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Message-ID: <20180601000311.lgwempsux7hnz7pn@pburton-laptop>
Date: Thu, 31 May 2018 17:03:11 -0700
From: Paul Burton <paul.burton@...s.com>
To: Thomas Bogendoerfer <tbogendoerfer@...e.de>
CC: Ralf Baechle <ralf@...ux-mips.org>,
James Hogan <jhogan@...nel.org>, <linux-mips@...ux-mips.org>,
<linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] Make elf2ecoff work on 64bit host machines
Hi Thomas,
On Mon, May 28, 2018 at 01:26:24PM +0200, Thomas Bogendoerfer wrote:
> Use fixed width integer types for ecoff structs to make elf2ecoff work
> on 64bit host machines
>
> Signed-off-by: Thomas Bogendoerfer <tbogendoerfer@...e.de>
> ---
> arch/mips/boot/ecoff.h | 58 +++++++++++++++++++++++-----------------------
> arch/mips/boot/elf2ecoff.c | 29 +++++++++++------------
> 2 files changed, 43 insertions(+), 44 deletions(-)
>
> diff --git a/arch/mips/boot/ecoff.h b/arch/mips/boot/ecoff.h
> index b3e73c22c345..9eb4167ef979 100644
> --- a/arch/mips/boot/ecoff.h
> +++ b/arch/mips/boot/ecoff.h
> @@ -3,13 +3,13 @@
> * Some ECOFF definitions.
> */
Perhaps we should #include <stdint.h> before making use of the types it
provides?
I guess if this builds then in practice some other header included by
elf2ecoff.c already pulls it in, but it'd be nice to be explicit about
what ecoff.h needs.
> typedef struct filehdr {
> - unsigned short f_magic; /* magic number */
> - unsigned short f_nscns; /* number of sections */
> - long f_timdat; /* time & date stamp */
> - long f_symptr; /* file pointer to symbolic header */
> - long f_nsyms; /* sizeof(symbolic hdr) */
> - unsigned short f_opthdr; /* sizeof(optional hdr) */
> - unsigned short f_flags; /* flags */
> + uint16_t f_magic; /* magic number */
> + uint16_t f_nscns; /* number of sections */
> + int32_t f_timdat; /* time & date stamp */
> + int32_t f_symptr; /* file pointer to symbolic header */
> + int32_t f_nsyms; /* sizeof(symbolic hdr) */
> + uint16_t f_opthdr; /* sizeof(optional hdr) */
> + uint16_t f_flags; /* flags */
> } FILHDR;
> #define FILHSZ sizeof(FILHDR)
>
> @@ -18,32 +18,32 @@ typedef struct filehdr {
>
> typedef struct scnhdr {
> char s_name[8]; /* section name */
> - long s_paddr; /* physical address, aliased s_nlib */
> - long s_vaddr; /* virtual address */
> - long s_size; /* section size */
> - long s_scnptr; /* file ptr to raw data for section */
> - long s_relptr; /* file ptr to relocation */
> - long s_lnnoptr; /* file ptr to gp histogram */
> - unsigned short s_nreloc; /* number of relocation entries */
> - unsigned short s_nlnno; /* number of gp histogram entries */
> - long s_flags; /* flags */
> + int32_t s_paddr; /* physical address, aliased s_nlib */
> + int32_t s_vaddr; /* virtual address */
> + int32_t s_size; /* section size */
> + int32_t s_scnptr; /* file ptr to raw data for section */
> + int32_t s_relptr; /* file ptr to relocation */
> + int32_t s_lnnoptr; /* file ptr to gp histogram */
> + uint16_t s_nreloc; /* number of relocation entries */
> + uint16_t s_nlnno; /* number of gp histogram entries */
> + int32_t s_flags; /* flags */
> } SCNHDR;
> #define SCNHSZ sizeof(SCNHDR)
> -#define SCNROUND ((long)16)
> +#define SCNROUND ((int32_t)16)
>
> typedef struct aouthdr {
> - short magic; /* see above */
> - short vstamp; /* version stamp */
> - long tsize; /* text size in bytes, padded to DW bdry*/
> - long dsize; /* initialized data " " */
> - long bsize; /* uninitialized data " " */
> - long entry; /* entry pt. */
> - long text_start; /* base of text used for this file */
> - long data_start; /* base of data used for this file */
> - long bss_start; /* base of bss used for this file */
> - long gprmask; /* general purpose register mask */
> - long cprmask[4]; /* co-processor register masks */
> - long gp_value; /* the gp value used for this object */
> + int16_t magic; /* see above */
> + int16_t vstamp; /* version stamp */
> + int32_t tsize; /* text size in bytes, padded to DW bdry*/
> + int32_t dsize; /* initialized data " " */
> + int32_t bsize; /* uninitialized data " " */
> + int32_t entry; /* entry pt. */
> + int32_t text_start; /* base of text used for this file */
> + int32_t data_start; /* base of data used for this file */
> + int32_t bss_start; /* base of bss used for this file */
> + int32_t gprmask; /* general purpose register mask */
> + int32_t cprmask[4]; /* co-processor register masks */
> + int32_t gp_value; /* the gp value used for this object */
> } AOUTHDR;
> #define AOUTHSZ sizeof(AOUTHDR)
>
> diff --git a/arch/mips/boot/elf2ecoff.c b/arch/mips/boot/elf2ecoff.c
> index 266c8137e859..8322282f93b0 100644
> --- a/arch/mips/boot/elf2ecoff.c
> +++ b/arch/mips/boot/elf2ecoff.c
> @@ -55,8 +55,8 @@
> /* -------------------------------------------------------------------- */
>
> struct sect {
> - unsigned long vaddr;
> - unsigned long len;
> + uint32_t vaddr;
> + uint32_t len;
> };
>
> int *symTypeTable;
> @@ -153,16 +153,16 @@ static char *saveRead(int file, off_t offset, off_t len, char *name)
> }
>
> #define swab16(x) \
> - ((unsigned short)( \
> - (((unsigned short)(x) & (unsigned short)0x00ffU) << 8) | \
> - (((unsigned short)(x) & (unsigned short)0xff00U) >> 8) ))
> + ((uint16_t)( \
> + (((uint16_t)(x) & (uint16_t)0x00ffU) << 8) | \
> + (((uint16_t)(x) & (uint16_t)0xff00U) >> 8) ))
>
> #define swab32(x) \
> ((unsigned int)( \
> - (((unsigned int)(x) & (unsigned int)0x000000ffUL) << 24) | \
> - (((unsigned int)(x) & (unsigned int)0x0000ff00UL) << 8) | \
> - (((unsigned int)(x) & (unsigned int)0x00ff0000UL) >> 8) | \
> - (((unsigned int)(x) & (unsigned int)0xff000000UL) >> 24) ))
> + (((uint32_t)(x) & (uint32_t)0x000000ffUL) << 24) | \
> + (((uint32_t)(x) & (uint32_t)0x0000ff00UL) << 8) | \
> + (((uint32_t)(x) & (uint32_t)0x00ff0000UL) >> 8) | \
> + (((uint32_t)(x) & (uint32_t)0xff000000UL) >> 24) ))
>
> static void convert_elf_hdr(Elf32_Ehdr * e)
> {
> @@ -274,7 +274,7 @@ int main(int argc, char *argv[])
> struct aouthdr eah;
> struct scnhdr esecs[6];
> int infile, outfile;
> - unsigned long cur_vma = ULONG_MAX;
> + uint32_t cur_vma = UINT32_MAX;
> int addflag = 0;
> int nosecs;
>
> @@ -518,7 +518,7 @@ int main(int argc, char *argv[])
>
> for (i = 0; i < nosecs; i++) {
> printf
> - ("Section %d: %s phys %lx size %lx file offset %lx\n",
> + ("Section %d: %s phys %x size %x file offset %x\n",
Maybe #include <inttypes.h>, then use PRIx32 & co here & below?
Thanks,
Paul
> i, esecs[i].s_name, esecs[i].s_paddr,
> esecs[i].s_size, esecs[i].s_scnptr);
> }
> @@ -564,17 +564,16 @@ int main(int argc, char *argv[])
> the section can be loaded before copying. */
> if (ph[i].p_type == PT_LOAD && ph[i].p_filesz) {
> if (cur_vma != ph[i].p_vaddr) {
> - unsigned long gap =
> - ph[i].p_vaddr - cur_vma;
> + uint32_t gap = ph[i].p_vaddr - cur_vma;
> char obuf[1024];
> if (gap > 65536) {
> fprintf(stderr,
> - "Intersegment gap (%ld bytes) too large.\n",
> + "Intersegment gap (%d bytes) too large.\n",
> gap);
> exit(1);
> }
> fprintf(stderr,
> - "Warning: %ld byte intersegment gap.\n",
> + "Warning: %d byte intersegment gap.\n",
> gap);
> memset(obuf, 0, sizeof obuf);
> while (gap) {
> --
> 2.13.6
>
>
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