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[PATCH v4 06/36] bsd-user/i386/target_arch_signal.h: Update mcontext_t t


From: Warner Losh
Subject: [PATCH v4 06/36] bsd-user/i386/target_arch_signal.h: Update mcontext_t to match FreeBSD
Date: Thu, 4 Nov 2021 21:18:47 -0600

Fill in target_mcontext_t to match the FreeBSD mcontex_t. Also tag the
current size of mcontext and ucontext to enable size checking for i386.

Signed-off-by: Warner Losh <imp@bsdimp.com>
---
 bsd-user/i386/target_arch_signal.h | 46 ++++++++++++++++++++++++++++++
 1 file changed, 46 insertions(+)

diff --git a/bsd-user/i386/target_arch_signal.h 
b/bsd-user/i386/target_arch_signal.h
index bf7263c4f8..701c6f964f 100644
--- a/bsd-user/i386/target_arch_signal.h
+++ b/bsd-user/i386/target_arch_signal.h
@@ -28,8 +28,54 @@
 #define TARGET_SIGSTKSZ     (MINSIGSTKSZ + 32768)   /* recommended size */
 
 typedef struct target_mcontext {
+    abi_ulong   mc_onstack;     /* XXX - sigcontext compat. */
+    abi_ulong   mc_gs;          /* machine state (struct trapframe) */
+    abi_ulong   mc_fs;
+    abi_ulong   mc_es;
+    abi_ulong   mc_ds;
+    abi_ulong   mc_edi;
+    abi_ulong   mc_esi;
+    abi_ulong   mc_ebp;
+    abi_ulong   mc_isp;
+    abi_ulong   mc_ebx;
+    abi_ulong   mc_edx;
+    abi_ulong   mc_ecx;
+    abi_ulong   mc_eax;
+    abi_ulong   mc_trapno;
+    abi_ulong   mc_err;
+    abi_ulong   mc_eip;
+    abi_ulong   mc_cs;
+    abi_ulong   mc_eflags;
+    abi_ulong   mc_esp;
+    abi_ulong   mc_ss;
+
+    int32_t     mc_len;                 /* sizeof(mcontext_t) */
+#define _MC_FPFMT_NODEV         0x10000 /* device not present or configured */
+#define _MC_FPFMT_387           0x10001
+#define _MC_FPFMT_XMM           0x10002
+    int32_t     mc_fpformat;
+#define _MC_FPOWNED_NONE        0x20000 /* FP state not used */
+#define _MC_FPOWNED_FPU         0x20001 /* FP state came from FPU */
+#define _MC_FPOWNED_PCB         0x20002 /* FP state came from PCB */
+    int32_t     mc_ownedfp;
+    abi_ulong mc_flags;
+        /*
+         * See <machine/npx.h> for the internals of mc_fpstate[].
+         */
+    int32_t     mc_fpstate[128] __aligned(16);
+
+    abi_ulong mc_fsbase;
+    abi_ulong mc_gsbase;
+
+    abi_ulong mc_xfpustate;
+    abi_ulong mc_xfpustate_len;
+
+    int32_t     mc_spare2[4];
 } target_mcontext_t;
 
+#define TARGET_MCONTEXT_SIZE 640
+#define TARGET_UCONTEXT_SIZE 704
+
 #include "target_os_ucontext.h"
 
 struct target_sigframe {
-- 
2.33.0




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