Android/i686 support

src/linux/android.rs

@@ -116,7 +116,7 @@ fn parse_loaded_elf_program_headers(
 pub fn late_process_mappings(pid: Pid, mappings: &mut [MappingInfo]) -> Result<()> {
     // Only consider exec mappings that indicate a file path was mapped, and
     // where the ELF header indicates a mapped shared library.
-    for mut map in mappings
+    for map in mappings
         .iter_mut()
         .filter(|m| m.is_executable() && m.name_is_path())
     {

src/linux/auxv_reader.rs

@@ -85,11 +85,11 @@ impl Iterator for ProcfsAuxvIter {
         };
 
         let at_null;
-        #[cfg(target_arch = "arm")]
+        #[cfg(any(target_arch = "arm", all(target_os = "android", target_arch = "x86")))]
         {
             at_null = 0;
         }
-        #[cfg(not(target_arch = "arm"))]
+        #[cfg(not(any(target_arch = "arm", all(target_os = "android", target_arch = "x86"))))]
         {
             at_null = libc::AT_NULL;
         }

src/linux/crash_context/x86.rs

@@ -41,7 +41,7 @@ impl CrashContext {
 
         {
             let fs = &self.inner.float_state;
-            let mut out = &mut out.float_save;
+            let out = &mut out.float_save;
             out.control_word = fs.cw;
             out.status_word = fs.sw;
             out.tag_word = fs.tag;

src/linux/dso_debug.rs

@@ -81,12 +81,12 @@ pub fn write_dso_debug_stream(
 ) -> Result<MDRawDirectory> {
     let at_phnum;
     let at_phdr;
-    #[cfg(target_arch = "arm")]
+    #[cfg(any(target_arch = "arm", all(target_os = "android", target_arch = "x86")))]
     {
         at_phdr = 3;
         at_phnum = 5;
     }
-    #[cfg(not(target_arch = "arm"))]
+    #[cfg(not(any(target_arch = "arm", all(target_os = "android", target_arch = "x86"))))]
     {
         at_phdr = libc::AT_PHDR;
         at_phnum = libc::AT_PHNUM;

src/linux/dumper_cpu_info/x86_mips.rs

@@ -67,7 +67,7 @@ pub fn write_cpu_information(sys_info: &mut MDRawSystemInfo) -> Result<()> {
         };
 
         let mut is_first_entry = true;
-        for mut entry in cpu_info_table.iter_mut() {
+        for entry in cpu_info_table.iter_mut() {
             if !is_first_entry && entry.found {
                 // except for the 'processor' field, ignore repeated values.
                 continue;

src/linux/ptrace_dumper.rs

@@ -268,11 +268,11 @@ impl PtraceDumper {
         // guaranteed (see http://crosbug.com/25355); therefore, try to use the
         // actual entry point to find the mapping.
         let at_entry;
-        #[cfg(target_arch = "arm")]
+        #[cfg(any(target_arch = "arm", all(target_os = "android", target_arch = "x86")))]
         {
             at_entry = 9;
         }
-        #[cfg(not(target_arch = "arm"))]
+        #[cfg(not(any(target_arch = "arm", all(target_os = "android", target_arch = "x86"))))]
         {
             at_entry = libc::AT_ENTRY;
         }

src/linux/thread_info/x86.rs

@@ -1,41 +1,124 @@
 use super::{CommonThreadInfo, NT_Elf, Pid};
 use crate::{errors::ThreadInfoError, minidump_cpu::RawContextCPU, minidump_format::format};
 use core::mem::size_of_val;
-use libc::user;
+#[cfg(all(not(target_os = "android"), target_arch = "x86"))]
+use libc::user_fpxregs_struct;
+#[cfg(not(all(target_os = "android", target_arch = "x86")))]
+use libc::{user, user_fpregs_struct, user_regs_struct};
 use nix::sys::ptrace;
 use scroll::Pwrite;
 
 type Result<T> = std::result::Result<T, ThreadInfoError>;
 
+// Not defined by libc on Android
+#[cfg(all(target_os = "android", target_arch = "x86"))]
+#[allow(non_camel_case_types)]
+#[repr(C)]
+pub struct user_regs_struct {
+    pub ebx: libc::c_long,
+    pub ecx: libc::c_long,
+    pub edx: libc::c_long,
+    pub esi: libc::c_long,
+    pub edi: libc::c_long,
+    pub ebp: libc::c_long,
+    pub eax: libc::c_long,
+    pub xds: libc::c_long,
+    pub xes: libc::c_long,
+    pub xfs: libc::c_long,
+    pub xgs: libc::c_long,
+    pub orig_eax: libc::c_long,
+    pub eip: libc::c_long,
+    pub xcs: libc::c_long,
+    pub eflags: libc::c_long,
+    pub esp: libc::c_long,
+    pub xss: libc::c_long,
+}
+
+// Not defined by libc on Android
+#[cfg(all(target_os = "android", target_arch = "x86"))]
+#[allow(non_camel_case_types)]
+#[repr(C)]
+pub struct user_fpxregs_struct {
+    pub cwd: libc::c_ushort,
+    pub swd: libc::c_ushort,
+    pub twd: libc::c_ushort,
+    pub fop: libc::c_ushort,
+    pub fip: libc::c_long,
+    pub fcs: libc::c_long,
+    pub foo: libc::c_long,
+    pub fos: libc::c_long,
+    pub mxcsr: libc::c_long,
+    __reserved: libc::c_long,
+    pub st_space: [libc::c_long; 32],
+    pub xmm_space: [libc::c_long; 32],
+    padding: [libc::c_long; 56],
+}
+
+// Not defined by libc on Android
+#[cfg(all(target_os = "android", target_arch = "x86"))]
+#[allow(non_camel_case_types)]
+#[repr(C)]
+pub struct user_fpregs_struct {
+    pub cwd: libc::c_long,
+    pub swd: libc::c_long,
+    pub twd: libc::c_long,
+    pub fip: libc::c_long,
+    pub fcs: libc::c_long,
+    pub foo: libc::c_long,
+    pub fos: libc::c_long,
+    pub st_space: [libc::c_long; 20],
+}
+
+#[cfg(all(target_os = "android", target_arch = "x86"))]
+#[allow(non_camel_case_types)]
+#[repr(C)]
+pub struct user {
+    pub regs: user_regs_struct,
+    pub u_fpvalid: libc::c_long,
+    pub i387: user_fpregs_struct,
+    pub u_tsize: libc::c_ulong,
+    pub u_dsize: libc::c_ulong,
+    pub u_ssize: libc::c_ulong,
+    pub start_code: libc::c_ulong,
+    pub start_stack: libc::c_ulong,
+    pub signal: libc::c_long,
+    __reserved: libc::c_int,
+    pub u_ar0: *mut user_regs_struct,
+    pub u_fpstate: *mut user_fpregs_struct,
+    pub magic: libc::c_ulong,
+    pub u_comm: [libc::c_char; 32],
+    pub u_debugreg: [libc::c_int; 8],
+}
+
 const NUM_DEBUG_REGISTERS: usize = 8;
 
 pub struct ThreadInfoX86 {
     pub stack_pointer: usize,
     pub tgid: Pid, // thread group id
     pub ppid: Pid, // parent process
-    pub regs: libc::user_regs_struct,
-    pub fpregs: libc::user_fpregs_struct,
+    pub regs: user_regs_struct,
+    pub fpregs: user_fpregs_struct,
     #[cfg(target_arch = "x86_64")]
     pub dregs: [libc::c_ulonglong; NUM_DEBUG_REGISTERS],
     #[cfg(target_arch = "x86")]
     pub dregs: [libc::c_int; NUM_DEBUG_REGISTERS],
     #[cfg(target_arch = "x86")]
-    pub fpxregs: libc::user_fpxregs_struct,
+    pub fpxregs: user_fpxregs_struct,
 }
 
 impl CommonThreadInfo for ThreadInfoX86 {}
 
 impl ThreadInfoX86 {
     // nix currently doesn't support PTRACE_GETREGSET, so we have to do it ourselves
-    fn getregset(pid: Pid) -> Result<libc::user_regs_struct> {
+    fn getregset(pid: Pid) -> Result<user_regs_struct> {
         Self::ptrace_get_data_via_io(
             0x4204 as ptrace::RequestType, // PTRACE_GETREGSET
             Some(NT_Elf::NT_PRSTATUS),
             nix::unistd::Pid::from_raw(pid),
         )
     }
 
-    pub fn getregs(pid: Pid) -> Result<libc::user_regs_struct> {
+    pub fn getregs(pid: Pid) -> Result<user_regs_struct> {
         // TODO: nix restricts PTRACE_GETREGS to arm android for some reason
         Self::ptrace_get_data(
             12 as ptrace::RequestType, // PTRACE_GETREGS
@@ -45,7 +128,7 @@ impl ThreadInfoX86 {
     }
 
     // nix currently doesn't support PTRACE_GETREGSET, so we have to do it ourselves
-    fn getfpregset(pid: Pid) -> Result<libc::user_fpregs_struct> {
+    fn getfpregset(pid: Pid) -> Result<user_fpregs_struct> {
         Self::ptrace_get_data_via_io(
             0x4204 as ptrace::RequestType, // PTRACE_GETREGSET
             Some(NT_Elf::NT_PRFPREGSET),
@@ -54,7 +137,7 @@ impl ThreadInfoX86 {
     }
 
     // nix currently doesn't support PTRACE_GETFPREGS, so we have to do it ourselves
-    fn getfpregs(pid: Pid) -> Result<libc::user_fpregs_struct> {
+    fn getfpregs(pid: Pid) -> Result<user_fpregs_struct> {
         Self::ptrace_get_data(
             14 as ptrace::RequestType, // PTRACE_GETFPREGS
             None,
@@ -64,9 +147,9 @@ impl ThreadInfoX86 {
 
     // nix currently doesn't support PTRACE_GETFPXREGS, so we have to do it ourselves
     #[cfg(target_arch = "x86")]
-    fn getfpxregs(pid: Pid) -> Result<libc::user_fpxregs_struct> {
+    fn getfpxregs(pid: Pid) -> Result<user_fpxregs_struct> {
         Self::ptrace_get_data(
-            ptrace::Request::PTRACE_GETFPXREGS as ptrace::RequestType,
+            18 as ptrace::RequestType, // PTRACE_GETFPXREGS
             None,
             nix::unistd::Pid::from_raw(pid),
         )
@@ -86,7 +169,7 @@ impl ThreadInfoX86 {
         let regs = Self::getregset(tid).or_else(|_| Self::getregs(tid))?;
         let fpregs = Self::getfpregset(tid).or_else(|_| Self::getfpregs(tid))?;
         #[cfg(target_arch = "x86")]
-        let fpxregs: libc::user_fpxregs_struct;
+        let fpxregs: user_fpxregs_struct;
         #[cfg(target_arch = "x86")]
         {
             if cfg!(target_feature = "fxsr") {