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sparc: Fix argument passing to __libc_start_main (BZ 32981) 

sparc start.S does not provide the final argument for
__libc_start_main, which is the highest stack address used to
update the __libc_stack_end.A

This fixes elf/tst-execstack-prog-static-tunable on sparc64.
On sparcv9 this does not happen because the kernel puts an
auxv value, which turns to point to a value in the stack itself.

Checked on sparc64-linux-gnu.

Reviewed-by: Florian Weimer <fweimer@redhat.com>

(cherry picked from commit 404526ee2e)
This commit is contained in:
Adhemerval Zanella 2025-05-30 12:40:04 -03:00
parent 515d4166f4
commit d952c6efaa
3 changed files with 10 additions and 0 deletions
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2
NEWS
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@ -29,6 +29,8 @@ The following bugs were resolved with this release:
[32882] tst-audit10 fails with SIGILL on CPUs without AVX
[32897] dynamic-link: pthread_getattr_np fails when executable stack
tunable is set
[32981] ports: elf/tst-execstack-prog-static-tunable fails on
sparc64-linux-gnu
[32987] elf: Fix subprocess status handling for tst-dlopen-sgid
Version 2.41

4
sysdeps/sparc/sparc32/start.S
View File

@ -73,6 +73,10 @@ _start:
be NULL. */
mov %g1, %o5
/* Provide the highest stack address to update the __libc_stack_end (used
to enable executable stacks if required). */
st %sp, [%sp+23*4]
/* Let libc do the rest of the initialization, and call main. */
call __libc_start_main
nop

4
sysdeps/sparc/sparc64/start.S
View File

@ -74,6 +74,10 @@ _start:
be NULL. */
mov %g1, %o5
/* Provide the highest stack address to update the __libc_stack_end (used
to enable executable stacks if required). */
stx %sp, [%sp+STACK_BIAS+22*8]
/* Let libc do the rest of the initialization, and call main. */
call __libc_start_main
nop