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sparc: Remove _dl_skip_args usage

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Since ad43cac44a the generic code already shuffles the argv/envp/auxv
on the stack to remove the ld.so own arguments and thus _dl_skip_args
is always 0.   So there is no need to adjust the argc or argv.

Checked on sparc64-linux-gnu and sparcv9-linux-gnu.

Reviewed-by: Carlos O'Donell <carlos@redhat.com>
This commit is contained in:
Adhemerval Zanella 2022-05-26 13:14:37 -03:00
parent 4dc1f6530e
commit b6712b137f
2 changed files with 4 additions and 79 deletions
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41
sysdeps/sparc/sparc32/dl-machine.h
View File

@ -196,48 +196,9 @@ _dl_start_user:\n\
add %l7, %o7, %l7\n\
/* Save the user entry point address in %l0 */\n\
mov %o0, %l0\n\
/* See if we were run as a command with the executable file name as an\n\
extra leading argument. If so, adjust the contents of the stack. */\n\
" RTLD_GOT_ADDRESS(%l7, %g2, _dl_skip_args) "\n\
ld [%g2], %i0\n\
tst %i0\n\
beq 3f\n\
ld [%sp+22*4], %i5 /* load argc */\n\
/* Find out how far to shift. */\n\
" RTLD_GOT_ADDRESS(%l7, %l3, _dl_argv) "\n\
sub %i5, %i0, %i5\n\
ld [%l3], %l4\n\
sll %i0, 2, %i2\n\
st %i5, [%sp+22*4]\n\
sub %l4, %i2, %l4\n\
add %sp, 23*4, %i1\n\
add %i1, %i2, %i2\n\
st %l4, [%l3]\n\
/* Copy down argv */\n\
21: ld [%i2], %i3\n\
add %i2, 4, %i2\n\
tst %i3\n\
st %i3, [%i1]\n\
bne 21b\n\
add %i1, 4, %i1\n\
/* Copy down env */\n\
22: ld [%i2], %i3\n\
add %i2, 4, %i2\n\
tst %i3\n\
st %i3, [%i1]\n\
bne 22b\n\
add %i1, 4, %i1\n\
/* Copy down auxiliary table. */\n\
23: ld [%i2], %i3\n\
ld [%i2+4], %i4\n\
add %i2, 8, %i2\n\
tst %i3\n\
st %i3, [%i1]\n\
st %i4, [%i1+4]\n\
bne 23b\n\
add %i1, 8, %i1\n\
/* %o0 = _dl_loaded, %o1 = argc, %o2 = argv, %o3 = envp. */\n\
3: " RTLD_GOT_ADDRESS(%l7, %o0, _rtld_local) "\n\
" RTLD_GOT_ADDRESS(%l7, %o0, _rtld_local) "\n\
add %sp, 23*4, %o2\n\
sll %i5, 2, %o3\n\
add %o3, 4, %o3\n\

38
sysdeps/sparc/sparc64/dl-machine.h
View File

@ -245,45 +245,9 @@ elf_machine_runtime_setup (struct link_map *l, struct r_scope_elem *scope[],
" add %l7, %o7, %l7\n" \
" /* Save the user entry point address in %l0. */\n" \
" mov %o0, %l0\n" \
" /* See if we were run as a command with the executable file name as an\n" \
" extra leading argument. If so, we must shift things around since we\n" \
" must keep the stack doubleword aligned. */\n" \
RTLD_GOT_ADDRESS(%l7, %g5, _dl_skip_args) \
" ld [%g5], %i0\n" \
" brz,pt %i0, 2f\n" \
" ldx [%sp + " __S(STACK_BIAS) " + 22*8], %i5\n" \
" /* Find out how far to shift. */\n" \
" sub %i5, %i0, %i5\n" \
" sllx %i0, 3, %l6\n" \
RTLD_GOT_ADDRESS(%l7, %l4, _dl_argv) \
" stx %i5, [%sp + " __S(STACK_BIAS) " + 22*8]\n" \
" add %sp, " __S(STACK_BIAS) " + 23*8, %i1\n" \
" add %i1, %l6, %i2\n" \
" ldx [%l4], %l5\n" \
" /* Copy down argv. */\n" \
"12: ldx [%i2], %i3\n" \
" add %i2, 8, %i2\n" \
" stx %i3, [%i1]\n" \
" brnz,pt %i3, 12b\n" \
" add %i1, 8, %i1\n" \
" sub %l5, %l6, %l5\n" \
" /* Copy down envp. */\n" \
"13: ldx [%i2], %i3\n" \
" add %i2, 8, %i2\n" \
" stx %i3, [%i1]\n" \
" brnz,pt %i3, 13b\n" \
" add %i1, 8, %i1\n" \
" /* Copy down auxiliary table. */\n" \
"14: ldx [%i2], %i3\n" \
" ldx [%i2 + 8], %i4\n" \
" add %i2, 16, %i2\n" \
" stx %i3, [%i1]\n" \
" stx %i4, [%i1 + 8]\n" \
" brnz,pt %i3, 14b\n" \
" add %i1, 16, %i1\n" \
" stx %l5, [%l4]\n" \
" /* %o0 = _dl_loaded, %o1 = argc, %o2 = argv, %o3 = envp. */\n" \
"2:\t" RTLD_GOT_ADDRESS(%l7, %o0, _rtld_local) \
"" RTLD_GOT_ADDRESS(%l7, %o0, _rtld_local) \
" sllx %i5, 3, %o3\n" \
" add %sp, " __S(STACK_BIAS) " + 23*8, %o2\n" \
" add %o3, 8, %o3\n" \