system/freebsd-src
system/freebsd-src
1
0
Fork 0
mirror of https://github.com/freebsd/freebsd-src synced 2024-09-06 17:18:32 +00:00
Code Issues Packages Projects Releases Wiki Activity

Use a single 'ld' to read the jmpbuf magic values instead of 'la; ld'.

Browse source 
This saves an instruction in each case as well as an extra memory
indirection via the GOT for PIC code.

Reviewed by:	br, James Clarke
Sponsored by:	DARPA
Differential Revision:	https://reviews.freebsd.org/D22656
This commit is contained in:
John Baldwin 2019-12-04 20:50:49 +00:00
parent 3487d66820
commit c0acb84da7
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=355402
2 changed files with 4 additions and 8 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

6
lib/libc/riscv/gen/_setjmp.S
View file

@ -39,8 +39,7 @@ __FBSDID("$FreeBSD$");
ENTRY(_setjmp)
/* Store the magic value and stack pointer */
la t0, .Lmagic
ld t0, 0(t0)
ld t0, .Lmagic
sd t0, (0 * 8)(a0)
sd sp, (1 * 8)(a0)
addi a0, a0, (2 * 8)
@ -89,8 +88,7 @@ END(_setjmp)
ENTRY(_longjmp)
/* Check the magic value */
ld t0, 0(a0)
la t1, .Lmagic
ld t1, 0(t1)
ld t1, .Lmagic
bne t0, t1, botch
/* Restore the stack pointer */

6
lib/libc/riscv/gen/setjmp.S
View file

@ -53,8 +53,7 @@ ENTRY(setjmp)
addi sp, sp, (2 * 8)
/* Store the magic value and stack pointer */
la t0, .Lmagic
ld t0, 0(t0)
ld t0, .Lmagic
sd t0, (0 * 8)(a0)
sd sp, (1 * 8)(a0)
addi a0, a0, (2 * 8)
@ -119,8 +118,7 @@ ENTRY(longjmp)
/* Check the magic value */
ld t0, 0(a0)
la t1, .Lmagic
ld t1, 0(t1)
ld t1, .Lmagic
bne t0, t1, botch
/* Restore the stack pointer */