diff options
| -rw-r--r-- | ROMFS/Makefile | 3 | ||||
| -rw-r--r-- | ROMFS/mixers/FMU_Q.mix | 52 | ||||
| -rw-r--r-- | ROMFS/mixers/FMU_X5.mix (renamed from ROMFS/mixers/FMU_delta.mix) | 0 | ||||
| -rw-r--r-- | apps/drivers/blinkm/blinkm.cpp | 46 | ||||
| -rw-r--r-- | apps/drivers/px4io/uploader.cpp | 159 | ||||
| -rw-r--r-- | apps/drivers/px4io/uploader.h | 11 | ||||
| -rw-r--r-- | apps/hott_telemetry/hott_telemetry_main.c | 1 | ||||
| -rw-r--r-- | apps/mavlink/mavlink_receiver.c | 10 | ||||
| -rw-r--r-- | nuttx/binfmt/libelf/Kconfig | 40 | ||||
| -rw-r--r-- | nuttx/binfmt/libelf/gnu-elf.ld | 129 | ||||
| -rw-r--r-- | nuttx/binfmt/libelf/libelf_ctors.c | 215 | ||||
| -rw-r--r-- | nuttx/binfmt/libelf/libelf_dtors.c | 215 | ||||
| -rw-r--r-- | nuttx/binfmt/libelf/libelf_init.c | 202 | ||||
| -rw-r--r-- | nuttx/binfmt/libelf/libelf_iobuffer.c | 136 | ||||
| -rw-r--r-- | nuttx/binfmt/libelf/libelf_sections.c | 284 | ||||
| -rw-r--r-- | nuttx/binfmt/libelf/libelf_symbols.c | 329 | ||||
| -rw-r--r-- | nuttx/binfmt/libelf/libelf_uninit.c | 126 | ||||
| -rw-r--r-- | nuttx/binfmt/libelf/libelf_verify.c | 120 |
18 files changed, 2001 insertions, 77 deletions
diff --git a/ROMFS/Makefile b/ROMFS/Makefile index 3b024de06..d827fa491 100644 --- a/ROMFS/Makefile +++ b/ROMFS/Makefile @@ -23,7 +23,8 @@ ROMFS_FSSPEC := $(SRCROOT)/scripts/rcS~init.d/rcS \ $(SRCROOT)/scripts/rc.PX4IOAR~init.d/rc.PX4IOAR \ $(SRCROOT)/scripts/rc.FMU_quad_x~init.d/rc.FMU_quad_x \ $(SRCROOT)/mixers/FMU_pass.mix~mixers/FMU_pass.mix \ - $(SRCROOT)/mixers/FMU_delta.mix~mixers/FMU_delta.mix \ + $(SRCROOT)/mixers/FMU_Q.mix~mixers/FMU_Q.mix \ + $(SRCROOT)/mixers/FMU_X5.mix~mixers/FMU_X5.mix \ $(SRCROOT)/mixers/FMU_AERT.mix~mixers/FMU_AERT.mix \ $(SRCROOT)/mixers/FMU_AET.mix~mixers/FMU_AET.mix \ $(SRCROOT)/mixers/FMU_RET.mix~mixers/FMU_ERT.mix \ diff --git a/ROMFS/mixers/FMU_Q.mix b/ROMFS/mixers/FMU_Q.mix new file mode 100644 index 000000000..a35d299fd --- /dev/null +++ b/ROMFS/mixers/FMU_Q.mix @@ -0,0 +1,52 @@ +Delta-wing mixer for PX4FMU +=========================== + +Designed for Bormatec Camflyer Q + +This file defines mixers suitable for controlling a delta wing aircraft using +PX4FMU. The configuration assumes the elevon servos are connected to PX4FMU +servo outputs 0 and 1 and the motor speed control to output 3. Output 2 is +assumed to be unused. + +Inputs to the mixer come from channel group 0 (vehicle attitude), channels 0 +(roll), 1 (pitch) and 3 (thrust). + +See the README for more information on the scaler format. + +Elevon mixers +------------- +Three scalers total (output, roll, pitch). + +On the assumption that the two elevon servos are physically reversed, the pitch +input is inverted between the two servos. + +The scaling factor for roll inputs is adjusted to implement differential travel +for the elevons. + +M: 2 +O: 10000 10000 0 -10000 10000 +S: 0 0 -5000 -8000 0 -10000 10000 +S: 0 1 -8000 -8000 0 -10000 10000 + +M: 2 +O: 10000 10000 0 -10000 10000 +S: 0 0 -8000 -5000 0 -10000 10000 +S: 0 1 8000 8000 0 -10000 10000 + +Output 2 +-------- +This mixer is empty. + +Z: + +Motor speed mixer +----------------- +Two scalers total (output, thrust). + +This mixer generates a full-range output (-1 to 1) from an input in the (0 - 1) +range. Inputs below zero are treated as zero. + +M: 1 +O: 10000 10000 0 -10000 10000 +S: 0 3 0 20000 -10000 -10000 10000 + diff --git a/ROMFS/mixers/FMU_delta.mix b/ROMFS/mixers/FMU_X5.mix index 981466704..981466704 100644 --- a/ROMFS/mixers/FMU_delta.mix +++ b/ROMFS/mixers/FMU_X5.mix diff --git a/apps/drivers/blinkm/blinkm.cpp b/apps/drivers/blinkm/blinkm.cpp index bc5c74de1..fc929284c 100644 --- a/apps/drivers/blinkm/blinkm.cpp +++ b/apps/drivers/blinkm/blinkm.cpp @@ -126,7 +126,7 @@ static const int LED_NOBLINK = 0; class BlinkM : public device::I2C { public: - BlinkM(int bus); + BlinkM(int bus, int blinkm); ~BlinkM(); @@ -245,8 +245,8 @@ const char *BlinkM::script_names[] = { extern "C" __EXPORT int blinkm_main(int argc, char *argv[]); -BlinkM::BlinkM(int bus) : - I2C("blinkm", BLINKM_DEVICE_PATH, bus, 0x09, 100000), +BlinkM::BlinkM(int bus, int blinkm) : + I2C("blinkm", BLINKM_DEVICE_PATH, bus, blinkm, 100000), led_color_1(LED_OFF), led_color_2(LED_OFF), led_color_3(LED_OFF), @@ -830,14 +830,42 @@ BlinkM::get_firmware_version(uint8_t version[2]) return transfer(&msg, sizeof(msg), version, sizeof(version)); } +void blinkm_usage() { + fprintf(stderr, "missing command: try 'start', 'systemstate', 'ledoff', 'list' or a script name {options}\n"); + fprintf(stderr, "options:\n"); + fprintf(stderr, "\t-b --bus i2cbus (3)\n"); + fprintf(stderr, "\t-a --blinkmaddr blinkmaddr (9)\n"); +} + int blinkm_main(int argc, char *argv[]) { + + int i2cdevice = 3; + int blinkmadr = 9; + + int x; + + for (x = 1; x < argc; x++) { + if (strcmp(argv[x], "-b") == 0 || strcmp(argv[x], "--bus") == 0) { + if (argc > x + 1) { + i2cdevice = atoi(argv[x + 1]); + } + } + + if (strcmp(argv[x], "-a") == 0 || strcmp(argv[x], "--blinkmaddr") == 0) { + if (argc > x + 1) { + blinkmadr = atoi(argv[x + 1]); + } + } + + } + if (!strcmp(argv[1], "start")) { if (g_blinkm != nullptr) errx(1, "already started"); - g_blinkm = new BlinkM(3); + g_blinkm = new BlinkM(i2cdevice, blinkmadr); if (g_blinkm == nullptr) errx(1, "new failed"); @@ -852,8 +880,11 @@ blinkm_main(int argc, char *argv[]) } - if (g_blinkm == nullptr) - errx(1, "not started"); + if (g_blinkm == nullptr) { + fprintf(stderr, "not started\n"); + blinkm_usage(); + exit(0); + } if (!strcmp(argv[1], "systemstate")) { g_blinkm->setMode(1); @@ -882,5 +913,6 @@ blinkm_main(int argc, char *argv[]) if (ioctl(fd, BLINKM_PLAY_SCRIPT_NAMED, (unsigned long)argv[1]) == OK) exit(0); - errx(1, "missing command, try 'start', 'systemstate', 'ledoff', 'list' or a script name."); + blinkm_usage(); + exit(0); } diff --git a/apps/drivers/px4io/uploader.cpp b/apps/drivers/px4io/uploader.cpp index 2de33f410..abf59216a 100644 --- a/apps/drivers/px4io/uploader.cpp +++ b/apps/drivers/px4io/uploader.cpp @@ -48,6 +48,7 @@ #include <unistd.h> #include <fcntl.h> #include <poll.h> +#include <sys/stat.h> #include "uploader.h" @@ -109,6 +110,8 @@ int PX4IO_Uploader::upload(const char *filenames[]) { int ret; + const char *filename = NULL; + size_t fw_size; _io_fd = open("/dev/ttyS2", O_RDWR); @@ -135,9 +138,22 @@ PX4IO_Uploader::upload(const char *filenames[]) } log("using firmware from %s", filenames[i]); + filename = filenames[i]; break; } + if (filename == NULL) { + log("no firmware found"); + return -ENOENT; + } + + struct stat st; + if (stat(filename, &st) != 0) { + log("Failed to stat %s - %d\n", filename, (int)errno); + return -errno; + } + fw_size = st.st_size; + if (_fw_fd == -1) return -ENOENT; @@ -172,7 +188,7 @@ PX4IO_Uploader::upload(const char *filenames[]) continue; } - ret = program(); + ret = program(fw_size); if (ret != OK) { log("program failed"); @@ -180,9 +196,9 @@ PX4IO_Uploader::upload(const char *filenames[]) } if (bl_rev <= 2) - ret = verify_rev2(); + ret = verify_rev2(fw_size); else if(bl_rev == 3) { - ret = verify_rev3(); + ret = verify_rev3(fw_size); } if (ret != OK) { @@ -219,7 +235,7 @@ PX4IO_Uploader::recv(uint8_t &c, unsigned timeout) int ret = ::poll(&fds[0], 1, timeout); if (ret < 1) { - //log("poll timeout %d", ret); + log("poll timeout %d", ret); return -ETIMEDOUT; } @@ -232,7 +248,7 @@ int PX4IO_Uploader::recv(uint8_t *p, unsigned count) { while (count--) { - int ret = recv(*p++); + int ret = recv(*p++, 5000); if (ret != OK) return ret; @@ -248,7 +264,7 @@ PX4IO_Uploader::drain() int ret; do { - ret = recv(c, 250); + ret = recv(c, 1000); if (ret == OK) { //log("discard 0x%02x", c); @@ -343,24 +359,55 @@ PX4IO_Uploader::erase() return get_sync(10000); /* allow 10s timeout */ } + +static int read_with_retry(int fd, void *buf, size_t n) +{ + int ret; + uint8_t retries = 0; + do { + ret = read(fd, buf, n); + } while (ret == -1 && retries++ < 100); + if (retries != 0) { + printf("read of %u bytes needed %u retries\n", + (unsigned)n, + (unsigned)retries); + } + return ret; +} + int -PX4IO_Uploader::program() +PX4IO_Uploader::program(size_t fw_size) { uint8_t file_buf[PROG_MULTI_MAX]; ssize_t count; int ret; + size_t sent = 0; - log("program..."); - lseek(_fw_fd, 0, SEEK_SET); + log("programming %u bytes...", (unsigned)fw_size); + + ret = lseek(_fw_fd, 0, SEEK_SET); - while (true) { + while (sent < fw_size) { /* get more bytes to program */ - //log(" %d", (int)lseek(_fw_fd, 0, SEEK_CUR)); - count = read(_fw_fd, file_buf, sizeof(file_buf)); + size_t n = fw_size - sent; + if (n > sizeof(file_buf)) { + n = sizeof(file_buf); + } + count = read_with_retry(_fw_fd, file_buf, n); + + if (count != (ssize_t)n) { + log("firmware read of %u bytes at %u failed -> %d errno %d", + (unsigned)n, + (unsigned)sent, + (int)count, + (int)errno); + } if (count == 0) return OK; + sent += count; + if (count < 0) return -errno; @@ -376,14 +423,16 @@ PX4IO_Uploader::program() if (ret != OK) return ret; } + return OK; } int -PX4IO_Uploader::verify_rev2() +PX4IO_Uploader::verify_rev2(size_t fw_size) { - uint8_t file_buf[PROG_MULTI_MAX]; + uint8_t file_buf[4]; ssize_t count; int ret; + size_t sent = 0; log("verify..."); lseek(_fw_fd, 0, SEEK_SET); @@ -395,14 +444,27 @@ PX4IO_Uploader::verify_rev2() if (ret != OK) return ret; - while (true) { + while (sent < fw_size) { /* get more bytes to verify */ - int base = (int)lseek(_fw_fd, 0, SEEK_CUR); - count = read(_fw_fd, file_buf, sizeof(file_buf)); + size_t n = fw_size - sent; + if (n > sizeof(file_buf)) { + n = sizeof(file_buf); + } + count = read_with_retry(_fw_fd, file_buf, n); + + if (count != (ssize_t)n) { + log("firmware read of %u bytes at %u failed -> %d errno %d", + (unsigned)n, + (unsigned)sent, + (int)count, + (int)errno); + } if (count == 0) break; + sent += count; + if (count < 0) return -errno; @@ -415,15 +477,15 @@ PX4IO_Uploader::verify_rev2() for (ssize_t i = 0; i < count; i++) { uint8_t c; - ret = recv(c); + ret = recv(c, 5000); if (ret != OK) { - log("%d: got %d waiting for bytes", base + i, ret); + log("%d: got %d waiting for bytes", sent + i, ret); return ret; } if (c != file_buf[i]) { - log("%d: got 0x%02x expected 0x%02x", base + i, c, file_buf[i]); + log("%d: got 0x%02x expected 0x%02x", sent + i, c, file_buf[i]); return -EINVAL; } } @@ -440,21 +502,21 @@ PX4IO_Uploader::verify_rev2() } int -PX4IO_Uploader::verify_rev3() +PX4IO_Uploader::verify_rev3(size_t fw_size_local) { int ret; uint8_t file_buf[4]; ssize_t count; uint32_t sum = 0; uint32_t bytes_read = 0; - uint32_t fw_size = 0; uint32_t crc = 0; + uint32_t fw_size_remote; uint8_t fill_blank = 0xff; log("verify..."); lseek(_fw_fd, 0, SEEK_SET); - ret = get_info(INFO_FLASH_SIZE, fw_size); + ret = get_info(INFO_FLASH_SIZE, fw_size_remote); send(PROTO_EOC); if (ret != OK) { @@ -463,9 +525,20 @@ PX4IO_Uploader::verify_rev3() } /* read through the firmware file again and calculate the checksum*/ - while (true) { - lseek(_fw_fd, 0, SEEK_CUR); - count = read(_fw_fd, file_buf, sizeof(file_buf)); + while (bytes_read < fw_size_local) { + size_t n = fw_size_local - bytes_read; + if (n > sizeof(file_buf)) { + n = sizeof(file_buf); + } + count = read_with_retry(_fw_fd, file_buf, n); + + if (count != (ssize_t)n) { + log("firmware read of %u bytes at %u failed -> %d errno %d", + (unsigned)n, + (unsigned)bytes_read, + (int)count, + (int)errno); + } /* set the rest to ff */ if (count == 0) { @@ -482,7 +555,7 @@ PX4IO_Uploader::verify_rev3() } /* fill the rest with 0xff */ - while (bytes_read < fw_size) { + while (bytes_read < fw_size_remote) { sum = crc32(&fill_blank, sizeof(fill_blank), sum); bytes_read += sizeof(fill_blank); } @@ -516,36 +589,6 @@ PX4IO_Uploader::reboot() return OK; } -int -PX4IO_Uploader::compare(bool &identical) -{ - uint32_t file_vectors[15]; - uint32_t fw_vectors[15]; - int ret; - - lseek(_fw_fd, 0, SEEK_SET); - ret = read(_fw_fd, &file_vectors[0], sizeof(file_vectors)); - - send(PROTO_CHIP_VERIFY); - send(PROTO_EOC); - ret = get_sync(); - - if (ret != OK) - return ret; - - send(PROTO_READ_MULTI); - send(sizeof(fw_vectors)); - send(PROTO_EOC); - ret = recv((uint8_t *)&fw_vectors[0], sizeof(fw_vectors)); - - if (ret != OK) - return ret; - - identical = (memcmp(&file_vectors[0], &fw_vectors[0], sizeof(file_vectors))) ? true : false; - - return OK; -} - void PX4IO_Uploader::log(const char *fmt, ...) { @@ -557,4 +600,4 @@ PX4IO_Uploader::log(const char *fmt, ...) va_end(ap); printf("\n"); fflush(stdout); -}
\ No newline at end of file +} diff --git a/apps/drivers/px4io/uploader.h b/apps/drivers/px4io/uploader.h index b8a3a2794..915ee9259 100644 --- a/apps/drivers/px4io/uploader.h +++ b/apps/drivers/px4io/uploader.h @@ -85,7 +85,7 @@ private: void log(const char *fmt, ...); - int recv(uint8_t &c, unsigned timeout = 1000); + int recv(uint8_t &c, unsigned timeout); int recv(uint8_t *p, unsigned count); void drain(); int send(uint8_t c); @@ -94,11 +94,10 @@ private: int sync(); int get_info(int param, uint32_t &val); int erase(); - int program(); - int verify_rev2(); - int verify_rev3(); + int program(size_t fw_size); + int verify_rev2(size_t fw_size); + int verify_rev3(size_t fw_size); int reboot(); - int compare(bool &identical); }; -#endif
\ No newline at end of file +#endif diff --git a/apps/hott_telemetry/hott_telemetry_main.c b/apps/hott_telemetry/hott_telemetry_main.c index d67ab06a9..31c9247aa 100644 --- a/apps/hott_telemetry/hott_telemetry_main.c +++ b/apps/hott_telemetry/hott_telemetry_main.c @@ -51,6 +51,7 @@ #include <stdio.h> #include <string.h> #include <termios.h> +#include <sys/ioctl.h> #include <unistd.h> #include <systemlib/systemlib.h> diff --git a/apps/mavlink/mavlink_receiver.c b/apps/mavlink/mavlink_receiver.c index ccca8bdc6..510d2f3e4 100644 --- a/apps/mavlink/mavlink_receiver.c +++ b/apps/mavlink/mavlink_receiver.c @@ -586,12 +586,12 @@ receive_thread(void *arg) struct pollfd fds[] = { { .fd = uart_fd, .events = POLLIN } }; if (poll(fds, 1, timeout) > 0) { - /* non-blocking read */ - size_t nread = read(uart_fd, buf, sizeof(buf)); - ASSERT(nread > 0) + /* non-blocking read. read may return negative values */ + ssize_t nread = read(uart_fd, buf, sizeof(buf)); - for (size_t i = 0; i < nread; i++) { - if (mavlink_parse_char(chan, buf[i], &msg, &status)) { //parse the char + /* if read failed, this loop won't execute */ + for (ssize_t i = 0; i < nread; i++) { + if (mavlink_parse_char(chan, buf[i], &msg, &status)) { /* handle generic messages and commands */ handle_message(&msg); diff --git a/nuttx/binfmt/libelf/Kconfig b/nuttx/binfmt/libelf/Kconfig new file mode 100644 index 000000000..f6f579276 --- /dev/null +++ b/nuttx/binfmt/libelf/Kconfig @@ -0,0 +1,40 @@ +# +# For a description of the syntax of this configuration file, +# see misc/tools/kconfig-language.txt. +# + +config ELF_ALIGN_LOG2 + int "Log2 Section Alignment" + default 2 + ---help--- + Align all sections to this Log2 value: 0->1, 1->2, 2->4, etc. + +config ELF_STACKSIZE + int "ELF Stack Size" + default 2048 + ---help--- + This is the default stack size that will will be used when starting ELF binaries. + +config ELF_BUFFERSIZE + int "ELF I/O Buffer Size" + default 128 + ---help--- + This is an I/O buffer that is used to access the ELF file. Variable length items + will need to be read (such as symbol names). This is really just this initial + size of the buffer; it will be reallocated as necessary to hold large symbol + names). Default: 128 + +config ELF_BUFFERINCR + int "ELF I/O Buffer Realloc Increment" + default 32 + ---help--- + This is an I/O buffer that is used to access the ELF file. Variable length items + will need to be read (such as symbol names). This value specifies the size + increment to use each time the buffer is reallocated. Default: 32 + +config ELF_DUMPBUFFER + bool "Dump ELF buffers" + default n + depends on DEBUG && DEBUG_VERBOSE + ---help--- + Dump various ELF buffers for debug purposes diff --git a/nuttx/binfmt/libelf/gnu-elf.ld b/nuttx/binfmt/libelf/gnu-elf.ld new file mode 100644 index 000000000..b2a3dc113 --- /dev/null +++ b/nuttx/binfmt/libelf/gnu-elf.ld @@ -0,0 +1,129 @@ +/**************************************************************************** + * binfmt/libelf/gnu-elf.ld + * + * Copyright (C) 2012 Gregory Nutt. All rights reserved. + * Author: Gregory Nutt <gnutt@nuttx.org> + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * 3. Neither the name NuttX nor the names of its contributors may be + * used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, + * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS + * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED + * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN + * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + * + ****************************************************************************/ + +SECTIONS +{ + .text 0x00000000 : + { + _stext = . ; + *(.text) + *(.text.*) + *(.gnu.warning) + *(.stub) + *(.glue_7) + *(.glue_7t) + *(.jcr) + + /* C++ support: The .init and .fini sections contain specific logic + * to manage static constructors and destructors. + */ + + *(.gnu.linkonce.t.*) + *(.init) /* Old ABI */ + *(.fini) /* Old ABI */ + _etext = . ; + } + + .rodata : + { + _srodata = . ; + *(.rodata) + *(.rodata1) + *(.rodata.*) + *(.gnu.linkonce.r*) + _erodata = . ; + } + + .data : + { + _sdata = . ; + *(.data) + *(.data1) + *(.data.*) + *(.gnu.linkonce.d*) + _edata = . ; + } + + /* C++ support. For each global and static local C++ object, + * GCC creates a small subroutine to construct the object. Pointers + * to these routines (not the routines themselves) are stored as + * simple, linear arrays in the .ctors section of the object file. + * Similarly, pointers to global/static destructor routines are + * stored in .dtors. + */ + + .ctors : + { + _sctors = . ; + *(.ctors) /* Old ABI: Unallocated */ + *(.init_array) /* New ABI: Allocated */ + _edtors = . ; + } + + .dtors : + { + _sdtors = . ; + *(.dtors) /* Old ABI: Unallocated */ + *(.fini_array) /* New ABI: Allocated */ + _edtors = . ; + } + + .bss : + { + _sbss = . ; + *(.bss) + *(.bss.*) + *(.sbss) + *(.sbss.*) + *(.gnu.linkonce.b*) + *(COMMON) + _ebss = . ; + } + + /* Stabs debugging sections. */ + + .stab 0 : { *(.stab) } + .stabstr 0 : { *(.stabstr) } + .stab.excl 0 : { *(.stab.excl) } + .stab.exclstr 0 : { *(.stab.exclstr) } + .stab.index 0 : { *(.stab.index) } + .stab.indexstr 0 : { *(.stab.indexstr) } + .comment 0 : { *(.comment) } + .debug_abbrev 0 : { *(.debug_abbrev) } + .debug_info 0 : { *(.debug_info) } + .debug_line 0 : { *(.debug_line) } + .debug_pubnames 0 : { *(.debug_pubnames) } + .debug_aranges 0 : { *(.debug_aranges) } +} diff --git a/nuttx/binfmt/libelf/libelf_ctors.c b/nuttx/binfmt/libelf/libelf_ctors.c new file mode 100644 index 000000000..20f1256e2 --- /dev/null +++ b/nuttx/binfmt/libelf/libelf_ctors.c @@ -0,0 +1,215 @@ +/**************************************************************************** + * binfmt/libelf/libelf_ctors.c + * + * Copyright (C) 2012 Gregory Nutt. All rights reserved. + * Author: Gregory Nutt <gnutt@nuttx.org> + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * 3. Neither the name NuttX nor the names of its contributors may be + * used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, + * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS + * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED + * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN + * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + * + ****************************************************************************/ + +/**************************************************************************** + * Included Files + ****************************************************************************/ + +#include <nuttx/config.h> + +#include <string.h> +#include <errno.h> +#include <assert.h> +#include <debug.h> + +#include <nuttx/kmalloc.h> +#include <nuttx/binfmt/elf.h> + +#include "libelf.h" + +#ifdef CONFIG_BINFMT_CONSTRUCTORS + +/**************************************************************************** + * Pre-Processor Definitions + ****************************************************************************/ + +/**************************************************************************** + * Private Types + ****************************************************************************/ + +/**************************************************************************** + * Private Constant Data + ****************************************************************************/ + +/**************************************************************************** + * Private Functions + ****************************************************************************/ + +/**************************************************************************** + * Public Functions + ****************************************************************************/ + +/**************************************************************************** + * Name: elf_loadctors + * + * Description: + * Load pointers to static constructors into an in-memory array. + * + * Input Parameters: + * loadinfo - Load state information + * + * Returned Value: + * 0 (OK) is returned on success and a negated errno is returned on + * failure. + * + ****************************************************************************/ + +int elf_loadctors(FAR struct elf_loadinfo_s *loadinfo) +{ + FAR Elf32_Shdr *shdr; + size_t ctorsize; + int ctoridx; + int ret; + int i; + + DEBUGASSERT(loadinfo->ctors == NULL); + + /* Allocate an I/O buffer if necessary. This buffer is used by + * elf_sectname() to accumulate the variable length symbol name. + */ + + ret = elf_allocbuffer(loadinfo); + if (ret < 0) + { + bdbg("elf_allocbuffer failed: %d\n", ret); + return -ENOMEM; + } + + /* Find the index to the section named ".ctors." NOTE: On old ABI system, + * .ctors is the name of the section containing the list of constructors; + * On newer systems, the similar section is called .init_array. It is + * expected that the linker script will force the section name to be ".ctors" + * in either case. + */ + + ctoridx = elf_findsection(loadinfo, ".ctors"); + if (ctoridx < 0) + { + /* This may not be a failure. -ENOENT indicates that the file has no + * static constructor section. + */ + + bvdbg("elf_findsection .ctors section failed: %d\n", ctoridx); + return ret == -ENOENT ? OK : ret; + } + + /* Now we can get a pointer to the .ctor section in the section header + * table. + */ + + shdr = &loadinfo->shdr[ctoridx]; + + /* Get the size of the .ctor section and the number of constructors that + * will need to be called. + */ + + ctorsize = shdr->sh_size; + loadinfo->nctors = ctorsize / sizeof(binfmt_ctor_t); + + bvdbg("ctoridx=%d ctorsize=%d sizeof(binfmt_ctor_t)=%d nctors=%d\n", + ctoridx, ctorsize, sizeof(binfmt_ctor_t), loadinfo->nctors); + + /* Check if there are any constructors. It is not an error if there + * are none. + */ + + if (loadinfo->nctors > 0) + { + /* Check an assumption that we made above */ + + DEBUGASSERT(shdr->sh_size == loadinfo->nctors * sizeof(binfmt_ctor_t)); + + /* In the old ABI, the .ctors section is not allocated. In that case, + * we need to allocate memory to hold the .ctors and then copy the + * from the file into the allocated memory. + * + * SHF_ALLOC indicates that the section requires memory during + * execution. + */ + + if ((shdr->sh_flags & SHF_ALLOC) == 0) + { + /* Allocate memory to hold a copy of the .ctor section */ + + loadinfo->ctoralloc = (binfmt_ctor_t*)kmalloc(ctorsize); + if (!loadinfo->ctoralloc) + { + bdbg("Failed to allocate memory for .ctors\n"); + return -ENOMEM; + } + + loadinfo->ctors = (binfmt_ctor_t *)loadinfo->ctoralloc; + + /* Read the section header table into memory */ + + ret = elf_read(loadinfo, (FAR uint8_t*)loadinfo->ctors, ctorsize, + shdr->sh_offset); + if (ret < 0) + { + bdbg("Failed to allocate .ctors: %d\n", ret); + return ret; + } + + /* Fix up all of the .ctor addresses. Since the addresses + * do not lie in allocated memory, there will be no relocation + * section for them. + */ + + for (i = 0; i < loadinfo->nctors; i++) + { + FAR uintptr_t *ptr = (uintptr_t *)((FAR void *)(&loadinfo->ctors)[i]); + + bvdbg("ctor %d: %08lx + %08lx = %08lx\n", + i, *ptr, loadinfo->elfalloc, *ptr + loadinfo->elfalloc); + + *ptr += loadinfo->elfalloc; + } + } + else + { + + /* Save the address of the .ctors (actually, .init_array) where it was + * loaded into memory. Since the .ctors lie in allocated memory, they + * will be relocated via the normal mechanism. + */ + + loadinfo->ctors = (binfmt_ctor_t*)shdr->sh_addr; + } + } + + return OK; +} + +#endif /* CONFIG_BINFMT_CONSTRUCTORS */ diff --git a/nuttx/binfmt/libelf/libelf_dtors.c b/nuttx/binfmt/libelf/libelf_dtors.c new file mode 100644 index 000000000..c0c73a337 --- /dev/null +++ b/nuttx/binfmt/libelf/libelf_dtors.c @@ -0,0 +1,215 @@ +/**************************************************************************** + * binfmt/libelf/libelf_dtors.c + * + * Copyright (C) 2012 Gregory Nutt. All rights reserved. + * Author: Gregory Nutt <gnutt@nuttx.org> + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * 3. Neither the name NuttX nor the names of its contributors may be + * used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, + * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS + * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED + * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN + * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + * + ****************************************************************************/ + +/**************************************************************************** + * Included Files + ****************************************************************************/ + +#include <nuttx/config.h> + +#include <string.h> +#include <errno.h> +#include <assert.h> +#include <debug.h> + +#include <nuttx/kmalloc.h> +#include <nuttx/binfmt/elf.h> + +#include "libelf.h" + +#ifdef CONFIG_BINFMT_CONSTRUCTORS + +/**************************************************************************** + * Pre-Processor Definitions + ****************************************************************************/ + +/**************************************************************************** + * Private Types + ****************************************************************************/ + +/**************************************************************************** + * Private Constant Data + ****************************************************************************/ + +/**************************************************************************** + * Private Functions + ****************************************************************************/ + +/**************************************************************************** + * Public Functions + ****************************************************************************/ + +/**************************************************************************** + * Name: elf_loaddtors + * + * Description: + * Load pointers to static destructors into an in-memory array. + * + * Input Parameters: + * loadinfo - Load state information + * + * Returned Value: + * 0 (OK) is returned on success and a negated errno is returned on + * failure. + * + ****************************************************************************/ + +int elf_loaddtors(FAR struct elf_loadinfo_s *loadinfo) +{ + FAR Elf32_Shdr *shdr; + size_t dtorsize; + int dtoridx; + int ret; + int i; + + DEBUGASSERT(loadinfo->dtors == NULL); + + /* Allocate an I/O buffer if necessary. This buffer is used by + * elf_sectname() to accumulate the variable length symbol name. + */ + + ret = elf_allocbuffer(loadinfo); + if (ret < 0) + { + bdbg("elf_allocbuffer failed: %d\n", ret); + return -ENOMEM; + } + + /* Find the index to the section named ".dtors." NOTE: On old ABI system, + * .dtors is the name of the section containing the list of destructors; + * On newer systems, the similar section is called .fini_array. It is + * expected that the linker script will force the section name to be ".dtors" + * in either case. + */ + + dtoridx = elf_findsection(loadinfo, ".dtors"); + if (dtoridx < 0) + { + /* This may not be a failure. -ENOENT indicates that the file has no + * static destructor section. + */ + + bvdbg("elf_findsection .dtors section failed: %d\n", dtoridx); + return ret == -ENOENT ? OK : ret; + } + + /* Now we can get a pointer to the .dtor section in the section header + * table. + */ + + shdr = &loadinfo->shdr[dtoridx]; + + /* Get the size of the .dtor section and the number of destructors that + * will need to be called. + */ + + dtorsize = shdr->sh_size; + loadinfo->ndtors = dtorsize / sizeof(binfmt_dtor_t); + + bvdbg("dtoridx=%d dtorsize=%d sizeof(binfmt_dtor_t)=%d ndtors=%d\n", + dtoridx, dtorsize, sizeof(binfmt_dtor_t), loadinfo->ndtors); + + /* Check if there are any destructors. It is not an error if there + * are none. + */ + + if (loadinfo->ndtors > 0) + { + /* Check an assumption that we made above */ + + DEBUGASSERT(shdr->sh_size == loadinfo->ndtors * sizeof(binfmt_dtor_t)); + + /* In the old ABI, the .dtors section is not allocated. In that case, + * we need to allocate memory to hold the .dtors and then copy the + * from the file into the allocated memory. + * + * SHF_ALLOC indicates that the section requires memory during + * execution. + */ + + if ((shdr->sh_flags & SHF_ALLOC) == 0) + { + /* Allocate memory to hold a copy of the .dtor section */ + + loadinfo->ctoralloc = (binfmt_dtor_t*)kmalloc(dtorsize); + if (!loadinfo->ctoralloc) + { + bdbg("Failed to allocate memory for .dtors\n"); + return -ENOMEM; + } + + loadinfo->dtors = (binfmt_dtor_t *)loadinfo->ctoralloc; + + /* Read the section header table into memory */ + + ret = elf_read(loadinfo, (FAR uint8_t*)loadinfo->dtors, dtorsize, + shdr->sh_offset); + if (ret < 0) + { + bdbg("Failed to allocate .dtors: %d\n", ret); + return ret; + } + + /* Fix up all of the .dtor addresses. Since the addresses + * do not lie in allocated memory, there will be no relocation + * section for them. + */ + + for (i = 0; i < loadinfo->ndtors; i++) + { + FAR uintptr_t *ptr = (uintptr_t *)((FAR void *)(&loadinfo->dtors)[i]); + + bvdbg("dtor %d: %08lx + %08lx = %08lx\n", + i, *ptr, loadinfo->elfalloc, *ptr + loadinfo->elfalloc); + + *ptr += loadinfo->elfalloc; + } + } + else + { + + /* Save the address of the .dtors (actually, .init_array) where it was + * loaded into memory. Since the .dtors lie in allocated memory, they + * will be relocated via the normal mechanism. + */ + + loadinfo->dtors = (binfmt_dtor_t*)shdr->sh_addr; + } + } + + return OK; +} + +#endif /* CONFIG_BINFMT_CONSTRUCTORS */ diff --git a/nuttx/binfmt/libelf/libelf_init.c b/nuttx/binfmt/libelf/libelf_init.c new file mode 100644 index 000000000..fa4b7983c --- /dev/null +++ b/nuttx/binfmt/libelf/libelf_init.c @@ -0,0 +1,202 @@ +/**************************************************************************** + * binfmt/libelf/libelf_init.c + * + * Copyright (C) 2012 Gregory Nutt. All rights reserved. + * Author: Gregory Nutt <gnutt@nuttx.org> + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * 3. Neither the name NuttX nor the names of its contributors may be + * used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, + * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS + * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED + * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN + * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + * + ****************************************************************************/ + +/**************************************************************************** + * Included Files + ****************************************************************************/ + +#include <nuttx/config.h> + +#include <sys/stat.h> + +#include <stdint.h> +#include <string.h> +#include <fcntl.h> +#include <elf32.h> +#include <debug.h> +#include <errno.h> + +#include <nuttx/binfmt/elf.h> + +#include "libelf.h" + +/**************************************************************************** + * Pre-Processor Definitions + ****************************************************************************/ + +/* CONFIG_DEBUG, CONFIG_DEBUG_VERBOSE, and CONFIG_DEBUG_BINFMT have to be + * defined or CONFIG_ELF_DUMPBUFFER does nothing. + */ + +#if !defined(CONFIG_DEBUG_VERBOSE) || !defined (CONFIG_DEBUG_BINFMT) +# undef CONFIG_ELF_DUMPBUFFER +#endif + +#ifdef CONFIG_ELF_DUMPBUFFER +# define elf_dumpbuffer(m,b,n) bvdbgdumpbuffer(m,b,n) +#else +# define elf_dumpbuffer(m,b,n) +#endif + +/**************************************************************************** + * Private Constant Data + ****************************************************************************/ + +/**************************************************************************** + * Private Functions + ****************************************************************************/ + +/**************************************************************************** + * Name: elf_filelen + * + * Description: + * Get the size of the ELF file + * + * Returned Value: + * 0 (OK) is returned on success and a negated errno is returned on + * failure. + * + ****************************************************************************/ + +static inline int elf_filelen(FAR struct elf_loadinfo_s *loadinfo, + FAR const char *filename) +{ + struct stat buf; + int ret; + + /* Get the file stats */ + + ret = stat(filename, &buf); + if (ret < 0) + { + int errval = errno; + bdbg("Failed to fstat file: %d\n", errval); + return -errval; + } + + /* Verify that it is a regular file */ + + if (!S_ISREG(buf.st_mode)) + { + bdbg("Not a regular file. mode: %d\n", buf.st_mode); + return -ENOENT; + } + + /* TODO: Verify that the file is readable. Not really important because + * we will detect this when we try to open the file read-only. + */ + + /* Return the size of the file in the loadinfo structure */ + + loadinfo->filelen = buf.st_size; + return OK; +} + +/**************************************************************************** + * Public Functions + ****************************************************************************/ + +/**************************************************************************** + * Name: elf_init + * + * Description: + * This function is called to configure the library to process an ELF + * program binary. + * + * Returned Value: + * 0 (OK) is returned on success and a negated errno is returned on + * failure. + * + ****************************************************************************/ + +int elf_init(FAR const char *filename, FAR struct elf_loadinfo_s *loadinfo) +{ + int ret; + + bvdbg("filename: %s loadinfo: %p\n", filename, loadinfo); + + /* Clear the load info structure */ + + memset(loadinfo, 0, sizeof(struct elf_loadinfo_s)); + + /* Get the length of the file. */ + + ret = elf_filelen(loadinfo, filename); + if (ret < 0) + { + bdbg("elf_filelen failed: %d\n", ret); + return ret; + } + + /* Open the binary file for reading (only) */ + + loadinfo->filfd = open(filename, O_RDONLY); + if (loadinfo->filfd < 0) + { + int errval = errno; + bdbg("Failed to open ELF binary %s: %d\n", filename, errval); + return -errval; + } + + /* Read the ELF ehdr from offset 0 */ + + ret = elf_read(loadinfo, (FAR uint8_t*)&loadinfo->ehdr, sizeof(Elf32_Ehdr), 0); + if (ret < 0) + { + bdbg("Failed to read ELF header: %d\n", ret); + return ret; + } + + elf_dumpbuffer("ELF header", (FAR const uint8_t*)&loadinfo->ehdr, sizeof(Elf32_Ehdr)); + + /* Verify the ELF header */ + + ret = elf_verifyheader(&loadinfo->ehdr); + if (ret <0) + { + /* This may not be an error because we will be called to attempt loading + * EVERY binary. If elf_verifyheader() does not recognize the ELF header, + * it will -ENOEXEC whcih simply informs the system that the file is not an + * ELF file. elf_verifyheader() will return other errors if the ELF header + * is not correctly formed. + */ + + bdbg("Bad ELF header: %d\n", ret); + return ret; + } + + return OK; +} + diff --git a/nuttx/binfmt/libelf/libelf_iobuffer.c b/nuttx/binfmt/libelf/libelf_iobuffer.c new file mode 100644 index 000000000..ead99ca09 --- /dev/null +++ b/nuttx/binfmt/libelf/libelf_iobuffer.c @@ -0,0 +1,136 @@ +/**************************************************************************** + * binfmt/libelf/elf_iobuffer.c + * + * Copyright (C) 2012 Gregory Nutt. All rights reserved. + * Author: Gregory Nutt <gnutt@nuttx.org> + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * 3. Neither the name NuttX nor the names of its contributors may be + * used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, + * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS + * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED + * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN + * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + * + ****************************************************************************/ + +/**************************************************************************** + * Included Files + ****************************************************************************/ + +#include <nuttx/config.h> + +#include <debug.h> +#include <errno.h> + +#include <nuttx/kmalloc.h> +#include <nuttx/binfmt/elf.h> + +#include "libelf.h" + +/**************************************************************************** + * Pre-processor Definitions + ****************************************************************************/ + +/**************************************************************************** + * Private Constant Data + ****************************************************************************/ + +/**************************************************************************** + * Private Functions + ****************************************************************************/ + +/**************************************************************************** + * Public Functions + ****************************************************************************/ + +/**************************************************************************** + * Name: elf_allocbuffer + * + * Description: + * Perform the initial allocation of the I/O buffer, if it has not already + * been allocated. + * + * Returned Value: + * 0 (OK) is returned on success and a negated errno is returned on + * failure. + * + ****************************************************************************/ + +int elf_allocbuffer(FAR struct elf_loadinfo_s *loadinfo) +{ + /* Has a buffer been allocated> */ + + if (!loadinfo->iobuffer) + { + /* No.. allocate one now */ + + loadinfo->iobuffer = (FAR uint8_t *)kmalloc(CONFIG_ELF_BUFFERSIZE); + if (!loadinfo->iobuffer) + { + bdbg("Failed to allocate an I/O buffer\n"); + return -ENOMEM; + } + + loadinfo->buflen = CONFIG_ELF_BUFFERSIZE; + } + + return OK; +} + +/**************************************************************************** + * Name: elf_reallocbuffer + * + * Description: + * Increase the size of I/O buffer by the specified buffer increment. + * + * Returned Value: + * 0 (OK) is returned on success and a negated errno is returned on + * failure. + * + ****************************************************************************/ + +int elf_reallocbuffer(FAR struct elf_loadinfo_s *loadinfo, size_t increment) +{ + FAR void *buffer; + size_t newsize; + + /* Get the new size of the allocation */ + + newsize = loadinfo->buflen + increment; + + /* And perform the reallocation */ + + buffer = krealloc((FAR void *)loadinfo->iobuffer, newsize); + if (!buffer) + { + bdbg("Failed to reallocate the I/O buffer\n"); + return -ENOMEM; + } + + /* Save the new buffer info */ + + loadinfo->iobuffer = buffer; + loadinfo->buflen = newsize; + return OK; +} + diff --git a/nuttx/binfmt/libelf/libelf_sections.c b/nuttx/binfmt/libelf/libelf_sections.c new file mode 100644 index 000000000..c41793544 --- /dev/null +++ b/nuttx/binfmt/libelf/libelf_sections.c @@ -0,0 +1,284 @@ +/**************************************************************************** + * binfmt/libelf/libelf_sections.c + * + * Copyright (C) 2012 Gregory Nutt. All rights reserved. + * Author: Gregory Nutt <gnutt@nuttx.org> + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * 3. Neither the name NuttX nor the names of its contributors may be + * used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, + * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS + * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED + * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN + * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + * + ****************************************************************************/ + +/**************************************************************************** + * Included Files + ****************************************************************************/ + +#include <nuttx/config.h> + +#include <stdlib.h> +#include <string.h> +#include <assert.h> +#include <errno.h> +#include <debug.h> + +#include <nuttx/kmalloc.h> +#include <nuttx/binfmt/elf.h> + +#include "libelf.h" + +/**************************************************************************** + * Pre-Processor Definitions + ****************************************************************************/ + +/**************************************************************************** + * Private Constant Data + ****************************************************************************/ + +/**************************************************************************** + * Private Functions + ****************************************************************************/ + +/**************************************************************************** + * Name: elf_sectname + * + * Description: + * Get the symbol name in loadinfo->iobuffer[]. + * + * Returned Value: + * 0 (OK) is returned on success and a negated errno is returned on + * failure. + * + ****************************************************************************/ + +static inline int elf_sectname(FAR struct elf_loadinfo_s *loadinfo, + FAR const Elf32_Shdr *shdr) +{ + FAR Elf32_Shdr *shstr; + FAR uint8_t *buffer; + off_t offset; + size_t readlen; + size_t bytesread; + int shstrndx; + int ret; + + /* Get the section header table index of the entry associated with the + * section name string table. If the file has no section name string table, + * this member holds the value SH_UNDEF. + */ + + shstrndx = loadinfo->ehdr.e_shstrndx; + if (shstrndx == SHN_UNDEF) + { + bdbg("No section header string table\n"); + return -EINVAL; + } + + /* Get the section name string table section header */ + + shstr = &loadinfo->shdr[shstrndx]; + + /* Get the file offset to the string that is the name of the section. This + * is the sum of: + * + * shstr->sh_offset: The file offset to the first byte of the section + * header string table data. + * shdr->sh_name: The offset to the name of the section in the section + * name table + */ + + offset = shstr->sh_offset + shdr->sh_name; + + /* Loop until we get the entire section name into memory */ + + buffer = loadinfo->iobuffer; + bytesread = 0; + + for (;;) + { + /* Get the number of bytes to read */ + + readlen = loadinfo->buflen - bytesread; + if (offset + readlen > loadinfo->filelen) + { + readlen = loadinfo->filelen - offset; + if (readlen <= 0) + { + bdbg("At end of file\n"); + return -EINVAL; + } + } + + /* Read that number of bytes into the array */ + + buffer = &loadinfo->iobuffer[bytesread]; + ret = elf_read(loadinfo, buffer, readlen, offset); + if (ret < 0) + { + bdbg("Failed to read section name\n"); + return ret; + } + + bytesread += readlen; + + /* Did we read the NUL terminator? */ + + if (memchr(buffer, '\0', readlen) != NULL) + { + /* Yes, the buffer contains a NUL terminator. */ + + return OK; + } + + /* No.. then we have to read more */ + + ret = elf_reallocbuffer(loadinfo, CONFIG_ELF_BUFFERINCR); + if (ret < 0) + { + bdbg("elf_reallocbuffer failed: %d\n", ret); + return ret; + } + } + + /* We will not get here */ + + return OK; +} + +/**************************************************************************** + * Public Functions + ****************************************************************************/ + +/**************************************************************************** + * Name: elf_loadshdrs + * + * Description: + * Loads section headers into memory. + * + * Returned Value: + * 0 (OK) is returned on success and a negated errno is returned on + * failure. + * + ****************************************************************************/ + +int elf_loadshdrs(FAR struct elf_loadinfo_s *loadinfo) +{ + size_t shdrsize; + int ret; + + DEBUGASSERT(loadinfo->shdr == NULL); + + /* Verify that there are sections */ + + if (loadinfo->ehdr.e_shnum < 1) + { + bdbg("No sections(?)\n"); + return -EINVAL; + } + + /* Get the total size of the section header table */ + + shdrsize = (size_t)loadinfo->ehdr.e_shentsize * (size_t)loadinfo->ehdr.e_shnum; + if(loadinfo->ehdr.e_shoff + shdrsize > loadinfo->filelen) + { + bdbg("Insufficent space in file for section header table\n"); + return -ESPIPE; + } + + /* Allocate memory to hold a working copy of the sector header table */ + + loadinfo->shdr = (FAR Elf32_Shdr*)kmalloc(shdrsize); + if (!loadinfo->shdr) + { + bdbg("Failed to allocate the section header table. Size: %ld\n", (long)shdrsize); + return -ENOMEM; + } + + /* Read the section header table into memory */ + + ret = elf_read(loadinfo, (FAR uint8_t*)loadinfo->shdr, shdrsize, loadinfo->ehdr.e_shoff); + if (ret < 0) + { + bdbg("Failed to read section header table: %d\n", ret); + } + + return ret; +} + +/**************************************************************************** + * Name: elf_findsection + * + * Description: + * A section by its name. + * + * Input Parameters: + * loadinfo - Load state information + * sectname - Name of the section to find + * + * Returned Value: + * On success, the index to the section is returned; A negated errno value + * is returned on failure. + * + ****************************************************************************/ + +int elf_findsection(FAR struct elf_loadinfo_s *loadinfo, + FAR const char *sectname) +{ + FAR const Elf32_Shdr *shdr; + int ret; + int i; + + /* Search through the shdr[] array in loadinfo for a section named 'sectname' */ + + for (i = 0; i < loadinfo->ehdr.e_shnum; i++) + { + /* Get the name of this section */ + + shdr = &loadinfo->shdr[i]; + ret = elf_sectname(loadinfo, shdr); + if (ret < 0) + { + bdbg("elf_sectname failed: %d\n", ret); + return ret; + } + + /* Check if the name of this section is 'sectname' */ + + bvdbg("%d. Comparing \"%s\" and .\"%s\"\n", + i, loadinfo->iobuffer, sectname); + + if (strcmp((FAR const char *)loadinfo->iobuffer, sectname) == 0) + { + /* We found it... return the index */ + + return i; + } + } + + /* We failed to find a section with this name. */ + + return -ENOENT; +} diff --git a/nuttx/binfmt/libelf/libelf_symbols.c b/nuttx/binfmt/libelf/libelf_symbols.c new file mode 100644 index 000000000..2d94b11af --- /dev/null +++ b/nuttx/binfmt/libelf/libelf_symbols.c @@ -0,0 +1,329 @@ +/**************************************************************************** + * binfmt/libelf/libelf_symbols.c + * + * Copyright (C) 2012 Gregory Nutt. All rights reserved. + * Author: Gregory Nutt <gnutt@nuttx.org> + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * 3. Neither the name NuttX nor the names of its contributors may be + * used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, + * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS + * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED + * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN + * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + * + ****************************************************************************/ + +/**************************************************************************** + * Included Files + ****************************************************************************/ + +#include <nuttx/config.h> + +#include <stdlib.h> +#include <string.h> +#include <elf32.h> +#include <errno.h> +#include <debug.h> + +#include <nuttx/binfmt/elf.h> +#include <nuttx/binfmt/symtab.h> + +#include "libelf.h" + +/**************************************************************************** + * Pre-Processor Definitions + ****************************************************************************/ + +#ifndef CONFIG_ELF_BUFFERINCR +# define CONFIG_ELF_BUFFERINCR 32 +#endif + +/**************************************************************************** + * Private Constant Data + ****************************************************************************/ + +/**************************************************************************** + * Private Functions + ****************************************************************************/ + +/**************************************************************************** + * Name: elf_symname + * + * Description: + * Get the symbol name in loadinfo->iobuffer[]. + * + * Returned Value: + * 0 (OK) is returned on success and a negated errno is returned on + * failure. + * + ****************************************************************************/ + +static int elf_symname(FAR struct elf_loadinfo_s *loadinfo, + FAR const Elf32_Sym *sym) +{ + FAR uint8_t *buffer; + off_t offset; + size_t readlen; + size_t bytesread; + int ret; + + /* Get the file offset to the string that is the name of the symbol. The + * st_name member holds an offset into the file's symbol string table. + */ + + if (sym->st_name == 0) + { + bdbg("Symbol has no name\n"); + return -ENOENT; + } + + offset = loadinfo->shdr[loadinfo->strtabidx].sh_offset + sym->st_name; + + /* Loop until we get the entire symbol name into memory */ + + bytesread = 0; + + for (;;) + { + /* Get the number of bytes to read */ + + readlen = loadinfo->buflen - bytesread; + if (offset + readlen > loadinfo->filelen) + { + readlen = loadinfo->filelen - offset; + if (readlen <= 0) + { + bdbg("At end of file\n"); + return -EINVAL; + } + } + + /* Read that number of bytes into the array */ + + buffer = &loadinfo->iobuffer[bytesread]; + ret = elf_read(loadinfo, buffer, readlen, offset); + if (ret < 0) + { + bdbg("elf_read failed: %d\n", ret); + return ret; + } + + bytesread += readlen; + + /* Did we read the NUL terminator? */ + + if (memchr(buffer, '\0', readlen) != NULL) + { + /* Yes, the buffer contains a NUL terminator. */ + + return OK; + } + + /* No.. then we have to read more */ + + ret = elf_reallocbuffer(loadinfo, CONFIG_ELF_BUFFERINCR); + if (ret < 0) + { + bdbg("elf_reallocbuffer failed: %d\n", ret); + return ret; + } + } + + /* We will not get here */ + + return OK; +} + +/**************************************************************************** + * Public Functions + ****************************************************************************/ + +/**************************************************************************** + * Name: elf_findsymtab + * + * Description: + * Find the symbol table section. + * + * Returned Value: + * 0 (OK) is returned on success and a negated errno is returned on + * failure. + * + ****************************************************************************/ + +int elf_findsymtab(FAR struct elf_loadinfo_s *loadinfo) +{ + int i; + + /* Find the symbol table section header and its associated string table */ + + for (i = 1; i < loadinfo->ehdr.e_shnum; i++) + { + if (loadinfo->shdr[i].sh_type == SHT_SYMTAB) + { + loadinfo->symtabidx = i; + loadinfo->strtabidx = loadinfo->shdr[i].sh_link; + break; + } + } + + /* Verify that there is a symbol and string table */ + + if (loadinfo->symtabidx == 0) + { + bdbg("No symbols in ELF file\n"); + return -EINVAL; + } + + return OK; +} + +/**************************************************************************** + * Name: elf_readsym + * + * Description: + * Read the ELFT symbol structure at the specfied index into memory. + * + * Input Parameters: + * loadinfo - Load state information + * index - Symbol table index + * sym - Location to return the table entry + * + * Returned Value: + * 0 (OK) is returned on success and a negated errno is returned on + * failure. + * + ****************************************************************************/ + +int elf_readsym(FAR struct elf_loadinfo_s *loadinfo, int index, + FAR Elf32_Sym *sym) +{ + FAR Elf32_Shdr *symtab = &loadinfo->shdr[loadinfo->symtabidx]; + off_t offset; + + /* Verify that the symbol table index lies within symbol table */ + + if (index < 0 || index > (symtab->sh_size / sizeof(Elf32_Sym))) + { + bdbg("Bad relocation symbol index: %d\n", index); + return -EINVAL; + } + + /* Get the file offset to the symbol table entry */ + + offset = symtab->sh_offset + sizeof(Elf32_Sym) * index; + + /* And, finally, read the symbol table entry into memory */ + + return elf_read(loadinfo, (FAR uint8_t*)sym, sizeof(Elf32_Sym), offset); +} + +/**************************************************************************** + * Name: elf_symvalue + * + * Description: + * Get the value of a symbol. The updated value of the symbol is returned + * in the st_value field of the symbol table entry. + * + * Input Parameters: + * loadinfo - Load state information + * sym - Symbol table entry (value might be undefined) + * + * Returned Value: + * 0 (OK) is returned on success and a negated errno is returned on + * failure. + * + ****************************************************************************/ + +int elf_symvalue(FAR struct elf_loadinfo_s *loadinfo, FAR Elf32_Sym *sym, + FAR const struct symtab_s *exports, int nexports) +{ + FAR const struct symtab_s *symbol; + uintptr_t secbase; + int ret; + + switch (sym->st_shndx) + { + case SHN_COMMON: + { + /* NuttX ELF modules should be compiled with -fno-common. */ + + bdbg("SHN_COMMON: Re-compile with -fno-common\n"); + return -EINVAL; + } + + case SHN_ABS: + { + /* st_value already holds the correct value */ + + bvdbg("SHN_ABS: st_value=%08lx\n", (long)sym->st_value); + return OK; + } + + case SHN_UNDEF: + { + /* Get the name of the undefined symbol */ + + ret = elf_symname(loadinfo, sym); + if (ret < 0) + { + bdbg("SHN_UNDEF: Failed to get symbol name: %d\n", ret); + return ret; + } + + /* Check if the base code exports a symbol of this name */ + +#ifdef CONFIG_SYMTAB_ORDEREDBYNAME + symbol = symtab_findorderedbyname(exports, (FAR char *)loadinfo->iobuffer, nexports); +#else + symbol = symtab_findbyname(exports, (FAR char *)loadinfo->iobuffer, nexports); +#endif + if (!symbol) + { + bdbg("SHN_UNDEF: Exported symbol \"%s\" not found\n", loadinfo->iobuffer); + return -ENOENT; + } + + /* Yes... add the exported symbol value to the ELF symbol table entry */ + + bvdbg("SHN_ABS: name=%s %08x+%08x=%08x\n", + loadinfo->iobuffer, sym->st_value, symbol->sym_value, + sym->st_value + symbol->sym_value); + + sym->st_value += (Elf32_Word)((uintptr_t)symbol->sym_value); + } + break; + + default: + { + secbase = loadinfo->shdr[sym->st_shndx].sh_addr; + + bvdbg("Other: %08x+%08x=%08x\n", + sym->st_value, secbase, sym->st_value + secbase); + + sym->st_value += secbase; + } + break; + } + + return OK; +} diff --git a/nuttx/binfmt/libelf/libelf_uninit.c b/nuttx/binfmt/libelf/libelf_uninit.c new file mode 100644 index 000000000..3ec6f6c61 --- /dev/null +++ b/nuttx/binfmt/libelf/libelf_uninit.c @@ -0,0 +1,126 @@ +/**************************************************************************** + * binfmt/libelf/libelf_uninit.c + * + * Copyright (C) 2012 Gregory Nutt. All rights reserved. + * Author: Gregory Nutt <gnutt@nuttx.org> + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * 3. Neither the name NuttX nor the names of its contributors may be + * used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, + * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS + * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED + * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN + * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + * + ****************************************************************************/ + +/**************************************************************************** + * Included Files + ****************************************************************************/ + +#include <nuttx/config.h> + +#include <unistd.h> +#include <debug.h> +#include <errno.h> + +#include <nuttx/kmalloc.h> +#include <nuttx/binfmt/elf.h> + +#include "libelf.h" + +/**************************************************************************** + * Pre-Processor Definitions + ****************************************************************************/ + +/**************************************************************************** + * Private Constant Data + ****************************************************************************/ + +/**************************************************************************** + * Private Functions + ****************************************************************************/ + +/**************************************************************************** + * Public Functions + ****************************************************************************/ + +/**************************************************************************** + * Name: elf_uninit + * + * Description: + * Releases any resources committed by elf_init(). This essentially + * undoes the actions of elf_init. + * + * Returned Value: + * 0 (OK) is returned on success and a negated errno is returned on + * failure. + * + ****************************************************************************/ + +int elf_uninit(struct elf_loadinfo_s *loadinfo) +{ + /* Free all working buffers */ + + elf_freebuffers(loadinfo); + + /* Close the ELF file */ + + if (loadinfo->filfd >= 0) + { + close(loadinfo->filfd); + } + + return OK; +} + +/**************************************************************************** + * Name: elf_freebuffers + * + * Description: + * Release all working buffers. + * + * Returned Value: + * 0 (OK) is returned on success and a negated errno is returned on + * failure. + * + ****************************************************************************/ + +int elf_freebuffers(struct elf_loadinfo_s *loadinfo) +{ + /* Release all working allocations */ + + if (loadinfo->shdr) + { + kfree((FAR void *)loadinfo->shdr); + loadinfo->shdr = NULL; + } + + if (loadinfo->iobuffer) + { + kfree((FAR void *)loadinfo->iobuffer); + loadinfo->iobuffer = NULL; + loadinfo->buflen = 0; + } + + return OK; +} diff --git a/nuttx/binfmt/libelf/libelf_verify.c b/nuttx/binfmt/libelf/libelf_verify.c new file mode 100644 index 000000000..c5f185ec3 --- /dev/null +++ b/nuttx/binfmt/libelf/libelf_verify.c @@ -0,0 +1,120 @@ +/**************************************************************************** + * binfmt/libelf/elf_verify.c + * + * Copyright (C) 2012 Gregory Nutt. All rights reserved. + * Author: Gregory Nutt <gnutt@nuttx.org> + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * 3. Neither the name NuttX nor the names of its contributors may be + * used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, + * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS + * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED + * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN + * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + * + ****************************************************************************/ + +/**************************************************************************** + * Included Files + ****************************************************************************/ + +#include <nuttx/config.h> + +#include <string.h> +#include <debug.h> +#include <errno.h> + +#include <nuttx/binfmt/elf.h> + +/**************************************************************************** + * Pre-processor Definitions + ****************************************************************************/ + +/**************************************************************************** + * Private Constant Data + ****************************************************************************/ + +static const char g_elfmagic[EI_MAGIC_SIZE] = { 0x7f, 'E', 'L', 'F' }; + +/**************************************************************************** + * Private Functions + ****************************************************************************/ + +/**************************************************************************** + * Public Functions + ****************************************************************************/ + +/**************************************************************************** + * Name: elf_verifyheader + * + * Description: + * Given the header from a possible ELF executable, verify that it + * is an ELF executable. + * + * Returned Value: + * 0 (OK) is returned on success and a negated errno is returned on + * failure. + * + * -ENOEXEC : Not an ELF file + * -EINVAL : Not a relocatable ELF file or not supported by the current, + * configured architecture. + * + ****************************************************************************/ + +int elf_verifyheader(FAR const Elf32_Ehdr *ehdr) +{ + if (!ehdr) + { + bdbg("NULL ELF header!"); + return -ENOEXEC; + } + + /* Verify that the magic number indicates an ELF file */ + + if (memcmp(ehdr->e_ident, g_elfmagic, EI_MAGIC_SIZE) != 0) + { + bvdbg("Not ELF magic {%02x, %02x, %02x, %02x}\n", + ehdr->e_ident[0], ehdr->e_ident[1], ehdr->e_ident[2], ehdr->e_ident[3]); + return -ENOEXEC; + } + + /* Verify that this is a relocatable file */ + + if (ehdr->e_type != ET_REL) + { + bdbg("Not a relocatable file: e_type=%d\n", ehdr->e_type); + return -EINVAL; + } + + /* Verify that this file works with the currently configured architecture */ + + if (arch_checkarch(ehdr)) + { + bdbg("Not a supported architecture\n"); + return -ENOEXEC; + } + + /* Looks good so far... we still might find some problems later. */ + + return OK; +} + |