(struct task_struct *chi
> break;
> }
>
> - case PTRACE_DETACH: /* detach a process that was attached. */
> - ret = ptrace_detach(child, data);
> - break;
> -
> case PTRACE_GETREGS: { /* Get all gp regs from the child. */
> int i;
> unsigned long tmp;
> @@ -210,7 +182,7 @@ long arch_ptrace(struct task_struct *chi
> }
>
> default:
> - ret = -EIO;
> + ret = ptrace_request(child, request, addr, data);
> break;
> }
> return ret;
> Index: linux-2.6/arch/m68knommu/kernel/ptrace.c
> ===================================================================
> --- linux-2.6.orig/arch/m68knommu/kernel/ptrace.c 2010-02-01 20:24:00.894003983 +0100
> +++ linux-2.6/arch/m68knommu/kernel/ptrace.c 2010-02-01 20:25:41.433023480 +0100
> @@ -116,12 +116,6 @@ long arch_ptrace(struct task_struct *chi
> int ret;
>
> 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: {
> unsigned long tmp;
> @@ -160,12 +154,6 @@ long arch_ptrace(struct task_struct *chi
> 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 */
> ret = -EIO;
> if ((addr & 3) || addr < 0 ||
> @@ -258,10 +246,6 @@ long arch_ptrace(struct task_struct *chi
> break;
> }
>
> - case PTRACE_DETACH: /* detach a process that was attached. */
> - ret = ptrace_detach(child, data);
> - break;
> -
> case PTRACE_GETREGS: { /* Get all gp regs from the child. */
> int i;
> unsigned long tmp;
> @@ -320,7 +304,7 @@ long arch_ptrace(struct task_struct *chi
> #endif
>
> default:
> - ret = -EIO;
> + ret = ptrace_request(child, request, addr, data);
> break;
> }
> return ret;
--
Michal Simek, Ing. (M.Eng)
w: www.monstr.eu p: +42-0-721842854
Maintainer of Linux kernel 2.6 Microblaze Linux - http://www.monstr.eu/fdt/
Microblaze U-BOOT custodian
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