[PATCH 03/16] MIPS: add offsets to sigcontext FP fields to struct mips_abi

From: Paul Burton
Date: Fri Jul 10 2015 - 11:02:10 EST


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@xxxxxxxxxx>
---

arch/mips/include/asm/abi.h | 4 ++++
arch/mips/kernel/signal.c | 6 +++++-
arch/mips/kernel/signal32.c | 6 +++++-
arch/mips/kernel/signal_n32.c | 6 +++++-
4 files changed, 19 insertions(+), 3 deletions(-)

diff --git a/arch/mips/include/asm/abi.h b/arch/mips/include/asm/abi.h
index 7186bb5..37f8407 100644
--- a/arch/mips/include/asm/abi.h
+++ b/arch/mips/include/asm/abi.h
@@ -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 */
diff --git a/arch/mips/kernel/signal.c b/arch/mips/kernel/signal.c
index 796c7d8..ddf8318 100644
--- a/arch/mips/kernel/signal.c
+++ b/arch/mips/kernel/signal.c
@@ -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)
diff --git a/arch/mips/kernel/signal32.c b/arch/mips/kernel/signal32.c
index 19a7705..6b65658 100644
--- a/arch/mips/kernel/signal32.c
+++ b/arch/mips/kernel/signal32.c
@@ -587,7 +587,11 @@ 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)
diff --git a/arch/mips/kernel/signal_n32.c b/arch/mips/kernel/signal_n32.c
index f1d4751..0d017fd 100644
--- a/arch/mips/kernel/signal_n32.c
+++ b/arch/mips/kernel/signal_n32.c
@@ -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),
};
--
2.4.4

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