From bd16da5114e2f04772bf05604a608fbe006a485a Mon Sep 17 00:00:00 2001 From: Yao Qi Date: Mon, 1 Jun 2015 12:13:02 +0100 Subject: [PATCH] Fetch and store VFP registers by PTRACE_{G,S}ETREGSET This patch is to use PTRACE_{G,S}ETREGSET to fetch and store VFP registers if kernel supports. gdb: 2015-06-01 Yao Qi * arm-linux-nat.c (fetch_vfp_regs): Use PTRACE_GETREGSET. (store_vfp_regs): Use PTRACE_SETREGSET. --- gdb/ChangeLog | 5 +++++ gdb/arm-linux-nat.c | 35 ++++++++++++++++++++++++++++++++--- 2 files changed, 37 insertions(+), 3 deletions(-) diff --git a/gdb/ChangeLog b/gdb/ChangeLog index 646404f81b..0cfbd0d587 100644 --- a/gdb/ChangeLog +++ b/gdb/ChangeLog @@ -1,3 +1,8 @@ +2015-06-01 Yao Qi + + * arm-linux-nat.c (fetch_vfp_regs): Use PTRACE_GETREGSET. + (store_vfp_regs): Use PTRACE_SETREGSET. + 2015-06-01 Yao Qi * arm-linux-nat.c (fetch_fpregister): Use PTRACE_GETREGSET. diff --git a/gdb/arm-linux-nat.c b/gdb/arm-linux-nat.c index 2336845303..b18d443721 100644 --- a/gdb/arm-linux-nat.c +++ b/gdb/arm-linux-nat.c @@ -591,7 +591,17 @@ fetch_vfp_regs (struct regcache *regcache) /* Get the thread id for the ptrace call. */ tid = GET_THREAD_ID (inferior_ptid); - ret = ptrace (PTRACE_GETVFPREGS, tid, 0, regbuf); + if (have_ptrace_getregset) + { + struct iovec iov; + + iov.iov_base = regbuf; + iov.iov_len = VFP_REGS_SIZE; + ret = ptrace (PTRACE_GETREGSET, tid, NT_ARM_VFP, &iov); + } + else + ret = ptrace (PTRACE_GETVFPREGS, tid, 0, regbuf); + if (ret < 0) { warning (_("Unable to fetch VFP registers.")); @@ -617,7 +627,17 @@ store_vfp_regs (const struct regcache *regcache) /* Get the thread id for the ptrace call. */ tid = GET_THREAD_ID (inferior_ptid); - ret = ptrace (PTRACE_GETVFPREGS, tid, 0, regbuf); + if (have_ptrace_getregset) + { + struct iovec iov; + + iov.iov_base = regbuf; + iov.iov_len = VFP_REGS_SIZE; + ret = ptrace (PTRACE_GETREGSET, tid, NT_ARM_VFP, &iov); + } + else + ret = ptrace (PTRACE_GETVFPREGS, tid, 0, regbuf); + if (ret < 0) { warning (_("Unable to fetch VFP registers (for update).")); @@ -631,7 +651,16 @@ store_vfp_regs (const struct regcache *regcache) regcache_raw_collect (regcache, ARM_FPSCR_REGNUM, (char *) regbuf + 32 * 8); - ret = ptrace (PTRACE_SETVFPREGS, tid, 0, regbuf); + if (have_ptrace_getregset) + { + struct iovec iov; + + iov.iov_base = regbuf; + iov.iov_len = VFP_REGS_SIZE; + ret = ptrace (PTRACE_SETREGSET, tid, NT_ARM_VFP, &iov); + } + else + ret = ptrace (PTRACE_SETVFPREGS, tid, 0, regbuf); if (ret < 0) {