diff options
| author | Andrew Turner <andrew@FreeBSD.org> | 2015-05-12 10:03:14 +0000 |
|---|---|---|
| committer | Andrew Turner <andrew@FreeBSD.org> | 2015-05-12 10:03:14 +0000 |
| commit | 2b6a6357f27570149995ff40ff909908a0bbb833 (patch) | |
| tree | 8c78ecaeb4a389d3842d051785d416b6a727ead2 /lib/libc/arm/gen | |
| parent | e4bc6b4c01d4661acc120649981a79b93978cae7 (diff) | |
Teach bits of libc about Thumb. This adds the if-then instructions needed
to handle the ARM conditional execution.
While here fix a bug found by this in the hard-float code, cc is the
opposite of cs. The former is used for 'less than' in floating-point code
and is executed when the C (carry) bit is clear, the latter is used when
greater than, equal, or unordered, and is executed when the C bit is set.
Notes
Notes:
svn path=/head/; revision=282816
Diffstat (limited to 'lib/libc/arm/gen')
| -rw-r--r-- | lib/libc/arm/gen/_setjmp.S | 17 | ||||
| -rw-r--r-- | lib/libc/arm/gen/setjmp.S | 17 |
2 files changed, 32 insertions, 2 deletions
diff --git a/lib/libc/arm/gen/_setjmp.S b/lib/libc/arm/gen/_setjmp.S index 387f8a92a501..3de9d99c56ec 100644 --- a/lib/libc/arm/gen/_setjmp.S +++ b/lib/libc/arm/gen/_setjmp.S @@ -85,7 +85,13 @@ ENTRY(_setjmp) add r0, r0, #(_JB_REG_R4 * 4) /* Store integer registers */ +#ifndef __thumb__ stmia r0, {r4-r14} +#else + stmia r0, {r4-r12} + str r13, [r0, #((_JB_REG_R13 - _JB_REG_R4) * 4)] + str r14, [r0, #((_JB_REG_R14 - _JB_REG_R4) * 4)] +#endif mov r0, #0x00000000 RET @@ -120,15 +126,24 @@ ENTRY(_longjmp) add r0, r0, #(_JB_REG_R4 * 4) /* Restore integer registers */ +#ifndef __thumb__ ldmia r0, {r4-r14} +#else + ldmia r0, {r4-r12} + ldr r13, [r0, #((_JB_REG_R13 - _JB_REG_R4) * 4)] + ldr r14, [r0, #((_JB_REG_R14 - _JB_REG_R4) * 4)] +#endif /* Validate sp and r14 */ teq sp, #0 + it ne teqne r14, #0 + it eq beq botch /* Set return value */ movs r0, r1 + it eq moveq r0, #0x00000001 RET @@ -137,7 +152,7 @@ botch: #if !defined(_STANDALONE) bl PIC_SYM(_C_LABEL(longjmperror), PLT) bl PIC_SYM(_C_LABEL(abort), PLT) - b . - 8 /* Cannot get here */ +1: b 1b /* Cannot get here */ #else b . #endif diff --git a/lib/libc/arm/gen/setjmp.S b/lib/libc/arm/gen/setjmp.S index ad4ba38f8f86..62695634a480 100644 --- a/lib/libc/arm/gen/setjmp.S +++ b/lib/libc/arm/gen/setjmp.S @@ -90,7 +90,13 @@ ENTRY(setjmp) /* Store integer registers */ add r0, r0, #(_JB_REG_R4 * 4) +#ifndef __thumb__ stmia r0, {r4-r14} +#else + stmia r0, {r4-r12} + str r13, [r0, #((_JB_REG_R13 - _JB_REG_R4) * 4)] + str r14, [r0, #((_JB_REG_R14 - _JB_REG_R4) * 4)] +#endif mov r0, #0x00000000 RET @@ -133,15 +139,24 @@ ENTRY(__longjmp) add r0, r0, #(_JB_REG_R4 * 4) /* Restore integer registers */ +#ifndef __thumb__ ldmia r0, {r4-r14} +#else + ldmia r0, {r4-r12} + ldr r13, [r0, #((_JB_REG_R13 - _JB_REG_R4) * 4)] + ldr r14, [r0, #((_JB_REG_R14 - _JB_REG_R4) * 4)] +#endif /* Validate sp and r14 */ teq sp, #0 + it ne teqne r14, #0 + it eq beq .Lbotch /* Set return value */ movs r0, r1 + it eq moveq r0, #0x00000001 RET @@ -149,5 +164,5 @@ ENTRY(__longjmp) .Lbotch: bl PIC_SYM(_C_LABEL(longjmperror), PLT) bl PIC_SYM(_C_LABEL(abort), PLT) - b . - 8 /* Cannot get here */ +1: b 1b /* Cannot get here */ END(__longjmp) |