Auto merge of #2440 - name1e5s:chore/android-elf, r=JohnTitor

add PT_* ELF segment type const definitions for android

Author: bors

libc-test/semver/android.txt

@@ -1677,6 +1677,21 @@ PTRACE_SETSIGINFO
 PTRACE_SINGLESTEP
 PTRACE_SYSCALL
 PTRACE_TRACEME
+PT_HIOS
+PT_LOPROC
+PT_HIPROC
+PT_DYNAMIC
+PT_GNU_EH_FRAME
+PT_GNU_RELRO
+PT_GNU_STACK
+PT_INTERP
+PT_LOAD
+PT_LOOS
+PT_NOTE
+PT_NULL
+PT_PHDR
+PT_SHLIB
+PT_TLS
 P_ALL
 P_PGID
 P_PID

src/unix/linux_like/android/mod.rs

@@ -1867,6 +1867,25 @@ pub const MFD_CLOEXEC: ::c_uint = 0x0001;
 pub const MFD_ALLOW_SEALING: ::c_uint = 0x0002;
 pub const MFD_HUGETLB: ::c_uint = 0x0004;
 
+// these are used in the p_type field of Elf32_Phdr and Elf64_Phdr, which has
+// the type Elf32Word and Elf64Word respectively. Luckily, both of those are u32
+// so we can use that type here to avoid having to cast.
+pub const PT_NULL: u32 = 0;
+pub const PT_LOAD: u32 = 1;
+pub const PT_DYNAMIC: u32 = 2;
+pub const PT_INTERP: u32 = 3;
+pub const PT_NOTE: u32 = 4;
+pub const PT_SHLIB: u32 = 5;
+pub const PT_PHDR: u32 = 6;
+pub const PT_TLS: u32 = 7;
+pub const PT_LOOS: u32 = 0x60000000;
+pub const PT_GNU_EH_FRAME: u32 = 0x6474e550;
+pub const PT_GNU_STACK: u32 = 0x6474e551;
+pub const PT_GNU_RELRO: u32 = 0x6474e552;
+pub const PT_HIOS: u32 = 0x6fffffff;
+pub const PT_LOPROC: u32 = 0x70000000;
+pub const PT_HIPROC: u32 = 0x7fffffff;
+
 // linux/netfilter.h
 pub const NF_DROP: ::c_int = 0;
 pub const NF_ACCEPT: ::c_int = 1;