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options/ansi: provide _setjmp and _longjmp in setjmp.h #1233

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Feb 6, 2025
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options/ansi: provide _setjmp and _longjmp in setjmp.h #1233

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9 changes: 9 additions & 0 deletions options/ansi/include/setjmp.h
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Original file line number Diff line number Diff line change
Expand Up @@ -21,6 +21,15 @@ typedef struct __jmp_buf {
__attribute__((__returns_twice__)) int setjmp(jmp_buf __buffer);
__attribute__((__noreturn__)) void longjmp(jmp_buf __buffer, int __value);

/* setjmp is defined as a function macro in the ISO C standard */
#define setjmp(env) setjmp(env)
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#if __MLIBC_POSIX_OPTION
__attribute__((__returns_twice__)) int _setjmp(jmp_buf __buffer);
/* POSIX-2017.1 says _longjmp shall be declared as a function */
__attribute__((__noreturn__)) void _longjmp(jmp_buf __buffer, int __value);
#endif /* __MLIBC_POSIX_OPTION */

#endif /* !__MLIBC_ABI_ONLY */

/* POSIX Non-local jumps signal extensions */
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6 changes: 6 additions & 0 deletions options/internal/aarch64/setjmp.S
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Expand Up @@ -27,7 +27,10 @@ __setjmp:

.global setjmp
.type setjmp, "function"
.global _setjmp
.type _setjmp, "function"
setjmp:
_setjmp:
mov x2, xzr
b __setjmp

Expand All @@ -39,7 +42,10 @@ sigsetjmp:

.global longjmp
.type longjmp, "function"
.global _longjmp
.type _longjmp, "function"
longjmp:
_longjmp:
ldp x19, x20, [x0, #0]
ldp x21, x22, [x0, #16]
ldp x23, x24, [x0, #32]
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6 changes: 6 additions & 0 deletions options/internal/m68k/setjmp.S
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Expand Up @@ -19,7 +19,10 @@ __setjmp:

.global setjmp
.type setjmp, "function"
.global _setjmp
.type _setjmp, "function"
setjmp:
_setjmp:
clr.l %d0
jmp __setjmp

Expand All @@ -31,7 +34,10 @@ sigsetjmp:

.global longjmp
.type longjmp, "function"
.global _longjmp
.type _longjmp, "function"
longjmp:
_longjmp:
movea.l 4(%sp),%a0
move.l 8(%sp),%d0
bne 1f
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6 changes: 6 additions & 0 deletions options/internal/riscv64/setjmp.S
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@@ -1,6 +1,9 @@
.global setjmp
.type setjmp, "function"
.global _setjmp
.type _setjmp, "function"
setjmp:
_setjmp:
sd ra, 0(a0)
sd s0, 8(a0)
sd s1, 16(a0)
Expand Down Expand Up @@ -37,7 +40,10 @@ sigsetjmp:

.global longjmp
.type longjmp, "function"
.global _longjmp
.type _longjmp, "function"
longjmp:
_longjmp:
ld ra,0(a0)
ld s0,8(a0)
ld s1,16(a0)
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6 changes: 6 additions & 0 deletions options/internal/x86/setjmp.S
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Expand Up @@ -22,7 +22,10 @@ __setjmp:

.global setjmp
.type setjmp, "function"
.global _setjmp
.type _setjmp, "function"
setjmp:
_setjmp:
xor %edx, %edx
jmp __setjmp

Expand All @@ -34,7 +37,10 @@ sigsetjmp:

.global longjmp
.type longjmp, "function"
.global _longjmp
.type _longjmp, "function"
longjmp:
_longjmp:
mov 4(%esp), %ecx
mov 0x00(%ecx), %ebx
mov 0x04(%ecx), %ebp
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6 changes: 6 additions & 0 deletions options/internal/x86_64/setjmp.S
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Expand Up @@ -23,7 +23,10 @@ __setjmp:

.global setjmp
.type setjmp, "function"
.global _setjmp
.type _setjmp, "function"
setjmp:
_setjmp:
xor %rdx, %rdx
jmp __setjmp

Expand All @@ -35,7 +38,10 @@ sigsetjmp:

.global longjmp
.type longjmp, "function"
.global _longjmp
.type _longjmp, "function"
longjmp:
_longjmp:
mov 0x00(%rdi), %rbx
mov 0x08(%rdi), %rbp
mov 0x10(%rdi), %r12
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