From 698f8c2f01ea549d77d7dc3338a12e04c11057b9 Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@progress-linux.org>
Date: Wed, 17 Apr 2024 14:02:58 +0200
Subject: Adding upstream version 1.64.0+dfsg1.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
---
 .../backtrace/src/symbolize/gimli/libs_illumos.rs  | 99 ++++++++++++++++++++++
 1 file changed, 99 insertions(+)
 create mode 100644 library/backtrace/src/symbolize/gimli/libs_illumos.rs

(limited to 'library/backtrace/src/symbolize/gimli/libs_illumos.rs')

diff --git a/library/backtrace/src/symbolize/gimli/libs_illumos.rs b/library/backtrace/src/symbolize/gimli/libs_illumos.rs
new file mode 100644
index 000000000..e64975e0c
--- /dev/null
+++ b/library/backtrace/src/symbolize/gimli/libs_illumos.rs
@@ -0,0 +1,99 @@
+use super::mystd::borrow::ToOwned;
+use super::mystd::ffi::{CStr, OsStr};
+use super::mystd::os::unix::prelude::*;
+use super::{Library, LibrarySegment, Vec};
+use core::mem;
+use object::NativeEndian;
+
+#[cfg(target_pointer_width = "64")]
+use object::elf::{FileHeader64 as FileHeader, ProgramHeader64 as ProgramHeader};
+
+type EHdr = FileHeader<NativeEndian>;
+type PHdr = ProgramHeader<NativeEndian>;
+
+#[repr(C)]
+struct LinkMap {
+    l_addr: libc::c_ulong,
+    l_name: *const libc::c_char,
+    l_ld: *const libc::c_void,
+    l_next: *const LinkMap,
+    l_prev: *const LinkMap,
+    l_refname: *const libc::c_char,
+}
+
+const RTLD_SELF: *const libc::c_void = -3isize as *const libc::c_void;
+const RTLD_DI_LINKMAP: libc::c_int = 2;
+
+extern "C" {
+    fn dlinfo(
+        handle: *const libc::c_void,
+        request: libc::c_int,
+        p: *mut libc::c_void,
+    ) -> libc::c_int;
+}
+
+pub(super) fn native_libraries() -> Vec<Library> {
+    let mut libs = Vec::new();
+
+    // Request the current link map from the runtime linker:
+    let map = unsafe {
+        let mut map: *const LinkMap = mem::zeroed();
+        if dlinfo(
+            RTLD_SELF,
+            RTLD_DI_LINKMAP,
+            (&mut map) as *mut *const LinkMap as *mut libc::c_void,
+        ) != 0
+        {
+            return libs;
+        }
+        map
+    };
+
+    // Each entry in the link map represents a loaded object:
+    let mut l = map;
+    while !l.is_null() {
+        // Fetch the fully qualified path of the loaded object:
+        let bytes = unsafe { CStr::from_ptr((*l).l_name) }.to_bytes();
+        let name = OsStr::from_bytes(bytes).to_owned();
+
+        // The base address of the object loaded into memory:
+        let addr = unsafe { (*l).l_addr };
+
+        // Use the ELF header for this object to locate the program
+        // header:
+        let e: *const EHdr = unsafe { (*l).l_addr as *const EHdr };
+        let phoff = unsafe { (*e).e_phoff }.get(NativeEndian);
+        let phnum = unsafe { (*e).e_phnum }.get(NativeEndian);
+        let etype = unsafe { (*e).e_type }.get(NativeEndian);
+
+        let phdr: *const PHdr = (addr + phoff) as *const PHdr;
+        let phdr = unsafe { core::slice::from_raw_parts(phdr, phnum as usize) };
+
+        libs.push(Library {
+            name,
+            segments: phdr
+                .iter()
+                .map(|p| {
+                    let memsz = p.p_memsz.get(NativeEndian);
+                    let vaddr = p.p_vaddr.get(NativeEndian);
+                    LibrarySegment {
+                        len: memsz as usize,
+                        stated_virtual_memory_address: vaddr as usize,
+                    }
+                })
+                .collect(),
+            bias: if etype == object::elf::ET_EXEC {
+                // Program header addresses for the base executable are
+                // already absolute.
+                0
+            } else {
+                // Other addresses are relative to the object base.
+                addr as usize
+            },
+        });
+
+        l = unsafe { (*l).l_next };
+    }
+
+    libs
+}
-- 
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