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MIPS: Add offsets to sigcontext FP fields to struct mips_abi 

Add fields to struct mips_abi, which holds information regarding the
kernel-userland ABI regarding signals, to specify the offsets to the FP
related fields within the appropriate variant of struct sigcontext.

Signed-off-by: Paul Burton <paul.burton@imgtec.com>
Cc: linux-mips@linux-mips.org
Cc: Guenter Roeck <linux@roeck-us.net>
Cc: Matthew Fortune <matthew.fortune@imgtec.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: linux-kernel@vger.kernel.org
Cc: Richard Weinberger <richard@nod.at>
Cc: James Hogan <james.hogan@imgtec.com>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Maciej W. Rozycki <macro@codesourcery.com>
Patchwork: https://patchwork.linux-mips.org/patch/10788/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
This commit is contained in:
Paul Burton 2015-07-27 12:58:14 -07:00 committed by Ralf Baechle
parent 689ee8565c
commit 778561006e
4 changed files with 19 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
arch/mips/include/asm/abi.h
View File

@ -20,6 +20,10 @@ struct mips_abi {
struct pt_regs *regs, sigset_t *set);
const unsigned long rt_signal_return_offset;
const unsigned long restart;
unsigned off_sc_fpregs;
unsigned off_sc_fpc_csr;
unsigned off_sc_used_math;
};
#endif /* _ASM_ABI_H */

6
arch/mips/kernel/signal.c
View File

@ -521,7 +521,11 @@ struct mips_abi mips_abi = {
.setup_rt_frame = setup_rt_frame,
.rt_signal_return_offset =
offsetof(struct mips_vdso, rt_signal_trampoline),
.restart = __NR_restart_syscall
.restart = __NR_restart_syscall,
.off_sc_fpregs = offsetof(struct sigcontext, sc_fpregs),
.off_sc_fpc_csr = offsetof(struct sigcontext, sc_fpc_csr),
.off_sc_used_math = offsetof(struct sigcontext, sc_used_math),
};
static void handle_signal(struct ksignal *ksig, struct pt_regs *regs)

6
arch/mips/kernel/signal32.c
View File

@ -585,7 +585,11 @@ struct mips_abi mips_abi_32 = {
.setup_rt_frame = setup_rt_frame_32,
.rt_signal_return_offset =
offsetof(struct mips_vdso, o32_rt_signal_trampoline),
.restart = __NR_O32_restart_syscall
.restart = __NR_O32_restart_syscall,
.off_sc_fpregs = offsetof(struct sigcontext32, sc_fpregs),
.off_sc_fpc_csr = offsetof(struct sigcontext32, sc_fpc_csr),
.off_sc_used_math = offsetof(struct sigcontext32, sc_used_math),
};
static int signal32_init(void)

6
arch/mips/kernel/signal_n32.c
View File

@ -153,5 +153,9 @@ struct mips_abi mips_abi_n32 = {
.setup_rt_frame = setup_rt_frame_n32,
.rt_signal_return_offset =
offsetof(struct mips_vdso, n32_rt_signal_trampoline),
.restart = __NR_N32_restart_syscall
.restart = __NR_N32_restart_syscall,
.off_sc_fpregs = offsetof(struct sigcontext, sc_fpregs),
.off_sc_fpc_csr = offsetof(struct sigcontext, sc_fpc_csr),
.off_sc_used_math = offsetof(struct sigcontext, sc_used_math),
};