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sh: Support for SH-2A 32-bit opcodes.

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SH-2A supports both 16 and 32-bit instructions, add a simple helper
for figuring out the instruction size in the places where there are
hardcoded 16-bit assumptions.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
This commit is contained in:
Paul Mundt
2007-05-08 14:50:59 +09:00
committed by Paul Mundt
parent 51c8b856f5
commit bd0799977c
6 changed files with 74 additions and 10 deletions
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8
arch/sh/kernel/signal.c
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@@ -23,7 +23,7 @@
#include <linux/personality.h>
#include <linux/binfmts.h>
#include <linux/freezer.h>
#include <asm/system.h>
#include <asm/ucontext.h>
#include <asm/uaccess.h>
#include <asm/pgtable.h>
@@ -500,7 +500,7 @@ handle_signal(unsigned long sig, struct k_sigaction *ka, siginfo_t *info,
}
/* fallthrough */
case -ERESTARTNOINTR:
regs->pc -= 2;
regs->pc -= instruction_size(regs->pc);
}
} else {
/* gUSA handling */
@@ -600,9 +600,9 @@ static void do_signal(struct pt_regs *regs, unsigned int save_r0)
regs->regs[0] == -ERESTARTSYS ||
regs->regs[0] == -ERESTARTNOINTR) {
regs->regs[0] = save_r0;
regs->pc -= 2;
regs->pc -= instruction_size(regs->pc);
} else if (regs->regs[0] == -ERESTART_RESTARTBLOCK) {
regs->pc -= 2;
regs->pc -= instruction_size(regs->pc);
regs->regs[3] = __NR_restart_syscall;
}
}