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-rw-r--r--linux-user/i386/Makefile.vdso11
-rw-r--r--linux-user/i386/cpu_loop.c175
-rw-r--r--linux-user/i386/meson.build7
-rw-r--r--linux-user/i386/signal.c319
-rw-r--r--linux-user/i386/target_elf.h2
-rw-r--r--linux-user/i386/target_mman.h17
-rw-r--r--linux-user/i386/target_prctl.h1
-rw-r--r--linux-user/i386/target_proc.h1
-rw-r--r--linux-user/i386/target_resource.h1
-rw-r--r--linux-user/i386/target_signal.h20
-rw-r--r--linux-user/i386/target_structs.h59
-rw-r--r--linux-user/i386/target_syscall.h1
-rw-r--r--linux-user/i386/vdso-asmoffset.h6
-rw-r--r--linux-user/i386/vdso.S143
-rw-r--r--linux-user/i386/vdso.ld76
-rwxr-xr-xlinux-user/i386/vdso.sobin0 -> 2672 bytes
16 files changed, 582 insertions, 257 deletions
diff --git a/linux-user/i386/Makefile.vdso b/linux-user/i386/Makefile.vdso
new file mode 100644
index 0000000000..95bc616f6d
--- /dev/null
+++ b/linux-user/i386/Makefile.vdso
@@ -0,0 +1,11 @@
+include $(BUILD_DIR)/tests/tcg/i386-linux-user/config-target.mak
+
+SUBDIR = $(SRC_PATH)/linux-user/i386
+VPATH += $(SUBDIR)
+
+all: $(SUBDIR)/vdso.so
+
+$(SUBDIR)/vdso.so: vdso.S vdso.ld vdso-asmoffset.h
+ $(CC) -o $@ -m32 -nostdlib -shared -Wl,-h,linux-gate.so.1 \
+ -Wl,--build-id=sha1 -Wl,--hash-style=both \
+ -Wl,-T,$(SUBDIR)/vdso.ld $<
diff --git a/linux-user/i386/cpu_loop.c b/linux-user/i386/cpu_loop.c
index f6a1cc632b..92beb6830c 100644
--- a/linux-user/i386/cpu_loop.c
+++ b/linux-user/i386/cpu_loop.c
@@ -18,8 +18,8 @@
*/
#include "qemu/osdep.h"
-#include "qemu-common.h"
#include "qemu.h"
+#include "qemu/timer.h"
#include "user-internals.h"
#include "cpu_loop-common.h"
#include "signal-common.h"
@@ -47,7 +47,7 @@ static void write_dt(void *ptr, unsigned long addr, unsigned long limit,
}
static uint64_t *idt_table;
-#ifdef TARGET_X86_64
+
static void set_gate64(void *ptr, unsigned int type, unsigned int dpl,
uint64_t addr, unsigned int sel)
{
@@ -60,8 +60,10 @@ static void set_gate64(void *ptr, unsigned int type, unsigned int dpl,
p[2] = tswap32(addr >> 32);
p[3] = 0;
}
+
+#ifdef TARGET_X86_64
/* only dpl matters as we do only user space emulation */
-static void set_idt(int n, unsigned int dpl)
+static void set_idt(int n, unsigned int dpl, bool is64)
{
set_gate64(idt_table + n * 2, 0, dpl, 0, 0);
}
@@ -78,23 +80,16 @@ static void set_gate(void *ptr, unsigned int type, unsigned int dpl,
}
/* only dpl matters as we do only user space emulation */
-static void set_idt(int n, unsigned int dpl)
+static void set_idt(int n, unsigned int dpl, bool is64)
{
- set_gate(idt_table + n, 0, dpl, 0, 0);
+ if (is64) {
+ set_gate64(idt_table + n * 2, 0, dpl, 0, 0);
+ } else {
+ set_gate(idt_table + n, 0, dpl, 0, 0);
+ }
}
#endif
-static void gen_signal(CPUX86State *env, int sig, int code, abi_ptr addr)
-{
- target_siginfo_t info = {
- .si_signo = sig,
- .si_code = code,
- ._sifields._sigfault._addr = addr
- };
-
- queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info);
-}
-
#ifdef TARGET_X86_64
static bool write_ok_or_segv(CPUX86State *env, abi_ptr addr, size_t len)
{
@@ -107,7 +102,7 @@ static bool write_ok_or_segv(CPUX86State *env, abi_ptr addr, size_t len)
}
env->error_code = PG_ERROR_W_MASK | PG_ERROR_U_MASK;
- gen_signal(env, TARGET_SIGSEGV, TARGET_SEGV_MAPERR, addr);
+ force_sig_fault(TARGET_SIGSEGV, TARGET_SEGV_MAPERR, addr);
return false;
}
@@ -148,7 +143,7 @@ static void emulate_vsyscall(CPUX86State *env)
}
/*
- * Validate the the pointer arguments.
+ * Validate the pointer arguments.
*/
switch (syscall) {
case TARGET_NR_gettimeofday:
@@ -180,8 +175,8 @@ static void emulate_vsyscall(CPUX86State *env)
ret = do_syscall(env, syscall, env->regs[R_EDI], env->regs[R_ESI],
env->regs[R_EDX], env->regs[10], env->regs[8],
env->regs[9], 0, 0);
- g_assert(ret != -TARGET_ERESTARTSYS);
- g_assert(ret != -TARGET_QEMU_ESIGRETURN);
+ g_assert(ret != -QEMU_ERESTARTSYS);
+ g_assert(ret != -QEMU_ESIGRETURN);
if (ret == -TARGET_EFAULT) {
goto sigsegv;
}
@@ -193,16 +188,25 @@ static void emulate_vsyscall(CPUX86State *env)
return;
sigsegv:
- /* Like force_sig(SIGSEGV). */
- gen_signal(env, TARGET_SIGSEGV, TARGET_SI_KERNEL, 0);
+ force_sig(TARGET_SIGSEGV);
}
#endif
+static bool maybe_handle_vm86_trap(CPUX86State *env, int trapnr)
+{
+#ifndef TARGET_X86_64
+ if (env->eflags & VM_MASK) {
+ handle_vm86_trap(env, trapnr);
+ return true;
+ }
+#endif
+ return false;
+}
+
void cpu_loop(CPUX86State *env)
{
CPUState *cs = env_cpu(env);
int trapnr;
- abi_ulong pc;
abi_ulong ret;
for(;;) {
@@ -213,6 +217,9 @@ void cpu_loop(CPUX86State *env)
switch(trapnr) {
case 0x80:
+#ifndef TARGET_X86_64
+ case EXCP_SYSCALL:
+#endif
/* linux syscall from int $0x80 */
ret = do_syscall(env,
env->regs[R_EAX],
@@ -223,15 +230,15 @@ void cpu_loop(CPUX86State *env)
env->regs[R_EDI],
env->regs[R_EBP],
0, 0);
- if (ret == -TARGET_ERESTARTSYS) {
+ if (ret == -QEMU_ERESTARTSYS) {
env->eip -= 2;
- } else if (ret != -TARGET_QEMU_ESIGRETURN) {
+ } else if (ret != -QEMU_ESIGRETURN) {
env->regs[R_EAX] = ret;
}
break;
-#ifndef TARGET_ABI32
+#ifdef TARGET_X86_64
case EXCP_SYSCALL:
- /* linux syscall from syscall instruction */
+ /* linux syscall from syscall instruction. */
ret = do_syscall(env,
env->regs[R_EAX],
env->regs[R_EDI],
@@ -241,110 +248,111 @@ void cpu_loop(CPUX86State *env)
env->regs[8],
env->regs[9],
0, 0);
- if (ret == -TARGET_ERESTARTSYS) {
+ if (ret == -QEMU_ERESTARTSYS) {
env->eip -= 2;
- } else if (ret != -TARGET_QEMU_ESIGRETURN) {
+ } else if (ret != -QEMU_ESIGRETURN) {
env->regs[R_EAX] = ret;
}
break;
-#endif
-#ifdef TARGET_X86_64
case EXCP_VSYSCALL:
emulate_vsyscall(env);
break;
#endif
case EXCP0B_NOSEG:
case EXCP0C_STACK:
- gen_signal(env, TARGET_SIGBUS, TARGET_SI_KERNEL, 0);
+ force_sig(TARGET_SIGBUS);
break;
case EXCP0D_GPF:
/* XXX: potential problem if ABI32 */
-#ifndef TARGET_X86_64
- if (env->eflags & VM_MASK) {
- handle_vm86_fault(env);
+ if (maybe_handle_vm86_trap(env, trapnr)) {
break;
}
-#endif
- gen_signal(env, TARGET_SIGSEGV, TARGET_SI_KERNEL, 0);
+ force_sig(TARGET_SIGSEGV);
break;
case EXCP0E_PAGE:
- gen_signal(env, TARGET_SIGSEGV,
- (env->error_code & 1 ?
- TARGET_SEGV_ACCERR : TARGET_SEGV_MAPERR),
- env->cr[2]);
+ force_sig_fault(TARGET_SIGSEGV,
+ (env->error_code & PG_ERROR_P_MASK ?
+ TARGET_SEGV_ACCERR : TARGET_SEGV_MAPERR),
+ env->cr[2]);
break;
case EXCP00_DIVZ:
-#ifndef TARGET_X86_64
- if (env->eflags & VM_MASK) {
- handle_vm86_trap(env, trapnr);
+ if (maybe_handle_vm86_trap(env, trapnr)) {
break;
}
-#endif
- gen_signal(env, TARGET_SIGFPE, TARGET_FPE_INTDIV, env->eip);
+ force_sig_fault(TARGET_SIGFPE, TARGET_FPE_INTDIV, env->eip);
break;
case EXCP01_DB:
- case EXCP03_INT3:
-#ifndef TARGET_X86_64
- if (env->eflags & VM_MASK) {
- handle_vm86_trap(env, trapnr);
+ if (maybe_handle_vm86_trap(env, trapnr)) {
break;
}
-#endif
- if (trapnr == EXCP01_DB) {
- gen_signal(env, TARGET_SIGTRAP, TARGET_TRAP_BRKPT, env->eip);
- } else {
- gen_signal(env, TARGET_SIGTRAP, TARGET_SI_KERNEL, 0);
+ force_sig_fault(TARGET_SIGTRAP, TARGET_TRAP_BRKPT, env->eip);
+ break;
+ case EXCP03_INT3:
+ if (maybe_handle_vm86_trap(env, trapnr)) {
+ break;
}
+ force_sig(TARGET_SIGTRAP);
break;
case EXCP04_INTO:
case EXCP05_BOUND:
-#ifndef TARGET_X86_64
- if (env->eflags & VM_MASK) {
- handle_vm86_trap(env, trapnr);
+ if (maybe_handle_vm86_trap(env, trapnr)) {
break;
}
-#endif
- gen_signal(env, TARGET_SIGSEGV, TARGET_SI_KERNEL, 0);
+ force_sig(TARGET_SIGSEGV);
break;
case EXCP06_ILLOP:
- gen_signal(env, TARGET_SIGILL, TARGET_ILL_ILLOPN, env->eip);
+ force_sig_fault(TARGET_SIGILL, TARGET_ILL_ILLOPN, env->eip);
break;
case EXCP_INTERRUPT:
/* just indicate that signals should be handled asap */
break;
case EXCP_DEBUG:
- gen_signal(env, TARGET_SIGTRAP, TARGET_TRAP_BRKPT, 0);
+ force_sig_fault(TARGET_SIGTRAP, TARGET_TRAP_BRKPT, env->eip);
break;
case EXCP_ATOMIC:
cpu_exec_step_atomic(cs);
break;
default:
- pc = env->segs[R_CS].base + env->eip;
- EXCP_DUMP(env, "qemu: 0x%08lx: unhandled CPU exception 0x%x - aborting\n",
- (long)pc, trapnr);
+ EXCP_DUMP(env, "qemu: unhandled CPU exception 0x%x - aborting\n",
+ trapnr);
abort();
}
process_pending_signals(env);
}
}
+static void target_cpu_free(void *obj)
+{
+ target_munmap(cpu_env(obj)->gdt.base,
+ sizeof(uint64_t) * TARGET_GDT_ENTRIES);
+ g_free(obj);
+}
+
void target_cpu_copy_regs(CPUArchState *env, struct target_pt_regs *regs)
{
+ CPUState *cpu = env_cpu(env);
+ bool is64 = (env->features[FEAT_8000_0001_EDX] & CPUID_EXT2_LM) != 0;
+ int i;
+
+ OBJECT(cpu)->free = target_cpu_free;
env->cr[0] = CR0_PG_MASK | CR0_WP_MASK | CR0_PE_MASK;
env->hflags |= HF_PE_MASK | HF_CPL_MASK;
if (env->features[FEAT_1_EDX] & CPUID_SSE) {
env->cr[4] |= CR4_OSFXSR_MASK;
env->hflags |= HF_OSFXSR_MASK;
}
-#ifndef TARGET_ABI32
+
/* enable 64 bit mode if possible */
- if (!(env->features[FEAT_8000_0001_EDX] & CPUID_EXT2_LM)) {
+ if (is64) {
+ env->cr[4] |= CR4_PAE_MASK;
+ env->efer |= MSR_EFER_LMA | MSR_EFER_LME;
+ env->hflags |= HF_LMA_MASK;
+ }
+#ifndef TARGET_ABI32
+ else {
fprintf(stderr, "The selected x86 CPU does not support 64 bit mode\n");
exit(EXIT_FAILURE);
}
- env->cr[4] |= CR4_PAE_MASK;
- env->efer |= MSR_EFER_LMA | MSR_EFER_LME;
- env->hflags |= HF_LMA_MASK;
#endif
/* flags setup : we activate the IRQs by default as in user mode */
@@ -383,27 +391,12 @@ void target_cpu_copy_regs(CPUArchState *env, struct target_pt_regs *regs)
PROT_READ|PROT_WRITE,
MAP_ANONYMOUS|MAP_PRIVATE, -1, 0);
idt_table = g2h_untagged(env->idt.base);
- set_idt(0, 0);
- set_idt(1, 0);
- set_idt(2, 0);
- set_idt(3, 3);
- set_idt(4, 3);
- set_idt(5, 0);
- set_idt(6, 0);
- set_idt(7, 0);
- set_idt(8, 0);
- set_idt(9, 0);
- set_idt(10, 0);
- set_idt(11, 0);
- set_idt(12, 0);
- set_idt(13, 0);
- set_idt(14, 0);
- set_idt(15, 0);
- set_idt(16, 0);
- set_idt(17, 0);
- set_idt(18, 0);
- set_idt(19, 0);
- set_idt(0x80, 3);
+ for (i = 0; i < 20; i++) {
+ set_idt(i, 0, is64);
+ }
+ set_idt(3, 3, is64);
+ set_idt(4, 3, is64);
+ set_idt(0x80, 3, is64);
/* linux segment setup */
{
diff --git a/linux-user/i386/meson.build b/linux-user/i386/meson.build
index ee523019a5..d42fc6cbc9 100644
--- a/linux-user/i386/meson.build
+++ b/linux-user/i386/meson.build
@@ -3,3 +3,10 @@ syscall_nr_generators += {
arguments: [ meson.current_source_dir() / 'syscallhdr.sh', '@INPUT@', '@OUTPUT@', '@EXTRA_ARGS@' ],
output: '@BASENAME@_nr.h')
}
+
+vdso_inc = gen_vdso.process('vdso.so', extra_args: [
+ '-s', '__kernel_sigreturn',
+ '-r', '__kernel_rt_sigreturn'
+ ])
+
+linux_user_ss.add(when: 'TARGET_I386', if_true: vdso_inc)
diff --git a/linux-user/i386/signal.c b/linux-user/i386/signal.c
index 3b4b55fc0a..cfe70fc5cf 100644
--- a/linux-user/i386/signal.c
+++ b/linux-user/i386/signal.c
@@ -24,6 +24,10 @@
/* from the Linux kernel - /arch/x86/include/uapi/asm/sigcontext.h */
+#define TARGET_FP_XSTATE_MAGIC1 0x46505853U /* FPXS */
+#define TARGET_FP_XSTATE_MAGIC2 0x46505845U /* FPXE */
+#define TARGET_FP_XSTATE_MAGIC2_SIZE 4
+
struct target_fpreg {
uint16_t significand[4];
uint16_t exponent;
@@ -39,29 +43,16 @@ struct target_xmmreg {
uint32_t element[4];
};
-struct target_fpstate_32 {
- /* Regular FPU environment */
- uint32_t cw;
- uint32_t sw;
- uint32_t tag;
- uint32_t ipoff;
- uint32_t cssel;
- uint32_t dataoff;
- uint32_t datasel;
- struct target_fpreg st[8];
- uint16_t status;
- uint16_t magic; /* 0xffff = regular FPU data only */
-
- /* FXSR FPU environment */
- uint32_t _fxsr_env[6]; /* FXSR FPU env is ignored */
- uint32_t mxcsr;
- uint32_t reserved;
- struct target_fpxreg fxsr_st[8]; /* FXSR FPU reg data is ignored */
- struct target_xmmreg xmm[8];
- uint32_t padding[56];
+struct target_fpx_sw_bytes {
+ uint32_t magic1;
+ uint32_t extended_size;
+ uint64_t xfeatures;
+ uint32_t xstate_size;
+ uint32_t reserved[7];
};
+QEMU_BUILD_BUG_ON(sizeof(struct target_fpx_sw_bytes) != 12*4);
-struct target_fpstate_64 {
+struct target_fpstate_fxsave {
/* FXSAVE format */
uint16_t cw;
uint16_t sw;
@@ -73,13 +64,41 @@ struct target_fpstate_64 {
uint32_t mxcsr_mask;
uint32_t st_space[32];
uint32_t xmm_space[64];
- uint32_t reserved[24];
+ uint32_t hw_reserved[12];
+ struct target_fpx_sw_bytes sw_reserved;
+ uint8_t xfeatures[];
+};
+#define TARGET_FXSAVE_SIZE sizeof(struct target_fpstate_fxsave)
+QEMU_BUILD_BUG_ON(TARGET_FXSAVE_SIZE != 512);
+QEMU_BUILD_BUG_ON(offsetof(struct target_fpstate_fxsave, sw_reserved) != 464);
+
+struct target_fpstate_32 {
+ /* Regular FPU environment */
+ uint32_t cw;
+ uint32_t sw;
+ uint32_t tag;
+ uint32_t ipoff;
+ uint32_t cssel;
+ uint32_t dataoff;
+ uint32_t datasel;
+ struct target_fpreg st[8];
+ uint16_t status;
+ uint16_t magic; /* 0xffff = regular FPU data only */
+ struct target_fpstate_fxsave fxsave;
};
+/*
+ * For simplicity, setup_frame aligns struct target_fpstate_32 to
+ * 16 bytes, so ensure that the FXSAVE area is also aligned.
+ */
+QEMU_BUILD_BUG_ON(offsetof(struct target_fpstate_32, fxsave) & 15);
+
#ifndef TARGET_X86_64
# define target_fpstate target_fpstate_32
+# define TARGET_FPSTATE_FXSAVE_OFFSET offsetof(struct target_fpstate_32, fxsave)
#else
-# define target_fpstate target_fpstate_64
+# define target_fpstate target_fpstate_fxsave
+# define TARGET_FPSTATE_FXSAVE_OFFSET 0
#endif
struct target_sigcontext_32 {
@@ -163,10 +182,25 @@ struct sigframe {
abi_ulong pretcode;
int sig;
struct target_sigcontext sc;
- struct target_fpstate fpstate;
+ /*
+ * The actual fpstate is placed after retcode[] below, to make
+ * room for the variable-sized xsave data. The older unused fpstate
+ * has to be kept to avoid changing the offset of extramask[], which
+ * is part of the ABI.
+ */
+ struct target_fpstate fpstate_unused;
abi_ulong extramask[TARGET_NSIG_WORDS-1];
char retcode[8];
+
+ /*
+ * This field will be 16-byte aligned in memory. Applying QEMU_ALIGNED
+ * to it ensures that the base of the frame has an appropriate alignment
+ * too.
+ */
+ struct target_fpstate fpstate QEMU_ALIGNED(8);
};
+#define TARGET_SIGFRAME_FXSAVE_OFFSET ( \
+ offsetof(struct sigframe, fpstate) + TARGET_FPSTATE_FXSAVE_OFFSET)
struct rt_sigframe {
abi_ulong pretcode;
@@ -175,9 +209,21 @@ struct rt_sigframe {
abi_ulong puc;
struct target_siginfo info;
struct target_ucontext uc;
- struct target_fpstate fpstate;
char retcode[8];
+ struct target_fpstate fpstate QEMU_ALIGNED(8);
};
+#define TARGET_RT_SIGFRAME_FXSAVE_OFFSET ( \
+ offsetof(struct rt_sigframe, fpstate) + TARGET_FPSTATE_FXSAVE_OFFSET)
+
+/*
+ * Verify that vdso-asmoffset.h constants match.
+ */
+#include "i386/vdso-asmoffset.h"
+
+QEMU_BUILD_BUG_ON(offsetof(struct sigframe, sc.eip)
+ != SIGFRAME_SIGCONTEXT_eip);
+QEMU_BUILD_BUG_ON(offsetof(struct rt_sigframe, uc.tuc_mcontext.eip)
+ != RT_SIGFRAME_SIGCONTEXT_eip);
#else
@@ -185,16 +231,51 @@ struct rt_sigframe {
abi_ulong pretcode;
struct target_ucontext uc;
struct target_siginfo info;
- struct target_fpstate fpstate;
+ struct target_fpstate fpstate QEMU_ALIGNED(16);
};
-
+#define TARGET_RT_SIGFRAME_FXSAVE_OFFSET ( \
+ offsetof(struct rt_sigframe, fpstate) + TARGET_FPSTATE_FXSAVE_OFFSET)
#endif
/*
* Set up a signal frame.
*/
-/* XXX: save x87 state */
+static void xsave_sigcontext(CPUX86State *env, struct target_fpstate_fxsave *fxsave,
+ abi_ulong fxsave_addr)
+{
+ if (!(env->features[FEAT_1_ECX] & CPUID_EXT_XSAVE)) {
+ /* fxsave_addr must be 16 byte aligned for fxsave */
+ assert(!(fxsave_addr & 0xf));
+
+ cpu_x86_fxsave(env, fxsave_addr);
+ __put_user(0, &fxsave->sw_reserved.magic1);
+ } else {
+ uint32_t xstate_size = xsave_area_size(env->xcr0, false);
+ uint32_t xfeatures_size = xstate_size - TARGET_FXSAVE_SIZE;
+
+ /*
+ * extended_size is the offset from fpstate_addr to right after the end
+ * of the extended save states. On 32-bit that includes the legacy
+ * FSAVE area.
+ */
+ uint32_t extended_size = TARGET_FPSTATE_FXSAVE_OFFSET
+ + xstate_size + TARGET_FP_XSTATE_MAGIC2_SIZE;
+
+ /* fxsave_addr must be 64 byte aligned for xsave */
+ assert(!(fxsave_addr & 0x3f));
+
+ /* Zero the header, XSAVE *adds* features to an existing save state. */
+ memset(fxsave->xfeatures, 0, 64);
+ cpu_x86_xsave(env, fxsave_addr);
+ __put_user(TARGET_FP_XSTATE_MAGIC1, &fxsave->sw_reserved.magic1);
+ __put_user(extended_size, &fxsave->sw_reserved.extended_size);
+ __put_user(env->xcr0, &fxsave->sw_reserved.xfeatures);
+ __put_user(xstate_size, &fxsave->sw_reserved.xstate_size);
+ __put_user(TARGET_FP_XSTATE_MAGIC2, (uint32_t *) &fxsave->xfeatures[xfeatures_size]);
+ }
+}
+
static void setup_sigcontext(struct target_sigcontext *sc,
struct target_fpstate *fpstate, CPUX86State *env, abi_ulong mask,
abi_ulong fpstate_addr)
@@ -226,13 +307,14 @@ static void setup_sigcontext(struct target_sigcontext *sc,
cpu_x86_fsave(env, fpstate_addr, 1);
fpstate->status = fpstate->sw;
- magic = 0xffff;
+ if (!(env->features[FEAT_1_EDX] & CPUID_FXSR)) {
+ magic = 0xffff;
+ } else {
+ xsave_sigcontext(env, &fpstate->fxsave,
+ fpstate_addr + TARGET_FPSTATE_FXSAVE_OFFSET);
+ magic = 0;
+ }
__put_user(magic, &fpstate->magic);
- __put_user(fpstate_addr, &sc->fpstate);
-
- /* non-iBCS2 extensions.. */
- __put_user(mask, &sc->oldmask);
- __put_user(env->cr[2], &sc->cr2);
#else
__put_user(env->regs[R_EDI], &sc->rdi);
__put_user(env->regs[R_ESI], &sc->rsi);
@@ -262,15 +344,14 @@ static void setup_sigcontext(struct target_sigcontext *sc,
__put_user((uint16_t)0, &sc->fs);
__put_user(env->segs[R_SS].selector, &sc->ss);
- __put_user(mask, &sc->oldmask);
- __put_user(env->cr[2], &sc->cr2);
-
- /* fpstate_addr must be 16 byte aligned for fxsave */
- assert(!(fpstate_addr & 0xf));
+ xsave_sigcontext(env, fpstate, fpstate_addr);
+#endif
- cpu_x86_fxsave(env, fpstate_addr);
__put_user(fpstate_addr, &sc->fpstate);
-#endif
+
+ /* non-iBCS2 extensions.. */
+ __put_user(mask, &sc->oldmask);
+ __put_user(env->cr[2], &sc->cr2);
}
/*
@@ -278,7 +359,7 @@ static void setup_sigcontext(struct target_sigcontext *sc,
*/
static inline abi_ulong
-get_sigframe(struct target_sigaction *ka, CPUX86State *env, size_t frame_size)
+get_sigframe(struct target_sigaction *ka, CPUX86State *env, size_t fxsave_offset)
{
unsigned long esp;
@@ -302,14 +383,34 @@ get_sigframe(struct target_sigaction *ka, CPUX86State *env, size_t frame_size)
#endif
}
-#ifndef TARGET_X86_64
- return (esp - frame_size) & -8ul;
-#else
- return ((esp - frame_size) & (~15ul)) - 8;
-#endif
+ if (!(env->features[FEAT_1_EDX] & CPUID_FXSR)) {
+ return (esp - (fxsave_offset + TARGET_FXSAVE_SIZE)) & -8ul;
+ } else if (!(env->features[FEAT_1_ECX] & CPUID_EXT_XSAVE)) {
+ return ((esp - TARGET_FXSAVE_SIZE) & -16ul) - fxsave_offset;
+ } else {
+ size_t xstate_size =
+ xsave_area_size(env->xcr0, false) + TARGET_FP_XSTATE_MAGIC2_SIZE;
+ return ((esp - xstate_size) & -64ul) - fxsave_offset;
+ }
}
#ifndef TARGET_X86_64
+static void install_sigtramp(void *tramp)
+{
+ /* This is popl %eax ; movl $syscall,%eax ; int $0x80 */
+ __put_user(0xb858, (uint16_t *)(tramp + 0));
+ __put_user(TARGET_NR_sigreturn, (int32_t *)(tramp + 2));
+ __put_user(0x80cd, (uint16_t *)(tramp + 6));
+}
+
+static void install_rt_sigtramp(void *tramp)
+{
+ /* This is movl $syscall,%eax ; int $0x80 */
+ __put_user(0xb8, (uint8_t *)(tramp + 0));
+ __put_user(TARGET_NR_rt_sigreturn, (int32_t *)(tramp + 1));
+ __put_user(0x80cd, (uint16_t *)(tramp + 5));
+}
+
/* compare linux/arch/i386/kernel/signal.c:setup_frame() */
void setup_frame(int sig, struct target_sigaction *ka,
target_sigset_t *set, CPUX86State *env)
@@ -318,7 +419,7 @@ void setup_frame(int sig, struct target_sigaction *ka,
struct sigframe *frame;
int i;
- frame_addr = get_sigframe(ka, env, sizeof(*frame));
+ frame_addr = get_sigframe(ka, env, TARGET_SIGFRAME_FXSAVE_OFFSET);
trace_user_setup_frame(env, frame_addr);
if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0))
@@ -329,7 +430,7 @@ void setup_frame(int sig, struct target_sigaction *ka,
setup_sigcontext(&frame->sc, &frame->fpstate, env, set->sig[0],
frame_addr + offsetof(struct sigframe, fpstate));
- for(i = 1; i < TARGET_NSIG_WORDS; i++) {
+ for (i = 1; i < TARGET_NSIG_WORDS; i++) {
__put_user(set->sig[i], &frame->extramask[i - 1]);
}
@@ -338,16 +439,9 @@ void setup_frame(int sig, struct target_sigaction *ka,
if (ka->sa_flags & TARGET_SA_RESTORER) {
__put_user(ka->sa_restorer, &frame->pretcode);
} else {
- uint16_t val16;
- abi_ulong retcode_addr;
- retcode_addr = frame_addr + offsetof(struct sigframe, retcode);
- __put_user(retcode_addr, &frame->pretcode);
- /* This is popl %eax ; movl $,%eax ; int $0x80 */
- val16 = 0xb858;
- __put_user(val16, (uint16_t *)(frame->retcode+0));
- __put_user(TARGET_NR_sigreturn, (int *)(frame->retcode+2));
- val16 = 0x80cd;
- __put_user(val16, (uint16_t *)(frame->retcode+6));
+ /* This is no longer used, but is retained for ABI compatibility. */
+ install_sigtramp(frame->retcode);
+ __put_user(default_sigreturn, &frame->pretcode);
}
/* Set up registers for signal handler */
@@ -381,7 +475,7 @@ void setup_rt_frame(int sig, struct target_sigaction *ka,
struct rt_sigframe *frame;
int i;
- frame_addr = get_sigframe(ka, env, sizeof(*frame));
+ frame_addr = get_sigframe(ka, env, TARGET_RT_SIGFRAME_FXSAVE_OFFSET);
trace_user_setup_rt_frame(env, frame_addr);
if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0))
@@ -396,40 +490,38 @@ void setup_rt_frame(int sig, struct target_sigaction *ka,
__put_user(addr, &frame->puc);
#endif
if (ka->sa_flags & TARGET_SA_SIGINFO) {
- tswap_siginfo(&frame->info, info);
+ frame->info = *info;
}
/* Create the ucontext. */
- __put_user(0, &frame->uc.tuc_flags);
+ if (env->features[FEAT_1_ECX] & CPUID_EXT_XSAVE) {
+ __put_user(1, &frame->uc.tuc_flags);
+ } else {
+ __put_user(0, &frame->uc.tuc_flags);
+ }
__put_user(0, &frame->uc.tuc_link);
target_save_altstack(&frame->uc.tuc_stack, env);
setup_sigcontext(&frame->uc.tuc_mcontext, &frame->fpstate, env,
set->sig[0], frame_addr + offsetof(struct rt_sigframe, fpstate));
- for(i = 0; i < TARGET_NSIG_WORDS; i++) {
+ for (i = 0; i < TARGET_NSIG_WORDS; i++) {
__put_user(set->sig[i], &frame->uc.tuc_sigmask.sig[i]);
}
/* Set up to return from userspace. If provided, use a stub
already in userspace. */
-#ifndef TARGET_X86_64
if (ka->sa_flags & TARGET_SA_RESTORER) {
__put_user(ka->sa_restorer, &frame->pretcode);
} else {
- uint16_t val16;
- addr = frame_addr + offsetof(struct rt_sigframe, retcode);
- __put_user(addr, &frame->pretcode);
- /* This is movl $,%eax ; int $0x80 */
- __put_user(0xb8, (char *)(frame->retcode+0));
- __put_user(TARGET_NR_rt_sigreturn, (int *)(frame->retcode+1));
- val16 = 0x80cd;
- __put_user(val16, (uint16_t *)(frame->retcode+5));
- }
+#ifdef TARGET_X86_64
+ /* For x86_64, SA_RESTORER is required ABI. */
+ goto give_sigsegv;
#else
- /* XXX: Would be slightly better to return -EFAULT here if test fails
- assert(ka->sa_flags & TARGET_SA_RESTORER); */
- __put_user(ka->sa_restorer, &frame->pretcode);
+ /* This is no longer used, but is retained for ABI compatibility. */
+ install_rt_sigtramp(frame->retcode);
+ __put_user(default_rt_sigreturn, &frame->pretcode);
#endif
+ }
/* Set up registers for signal handler */
env->regs[R_ESP] = frame_addr;
@@ -460,10 +552,37 @@ give_sigsegv:
force_sigsegv(sig);
}
+static int xrstor_sigcontext(CPUX86State *env, struct target_fpstate_fxsave *fxsave,
+ abi_ulong fxsave_addr)
+{
+ if (env->features[FEAT_1_ECX] & CPUID_EXT_XSAVE) {
+ uint32_t extended_size = tswapl(fxsave->sw_reserved.extended_size);
+ uint32_t xstate_size = tswapl(fxsave->sw_reserved.xstate_size);
+ uint32_t xfeatures_size = xstate_size - TARGET_FXSAVE_SIZE;
+
+ /* Linux checks MAGIC2 using xstate_size, not extended_size. */
+ if (tswapl(fxsave->sw_reserved.magic1) == TARGET_FP_XSTATE_MAGIC1 &&
+ extended_size >= TARGET_FPSTATE_FXSAVE_OFFSET + xstate_size + TARGET_FP_XSTATE_MAGIC2_SIZE) {
+ if (!access_ok(env_cpu(env), VERIFY_READ, fxsave_addr,
+ extended_size - TARGET_FPSTATE_FXSAVE_OFFSET)) {
+ return 1;
+ }
+ if (tswapl(*(uint32_t *) &fxsave->xfeatures[xfeatures_size]) == TARGET_FP_XSTATE_MAGIC2) {
+ cpu_x86_xrstor(env, fxsave_addr);
+ return 0;
+ }
+ }
+ /* fall through to fxrstor */
+ }
+
+ cpu_x86_fxrstor(env, fxsave_addr);
+ return 0;
+}
+
static int
restore_sigcontext(CPUX86State *env, struct target_sigcontext *sc)
{
- unsigned int err = 0;
+ int err = 1;
abi_ulong fpstate_addr;
unsigned int tmpflags;
@@ -514,20 +633,28 @@ restore_sigcontext(CPUX86State *env, struct target_sigcontext *sc)
fpstate_addr = tswapl(sc->fpstate);
if (fpstate_addr != 0) {
- if (!access_ok(env_cpu(env), VERIFY_READ, fpstate_addr,
- sizeof(struct target_fpstate))) {
- goto badframe;
+ struct target_fpstate *fpstate;
+ if (!lock_user_struct(VERIFY_READ, fpstate, fpstate_addr,
+ sizeof(struct target_fpstate))) {
+ return err;
}
#ifndef TARGET_X86_64
- cpu_x86_frstor(env, fpstate_addr, 1);
+ if (!(env->features[FEAT_1_EDX] & CPUID_FXSR)) {
+ cpu_x86_frstor(env, fpstate_addr, 1);
+ err = 0;
+ } else {
+ err = xrstor_sigcontext(env, &fpstate->fxsave,
+ fpstate_addr + TARGET_FPSTATE_FXSAVE_OFFSET);
+ }
#else
- cpu_x86_fxrstor(env, fpstate_addr);
+ err = xrstor_sigcontext(env, fpstate, fpstate_addr);
#endif
+ unlock_user_struct(fpstate, fpstate_addr, 0);
+ } else {
+ err = 0;
}
return err;
-badframe:
- return 1;
}
/* Note: there is no sigreturn on x86_64, there is only rt_sigreturn */
@@ -556,12 +683,12 @@ long do_sigreturn(CPUX86State *env)
if (restore_sigcontext(env, &frame->sc))
goto badframe;
unlock_user_struct(frame, frame_addr, 0);
- return -TARGET_QEMU_ESIGRETURN;
+ return -QEMU_ESIGRETURN;
badframe:
unlock_user_struct(frame, frame_addr, 0);
force_sig(TARGET_SIGSEGV);
- return -TARGET_QEMU_ESIGRETURN;
+ return -QEMU_ESIGRETURN;
}
#endif
@@ -585,10 +712,26 @@ long do_rt_sigreturn(CPUX86State *env)
target_restore_altstack(&frame->uc.tuc_stack, env);
unlock_user_struct(frame, frame_addr, 0);
- return -TARGET_QEMU_ESIGRETURN;
+ return -QEMU_ESIGRETURN;
badframe:
unlock_user_struct(frame, frame_addr, 0);
force_sig(TARGET_SIGSEGV);
- return -TARGET_QEMU_ESIGRETURN;
+ return -QEMU_ESIGRETURN;
+}
+
+#ifndef TARGET_X86_64
+void setup_sigtramp(abi_ulong sigtramp_page)
+{
+ uint16_t *tramp = lock_user(VERIFY_WRITE, sigtramp_page, 2 * 8, 0);
+ assert(tramp != NULL);
+
+ default_sigreturn = sigtramp_page;
+ install_sigtramp(tramp);
+
+ default_rt_sigreturn = sigtramp_page + 8;
+ install_rt_sigtramp(tramp + 8);
+
+ unlock_user(tramp, sigtramp_page, 2 * 8);
}
+#endif
diff --git a/linux-user/i386/target_elf.h b/linux-user/i386/target_elf.h
index 1c6142e7da..238a9aba73 100644
--- a/linux-user/i386/target_elf.h
+++ b/linux-user/i386/target_elf.h
@@ -9,6 +9,6 @@
#define I386_TARGET_ELF_H
static inline const char *cpu_get_model(uint32_t eflags)
{
- return "qemu32";
+ return "max";
}
#endif
diff --git a/linux-user/i386/target_mman.h b/linux-user/i386/target_mman.h
new file mode 100644
index 0000000000..e3b8e1eaa6
--- /dev/null
+++ b/linux-user/i386/target_mman.h
@@ -0,0 +1,17 @@
+/*
+ * arch/x86/include/asm/processor.h:
+ * TASK_UNMAPPED_BASE __TASK_UNMAPPED_BASE(TASK_SIZE_LOW)
+ * __TASK_UNMAPPED_BASE(S) PAGE_ALIGN(S / 3)
+ *
+ * arch/x86/include/asm/page_32_types.h:
+ * TASK_SIZE_LOW TASK_SIZE
+ * TASK_SIZE __PAGE_OFFSET
+ * __PAGE_OFFSET CONFIG_PAGE_OFFSET
+ * CONFIG_PAGE_OFFSET 0xc0000000 (default in Kconfig)
+ */
+#define TASK_UNMAPPED_BASE 0x40000000
+
+/* arch/x86/include/asm/elf.h */
+#define ELF_ET_DYN_BASE 0x00400000
+
+#include "../generic/target_mman.h"
diff --git a/linux-user/i386/target_prctl.h b/linux-user/i386/target_prctl.h
new file mode 100644
index 0000000000..eb53b31ad5
--- /dev/null
+++ b/linux-user/i386/target_prctl.h
@@ -0,0 +1 @@
+/* No special prctl support required. */
diff --git a/linux-user/i386/target_proc.h b/linux-user/i386/target_proc.h
new file mode 100644
index 0000000000..43fe29ca72
--- /dev/null
+++ b/linux-user/i386/target_proc.h
@@ -0,0 +1 @@
+/* No target-specific /proc support */
diff --git a/linux-user/i386/target_resource.h b/linux-user/i386/target_resource.h
new file mode 100644
index 0000000000..227259594c
--- /dev/null
+++ b/linux-user/i386/target_resource.h
@@ -0,0 +1 @@
+#include "../generic/target_resource.h"
diff --git a/linux-user/i386/target_signal.h b/linux-user/i386/target_signal.h
index 50361af874..9315cba241 100644
--- a/linux-user/i386/target_signal.h
+++ b/linux-user/i386/target_signal.h
@@ -1,25 +1,9 @@
#ifndef I386_TARGET_SIGNAL_H
#define I386_TARGET_SIGNAL_H
-/* this struct defines a stack used during syscall handling */
-
-typedef struct target_sigaltstack {
- abi_ulong ss_sp;
- abi_int ss_flags;
- abi_ulong ss_size;
-} target_stack_t;
-
-
-/*
- * sigaltstack controls
- */
-#define TARGET_SS_ONSTACK 1
-#define TARGET_SS_DISABLE 2
-
-#define TARGET_MINSIGSTKSZ 2048
-#define TARGET_SIGSTKSZ 8192
-
#include "../generic/signal.h"
#define TARGET_ARCH_HAS_SETUP_FRAME
+#define TARGET_ARCH_HAS_SIGTRAMP_PAGE 1
+
#endif /* I386_TARGET_SIGNAL_H */
diff --git a/linux-user/i386/target_structs.h b/linux-user/i386/target_structs.h
index e22847fd20..3a06f373c3 100644
--- a/linux-user/i386/target_structs.h
+++ b/linux-user/i386/target_structs.h
@@ -1,58 +1 @@
-/*
- * i386 specific structures for linux-user
- *
- * Copyright (c) 2013 Fabrice Bellard
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, see <http://www.gnu.org/licenses/>.
- */
-#ifndef I386_TARGET_STRUCTS_H
-#define I386_TARGET_STRUCTS_H
-
-struct target_ipc_perm {
- abi_int __key; /* Key. */
- abi_uint uid; /* Owner's user ID. */
- abi_uint gid; /* Owner's group ID. */
- abi_uint cuid; /* Creator's user ID. */
- abi_uint cgid; /* Creator's group ID. */
- abi_ushort mode; /* Read/write permission. */
- abi_ushort __pad1;
- abi_ushort __seq; /* Sequence number. */
- abi_ushort __pad2;
- abi_ulong __unused1;
- abi_ulong __unused2;
-};
-
-struct target_shmid_ds {
- struct target_ipc_perm shm_perm; /* operation permission struct */
- abi_long shm_segsz; /* size of segment in bytes */
- abi_ulong shm_atime; /* time of last shmat() */
-#if TARGET_ABI_BITS == 32
- abi_ulong __unused1;
-#endif
- abi_ulong shm_dtime; /* time of last shmdt() */
-#if TARGET_ABI_BITS == 32
- abi_ulong __unused2;
-#endif
- abi_ulong shm_ctime; /* time of last change by shmctl() */
-#if TARGET_ABI_BITS == 32
- abi_ulong __unused3;
-#endif
- abi_int shm_cpid; /* pid of creator */
- abi_int shm_lpid; /* pid of last shmop */
- abi_ulong shm_nattch; /* number of current attaches */
- abi_ulong __unused4;
- abi_ulong __unused5;
-};
-
-#endif
+#include "../generic/target_structs.h"
diff --git a/linux-user/i386/target_syscall.h b/linux-user/i386/target_syscall.h
index ed356b3908..aaade06b13 100644
--- a/linux-user/i386/target_syscall.h
+++ b/linux-user/i386/target_syscall.h
@@ -150,7 +150,6 @@ struct target_vm86plus_struct {
#define UNAME_MINIMUM_RELEASE "2.6.32"
#define TARGET_CLONE_BACKWARDS
-#define TARGET_MINSIGSTKSZ 2048
#define TARGET_MCL_CURRENT 1
#define TARGET_MCL_FUTURE 2
#define TARGET_MCL_ONFAULT 4
diff --git a/linux-user/i386/vdso-asmoffset.h b/linux-user/i386/vdso-asmoffset.h
new file mode 100644
index 0000000000..4e5ee0dd49
--- /dev/null
+++ b/linux-user/i386/vdso-asmoffset.h
@@ -0,0 +1,6 @@
+/*
+ * offsetof(struct sigframe, sc.eip)
+ * offsetof(struct rt_sigframe, uc.tuc_mcontext.eip)
+ */
+#define SIGFRAME_SIGCONTEXT_eip 64
+#define RT_SIGFRAME_SIGCONTEXT_eip 220
diff --git a/linux-user/i386/vdso.S b/linux-user/i386/vdso.S
new file mode 100644
index 0000000000..e7a1f333a1
--- /dev/null
+++ b/linux-user/i386/vdso.S
@@ -0,0 +1,143 @@
+/*
+ * i386 linux replacement vdso.
+ *
+ * Copyright 2023 Linaro, Ltd.
+ *
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ */
+
+#include <asm/unistd.h>
+#include "vdso-asmoffset.h"
+
+.macro endf name
+ .globl \name
+ .type \name, @function
+ .size \name, . - \name
+.endm
+
+.macro vdso_syscall1 name, nr
+\name:
+ .cfi_startproc
+ mov %ebx, %edx
+ .cfi_register %ebx, %edx
+ mov 4(%esp), %ebx
+ mov $\nr, %eax
+ int $0x80
+ mov %edx, %ebx
+ ret
+ .cfi_endproc
+endf \name
+.endm
+
+.macro vdso_syscall2 name, nr
+\name:
+ .cfi_startproc
+ mov %ebx, %edx
+ .cfi_register %ebx, %edx
+ mov 4(%esp), %ebx
+ mov 8(%esp), %ecx
+ mov $\nr, %eax
+ int $0x80
+ mov %edx, %ebx
+ ret
+ .cfi_endproc
+endf \name
+.endm
+
+.macro vdso_syscall3 name, nr
+\name:
+ .cfi_startproc
+ push %ebx
+ .cfi_adjust_cfa_offset 4
+ .cfi_rel_offset %ebx, 0
+ mov 8(%esp), %ebx
+ mov 12(%esp), %ecx
+ mov 16(%esp), %edx
+ mov $\nr, %eax
+ int $0x80
+ pop %ebx
+ .cfi_adjust_cfa_offset -4
+ .cfi_restore %ebx
+ ret
+ .cfi_endproc
+endf \name
+.endm
+
+__kernel_vsyscall:
+ .cfi_startproc
+ int $0x80
+ ret
+ .cfi_endproc
+endf __kernel_vsyscall
+
+vdso_syscall2 __vdso_clock_gettime, __NR_clock_gettime
+vdso_syscall2 __vdso_clock_gettime64, __NR_clock_gettime64
+vdso_syscall2 __vdso_clock_getres, __NR_clock_getres
+vdso_syscall2 __vdso_gettimeofday, __NR_gettimeofday
+vdso_syscall1 __vdso_time, __NR_time
+vdso_syscall3 __vdso_getcpu, __NR_gettimeofday
+
+/*
+ * Signal return handlers.
+ */
+
+ .cfi_startproc simple
+ .cfi_signal_frame
+
+/*
+ * For convenience, put the cfa just above eip in sigcontext, and count
+ * offsets backward from there. Re-compute the cfa in the two contexts
+ * we have for signal unwinding. This is far simpler than the
+ * DW_CFA_expression form that the kernel uses, and is equally correct.
+ */
+
+ .cfi_def_cfa %esp, SIGFRAME_SIGCONTEXT_eip + 4
+
+ .cfi_offset %eip, -4
+ /* err, -8 */
+ /* trapno, -12 */
+ .cfi_offset %eax, -16
+ .cfi_offset %ecx, -20
+ .cfi_offset %edx, -24
+ .cfi_offset %ebx, -28
+ .cfi_offset %esp, -32
+ .cfi_offset %ebp, -36
+ .cfi_offset %esi, -40
+ .cfi_offset %edi, -44
+
+/*
+ * While this frame is marked as a signal frame, that only applies to how
+ * the return address is handled for the outer frame. The return address
+ * that arrived here, from the inner frame, is not marked as a signal frame
+ * and so the unwinder still tries to subtract 1 to examine the presumed
+ * call insn. Thus we must extend the unwind info to a nop before the start.
+ */
+ nop
+
+__kernel_sigreturn:
+ popl %eax /* pop sig */
+ .cfi_adjust_cfa_offset -4
+ movl $__NR_sigreturn, %eax
+ int $0x80
+endf __kernel_sigreturn
+
+ .cfi_def_cfa_offset RT_SIGFRAME_SIGCONTEXT_eip + 4
+ nop
+
+__kernel_rt_sigreturn:
+ movl $__NR_rt_sigreturn, %eax
+ int $0x80
+endf __kernel_rt_sigreturn
+
+ .cfi_endproc
+
+/*
+ * TODO: Add elf notes. E.g.
+ *
+ * #include <linux/elfnote.h>
+ * ELFNOTE_START(Linux, 0, "a")
+ * .long LINUX_VERSION_CODE
+ * ELFNOTE_END
+ *
+ * but what version number would we set for QEMU?
+ */
diff --git a/linux-user/i386/vdso.ld b/linux-user/i386/vdso.ld
new file mode 100644
index 0000000000..326b7a8f98
--- /dev/null
+++ b/linux-user/i386/vdso.ld
@@ -0,0 +1,76 @@
+/*
+ * Linker script for linux i386 replacement vdso.
+ *
+ * Copyright 2023 Linaro, Ltd.
+ *
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ */
+
+ENTRY(__kernel_vsyscall)
+
+VERSION {
+ LINUX_2.6 {
+ global:
+ __vdso_clock_gettime;
+ __vdso_gettimeofday;
+ __vdso_time;
+ __vdso_clock_getres;
+ __vdso_clock_gettime64;
+ __vdso_getcpu;
+ };
+
+ LINUX_2.5 {
+ global:
+ __kernel_vsyscall;
+ __kernel_sigreturn;
+ __kernel_rt_sigreturn;
+ local: *;
+ };
+}
+
+PHDRS {
+ phdr PT_PHDR FLAGS(4) PHDRS;
+ load PT_LOAD FLAGS(7) FILEHDR PHDRS; /* FLAGS=RWX */
+ dynamic PT_DYNAMIC FLAGS(4);
+ eh_frame_hdr PT_GNU_EH_FRAME;
+ note PT_NOTE FLAGS(4);
+}
+
+SECTIONS {
+ . = SIZEOF_HEADERS;
+
+ /*
+ * The following, including the FILEHDRS and PHDRS, are modified
+ * when we relocate the binary. We want them to be initially
+ * writable for the relocation; we'll force them read-only after.
+ */
+ .note : { *(.note*) } :load :note
+ .dynamic : { *(.dynamic) } :load :dynamic
+ .dynsym : { *(.dynsym) } :load
+ .data : {
+ /*
+ * There ought not be any real read-write data.
+ * But since we manipulated the segment layout,
+ * we have to put these sections somewhere.
+ */
+ *(.data*)
+ *(.sdata*)
+ *(.got.plt) *(.got)
+ *(.gnu.linkonce.d.*)
+ *(.bss*)
+ *(.dynbss*)
+ *(.gnu.linkonce.b.*)
+ }
+
+ .rodata : { *(.rodata*) }
+ .hash : { *(.hash) }
+ .gnu.hash : { *(.gnu.hash) }
+ .dynstr : { *(.dynstr) }
+ .gnu.version : { *(.gnu.version) }
+ .gnu.version_d : { *(.gnu.version_d) }
+ .gnu.version_r : { *(.gnu.version_r) }
+ .eh_frame_hdr : { *(.eh_frame_hdr) } :load :eh_frame_hdr
+ .eh_frame : { *(.eh_frame) } :load
+
+ .text : { *(.text*) } :load =0x90909090
+}
diff --git a/linux-user/i386/vdso.so b/linux-user/i386/vdso.so
new file mode 100755
index 0000000000..bdece5dfcf
--- /dev/null
+++ b/linux-user/i386/vdso.so
Binary files differ
generated by cgit v1.2.3 (git 2.25.1) at 2024-04-28 03:22:13 +0000