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readelf: dump MIPS abiflags section

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This is not fully fleshed out but is sufficient to dump the
SHT_MIPS_ABIFLAGS used in FreeBSD.

Reviewed by:	imp
MFC after:	2 weeks
Sponsored by:	The FreeBSD Foundation
Differential Revision:	https://reviews.freebsd.org/D8241
This commit is contained in:
Ed Maste 2017-04-19 14:43:51 +00:00
parent 05d124644c
commit e9f3f88adf
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=317141
1 changed files with 82 additions and 0 deletions
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82
contrib/elftoolchain/readelf/readelf.c
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@ -296,6 +296,7 @@ static void dump_elf(struct readelf *re);
static void dump_dyn_val(struct readelf *re, GElf_Dyn *dyn, uint32_t stab);
static void dump_dynamic(struct readelf *re);
static void dump_liblist(struct readelf *re);
static void dump_mips_abiflags(struct readelf *re, struct section *s);
static void dump_mips_attributes(struct readelf *re, uint8_t *p, uint8_t *pe);
static void dump_mips_odk_reginfo(struct readelf *re, uint8_t *p, size_t sz);
static void dump_mips_options(struct readelf *re, struct section *s);
@ -325,6 +326,7 @@ static const char *dwarf_regname(struct readelf *re, unsigned int num);
static struct dumpop *find_dumpop(struct readelf *re, size_t si,
const char *sn, int op, int t);
static int get_ent_count(struct section *s, int *ent_count);
static int get_mips_register_size(uint8_t flag);
static char *get_regoff_str(struct readelf *re, Dwarf_Half reg,
Dwarf_Addr off);
static const char *get_string(struct readelf *re, int strtab, size_t off);
@ -4111,6 +4113,10 @@ dump_mips_specific_info(struct readelf *re)
}
}
if (s->name != NULL && (!strcmp(s->name, ".MIPS.abiflags") ||
(s->type == SHT_MIPS_ABIFLAGS)))
dump_mips_abiflags(re, s);
/*
* Dump .reginfo if present (although it will be ignored by an OS if a
* .MIPS.options section is present, according to SGI mips64 spec).
@ -4123,6 +4129,82 @@ dump_mips_specific_info(struct readelf *re)
}
}
static void
dump_mips_abiflags(struct readelf *re, struct section *s)
{
Elf_Data *d;
uint8_t *p;
int elferr;
uint32_t isa_ext, ases, flags1, flags2;
uint16_t version;
uint8_t isa_level, isa_rev, gpr_size, cpr1_size, cpr2_size, fp_abi;
if ((d = elf_rawdata(s->scn, NULL)) == NULL) {
elferr = elf_errno();
if (elferr != 0)
warnx("elf_rawdata failed: %s",
elf_errmsg(elferr));
return;
}
if (d->d_size != 24) {
warnx("invalid MIPS abiflags section size");
return;
}
p = d->d_buf;
version = re->dw_decode(&p, 2);
printf("MIPS ABI Flags Version: %u", version);
if (version != 0) {
printf(" (unknown)\n\n");
return;
}
printf("\n\n");
isa_level = re->dw_decode(&p, 1);
isa_rev = re->dw_decode(&p, 1);
gpr_size = re->dw_decode(&p, 1);
cpr1_size = re->dw_decode(&p, 1);
cpr2_size = re->dw_decode(&p, 1);
fp_abi = re->dw_decode(&p, 1);
isa_ext = re->dw_decode(&p, 4);
ases = re->dw_decode(&p, 4);
flags1 = re->dw_decode(&p, 4);
flags2 = re->dw_decode(&p, 4);
printf("ISA: ");
if (isa_rev <= 1)
printf("MIPS%u\n", isa_level);
else
printf("MIPS%ur%u\n", isa_level, isa_rev);
printf("GPR size: %d\n", get_mips_register_size(gpr_size));
printf("CPR1 size: %d\n", get_mips_register_size(cpr1_size));
printf("CPR2 size: %d\n", get_mips_register_size(cpr2_size));
printf("FP ABI: ");
switch (fp_abi) {
case 3:
printf("Soft float");
break;
default:
printf("%u", fp_abi);
break;
}
printf("\nISA Extension: %u\n", isa_ext);
printf("ASEs: %u\n", ases);
printf("FLAGS 1: %08x\n", flags1);
printf("FLAGS 2: %08x\n", flags2);
}
static int
get_mips_register_size(uint8_t flag)
{
switch (flag) {
case 0: return 0;
case 1: return 32;
case 2: return 64;
case 3: return 128;
default: return -1;
}
}
static void
dump_mips_reginfo(struct readelf *re, struct section *s)
{