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| author | Paul Mundt <lethal@linux-sh.org> | 2008-05-19 06:40:12 +0200 |
|---|---|---|
| committer | Paul Mundt <lethal@linux-sh.org> | 2008-07-28 11:10:28 +0200 |
| commit | 3bc24a1a5441ef621daf737ec93b0a10e8999d59 (patch) | |
| tree | 09e3e2e8eda617de72f643aa22ba86490b16cd17 /arch/sh/kernel/signal_32.c | |
| parent | binfmt_elf_fdpic: Magical stack pointer index, for NEW_AUX_ENT compat. (diff) | |
| download | linux-3bc24a1a5441ef621daf737ec93b0a10e8999d59.tar.xz linux-3bc24a1a5441ef621daf737ec93b0a10e8999d59.zip | |
sh: Initial ELF FDPIC support.
This adds initial support for ELF FDPIC on MMU-less SH, as per version
0.2 of the ABI definition at:
http://www.codesourcery.com/public/docs/sh-fdpic/sh-fdpic-abi.txt
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Diffstat (limited to 'arch/sh/kernel/signal_32.c')
| -rw-r--r-- | arch/sh/kernel/signal_32.c | 25 |
1 files changed, 23 insertions, 2 deletions
diff --git a/arch/sh/kernel/signal_32.c b/arch/sh/kernel/signal_32.c index f311551d9a05..46170a9a7221 100644 --- a/arch/sh/kernel/signal_32.c +++ b/arch/sh/kernel/signal_32.c @@ -33,6 +33,11 @@ #define _BLOCKABLE (~(sigmask(SIGKILL) | sigmask(SIGSTOP))) +struct fdpic_func_descriptor { + unsigned long text; + unsigned long GOT; +}; + /* * Atomically swap in the new signal mask, and wait for a signal. */ @@ -378,7 +383,15 @@ static int setup_frame(int sig, struct k_sigaction *ka, regs->regs[4] = signal; /* Arg for signal handler */ regs->regs[5] = 0; regs->regs[6] = (unsigned long) &frame->sc; - regs->pc = (unsigned long) ka->sa.sa_handler; + + if (current->personality & FDPIC_FUNCPTRS) { + struct fdpic_func_descriptor __user *funcptr = + (struct fdpic_func_descriptor __user *)ka->sa.sa_handler; + + __get_user(regs->pc, &funcptr->text); + __get_user(regs->regs[12], &funcptr->GOT); + } else + regs->pc = (unsigned long)ka->sa.sa_handler; set_fs(USER_DS); @@ -458,7 +471,15 @@ static int setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info, regs->regs[4] = signal; /* Arg for signal handler */ regs->regs[5] = (unsigned long) &frame->info; regs->regs[6] = (unsigned long) &frame->uc; - regs->pc = (unsigned long) ka->sa.sa_handler; + + if (current->personality & FDPIC_FUNCPTRS) { + struct fdpic_func_descriptor __user *funcptr = + (struct fdpic_func_descriptor __user *)ka->sa.sa_handler; + + __get_user(regs->pc, &funcptr->text); + __get_user(regs->regs[12], &funcptr->GOT); + } else + regs->pc = (unsigned long)ka->sa.sa_handler; set_fs(USER_DS); |