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lm32: add support for LatticeMico32 architecture #38

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116 changes: 115 additions & 1 deletion elf2flt.c
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Original file line number Diff line number Diff line change
Expand Up @@ -62,6 +62,8 @@ const char *elf2flt_progname;
#include <elf/bfin.h>
#elif defined(TARGET_h8300)
#include <elf/h8.h>
#elif defined(TARGET_lm32)
#include <elf/lm32.h>
#elif defined(TARGET_m68k)
#include <elf/m68k.h>
#elif defined(TARGET_microblaze)
Expand Down Expand Up @@ -115,6 +117,12 @@ const char *elf2flt_progname;
#define ARCH "sh2"
#elif defined(TARGET_h8300)
#define ARCH "h8300"
#elif defined(TARGET_lm32)
#define ARCH "lm32"
#define FLAT_LM32_RELOC_TYPE_32_BIT 0
#define FLAT_LM32_RELOC_TYPE_HI16_BIT 1
#define FLAT_LM32_RELOC_TYPE_LO16_BIT 2
#define FLAT_LM32_RELOC_TYPE_PERSIST 3
#elif defined(TARGET_microblaze)
#define ARCH "microblaze"
#elif defined(TARGET_e1)
Expand Down Expand Up @@ -375,7 +383,7 @@ output_relocs (
int bad_relocs = 0;
asymbol **symb;
long nsymb;
#ifdef TARGET_bfin
#if defined(TARGET_bfin) || defined(TARGET_lm32)
unsigned long persistent_data = 0;
#endif

Expand Down Expand Up @@ -692,6 +700,40 @@ output_relocs (
break;
default:
goto bad_resolved_reloc;
#elif defined(TARGET_lm32)
case R_LM32_HI16:
case R_LM32_LO16:
sym_vma = elf2flt_bfd_section_vma(sym_section);
sym_addr += sym_vma + q->addend;
/* remember the upper 16 bits */
if ((0xFFFF0000UL & sym_addr) != persistent_data) {
flat_relocs = (uint32_t *)realloc(flat_relocs,
(flat_reloc_count + 1) * sizeof (uint32_t));
if (verbose)
printf("New persistent data for %08"PRIx32"\n", sym_addr);
persistent_data = 0xFFFF0000UL & sym_addr;
pflags = FLAT_LM32_RELOC_TYPE_PERSIST;
pflags <<= 29;
flat_relocs[flat_reloc_count++] = pflags | (sym_addr >> 16);
}
pflags = q->howto->type == R_LM32_HI16 ?
FLAT_LM32_RELOC_TYPE_HI16_BIT :
FLAT_LM32_RELOC_TYPE_LO16_BIT;
pflags <<= 29;
relocation_needed = 1;
break;
case R_LM32_32:
sym_vma = elf2flt_bfd_section_vma(sym_section);
sym_addr += sym_vma + q->addend;
pflags = FLAT_LM32_RELOC_TYPE_32_BIT;
pflags <<= 29;
relocation_needed = 1;
break;
case R_LM32_CALL:
relocation_needed = 0;
break;
default:
goto bad_resolved_reloc;
#elif defined(TARGET_m68k)
case R_68K_32:
goto good_32bit_resolved_reloc;
Expand Down Expand Up @@ -1056,6 +1098,63 @@ output_relocs (
continue;
#endif

#ifdef TARGET_lm32
case R_LM32_HI16:
case R_LM32_LO16:
sym_vma = elf2flt_bfd_section_vma(sym_section);
sym_addr += sym_vma + q->addend;
/* remember the upper 16 bits */
if ((0xFFFF0000UL & sym_addr) != persistent_data) {
flat_relocs = (uint32_t *)realloc(flat_relocs,
(flat_reloc_count + 1) * sizeof (uint32_t));
if (verbose)
printf("New persistent data for %08"PRIx32"\n", sym_addr);
persistent_data = 0xFFFF0000UL & sym_addr;
pflags = FLAT_LM32_RELOC_TYPE_PERSIST;
pflags <<= 29;
flat_relocs[flat_reloc_count++] = pflags | (sym_addr >> 16);
}
pflags = q->howto->type == R_LM32_HI16 ?
FLAT_LM32_RELOC_TYPE_HI16_BIT :
FLAT_LM32_RELOC_TYPE_LO16_BIT;
pflags <<= 29;
relocation_needed = 1;
break;
case R_LM32_32:
sym_vma = elf2flt_bfd_section_vma(sym_section);
sym_addr += sym_vma + q->addend;
pflags = FLAT_LM32_RELOC_TYPE_32_BIT;
pflags <<= 29;
relocation_needed = 1;
break;
case R_LM32_CALL:
sym_vma = 0;
sym_addr += sym_vma + q->addend;
sym_addr -= q->address;
sym_addr = (int32_t)sym_addr >> q->howto->rightshift;
{
union {
uint32_t u;
int32_t s;
} rangecheck;

rangecheck.u = (unsigned)sym_addr << 6;
rangecheck.s >>= 6;
if (rangecheck.u != sym_addr) {
printf("ERROR: Relocation overflow for R_LM32_CALL relocation against %s\n", sym_name);
++bad_relocs;
continue;
}
}
relocation_needed = 0;
r_mem[0] = (r_mem[0] & 0xFCU) |
((sym_addr >> 24) & 0x03U);
r_mem[1] = (sym_addr >> 16) & 0xFFU;
r_mem[2] = (sym_addr >> 8) & 0xFFU;
r_mem[3] = sym_addr & 0xFFU;
break;
#endif

#ifdef TARGET_microblaze
case R_MICROBLAZE_64:
/* work out the relocation */
Expand Down Expand Up @@ -1625,6 +1724,21 @@ output_relocs (
break;
#endif

#ifdef TARGET_lm32
case R_LM32_HI16:
case R_LM32_LO16:
r_mem[2] = (sym_addr >> 8) & 0xFFU;
r_mem[3] = sym_addr & 0xFFU;
break;
case R_LM32_CALL:
/*
* use_resolved=…
* 0: already written above
* 1: no write necessary
*/
break;
#endif

default:
/* The alignment of the build host
might be stricter than that of the
Expand Down
2 changes: 2 additions & 0 deletions elf2flt.ld.in
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Original file line number Diff line number Diff line change
Expand Up @@ -73,6 +73,7 @@ W_RODAT: *(.rodata)
W_RODAT: *(.rodata1)
W_RODAT: *(.rodata.*)
W_RODAT: *(.gnu.linkonce.r*)
W_RODAT: *(.rofixup)

/* .ARM.extab name sections containing exception unwinding information */
*(.ARM.extab* .gnu.linkonce.armextab.*)
Expand Down Expand Up @@ -109,6 +110,7 @@ R_RODAT: *(.rodata)
R_RODAT: *(.rodata1)
R_RODAT: *(.rodata.*)
R_RODAT: *(.gnu.linkonce.r*)
R_RODAT: *(.rofixup)
*(.data)
*(.data1)
*(.data.*)
Expand Down
2 changes: 2 additions & 0 deletions flthdr.c
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Original file line number Diff line number Diff line change
Expand Up @@ -33,6 +33,8 @@ const char *elf2flt_progname;

#if defined TARGET_bfin
# define flat_get_relocate_addr(addr) (addr & 0x03ffffff)
#elif defined(TARGET_lm32)
# define flat_get_relocate_addr(addr) ((addr) & 0x1FFFFFFFU)
#else
# define flat_get_relocate_addr(addr) (addr)
#endif
Expand Down
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