freebsd-ports/emulators/qemu-devel/files/patch-z9f-bsd-user-sson003f

diff --git a/bsd-user/arm/target_signal.h b/bsd-user/arm/target_signal.h
index 6b7bb67..4a9e518 100644
--- a/bsd-user/arm/target_signal.h
+++ b/bsd-user/arm/target_signal.h
@@ -3,15 +3,57 @@
 
 #include "cpu.h"
 
-static inline abi_ulong get_sp_from_cpustate(CPUARMState *state)
-{
-    return state->regs[13];
-}
+#define	TARGET_REG_R0	0
+#define	TARGET_REG_R1	1
+#define	TARGET_REG_R2	2
+#define	TARGET_REG_R3	3
+#define	TARGET_REG_R4	4
+#define	TARGET_REG_R5	5
+#define	TARGET_REG_R6	6
+#define	TARGET_REG_R7	7
+#define	TARGET_REG_R8	8
+#define	TARGET_REG_R9	9
+#define	TARGET_REG_R10	10
+#define	TARGET_REG_R11	11
+#define	TARGET_REG_R12	12
+#define	TARGET_REG_R13	13
+#define	TARGET_REG_R14	14
+#define	TARGET_REG_R15	15
+#define	TARGET_REG_CPSR	16
+/* Convenience synonyms */
+#define	TARGET_REG_FP	TARGET_REG_R11
+#define	TARGET_REG_SP	TARGET_REG_R13
+#define	TARGET_REG_LR	TARGET_REG_R14
+#define	TARGET_REG_PC	TARGET_REG_R15
+
+#define	TARGET_GET_MC_CLEAR_RET	1
 
 #define	TARGET_MINSIGSTKSZ	(1024 * 4)
 #define	TARGET_SIGSTKSZ		(TARGET_MINSIGSTKSZ + 32768)
+#define	TARGET__NGREG		17
+
+typedef struct {
+	uint32_t	__fp_fpsr;
+	struct {
+		uint32_t	__fp_exponent;
+		uint32_t	__fp_mantissa_hi;
+		uint32_t	__fp_mantissa_lo;
+	} 		__fp_fr[8];
+} target__fpregset_t;
 
-typedef target_ulong target_mcontext_t; /* dummy */
+typedef struct {
+	uint32_t	__vfp_fpscr;
+	uint32_t	__vfp_fstmx[33];
+	uint32_t	__vfp_fpsid;
+} target__vfpregset_t;
+
+typedef struct {
+	uint32_t		__gregs[TARGET__NGREG];
+	union {
+		target__fpregset_t	__fpregs;
+		target__vfpregset_t	__vfpregs;
+	} __fpu;
+} target_mcontext_t;
 
 typedef struct target_ucontext {
 	target_sigset_t		uc_sigmask;
@@ -22,18 +64,119 @@ typedef struct target_ucontext {
 	int32_t			__spare__[4];
 } target_ucontext_t;
 
+struct target_sigframe {
+	target_siginfo_t	sf_si;	/* saved siginfo */
+	target_ucontext_t	sf_uc;	/* saved ucontext */
+};
+
+#define	TARGET_SZSIGCODE	(8 * 4)
+
+/* Compare to arm/arm/locore.S ENTRY_NP(sigcode) */
+static inline int
+install_sigtramp(abi_ulong offset, unsigned sigf_us, uint32_t sys_sigreturn)
+{
+	int i;
+	uint32_t sys_exit = TARGET_FREEBSD_NR_exit;
+	/*
+	 * The code has to load r7 manually rather than using
+	 * "ldr r7, =SYS_return to make sure the size of the
+	 * code is correct.
+	 */
+	uint32_t sigtramp_code[] = {
+	/* 1 */	0xE1A0000D,			/* mov r0, sp */
+	/* 2 */	0xE59F700C,			/* ldr r7, [pc, #12] */
+	/* 3 */	0xEF000000 + sys_sigreturn,	/* swi (SYS_sigreturn) */
+	/* 4 */	0xE59F7008,			/* ldr r7, [pc, #8] */
+	/* 5 */	0xEF000000 + sys_exit, 		/* swi (SYS_exit)*/
+	/* 6 */	0xEAFFFFFA,			/* b . -16 */
+	/* 7 */	sys_sigreturn,
+	/* 8 */	sys_exit
+	};
+
+	for(i = 0; i < 8; i++)
+		tswap32s(&sigtramp_code[i]);
+
+	return(memcpy_to_target(offset, sigtramp_code, TARGET_SZSIGCODE));
+}
+
+static inline abi_ulong
+get_sp_from_cpustate(CPUARMState *state)
+{
+    return state->regs[13]; /* sp */
+}
+
+/*
+ * Compare to arm/arm/machdep.c sendsig()
+ * Assumes that the target stack frame memory is locked.
+ */
+static inline int
+set_sigtramp_args(CPUARMState *regs, int sig, struct target_sigframe *frame,
+    abi_ulong frame_addr, struct target_sigaction *ka)
+{
+	/*
+	 * Arguments to signal handler:
+	 * 	r0 = signal number
+	 * 	r1 = siginfo pointer
+	 * 	r2 = ucontext pointer
+	 * 	r5 = ucontext pointer
+	 * 	pc = signal handler pointer
+	 * 	sp = sigframe struct pointer
+	 * 	lr = sigtramp at base of user stack
+	 */
+
+	regs->regs[0] = sig;
+	regs->regs[1] = frame_addr +
+	    offsetof(struct target_sigframe, sf_si);
+	regs->regs[2] = frame_addr +
+	    offsetof(struct target_sigframe, sf_uc);
+
+	/* the trampoline uses r5 as the uc address */
+	regs->regs[5] = frame_addr +
+	    offsetof(struct target_sigframe, sf_uc);
+	regs->regs[TARGET_REG_PC] = ka->_sa_handler;
+	regs->regs[TARGET_REG_SP] = frame_addr;
+	regs->regs[TARGET_REG_LR] = TARGET_PS_STRINGS - TARGET_SZSIGCODE;
+
+	return (0);
+}
+
+/* Compare to arm/arm/machdep.c get_mcontext() */
 static inline int
-get_mcontext(CPUArchState *regs, target_mcontext_t *mcp, int flags)
+get_mcontext(CPUARMState *regs, target_mcontext_t *mcp, int clear_ret)
 {
-	fprintf(stderr, "ARM doesn't have support for get_mcontext()\n");
-	return (-TARGET_ENOSYS);
+	int i, err = 0;
+	uint32_t *gr = mcp->__gregs;
+
+
+	if (clear_ret & TARGET_GET_MC_CLEAR_RET)
+		gr[TARGET_REG_R0] = 0;
+	else
+		gr[TARGET_REG_R0] = tswap32(regs->regs[0]);
+	for(i = 1; i < 12; i++)
+		gr[i] = tswap32(regs->regs[i]);
+	gr[TARGET_REG_SP] = tswap32(regs->regs[13]);
+	gr[TARGET_REG_LR] = tswap32(regs->regs[14]);
+	gr[TARGET_REG_PC] = tswap32(regs->regs[15]);
+	gr[TARGET_REG_CPSR] = tswap32(regs->spsr);
+
+	return (err);
 }
 
+/* Compare to arm/arm/machdep.c set_mcontext() */
 static inline int
-set_mcontext(CPUArchState *regs, target_mcontext_t *mcp, int flags)
+set_mcontext(CPUARMState *regs, target_mcontext_t *mcp, int flags)
 {
-	fprintf(stderr, "ARM doesn't have support for set_mcontext()\n");
-	return (-TARGET_ENOSYS);
+	int i, err = 0;
+	const uint32_t *gr = mcp->__gregs;
+
+	for(i = 0; i < 12; i++)
+		regs->regs[i] =  tswap32(gr[i]);
+	regs->regs[13] = tswap32(gr[TARGET_REG_SP]);
+	regs->regs[14] = tswap32(gr[TARGET_REG_LR]);
+	regs->regs[15] = tswap32(gr[TARGET_REG_PC]);
+	regs->spsr = tswap32(gr[TARGET_REG_CPSR]);
+
+	return (err);
 }
 
 #endif /* TARGET_SIGNAL_H */
diff --git a/bsd-user/arm/target_vmparam.h b/bsd-user/arm/target_vmparam.h
index 24dca00..bc50fbb 100644
--- a/bsd-user/arm/target_vmparam.h
+++ b/bsd-user/arm/target_vmparam.h
@@ -18,8 +18,6 @@ struct target_ps_strings {
 
 #define TARGET_PS_STRINGS  (TARGET_USRSTACK - sizeof(struct target_ps_strings))
 
-#define TARGET_SZSIGCODE 0
-
 /* Make stack size large enough to hold everything. */
 #define TARGET_STACK_SIZE ((x86_stack_size < MAX_ARG_PAGES*TARGET_PAGE_SIZE) ? \
     MAX_ARG_PAGES*TARGET_PAGE_SIZE : x86_stack_size)
diff --git a/bsd-user/elfload.c b/bsd-user/elfload.c
index c2c3a65..76681e1 100644
--- a/bsd-user/elfload.c
+++ b/bsd-user/elfload.c
@@ -690,24 +690,6 @@ static abi_ulong copy_elf_strings(int argc,char ** argv, void **page,
     return p;
 }
 
-#if defined(TARGET_MIPS64)
-static inline int
-install_sigtramp(abi_ulong offset, unsigned sigf_uc, unsigned syscall)
-{
-	int i;
-	uint32_t sigtramp_code[] = {
-		0x67A40000 + sigf_uc,   /* daddu   $a0, $sp, (sigf_uc) */
-		0x24020000 + syscall,   /* li      $v0, (syscall) */
-		0x0000000C,             /* syscall */
-		0x0000000D              /* break */
-	};
-
-	for(i = 0; i < 4; i++)
-		tswap32s(&sigtramp_code[i]);
-
-	return (memcpy_to_target(offset, sigtramp_code, TARGET_SZSIGCODE));
-}
-#endif
 
 static abi_ulong setup_arg_pages(abi_ulong p, struct bsd_binprm *bprm,
                                  struct image_info *info)
diff --git a/bsd-user/mips64/target_signal.h b/bsd-user/mips64/target_signal.h
index c592136..f657909 100644
--- a/bsd-user/mips64/target_signal.h
+++ b/bsd-user/mips64/target_signal.h
@@ -5,7 +5,6 @@
 
 #define	TARGET_MINSIGSTKSZ	(512 * 4)
 #define	TARGET_SIGSTKSZ		(TARGET_MINSIGSTKSZ + 32768)
-#define	TARGET_SZSIGCODE	16
 
 struct target_sigcontext {
 	target_sigset_t	sc_mask;        /* signal mask to retstore */
@@ -56,9 +55,29 @@ get_sp_from_cpustate(CPUMIPSState *state)
     return state->active_tc.gpr[29];
 }
 
+#define	TARGET_SZSIGCODE	(4 * 4)
+
+/* Compare to mips/mips/locore.S sigcode() */
+static inline int
+install_sigtramp(abi_ulong offset, unsigned sigf_uc, unsigned sys_sigreturn)
+{
+	int i;
+	uint32_t sigtramp_code[] = {
+	/* 1 */	0x67A40000 + sigf_uc,		/* daddu   $a0, $sp, (sigf_uc) */
+	/* 2 */	0x24020000 + sys_sigreturn,	/* li      $v0, (sys_sigreturn) */
+	/* 3 */	0x0000000C,             	/* syscall */
+	/* 4 */	0x0000000D              	/* break */
+	};
+
+	for(i = 0; i < 4; i++)
+		tswap32s(&sigtramp_code[i]);
+
+	return (memcpy_to_target(offset, sigtramp_code, TARGET_SZSIGCODE));
+}
+
 /*
  * Compare to mips/mips/pm_machdep.c sendsig()
- * Assumes that "frame" memory is locked.
+ * Assumes that target stack frame memory is locked.
  */
 static inline int
 set_sigtramp_args(CPUMIPSState *regs, int sig, struct target_sigframe *frame,
@@ -67,6 +86,11 @@ set_sigtramp_args(CPUMIPSState *regs, int sig, struct target_sigframe *frame,
 
 	/* frame->sf_si.si_addr = regs->CP0_BadVAddr; */
 
+	/* MIPS only struct target_sigframe members: */
+	frame->sf_signum = sig;
+	frame->sf_siginfo = (abi_ulong)&frame->sf_si;
+	frame->sf_ucontext = (abi_ulong)&frame->sf_uc;
+
 	/*
 	 * Arguments to signal handler:
 	 * 	a0 ($4) = signal number
diff --git a/bsd-user/signal.c b/bsd-user/signal.c
index 29e8e12..b04e874 100644
--- a/bsd-user/signal.c
+++ b/bsd-user/signal.c
@@ -613,7 +613,7 @@ do_sigaction(int sig, const struct target_sigaction *act,
 	return (ret);
 }
 
-#if defined(TARGET_MIPS64) /* || defined(TARGET_SPARC64) */
+#if defined(TARGET_MIPS64) || defined(TARGET_ARM)
 
 static inline abi_ulong
 get_sigframe(struct target_sigaction *ka, CPUArchState *regs, size_t frame_size)
@@ -715,17 +715,8 @@ static void setup_frame(int sig, int code, struct target_sigaction *ka,
 		}
 #endif
 
-		frame->sf_signum = sig;
-		frame->sf_siginfo = (abi_ulong)&frame->sf_si;
-		frame->sf_ucontext = (abi_ulong)&frame->sf_uc;
-
-	} else {
-		frame->sf_signum = sig;
-		frame->sf_siginfo = 0;
-		frame->sf_ucontext = 0;
 	}
 
-
 	if (set_sigtramp_args(regs, sig, frame, frame_addr, ka))
 		goto give_sigsegv;