Hard code max size. Taken from
https://sourceware.org/git/?p=binutils-gdb.git;a=blob;f=gdb/common/x86-xstate.h
v3: use static fp_regs for get_skas_faultinfo
Signed-off-by: Thomas Meyer <tho...@m3y3r.de>
---
arch/um/os-Linux/skas/process.c | 7 ++++---
arch/x86/um/os-Linux/registers.c | 18 ++++++++++++------
arch/x86/um/user-offsets.c | 2 +-
3 files changed, 17 insertions(+), 10 deletions(-)
diff --git a/arch/um/os-Linux/skas/process.c b/arch/um/os-Linux/skas/process.c
index 03b3c4cc7735..b5fdef795985 100644
--- a/arch/um/os-Linux/skas/process.c
+++ b/arch/um/os-Linux/skas/process.c
@@ -88,12 +88,13 @@ void wait_stub_done(int pid)
extern unsigned long current_stub_stack(void);
+static unsigned long skas_faultinfo_fpregs[FP_SIZE];
+
static void get_skas_faultinfo(int pid, struct faultinfo *fi)
{
int err;
- unsigned long fpregs[FP_SIZE];
- err = get_fp_registers(pid, fpregs);
+ err = get_fp_registers(pid, skas_faultinfo_fpregs);
if (err < 0) {
printk(UM_KERN_ERR "save_fp_registers returned %d\n",
err);
@@ -113,7 +114,7 @@ static void get_skas_faultinfo(int pid, struct faultinfo
*fi)
*/
memcpy(fi, (void *)current_stub_stack(), sizeof(*fi));
- err = put_fp_registers(pid, fpregs);
+ err = put_fp_registers(pid, skas_faultinfo_fpregs);
if (err < 0) {
printk(UM_KERN_ERR "put_fp_registers returned %d\n",
err);
diff --git a/arch/x86/um/os-Linux/registers.c b/arch/x86/um/os-Linux/registers.c
index 00f54a91bb4b..2717911d1bef 100644
--- a/arch/x86/um/os-Linux/registers.c
+++ b/arch/x86/um/os-Linux/registers.c
@@ -5,6 +5,7 @@
*/
#include <errno.h>
+#include <stdlib.h>
#include <sys/ptrace.h>
#ifdef __i386__
#include <sys/user.h>
@@ -30,7 +31,7 @@ int save_fp_registers(int pid, unsigned long *fp_regs)
if (have_xstate_support) {
iov.iov_base = fp_regs;
- iov.iov_len = sizeof(struct _xstate);
+ iov.iov_len = FP_SIZE * sizeof(unsigned long);
if (ptrace(PTRACE_GETREGSET, pid, NT_X86_XSTATE, &iov) < 0)
return -errno;
return 0;
@@ -49,10 +50,9 @@ int restore_i387_registers(int pid, unsigned long *fp_regs)
int restore_fp_registers(int pid, unsigned long *fp_regs)
{
struct iovec iov;
-
if (have_xstate_support) {
iov.iov_base = fp_regs;
- iov.iov_len = sizeof(struct _xstate);
+ iov.iov_len = FP_SIZE * sizeof(unsigned long);
if (ptrace(PTRACE_SETREGSET, pid, NT_X86_XSTATE, &iov) < 0)
return -errno;
return 0;
@@ -122,13 +122,19 @@ int put_fp_registers(int pid, unsigned long *regs)
void arch_init_registers(int pid)
{
- struct _xstate fp_regs;
+ void * fp_regs;
struct iovec iov;
- iov.iov_base = &fp_regs;
- iov.iov_len = sizeof(struct _xstate);
+ fp_regs = malloc(FP_SIZE * sizeof(unsigned long));
+ if(fp_regs == NULL)
+ return;
+
+ iov.iov_base = fp_regs;
+ iov.iov_len = FP_SIZE * sizeof(unsigned long);
if (ptrace(PTRACE_GETREGSET, pid, NT_X86_XSTATE, &iov) == 0)
have_xstate_support = 1;
+
+ free(fp_regs);
}
#endif
diff --git a/arch/x86/um/user-offsets.c b/arch/x86/um/user-offsets.c
index cb3c22370cf5..c0111f093361 100644
--- a/arch/x86/um/user-offsets.c
+++ b/arch/x86/um/user-offsets.c
@@ -50,7 +50,7 @@ void foo(void)
DEFINE(HOST_GS, GS);
DEFINE(HOST_ORIG_AX, ORIG_EAX);
#else
- DEFINE(HOST_FP_SIZE, sizeof(struct _xstate) / sizeof(unsigned long));
+ DEFINE_LONGS(HOST_FP_SIZE, 2696);
DEFINE_LONGS(HOST_BX, RBX);
DEFINE_LONGS(HOST_CX, RCX);
DEFINE_LONGS(HOST_DI, RDI);
--
2.13.0
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