forked from M-Labs/nac3
1
0
Fork 0

Libunwind: build libunwind with rust bindings

This commit is contained in:
pca006132 2020-06-30 17:19:09 +08:00
parent 9282dcffdb
commit 6be44c3483
13 changed files with 1464 additions and 1 deletions

28
src/Cargo.lock generated
View File

@ -35,6 +35,12 @@ version = "1.3.4"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "08c48aae112d48ed9f069b33538ea9e3e90aa263cfa3d1c24309612b1f7472de"
[[package]]
name = "cc"
version = "1.0.54"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "7bbb73db36c1246e9034e307d0fba23f9a2e251faa47ade70c1bd252220c8311"
[[package]]
name = "cfg-if"
version = "0.1.10"
@ -209,10 +215,18 @@ dependencies = [
"volatile-register",
]
[[package]]
name = "libc"
version = "0.1.0"
dependencies = [
"cc",
"libboard_zynq",
]
[[package]]
name = "libcortex_a9"
version = "0.0.0"
source = "git+https://git.m-labs.hk/M-Labs/zc706.git#ec252b099cf67a51ba9daa72b3292db8c21ba1b8"
source = "git+https://git.m-labs.hk/M-Labs/zc706.git#6195ad40c334a847cd01cd4adadf6b8f8d730908"
dependencies = [
"bit_field",
"libregister",
@ -369,11 +383,13 @@ dependencies = [
"futures",
"libasync",
"libboard_zynq",
"libc",
"libcortex_a9",
"libsupport_zynq",
"log",
"num-derive",
"num-traits",
"unwind",
"void",
]
@ -416,6 +432,16 @@ version = "0.2.1"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "f7fe0bb3479651439c9112f72b6c505038574c9fbb575ed1bf3b797fa39dd564"
[[package]]
name = "unwind"
version = "0.0.0"
dependencies = [
"cc",
"cfg-if",
"compiler_builtins",
"libc",
]
[[package]]
name = "vcell"
version = "0.1.2"

View File

@ -1,7 +1,9 @@
[workspace]
members = [
"libc",
"libdyld",
"libcoreio",
"libunwind",
"runtime",
"szl"
]

View File

@ -34,6 +34,7 @@
#define __need_NULL
#include <sys/cdefs.h>
#include <stddef.h>
#include <printf.h>
/* typedef only __gnuc_va_list, used throughout the header */
#define __need___va_list

14
src/libc/Cargo.toml Normal file
View File

@ -0,0 +1,14 @@
[package]
name = "libc"
version = "0.1.0"
authors = ["pca006132 <john.lck40@gmail.com>"]
edition = "2018"
build = "build.rs"
# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
[dependencies]
libboard_zynq = { git = "https://git.m-labs.hk/M-Labs/zc706.git" }
[build-dependencies]
cc = { version = "1.0.1" }

40
src/libc/build.rs Normal file
View File

@ -0,0 +1,40 @@
fn main() {
println!("cargo:rerun-if-changed=build.rs");
libc::compile();
}
mod libc {
use std::path::Path;
pub fn compile() {
let cfg = &mut cc::Build::new();
cfg.cpp(false);
cfg.warnings(false);
// still have problem compiling the libunwind
cfg.flag("-nostdlib");
cfg.flag("-ffreestanding");
cfg.flag("-fno-PIC");
cfg.flag("-isystem../include");
cfg.flag("-fno-stack-protector");
cfg.flag("--target=armv7-none-eabihf");
cfg.flag("-std=c99");
cfg.flag("-fstrict-aliasing");
cfg.flag("-funwind-tables");
cfg.flag("-fvisibility=hidden");
cfg.flag("-U_FORTIFY_SOURCE");
cfg.define("_FORTIFY_SOURCE", Some("0"));
let unwind_sources = vec![
"printf.c"
];
let root = Path::new("../libc");
for src in unwind_sources {
println!("cargo:rerun-if-changed={}", src);
cfg.file(root.join("src").join(src));
}
cfg.compile("printf");
}
}

15
src/libc/src/lib.rs Normal file
View File

@ -0,0 +1,15 @@
// Helper crate for dealing with c ffi
#![allow(non_camel_case_types)]
#![no_std]
use libboard_zynq::stdio;
pub type c_int = i32;
pub type uintptr_t = usize;
pub type c_void = core::ffi::c_void;
#[no_mangle]
extern "C" fn _putchar(byte: u8) {
let mut uart = stdio::get_uart();
uart.write_byte(byte);
}

913
src/libc/src/printf.c Normal file
View File

@ -0,0 +1,913 @@
///////////////////////////////////////////////////////////////////////////////
// \author (c) Marco Paland (info@paland.com)
// 2014-2019, PALANDesign Hannover, Germany
//
// \license The MIT License (MIT)
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
//
// \brief Tiny printf, sprintf and (v)snprintf implementation, optimized for speed on
// embedded systems with a very limited resources. These routines are thread
// safe and reentrant!
// Use this instead of the bloated standard/newlib printf cause these use
// malloc for printf (and may not be thread safe).
//
///////////////////////////////////////////////////////////////////////////////
#include <stdbool.h>
#include <stdint.h>
#include <stdio.h>
// define this globally (e.g. gcc -DPRINTF_INCLUDE_CONFIG_H ...) to include the
// printf_config.h header file
// default: undefined
#ifdef PRINTF_INCLUDE_CONFIG_H
#include "printf_config.h"
#endif
// 'ntoa' conversion buffer size, this must be big enough to hold one converted
// numeric number including padded zeros (dynamically created on stack)
// default: 32 byte
#ifndef PRINTF_NTOA_BUFFER_SIZE
#define PRINTF_NTOA_BUFFER_SIZE 32U
#endif
// 'ftoa' conversion buffer size, this must be big enough to hold one converted
// float number including padded zeros (dynamically created on stack)
// default: 32 byte
#ifndef PRINTF_FTOA_BUFFER_SIZE
#define PRINTF_FTOA_BUFFER_SIZE 32U
#endif
// support for the floating point type (%f)
// default: activated
#ifndef PRINTF_DISABLE_SUPPORT_FLOAT
#define PRINTF_SUPPORT_FLOAT
#endif
// support for exponential floating point notation (%e/%g)
// default: activated
#ifndef PRINTF_DISABLE_SUPPORT_EXPONENTIAL
#define PRINTF_SUPPORT_EXPONENTIAL
#endif
// define the default floating point precision
// default: 6 digits
#ifndef PRINTF_DEFAULT_FLOAT_PRECISION
#define PRINTF_DEFAULT_FLOAT_PRECISION 6U
#endif
// define the largest float suitable to print with %f
// default: 1e9
#ifndef PRINTF_MAX_FLOAT
#define PRINTF_MAX_FLOAT 1e9
#endif
// support for the long long types (%llu or %p)
// default: activated
#ifndef PRINTF_DISABLE_SUPPORT_LONG_LONG
#define PRINTF_SUPPORT_LONG_LONG
#endif
// support for the ptrdiff_t type (%t)
// ptrdiff_t is normally defined in <stddef.h> as long or long long type
// default: activated
#ifndef PRINTF_DISABLE_SUPPORT_PTRDIFF_T
#define PRINTF_SUPPORT_PTRDIFF_T
#endif
///////////////////////////////////////////////////////////////////////////////
// internal flag definitions
#define FLAGS_ZEROPAD (1U << 0U)
#define FLAGS_LEFT (1U << 1U)
#define FLAGS_PLUS (1U << 2U)
#define FLAGS_SPACE (1U << 3U)
#define FLAGS_HASH (1U << 4U)
#define FLAGS_UPPERCASE (1U << 5U)
#define FLAGS_CHAR (1U << 6U)
#define FLAGS_SHORT (1U << 7U)
#define FLAGS_LONG (1U << 8U)
#define FLAGS_LONG_LONG (1U << 9U)
#define FLAGS_PRECISION (1U << 10U)
#define FLAGS_ADAPT_EXP (1U << 11U)
// import float.h for DBL_MAX
#if defined(PRINTF_SUPPORT_FLOAT)
#include <float.h>
#endif
// output function type
typedef void (*out_fct_type)(char character, void* buffer, size_t idx, size_t maxlen);
// wrapper (used as buffer) for output function type
typedef struct {
void (*fct)(char character, void* arg);
void* arg;
} out_fct_wrap_type;
// internal buffer output
static inline void _out_buffer(char character, void* buffer, size_t idx, size_t maxlen)
{
if (idx < maxlen) {
((char*)buffer)[idx] = character;
}
}
// internal null output
static inline void _out_null(char character, void* buffer, size_t idx, size_t maxlen)
{
(void)character; (void)buffer; (void)idx; (void)maxlen;
}
// internal _putchar wrapper
static inline void _out_char(char character, void* buffer, size_t idx, size_t maxlen)
{
(void)buffer; (void)idx; (void)maxlen;
if (character) {
_putchar(character);
}
}
// internal output function wrapper
static inline void _out_fct(char character, void* buffer, size_t idx, size_t maxlen)
{
(void)idx; (void)maxlen;
if (character) {
// buffer is the output fct pointer
((out_fct_wrap_type*)buffer)->fct(character, ((out_fct_wrap_type*)buffer)->arg);
}
}
// internal secure strlen
// \return The length of the string (excluding the terminating 0) limited by 'maxsize'
static inline unsigned int _strnlen_s(const char* str, size_t maxsize)
{
const char* s;
for (s = str; *s && maxsize--; ++s);
return (unsigned int)(s - str);
}
// internal test if char is a digit (0-9)
// \return true if char is a digit
static inline bool _is_digit(char ch)
{
return (ch >= '0') && (ch <= '9');
}
// internal ASCII string to unsigned int conversion
static unsigned int _atoi(const char** str)
{
unsigned int i = 0U;
while (_is_digit(**str)) {
i = i * 10U + (unsigned int)(*((*str)++) - '0');
}
return i;
}
// output the specified string in reverse, taking care of any zero-padding
static size_t _out_rev(out_fct_type out, char* buffer, size_t idx, size_t maxlen, const char* buf, size_t len, unsigned int width, unsigned int flags)
{
const size_t start_idx = idx;
// pad spaces up to given width
if (!(flags & FLAGS_LEFT) && !(flags & FLAGS_ZEROPAD)) {
for (size_t i = len; i < width; i++) {
out(' ', buffer, idx++, maxlen);
}
}
// reverse string
while (len) {
out(buf[--len], buffer, idx++, maxlen);
}
// append pad spaces up to given width
if (flags & FLAGS_LEFT) {
while (idx - start_idx < width) {
out(' ', buffer, idx++, maxlen);
}
}
return idx;
}
// internal itoa format
static size_t _ntoa_format(out_fct_type out, char* buffer, size_t idx, size_t maxlen, char* buf, size_t len, bool negative, unsigned int base, unsigned int prec, unsigned int width, unsigned int flags)
{
// pad leading zeros
if (!(flags & FLAGS_LEFT)) {
if (width && (flags & FLAGS_ZEROPAD) && (negative || (flags & (FLAGS_PLUS | FLAGS_SPACE)))) {
width--;
}
while ((len < prec) && (len < PRINTF_NTOA_BUFFER_SIZE)) {
buf[len++] = '0';
}
while ((flags & FLAGS_ZEROPAD) && (len < width) && (len < PRINTF_NTOA_BUFFER_SIZE)) {
buf[len++] = '0';
}
}
// handle hash
if (flags & FLAGS_HASH) {
if (!(flags & FLAGS_PRECISION) && len && ((len == prec) || (len == width))) {
len--;
if (len && (base == 16U)) {
len--;
}
}
if ((base == 16U) && !(flags & FLAGS_UPPERCASE) && (len < PRINTF_NTOA_BUFFER_SIZE)) {
buf[len++] = 'x';
}
else if ((base == 16U) && (flags & FLAGS_UPPERCASE) && (len < PRINTF_NTOA_BUFFER_SIZE)) {
buf[len++] = 'X';
}
else if ((base == 2U) && (len < PRINTF_NTOA_BUFFER_SIZE)) {
buf[len++] = 'b';
}
if (len < PRINTF_NTOA_BUFFER_SIZE) {
buf[len++] = '0';
}
}
if (len < PRINTF_NTOA_BUFFER_SIZE) {
if (negative) {
buf[len++] = '-';
}
else if (flags & FLAGS_PLUS) {
buf[len++] = '+'; // ignore the space if the '+' exists
}
else if (flags & FLAGS_SPACE) {
buf[len++] = ' ';
}
}
return _out_rev(out, buffer, idx, maxlen, buf, len, width, flags);
}
// internal itoa for 'long' type
static size_t _ntoa_long(out_fct_type out, char* buffer, size_t idx, size_t maxlen, unsigned long value, bool negative, unsigned long base, unsigned int prec, unsigned int width, unsigned int flags)
{
char buf[PRINTF_NTOA_BUFFER_SIZE];
size_t len = 0U;
// no hash for 0 values
if (!value) {
flags &= ~FLAGS_HASH;
}
// write if precision != 0 and value is != 0
if (!(flags & FLAGS_PRECISION) || value) {
do {
const char digit = (char)(value % base);
buf[len++] = digit < 10 ? '0' + digit : (flags & FLAGS_UPPERCASE ? 'A' : 'a') + digit - 10;
value /= base;
} while (value && (len < PRINTF_NTOA_BUFFER_SIZE));
}
return _ntoa_format(out, buffer, idx, maxlen, buf, len, negative, (unsigned int)base, prec, width, flags);
}
// internal itoa for 'long long' type
#if defined(PRINTF_SUPPORT_LONG_LONG)
static size_t _ntoa_long_long(out_fct_type out, char* buffer, size_t idx, size_t maxlen, unsigned long long value, bool negative, unsigned long long base, unsigned int prec, unsigned int width, unsigned int flags)
{
char buf[PRINTF_NTOA_BUFFER_SIZE];
size_t len = 0U;
// no hash for 0 values
if (!value) {
flags &= ~FLAGS_HASH;
}
// write if precision != 0 and value is != 0
if (!(flags & FLAGS_PRECISION) || value) {
do {
const char digit = (char)(value % base);
buf[len++] = digit < 10 ? '0' + digit : (flags & FLAGS_UPPERCASE ? 'A' : 'a') + digit - 10;
value /= base;
} while (value && (len < PRINTF_NTOA_BUFFER_SIZE));
}
return _ntoa_format(out, buffer, idx, maxlen, buf, len, negative, (unsigned int)base, prec, width, flags);
}
#endif // PRINTF_SUPPORT_LONG_LONG
#if defined(PRINTF_SUPPORT_FLOAT)
#if defined(PRINTF_SUPPORT_EXPONENTIAL)
// forward declaration so that _ftoa can switch to exp notation for values > PRINTF_MAX_FLOAT
static size_t _etoa(out_fct_type out, char* buffer, size_t idx, size_t maxlen, double value, unsigned int prec, unsigned int width, unsigned int flags);
#endif
// internal ftoa for fixed decimal floating point
static size_t _ftoa(out_fct_type out, char* buffer, size_t idx, size_t maxlen, double value, unsigned int prec, unsigned int width, unsigned int flags)
{
char buf[PRINTF_FTOA_BUFFER_SIZE];
size_t len = 0U;
double diff = 0.0;
// powers of 10
static const double pow10[] = { 1, 10, 100, 1000, 10000, 100000, 1000000, 10000000, 100000000, 1000000000 };
// test for special values
if (value != value)
return _out_rev(out, buffer, idx, maxlen, "nan", 3, width, flags);
if (value < -DBL_MAX)
return _out_rev(out, buffer, idx, maxlen, "fni-", 4, width, flags);
if (value > DBL_MAX)
return _out_rev(out, buffer, idx, maxlen, (flags & FLAGS_PLUS) ? "fni+" : "fni", (flags & FLAGS_PLUS) ? 4U : 3U, width, flags);
// test for very large values
// standard printf behavior is to print EVERY whole number digit -- which could be 100s of characters overflowing your buffers == bad
if ((value > PRINTF_MAX_FLOAT) || (value < -PRINTF_MAX_FLOAT)) {
#if defined(PRINTF_SUPPORT_EXPONENTIAL)
return _etoa(out, buffer, idx, maxlen, value, prec, width, flags);
#else
return 0U;
#endif
}
// test for negative
bool negative = false;
if (value < 0) {
negative = true;
value = 0 - value;
}
// set default precision, if not set explicitly
if (!(flags & FLAGS_PRECISION)) {
prec = PRINTF_DEFAULT_FLOAT_PRECISION;
}
// limit precision to 9, cause a prec >= 10 can lead to overflow errors
while ((len < PRINTF_FTOA_BUFFER_SIZE) && (prec > 9U)) {
buf[len++] = '0';
prec--;
}
int whole = (int)value;
double tmp = (value - whole) * pow10[prec];
unsigned long frac = (unsigned long)tmp;
diff = tmp - frac;
if (diff > 0.5) {
++frac;
// handle rollover, e.g. case 0.99 with prec 1 is 1.0
if (frac >= pow10[prec]) {
frac = 0;
++whole;
}
}
else if (diff < 0.5) {
}
else if ((frac == 0U) || (frac & 1U)) {
// if halfway, round up if odd OR if last digit is 0
++frac;
}
if (prec == 0U) {
diff = value - (double)whole;
if ((!(diff < 0.5) || (diff > 0.5)) && (whole & 1)) {
// exactly 0.5 and ODD, then round up
// 1.5 -> 2, but 2.5 -> 2
++whole;
}
}
else {
unsigned int count = prec;
// now do fractional part, as an unsigned number
while (len < PRINTF_FTOA_BUFFER_SIZE) {
--count;
buf[len++] = (char)(48U + (frac % 10U));
if (!(frac /= 10U)) {
break;
}
}
// add extra 0s
while ((len < PRINTF_FTOA_BUFFER_SIZE) && (count-- > 0U)) {
buf[len++] = '0';
}
if (len < PRINTF_FTOA_BUFFER_SIZE) {
// add decimal
buf[len++] = '.';
}
}
// do whole part, number is reversed
while (len < PRINTF_FTOA_BUFFER_SIZE) {
buf[len++] = (char)(48 + (whole % 10));
if (!(whole /= 10)) {
break;
}
}
// pad leading zeros
if (!(flags & FLAGS_LEFT) && (flags & FLAGS_ZEROPAD)) {
if (width && (negative || (flags & (FLAGS_PLUS | FLAGS_SPACE)))) {
width--;
}
while ((len < width) && (len < PRINTF_FTOA_BUFFER_SIZE)) {
buf[len++] = '0';
}
}
if (len < PRINTF_FTOA_BUFFER_SIZE) {
if (negative) {
buf[len++] = '-';
}
else if (flags & FLAGS_PLUS) {
buf[len++] = '+'; // ignore the space if the '+' exists
}
else if (flags & FLAGS_SPACE) {
buf[len++] = ' ';
}
}
return _out_rev(out, buffer, idx, maxlen, buf, len, width, flags);
}
#if defined(PRINTF_SUPPORT_EXPONENTIAL)
// internal ftoa variant for exponential floating-point type, contributed by Martijn Jasperse <m.jasperse@gmail.com>
static size_t _etoa(out_fct_type out, char* buffer, size_t idx, size_t maxlen, double value, unsigned int prec, unsigned int width, unsigned int flags)
{
// check for NaN and special values
if ((value != value) || (value > DBL_MAX) || (value < -DBL_MAX)) {
return _ftoa(out, buffer, idx, maxlen, value, prec, width, flags);
}
// determine the sign
const bool negative = value < 0;
if (negative) {
value = -value;
}
// default precision
if (!(flags & FLAGS_PRECISION)) {
prec = PRINTF_DEFAULT_FLOAT_PRECISION;
}
// determine the decimal exponent
// based on the algorithm by David Gay (https://www.ampl.com/netlib/fp/dtoa.c)
union {
uint64_t U;
double F;
} conv;
conv.F = value;
int exp2 = (int)((conv.U >> 52U) & 0x07FFU) - 1023; // effectively log2
conv.U = (conv.U & ((1ULL << 52U) - 1U)) | (1023ULL << 52U); // drop the exponent so conv.F is now in [1,2)
// now approximate log10 from the log2 integer part and an expansion of ln around 1.5
int expval = (int)(0.1760912590558 + exp2 * 0.301029995663981 + (conv.F - 1.5) * 0.289529654602168);
// now we want to compute 10^expval but we want to be sure it won't overflow
exp2 = (int)(expval * 3.321928094887362 + 0.5);
const double z = expval * 2.302585092994046 - exp2 * 0.6931471805599453;
const double z2 = z * z;
conv.U = (uint64_t)(exp2 + 1023) << 52U;
// compute exp(z) using continued fractions, see https://en.wikipedia.org/wiki/Exponential_function#Continued_fractions_for_ex
conv.F *= 1 + 2 * z / (2 - z + (z2 / (6 + (z2 / (10 + z2 / 14)))));
// correct for rounding errors
if (value < conv.F) {
expval--;
conv.F /= 10;
}
// the exponent format is "%+03d" and largest value is "307", so set aside 4-5 characters
unsigned int minwidth = ((expval < 100) && (expval > -100)) ? 4U : 5U;
// in "%g" mode, "prec" is the number of *significant figures* not decimals
if (flags & FLAGS_ADAPT_EXP) {
// do we want to fall-back to "%f" mode?
if ((value >= 1e-4) && (value < 1e6)) {
if ((int)prec > expval) {
prec = (unsigned)((int)prec - expval - 1);
}
else {
prec = 0;
}
flags |= FLAGS_PRECISION; // make sure _ftoa respects precision
// no characters in exponent
minwidth = 0U;
expval = 0;
}
else {
// we use one sigfig for the whole part
if ((prec > 0) && (flags & FLAGS_PRECISION)) {
--prec;
}
}
}
// will everything fit?
unsigned int fwidth = width;
if (width > minwidth) {
// we didn't fall-back so subtract the characters required for the exponent
fwidth -= minwidth;
} else {
// not enough characters, so go back to default sizing
fwidth = 0U;
}
if ((flags & FLAGS_LEFT) && minwidth) {
// if we're padding on the right, DON'T pad the floating part
fwidth = 0U;
}
// rescale the float value
if (expval) {
value /= conv.F;
}
// output the floating part
const size_t start_idx = idx;
idx = _ftoa(out, buffer, idx, maxlen, negative ? -value : value, prec, fwidth, flags & ~FLAGS_ADAPT_EXP);
// output the exponent part
if (minwidth) {
// output the exponential symbol
out((flags & FLAGS_UPPERCASE) ? 'E' : 'e', buffer, idx++, maxlen);
// output the exponent value
idx = _ntoa_long(out, buffer, idx, maxlen, (expval < 0) ? -expval : expval, expval < 0, 10, 0, minwidth-1, FLAGS_ZEROPAD | FLAGS_PLUS);
// might need to right-pad spaces
if (flags & FLAGS_LEFT) {
while (idx - start_idx < width) out(' ', buffer, idx++, maxlen);
}
}
return idx;
}
#endif // PRINTF_SUPPORT_EXPONENTIAL
#endif // PRINTF_SUPPORT_FLOAT
// internal vsnprintf
static int _vsnprintf(out_fct_type out, char* buffer, const size_t maxlen, const char* format, va_list va)
{
unsigned int flags, width, precision, n;
size_t idx = 0U;
if (!buffer) {
// use null output function
out = _out_null;
}
while (*format)
{
// format specifier? %[flags][width][.precision][length]
if (*format != '%') {
// no
out(*format, buffer, idx++, maxlen);
format++;
continue;
}
else {
// yes, evaluate it
format++;
}
// evaluate flags
flags = 0U;
do {
switch (*format) {
case '0': flags |= FLAGS_ZEROPAD; format++; n = 1U; break;
case '-': flags |= FLAGS_LEFT; format++; n = 1U; break;
case '+': flags |= FLAGS_PLUS; format++; n = 1U; break;
case ' ': flags |= FLAGS_SPACE; format++; n = 1U; break;
case '#': flags |= FLAGS_HASH; format++; n = 1U; break;
default : n = 0U; break;
}
} while (n);
// evaluate width field
width = 0U;
if (_is_digit(*format)) {
width = _atoi(&format);
}
else if (*format == '*') {
const int w = va_arg(va, int);
if (w < 0) {
flags |= FLAGS_LEFT; // reverse padding
width = (unsigned int)-w;
}
else {
width = (unsigned int)w;
}
format++;
}
// evaluate precision field
precision = 0U;
if (*format == '.') {
flags |= FLAGS_PRECISION;
format++;
if (_is_digit(*format)) {
precision = _atoi(&format);
}
else if (*format == '*') {
const int prec = (int)va_arg(va, int);
precision = prec > 0 ? (unsigned int)prec : 0U;
format++;
}
}
// evaluate length field
switch (*format) {
case 'l' :
flags |= FLAGS_LONG;
format++;
if (*format == 'l') {
flags |= FLAGS_LONG_LONG;
format++;
}
break;
case 'h' :
flags |= FLAGS_SHORT;
format++;
if (*format == 'h') {
flags |= FLAGS_CHAR;
format++;
}
break;
#if defined(PRINTF_SUPPORT_PTRDIFF_T)
case 't' :
flags |= (sizeof(ptrdiff_t) == sizeof(long) ? FLAGS_LONG : FLAGS_LONG_LONG);
format++;
break;
#endif
case 'j' :
flags |= (sizeof(intmax_t) == sizeof(long) ? FLAGS_LONG : FLAGS_LONG_LONG);
format++;
break;
case 'z' :
flags |= (sizeof(size_t) == sizeof(long) ? FLAGS_LONG : FLAGS_LONG_LONG);
format++;
break;
default :
break;
}
// evaluate specifier
switch (*format) {
case 'd' :
case 'i' :
case 'u' :
case 'x' :
case 'X' :
case 'o' :
case 'b' : {
// set the base
unsigned int base;
if (*format == 'x' || *format == 'X') {
base = 16U;
}
else if (*format == 'o') {
base = 8U;
}
else if (*format == 'b') {
base = 2U;
}
else {
base = 10U;
flags &= ~FLAGS_HASH; // no hash for dec format
}
// uppercase
if (*format == 'X') {
flags |= FLAGS_UPPERCASE;
}
// no plus or space flag for u, x, X, o, b
if ((*format != 'i') && (*format != 'd')) {
flags &= ~(FLAGS_PLUS | FLAGS_SPACE);
}
// ignore '0' flag when precision is given
if (flags & FLAGS_PRECISION) {
flags &= ~FLAGS_ZEROPAD;
}
// convert the integer
if ((*format == 'i') || (*format == 'd')) {
// signed
if (flags & FLAGS_LONG_LONG) {
#if defined(PRINTF_SUPPORT_LONG_LONG)
const long long value = va_arg(va, long long);
idx = _ntoa_long_long(out, buffer, idx, maxlen, (unsigned long long)(value > 0 ? value : 0 - value), value < 0, base, precision, width, flags);
#endif
}
else if (flags & FLAGS_LONG) {
const long value = va_arg(va, long);
idx = _ntoa_long(out, buffer, idx, maxlen, (unsigned long)(value > 0 ? value : 0 - value), value < 0, base, precision, width, flags);
}
else {
const int value = (flags & FLAGS_CHAR) ? (char)va_arg(va, int) : (flags & FLAGS_SHORT) ? (short int)va_arg(va, int) : va_arg(va, int);
idx = _ntoa_long(out, buffer, idx, maxlen, (unsigned int)(value > 0 ? value : 0 - value), value < 0, base, precision, width, flags);
}
}
else {
// unsigned
if (flags & FLAGS_LONG_LONG) {
#if defined(PRINTF_SUPPORT_LONG_LONG)
idx = _ntoa_long_long(out, buffer, idx, maxlen, va_arg(va, unsigned long long), false, base, precision, width, flags);
#endif
}
else if (flags & FLAGS_LONG) {
idx = _ntoa_long(out, buffer, idx, maxlen, va_arg(va, unsigned long), false, base, precision, width, flags);
}
else {
const unsigned int value = (flags & FLAGS_CHAR) ? (unsigned char)va_arg(va, unsigned int) : (flags & FLAGS_SHORT) ? (unsigned short int)va_arg(va, unsigned int) : va_arg(va, unsigned int);
idx = _ntoa_long(out, buffer, idx, maxlen, value, false, base, precision, width, flags);
}
}
format++;
break;
}
#if defined(PRINTF_SUPPORT_FLOAT)
case 'f' :
case 'F' :
if (*format == 'F') flags |= FLAGS_UPPERCASE;
idx = _ftoa(out, buffer, idx, maxlen, va_arg(va, double), precision, width, flags);
format++;
break;
#if defined(PRINTF_SUPPORT_EXPONENTIAL)
case 'e':
case 'E':
case 'g':
case 'G':
if ((*format == 'g')||(*format == 'G')) flags |= FLAGS_ADAPT_EXP;
if ((*format == 'E')||(*format == 'G')) flags |= FLAGS_UPPERCASE;
idx = _etoa(out, buffer, idx, maxlen, va_arg(va, double), precision, width, flags);
format++;
break;
#endif // PRINTF_SUPPORT_EXPONENTIAL
#endif // PRINTF_SUPPORT_FLOAT
case 'c' : {
unsigned int l = 1U;
// pre padding
if (!(flags & FLAGS_LEFT)) {
while (l++ < width) {
out(' ', buffer, idx++, maxlen);
}
}
// char output
out((char)va_arg(va, int), buffer, idx++, maxlen);
// post padding
if (flags & FLAGS_LEFT) {
while (l++ < width) {
out(' ', buffer, idx++, maxlen);
}
}
format++;
break;
}
case 's' : {
const char* p = va_arg(va, char*);
unsigned int l = _strnlen_s(p, precision ? precision : (size_t)-1);
// pre padding
if (flags & FLAGS_PRECISION) {
l = (l < precision ? l : precision);
}
if (!(flags & FLAGS_LEFT)) {
while (l++ < width) {
out(' ', buffer, idx++, maxlen);
}
}
// string output
while ((*p != 0) && (!(flags & FLAGS_PRECISION) || precision--)) {
out(*(p++), buffer, idx++, maxlen);
}
// post padding
if (flags & FLAGS_LEFT) {
while (l++ < width) {
out(' ', buffer, idx++, maxlen);
}
}
format++;
break;
}
case 'p' : {
width = sizeof(void*) * 2U;
flags |= FLAGS_ZEROPAD | FLAGS_UPPERCASE;
#if defined(PRINTF_SUPPORT_LONG_LONG)
const bool is_ll = sizeof(uintptr_t) == sizeof(long long);
if (is_ll) {
idx = _ntoa_long_long(out, buffer, idx, maxlen, (uintptr_t)va_arg(va, void*), false, 16U, precision, width, flags);
}
else {
#endif
idx = _ntoa_long(out, buffer, idx, maxlen, (unsigned long)((uintptr_t)va_arg(va, void*)), false, 16U, precision, width, flags);
#if defined(PRINTF_SUPPORT_LONG_LONG)
}
#endif
format++;
break;
}
case '%' :
out('%', buffer, idx++, maxlen);
format++;
break;
default :
out(*format, buffer, idx++, maxlen);
format++;
break;
}
}
// termination
out((char)0, buffer, idx < maxlen ? idx : maxlen - 1U, maxlen);
// return written chars without terminating \0
return (int)idx;
}
///////////////////////////////////////////////////////////////////////////////
int printf_(const char* format, ...)
{
va_list va;
va_start(va, format);
char buffer[1];
const int ret = _vsnprintf(_out_char, buffer, (size_t)-1, format, va);
va_end(va);
_putchar('\n');
return ret;
}
int sprintf_(char* buffer, const char* format, ...)
{
va_list va;
va_start(va, format);
const int ret = _vsnprintf(_out_buffer, buffer, (size_t)-1, format, va);
va_end(va);
return ret;
}
int snprintf_(char* buffer, size_t count, const char* format, ...)
{
va_list va;
va_start(va, format);
const int ret = _vsnprintf(_out_buffer, buffer, count, format, va);
va_end(va);
return ret;
}
int vprintf_(const char* format, va_list va)
{
char buffer[1];
return _vsnprintf(_out_char, buffer, (size_t)-1, format, va);
}
int vsnprintf_(char* buffer, size_t count, const char* format, va_list va)
{
return _vsnprintf(_out_buffer, buffer, count, format, va);
}
int fctprintf(void (*out)(char character, void* arg), void* arg, const char* format, ...)
{
va_list va;
va_start(va, format);
const out_fct_wrap_type out_fct_wrap = { out, arg };
const int ret = _vsnprintf(_out_fct, (char*)(uintptr_t)&out_fct_wrap, (size_t)-1, format, va);
va_end(va);
return ret;
}

27
src/libunwind/Cargo.toml Normal file
View File

@ -0,0 +1,27 @@
[package]
authors = ["The Rust Project Developers"]
name = "unwind"
version = "0.0.0"
build = "build.rs"
edition = "2018"
include = [
'/libunwind/*',
]
[lib]
name = "unwind"
path = "lib.rs"
test = false
bench = false
doc = false
[dependencies]
compiler_builtins = "0.1.0"
cfg-if = "0.1.8"
libc = { path = "../libc" }
[build-dependencies]
cc = { version = "1.0.1" }
[features]
llvm-libunwind = []

View File

@ -0,0 +1,41 @@
use libc::{c_void, c_int};
use crate::libunwind as uw;
const UW_REG_SP: c_int = 13;
pub fn backtrace<F>(f: F) -> Result<(), uw::_Unwind_Reason_Code>
where F: FnMut(usize) -> ()
{
struct TraceContext<F> {
step_fn: F,
prev_sp: uw::_Unwind_Word
}
extern fn trace<F>(context: *mut uw::_Unwind_Context, arg: *mut c_void)
-> uw::_Unwind_Reason_Code
where F: FnMut(usize) -> ()
{
unsafe {
let trace_context = &mut *(arg as *mut TraceContext<F>);
// Detect the root of a libfringe thread
let cur_sp = uw::_Unwind_GetGR(context, UW_REG_SP);
if cur_sp == trace_context.prev_sp {
return uw::_URC_END_OF_STACK
} else {
trace_context.prev_sp = cur_sp;
}
(trace_context.step_fn)(uw::_Unwind_GetIP(context));
uw::_URC_NO_REASON
}
}
unsafe {
let mut trace_context = TraceContext { step_fn: f, prev_sp: 0 };
match uw::_Unwind_Backtrace(trace::<F>, &mut trace_context as *mut _ as *mut c_void) {
uw::_URC_NO_REASON => Ok(()),
err => Err(err)
}
}
}

64
src/libunwind/build.rs Normal file
View File

@ -0,0 +1,64 @@
fn main() {
println!("cargo:rerun-if-changed=build.rs");
llvm_libunwind::compile();
}
mod llvm_libunwind {
use std::path::Path;
/// Compile the libunwind C/C++ source code.
pub fn compile() {
let cfg = &mut cc::Build::new();
cfg.cpp(true);
cfg.cpp_set_stdlib(None);
cfg.warnings(false);
// libunwind expects a __LITTLE_ENDIAN__ macro to be set for LE archs, cf. #65765
cfg.define("__LITTLE_ENDIAN__", Some("1"));
// still have problem compiling the libunwind
cfg.flag("-nostdlib");
cfg.flag("-ffreestanding");
cfg.flag("-fno-PIC");
cfg.flag("-Isrc");
cfg.flag("-isystem../include");
cfg.flag("-fno-stack-protector");
cfg.flag("--target=armv7-none-eabihf");
cfg.define("_LIBUNWIND_IS_BAREMETAL", Some("1"));
cfg.define("_LIBUNWIND_NO_HEAP", Some("1"));
cfg.define("_LIBUNWIND_HAS_NO_THREADS", Some("1"));
cfg.define("NDEBUG", Some("1"));
cfg.flag("-std=c99");
cfg.flag("-std=c++11");
cfg.flag("-nostdinc++");
cfg.flag("-fno-exceptions");
cfg.flag("-fno-rtti");
cfg.flag("-fstrict-aliasing");
cfg.flag("-funwind-tables");
cfg.flag("-fvisibility=hidden");
cfg.flag_if_supported("-fvisibility-global-new-delete-hidden");
cfg.define("_LIBUNWIND_DISABLE_VISIBILITY_ANNOTATIONS", None);
cfg.flag("-U_FORTIFY_SOURCE");
cfg.define("_FORTIFY_SOURCE", Some("0"));
let unwind_sources = vec![
"Unwind-EHABI.cpp",
"Unwind-seh.cpp",
"Unwind-sjlj.c",
"UnwindLevel1-gcc-ext.c",
"UnwindLevel1.c",
"UnwindRegistersRestore.S",
"UnwindRegistersSave.S",
"libunwind.cpp"
];
let root = Path::new("../llvm_libunwind");
cfg.include(root.join("include"));
for src in unwind_sources {
println!("cargo:rerun-if-changed={}", src);
cfg.file(root.join("src").join(src));
}
cfg.compile("unwind");
}
}

33
src/libunwind/lib.rs Normal file
View File

@ -0,0 +1,33 @@
#![no_std]
#![feature(link_cfg)]
#![feature(nll)]
#![feature(unwind_attributes)]
#![feature(static_nobundle)]
#![cfg_attr(not(target_env = "msvc"), feature(libc))]
cfg_if::cfg_if! {
if #[cfg(target_env = "msvc")] {
// no extra unwinder support needed
} else if #[cfg(all(target_arch = "wasm32", not(target_os = "emscripten")))] {
// no unwinder on the system!
} else {
mod libunwind;
pub use libunwind::*;
mod backtrace;
pub use backtrace::backtrace;
}
}
#[cfg(target_env = "musl")]
#[link(name = "unwind", kind = "static", cfg(target_feature = "crt-static"))]
#[link(name = "gcc_s", cfg(not(target_feature = "crt-static")))]
extern "C" {}
#[cfg(target_os = "redox")]
#[link(name = "gcc_eh", kind = "static-nobundle", cfg(target_feature = "crt-static"))]
#[link(name = "gcc_s", cfg(not(target_feature = "crt-static")))]
extern "C" {}
#[cfg(all(target_vendor = "fortanix", target_env = "sgx"))]
#[link(name = "unwind", kind = "static-nobundle")]
extern "C" {}

285
src/libunwind/libunwind.rs Normal file
View File

@ -0,0 +1,285 @@
#![allow(nonstandard_style)]
use libc::{c_int, c_void, uintptr_t};
#[repr(C)]
#[derive(Debug, Copy, Clone, PartialEq)]
pub enum _Unwind_Reason_Code {
_URC_NO_REASON = 0,
_URC_FOREIGN_EXCEPTION_CAUGHT = 1,
_URC_FATAL_PHASE2_ERROR = 2,
_URC_FATAL_PHASE1_ERROR = 3,
_URC_NORMAL_STOP = 4,
_URC_END_OF_STACK = 5,
_URC_HANDLER_FOUND = 6,
_URC_INSTALL_CONTEXT = 7,
_URC_CONTINUE_UNWIND = 8,
_URC_FAILURE = 9, // used only by ARM EHABI
}
pub use _Unwind_Reason_Code::*;
pub type _Unwind_Exception_Class = u64;
pub type _Unwind_Word = uintptr_t;
pub type _Unwind_Ptr = uintptr_t;
pub type _Unwind_Trace_Fn =
extern "C" fn(ctx: *mut _Unwind_Context, arg: *mut c_void) -> _Unwind_Reason_Code;
#[cfg(target_arch = "x86")]
pub const unwinder_private_data_size: usize = 5;
#[cfg(target_arch = "x86_64")]
pub const unwinder_private_data_size: usize = 6;
#[cfg(all(target_arch = "arm", not(target_os = "ios")))]
pub const unwinder_private_data_size: usize = 20;
#[cfg(all(target_arch = "arm", target_os = "ios"))]
pub const unwinder_private_data_size: usize = 5;
#[cfg(target_arch = "aarch64")]
pub const unwinder_private_data_size: usize = 2;
#[cfg(target_arch = "mips")]
pub const unwinder_private_data_size: usize = 2;
#[cfg(target_arch = "mips64")]
pub const unwinder_private_data_size: usize = 2;
#[cfg(any(target_arch = "powerpc", target_arch = "powerpc64"))]
pub const unwinder_private_data_size: usize = 2;
#[cfg(target_arch = "s390x")]
pub const unwinder_private_data_size: usize = 2;
#[cfg(target_arch = "sparc64")]
pub const unwinder_private_data_size: usize = 2;
#[cfg(target_arch = "riscv64")]
pub const unwinder_private_data_size: usize = 2;
#[cfg(target_os = "emscripten")]
pub const unwinder_private_data_size: usize = 20;
#[cfg(all(target_arch = "hexagon", target_os = "linux"))]
pub const unwinder_private_data_size: usize = 35;
#[repr(C)]
pub struct _Unwind_Exception {
pub exception_class: _Unwind_Exception_Class,
pub exception_cleanup: _Unwind_Exception_Cleanup_Fn,
pub private: [_Unwind_Word; unwinder_private_data_size],
}
pub enum _Unwind_Context {}
pub type _Unwind_Exception_Cleanup_Fn =
extern "C" fn(unwind_code: _Unwind_Reason_Code, exception: *mut _Unwind_Exception);
#[cfg_attr(
all(feature = "llvm-libunwind", any(target_os = "fuchsia", target_os = "linux")),
link(name = "unwind", kind = "static")
)]
extern "C" {
#[unwind(allowed)]
pub fn _Unwind_Resume(exception: *mut _Unwind_Exception) -> !;
pub fn _Unwind_DeleteException(exception: *mut _Unwind_Exception);
pub fn _Unwind_GetLanguageSpecificData(ctx: *mut _Unwind_Context) -> *mut c_void;
pub fn _Unwind_GetRegionStart(ctx: *mut _Unwind_Context) -> _Unwind_Ptr;
pub fn _Unwind_GetTextRelBase(ctx: *mut _Unwind_Context) -> _Unwind_Ptr;
pub fn _Unwind_GetDataRelBase(ctx: *mut _Unwind_Context) -> _Unwind_Ptr;
}
cfg_if::cfg_if! {
if #[cfg(all(any(target_os = "ios", target_os = "netbsd", not(target_arch = "arm"))))] {
// Not ARM EHABI
#[repr(C)]
#[derive(Copy, Clone, PartialEq)]
pub enum _Unwind_Action {
_UA_SEARCH_PHASE = 1,
_UA_CLEANUP_PHASE = 2,
_UA_HANDLER_FRAME = 4,
_UA_FORCE_UNWIND = 8,
_UA_END_OF_STACK = 16,
}
pub use _Unwind_Action::*;
#[cfg_attr(all(feature = "llvm-libunwind",
any(target_os = "fuchsia", target_os = "linux")),
link(name = "unwind", kind = "static"))]
extern "C" {
pub fn _Unwind_GetGR(ctx: *mut _Unwind_Context, reg_index: c_int) -> _Unwind_Word;
pub fn _Unwind_SetGR(ctx: *mut _Unwind_Context, reg_index: c_int, value: _Unwind_Word);
pub fn _Unwind_GetIP(ctx: *mut _Unwind_Context) -> _Unwind_Word;
pub fn _Unwind_SetIP(ctx: *mut _Unwind_Context, value: _Unwind_Word);
pub fn _Unwind_GetIPInfo(ctx: *mut _Unwind_Context, ip_before_insn: *mut c_int)
-> _Unwind_Word;
pub fn _Unwind_FindEnclosingFunction(pc: *mut c_void) -> *mut c_void;
}
} else {
// ARM EHABI
#[repr(C)]
#[derive(Copy, Clone, PartialEq)]
pub enum _Unwind_State {
_US_VIRTUAL_UNWIND_FRAME = 0,
_US_UNWIND_FRAME_STARTING = 1,
_US_UNWIND_FRAME_RESUME = 2,
_US_ACTION_MASK = 3,
_US_FORCE_UNWIND = 8,
_US_END_OF_STACK = 16,
}
pub use _Unwind_State::*;
#[repr(C)]
enum _Unwind_VRS_Result {
_UVRSR_OK = 0,
_UVRSR_NOT_IMPLEMENTED = 1,
_UVRSR_FAILED = 2,
}
#[repr(C)]
enum _Unwind_VRS_RegClass {
_UVRSC_CORE = 0,
_UVRSC_VFP = 1,
_UVRSC_FPA = 2,
_UVRSC_WMMXD = 3,
_UVRSC_WMMXC = 4,
}
use _Unwind_VRS_RegClass::*;
#[repr(C)]
enum _Unwind_VRS_DataRepresentation {
_UVRSD_UINT32 = 0,
_UVRSD_VFPX = 1,
_UVRSD_FPAX = 2,
_UVRSD_UINT64 = 3,
_UVRSD_FLOAT = 4,
_UVRSD_DOUBLE = 5,
}
use _Unwind_VRS_DataRepresentation::*;
pub const UNWIND_POINTER_REG: c_int = 12;
pub const UNWIND_SP_REG: c_int = 13;
pub const UNWIND_IP_REG: c_int = 15;
#[cfg_attr(all(feature = "llvm-libunwind",
any(target_os = "fuchsia", target_os = "linux")),
link(name = "unwind", kind = "static"))]
extern "C" {
fn _Unwind_VRS_Get(ctx: *mut _Unwind_Context,
regclass: _Unwind_VRS_RegClass,
regno: _Unwind_Word,
repr: _Unwind_VRS_DataRepresentation,
data: *mut c_void)
-> _Unwind_VRS_Result;
fn _Unwind_VRS_Set(ctx: *mut _Unwind_Context,
regclass: _Unwind_VRS_RegClass,
regno: _Unwind_Word,
repr: _Unwind_VRS_DataRepresentation,
data: *mut c_void)
-> _Unwind_VRS_Result;
}
// On Android or ARM/Linux, these are implemented as macros:
pub unsafe fn _Unwind_GetGR(ctx: *mut _Unwind_Context, reg_index: c_int) -> _Unwind_Word {
let mut val: _Unwind_Word = 0;
_Unwind_VRS_Get(ctx, _UVRSC_CORE, reg_index as _Unwind_Word, _UVRSD_UINT32,
&mut val as *mut _ as *mut c_void);
val
}
pub unsafe fn _Unwind_SetGR(ctx: *mut _Unwind_Context, reg_index: c_int, value: _Unwind_Word) {
let mut value = value;
_Unwind_VRS_Set(ctx, _UVRSC_CORE, reg_index as _Unwind_Word, _UVRSD_UINT32,
&mut value as *mut _ as *mut c_void);
}
pub unsafe fn _Unwind_GetIP(ctx: *mut _Unwind_Context)
-> _Unwind_Word {
let val = _Unwind_GetGR(ctx, UNWIND_IP_REG);
(val & !1) as _Unwind_Word
}
pub unsafe fn _Unwind_SetIP(ctx: *mut _Unwind_Context,
value: _Unwind_Word) {
// Propagate thumb bit to instruction pointer
let thumb_state = _Unwind_GetGR(ctx, UNWIND_IP_REG) & 1;
let value = value | thumb_state;
_Unwind_SetGR(ctx, UNWIND_IP_REG, value);
}
pub unsafe fn _Unwind_GetIPInfo(ctx: *mut _Unwind_Context,
ip_before_insn: *mut c_int)
-> _Unwind_Word {
*ip_before_insn = 0;
_Unwind_GetIP(ctx)
}
// This function also doesn't exist on Android or ARM/Linux, so make it a no-op
pub unsafe fn _Unwind_FindEnclosingFunction(pc: *mut c_void) -> *mut c_void {
pc
}
}
} // cfg_if!
cfg_if::cfg_if! {
if #[cfg(not(all(target_os = "ios", target_arch = "arm")))] {
// Not 32-bit iOS
#[cfg_attr(all(feature = "llvm-libunwind",
any(target_os = "fuchsia", target_os = "linux")),
link(name = "unwind", kind = "static"))]
extern "C" {
#[unwind(allowed)]
pub fn _Unwind_RaiseException(exception: *mut _Unwind_Exception) -> _Unwind_Reason_Code;
pub fn _Unwind_Backtrace(trace: _Unwind_Trace_Fn,
trace_argument: *mut c_void)
-> _Unwind_Reason_Code;
}
} else {
// 32-bit iOS uses SjLj and does not provide _Unwind_Backtrace()
#[cfg_attr(all(feature = "llvm-libunwind",
any(target_os = "fuchsia", target_os = "linux")),
link(name = "unwind", kind = "static"))]
extern "C" {
#[unwind(allowed)]
pub fn _Unwind_SjLj_RaiseException(e: *mut _Unwind_Exception) -> _Unwind_Reason_Code;
}
#[inline]
pub unsafe fn _Unwind_RaiseException(exc: *mut _Unwind_Exception) -> _Unwind_Reason_Code {
_Unwind_SjLj_RaiseException(exc)
}
}
} // cfg_if!
cfg_if::cfg_if! {
if #[cfg(all(windows, target_arch = "x86_64", target_env = "gnu"))] {
// We declare these as opaque types. This is fine since you just need to
// pass them to _GCC_specific_handler and forget about them.
pub enum EXCEPTION_RECORD {}
pub type LPVOID = *mut c_void;
pub enum CONTEXT {}
pub enum DISPATCHER_CONTEXT {}
pub type EXCEPTION_DISPOSITION = c_int;
type PersonalityFn = unsafe extern "C" fn(version: c_int,
actions: _Unwind_Action,
exception_class: _Unwind_Exception_Class,
exception_object: *mut _Unwind_Exception,
context: *mut _Unwind_Context)
-> _Unwind_Reason_Code;
extern "C" {
pub fn _GCC_specific_handler(exceptionRecord: *mut EXCEPTION_RECORD,
establisherFrame: LPVOID,
contextRecord: *mut CONTEXT,
dispatcherContext: *mut DISPATCHER_CONTEXT,
personality: PersonalityFn)
-> EXCEPTION_DISPOSITION;
}
}
} // cfg_if!
#[no_mangle]
extern fn abort() {
panic!("Abort!");
}

View File

@ -24,4 +24,6 @@ libsupport_zynq = { git = "https://git.m-labs.hk/M-Labs/zc706.git" }
libcortex_a9 = { git = "https://git.m-labs.hk/M-Labs/zc706.git" }
libasync = { git = "https://git.m-labs.hk/M-Labs/zc706.git" }
dyld = { path = "../libdyld" }
unwind = { path = "../libunwind" }
libc = { path = "../libc" }
fatfs = { version = "0.3", features = ["core_io"], default-features = false }